external & build dependences in src tree

- external & build dependences boost licensed
  - ext_depends (external depends)
    - D-YAML
      - tinyendian
    - d2sqlite3
    - imageformats
  - build_depends
    - dub2nix

9 files changed, 15549 insertions, 0 deletions

diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/database.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/database.d
new file mode 100644
index 0000000..7aebe63
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/database.d
@@ -0,0 +1,1353 @@
+/++
+Managing SQLite3 database connections.
+
+Authors:
+    Nicolas Sicard (biozic) and other contributors at $(LINK https://github.com/biozic/d2sqlite3)
+
+Copyright:
+    Copyright 2011-18 Nicolas Sicard.
+
+License:
+    $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
++/
+module d2sqlite3.database;
+
+import d2sqlite3.statement;
+import d2sqlite3.results;
+import d2sqlite3.sqlite3;
+import d2sqlite3.internal.memory;
+import d2sqlite3.internal.util;
+
+import std.conv : text, to;
+import std.exception : enforce;
+import std.string : format, fromStringz, toStringz;
+import std.typecons : Nullable;
+
+import core.stdc.stdlib : free;
+
+/// Set _UnlockNotify version if compiled with SqliteEnableUnlockNotify or SqliteFakeUnlockNotify
+version (SqliteEnableUnlockNotify) version = _UnlockNotify;
+else version (SqliteFakeUnlockNotify) version = _UnlockNotify;
+
+/// Type for the internal representation of blobs
+alias Blob = immutable(ubyte)[];
+
+/// SQLite type codes
+enum SqliteType
+{
+    INTEGER = SQLITE_INTEGER, ///
+    FLOAT = SQLITE_FLOAT, ///
+    TEXT = SQLITE3_TEXT, ///
+    BLOB = SQLITE_BLOB, ///
+    NULL = SQLITE_NULL ///
+}
+
+/++
+A caracteristic of user-defined functions or aggregates.
++/
+enum Deterministic
+{
+    /++
+    The returned value is the same if the function is called with the same parameters.
+    +/
+    yes = 0x800,
+
+    /++
+    The returned value can vary even if the function is called with the same parameters.
+    +/
+    no = 0
+}
+
+/++
+An database connection.
+
+This struct is a reference-counted wrapper around a `sqlite3*` pointer.
++/
+struct Database
+{
+    import std.traits : isFunctionPointer, isDelegate;
+    import std.typecons : RefCounted, RefCountedAutoInitialize;
+
+private:
+    struct Payload
+    {
+        sqlite3* handle;
+        void* updateHook;
+        void* commitHook;
+        void* rollbackHook;
+        void* progressHandler;
+        void* traceCallback;
+        void* profileCallback;
+        version (_UnlockNotify) IUnlockNotifyHandler unlockNotifyHandler;
+        debug string filename;
+
+        this(sqlite3* handle) nothrow
+        {
+            this.handle = handle;
+        }
+
+        ~this() nothrow
+        {
+            debug ensureNotInGC!Database(filename);
+            free(updateHook);
+            free(commitHook);
+            free(rollbackHook);
+            free(progressHandler);
+            free(traceCallback);
+            free(profileCallback);
+
+            if (!handle)
+                return;
+            sqlite3_progress_handler(handle, 0, null, null);
+            sqlite3_close(handle);
+        }
+    }
+
+    RefCounted!(Payload, RefCountedAutoInitialize.no) p;
+
+    void check(int result)
+    {
+        enforce(result == SQLITE_OK, new SqliteException(errmsg(p.handle), result));
+    }
+
+public:
+    /++
+    Opens a database connection.
+
+    Params:
+        path = The path to the database file. In recent versions of SQLite, the path can be
+        an URI with options.
+
+        flags = Options flags.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/open.html) to know how to use the flags
+    parameter or to use path as a file URI if the current configuration allows it.
+    +/
+    this(string path, int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE)
+    {
+        sqlite3* hdl;
+        auto result = sqlite3_open_v2(path.toStringz, &hdl, flags, null);
+        enforce(result == SQLITE_OK, new SqliteException(hdl ? errmsg(hdl) : "Error opening the database", result));
+        p = Payload(hdl);
+        debug p.filename = path;
+    }
+
+    /++
+    Explicitly closes the database connection.
+
+    After a successful call to `close()`, using the database connection or one of its prepared
+    statement is an error. The `Database` object is destroyed and cannot be used any more.
+    +/
+    void close()
+    {
+        auto result = sqlite3_close(p.handle);
+        enforce(result == SQLITE_OK, new SqliteException(errmsg(p.handle), result));
+        p.handle = null;
+        destroy(p);
+    }
+
+    /++
+    Gets the SQLite internal _handle of the database connection.
+    +/
+    sqlite3* handle() @property nothrow
+    {
+        return p.handle;
+    }
+
+    /++
+    Gets the path associated with an attached database.
+
+    Params:
+        database = The name of an attached database.
+
+    Returns: The absolute path of the attached database.
+        If there is no attached database, or if database is a temporary or
+        in-memory database, then null is returned.
+    +/
+    string attachedFilePath(string database = "main")
+    {
+        assert(p.handle);
+        return sqlite3_db_filename(p.handle, database.toStringz).to!string;
+    }
+
+    /++
+    Gets the read-only status of an attached database.
+
+    Params:
+        database = The name of an attached database.
+    +/
+    bool isReadOnly(string database = "main")
+    {
+        assert(p.handle);
+        immutable ret = sqlite3_db_readonly(p.handle, database.toStringz);
+        enforce(ret >= 0, new SqliteException("Database not found: %s".format(database), ret));
+        return ret == 1;
+    }
+
+    /++
+    Gets metadata for a specific table column of an attached database.
+
+    Params:
+        table = The name of the table.
+
+        column = The name of the column.
+
+        database = The name of a database attached. If null, then all attached databases
+        are searched for the table using the same algorithm used by the database engine
+        to resolve unqualified table references.
+    +/
+    TableColumnMetadata tableColumnMetadata(string table, string column, string database = "main")
+    {
+        TableColumnMetadata data;
+        char* pzDataType, pzCollSeq;
+        int notNull, primaryKey, autoIncrement;
+        assert(p.handle);
+        check(sqlite3_table_column_metadata(p.handle, database.toStringz, table.toStringz,
+            column.toStringz, &pzDataType, &pzCollSeq, &notNull, &primaryKey, &autoIncrement));
+        data.declaredTypeName = pzDataType.to!string;
+        data.collationSequenceName = pzCollSeq.to!string;
+        data.isNotNull = cast(bool) notNull;
+        data.isPrimaryKey = cast(bool) primaryKey;
+        data.isAutoIncrement = cast(bool) autoIncrement;
+        return data;
+    }
+
+    /++
+    Executes a single SQL statement and returns the results directly.
+
+    It's the equivalent of `prepare(sql).execute()`.
+    Or when used with args the equivalent of:
+    ---
+    auto stm = prepare(sql);
+    stm.bindAll(args);
+    stm.execute();
+    ---
+
+    The results become undefined when the Database goes out of scope and is destroyed.
+
+    Params:
+        sql = The code of the SQL statement.
+        args = Optional arguments to bind to the SQL statement.
+    +/
+    ResultRange execute(Args...)(string sql, Args args)
+    {
+        auto stm = prepare(sql);
+        static if (Args.length) stm.bindAll(args);
+        return stm.execute();
+    }
+    ///
+    unittest
+    {
+        auto db = Database(":memory:");
+        db.execute("CREATE TABLE test (val INTEGER)");
+        db.execute("INSERT INTO test (val) VALUES (:v)", 1);
+        assert(db.execute("SELECT val FROM test WHERE val=:v", 1).oneValue!int == 1);
+    }
+
+    /++
+    Runs an SQL script that can contain multiple statements.
+
+    Params:
+        script = The code of the SQL script.
+
+        dg = A delegate to call for each statement to handle the results. The passed
+        ResultRange will be empty if a statement doesn't return rows. If the delegate
+        return false, the execution is aborted.
+    +/
+    void run(string script, bool delegate(ResultRange) dg = null)
+    {
+        foreach (sql; script.byStatement)
+        {
+            auto stmt = prepare(sql);
+            auto results = stmt.execute();
+            if (dg && !dg(results))
+                return;
+        }
+    }
+    ///
+    unittest
+    {
+        auto db = Database(":memory:");
+        db.run(`CREATE TABLE test1 (val INTEGER);
+                CREATE TABLE test2 (val FLOAT);
+                DROP TABLE test1;
+                DROP TABLE test2;`);
+    }
+
+    /++
+    Prepares (compiles) a single SQL statement and returns it, so that it can be bound to
+    values before execution.
+
+    The statement becomes invalid if the Database goes out of scope and is destroyed.
+    +/
+    Statement prepare(string sql)
+    {
+        return Statement(this, sql);
+    }
+
+    /// Convenience functions equivalent to an SQL statement.
+    void begin() { execute("BEGIN"); }
+    /// Ditto
+    void commit() { execute("COMMIT"); }
+    /// Ditto
+    void rollback() { execute("ROLLBACK"); }
+
+    /++
+    Returns the rowid of the last INSERT statement.
+    +/
+    long lastInsertRowid()
+    {
+        assert(p.handle);
+        return sqlite3_last_insert_rowid(p.handle);
+    }
+
+    /++
+    Gets the number of database rows that were changed, inserted or deleted by the most
+    recently executed SQL statement.
+    +/
+    int changes() @property nothrow
+    {
+        assert(p.handle);
+        return sqlite3_changes(p.handle);
+    }
+
+    /++
+    Gets the number of database rows that were changed, inserted or deleted since the
+    database was opened.
+    +/
+    int totalChanges() @property nothrow
+    {
+        assert(p.handle);
+        return sqlite3_total_changes(p.handle);
+    }
+
+    /++
+    Gets the SQLite error code of the last operation.
+    +/
+    int errorCode() @property nothrow
+    {
+        return p.handle ? sqlite3_errcode(p.handle) : 0;
+    }
+
+    /++
+    Interrupts any pending database operations.
+
+    It's safe to call this function from anouther thread.
+
+    See_also: $(LINK http://www.sqlite.org/c3ref/interrupt.html).
+    +/
+    void interrupt()
+    {
+        assert(p.handle);
+        sqlite3_interrupt(p.handle);
+    }
+
+    /++
+    Sets a connection configuration option.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/db_config.html).
+    +/
+    void config(Args...)(int code, Args args)
+    {
+        assert(p.handle);
+        auto result = sqlite3_db_config(p.handle, code, args);
+        enforce(result == SQLITE_OK, new SqliteException("Database configuration: error %s".format(result), result));
+    }
+
+    /++
+    Enables or disables loading extensions.
+    +/
+    void enableLoadExtensions(bool enable = true)
+    {
+        assert(p.handle);
+        immutable ret = sqlite3_enable_load_extension(p.handle, enable);
+        enforce(ret == SQLITE_OK,
+            new SqliteException("Could not enable loading extensions.", ret));
+    }
+
+    /++
+    Loads an extension.
+
+    Params:
+        path = The path of the extension file.
+
+        entryPoint = The name of the entry point function. If null is passed, SQLite
+        uses the name of the extension file as the entry point.
+    +/
+    void loadExtension(string path, string entryPoint = null)
+    {
+        assert(p.handle);
+        char* p_err;
+        scope (failure)
+            sqlite3_free(p_err);
+
+        immutable ret = sqlite3_load_extension(p.handle, path.toStringz, entryPoint.toStringz, &p_err);
+        enforce(ret == SQLITE_OK, new SqliteException(
+                "Could not load extension: %s:%s (%s)".format(entryPoint, path,
+                p_err !is null ? fromStringz(p_err) : "No additional info"), ret));
+    }
+
+    /++
+    Creates and registers a new function in the database.
+
+    If a function with the same name and the same arguments already exists, it is replaced
+    by the new one.
+
+    The memory associated with the function will be released when the database connection
+    is closed.
+
+    Params:
+        name = The name that the function will have in the database.
+
+        fun = a delegate or function that implements the function. $(D_PARAM fun)
+        must satisfy the following criteria:
+            $(UL
+                $(LI It must not be variadic.)
+                $(LI Its arguments must all have a type that is compatible with SQLite types:
+                it must be a boolean or numeric type, a string, an array, `null`,
+                or a `Nullable!T` where T is any of the previous types.)
+                $(LI Its return value must also be of a compatible type.)
+            )
+            or
+            $(UL
+                $(LI It must be a normal or type-safe variadic function where the arguments
+                are of type `ColumnData`. In other terms, the signature of the function must be:
+                `function(ColumnData[] args)` or `function(ColumnData[] args...)`)
+                $(LI Its return value must be a boolean or numeric type, a string, an array, `null`,
+                or a `Nullable!T` where T is any of the previous types.)
+            )
+        Pass a `null` function pointer to delete the function from the database connection.
+
+        det = Tells SQLite whether the result of the function is deterministic, i.e. if the
+        result is the same when called with the same parameters. Recent versions of SQLite
+        perform optimizations based on this. Set to `Deterministic.no` otherwise.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/create_function.html).
+    +/
+    void createFunction(T)(string name, T fun, Deterministic det = Deterministic.yes)
+        if (isFunctionPointer!T || isDelegate!T)
+    {
+        import std.meta : AliasSeq, staticMap, EraseAll;
+        import std.traits : variadicFunctionStyle, Variadic, ParameterTypeTuple,
+            ParameterDefaultValueTuple, ReturnType, Unqual;
+
+        static assert(variadicFunctionStyle!(fun) == Variadic.no
+            || is(ParameterTypeTuple!fun == AliasSeq!(ColumnData[])),
+            "only type-safe variadic functions with ColumnData arguments are supported");
+
+        static if (is(ParameterTypeTuple!fun == AliasSeq!(ColumnData[])))
+        {
+            extern(C) static nothrow
+            void x_func(sqlite3_context* context, int argc, sqlite3_value** argv)
+            {
+                string name;
+                try
+                {
+                    import std.array : appender;
+                    auto args = appender!(ColumnData[]);
+
+                    foreach (i; 0 .. argc)
+                    {
+                        auto value = argv[i];
+                        immutable type = sqlite3_value_type(value);
+
+                        final switch (type)
+                        {
+                            case SqliteType.INTEGER:
+                                args.put(ColumnData(getValue!long(value)));
+                                break;
+
+                            case SqliteType.FLOAT:
+                                args.put(ColumnData(getValue!double(value)));
+                                break;
+
+                            case SqliteType.TEXT:
+                                args.put(ColumnData(getValue!string(value)));
+                                break;
+
+                            case SqliteType.BLOB:
+                                args.put(ColumnData(getValue!Blob(value)));
+                                break;
+
+                            case SqliteType.NULL:
+                                args.put(ColumnData(null));
+                                break;
+                        }
+                    }
+
+                    auto ptr = sqlite3_user_data(context);
+
+                    auto wrappedDelegate = delegateUnwrap!T(ptr);
+                    auto dlg = wrappedDelegate.dlg;
+                    name = wrappedDelegate.name;
+                    setResult(context, dlg(args.data));
+                }
+                catch (Exception e)
+                {
+                    sqlite3_result_error(context, "error in function %s(): %s"
+                        .nothrowFormat(name, e.msg).toStringz, -1);
+                }
+            }
+        }
+        else
+        {
+            static assert(!is(ReturnType!fun == void), "function must not return void");
+
+            alias PT = staticMap!(Unqual, ParameterTypeTuple!fun);
+            alias PD = ParameterDefaultValueTuple!fun;
+
+            extern (C) static nothrow
+            void x_func(sqlite3_context* context, int argc, sqlite3_value** argv)
+            {
+                string name;
+                try
+                {
+                    // Get the deledate and its name
+                    auto ptr = sqlite3_user_data(context);
+                    auto wrappedDelegate = delegateUnwrap!T(ptr);
+                    auto dlg = wrappedDelegate.dlg;
+                    name = wrappedDelegate.name;
+
+                    enum maxArgc = PT.length;
+                    enum minArgc = PT.length - EraseAll!(void, PD).length;
+
+                    if (argc > maxArgc)
+                    {
+                        auto txt = ("too many arguments in function %s(), expecting at most %s"
+                            ).format(name, maxArgc);
+                        sqlite3_result_error(context, txt.toStringz, -1);
+                    }
+                    else if (argc < minArgc)
+                    {
+                        auto txt = ("too few arguments in function %s(), expecting at least %s"
+                            ).format(name, minArgc);
+                        sqlite3_result_error(context, txt.toStringz, -1);
+                    }
+                    else
+                    {
+                        PT args;
+                        foreach (i, type; PT)
+                        {
+                            if (i < argc)
+                                args[i] = getValue!type(argv[i]);
+                            else
+                                static if (is(typeof(PD[i])))
+                                    args[i] = PD[i];
+                        }
+                        setResult(context, dlg(args));
+                    }
+                }
+                catch (Exception e)
+                {
+                    sqlite3_result_error(context, "error in function %s(): %s"
+                        .nothrowFormat(name, e.msg).toStringz, -1);
+                }
+            }
+        }
+
+        assert(name.length, "function has an empty name");
+
+        if (!fun)
+            createFunction(name, null);
+
+        assert(p.handle);
+        check(sqlite3_create_function_v2(p.handle, name.toStringz, -1,
+              SQLITE_UTF8 | det, delegateWrap(fun, name), &x_func, null, null, &free));
+    }
+    ///
+    unittest
+    {
+        string star(int count, string starSymbol = "*")
+        {
+            import std.range : repeat;
+            import std.array : join;
+
+            return starSymbol.repeat(count).join;
+        }
+
+        auto db = Database(":memory:");
+        db.createFunction("star", &star);
+        assert(db.execute("SELECT star(5)").oneValue!string == "*****");
+        assert(db.execute("SELECT star(3, '♥')").oneValue!string == "♥♥♥");
+    }
+    ///
+    unittest
+    {
+        // The implementation of the new function
+        string myList(ColumnData[] args)
+        {
+            import std.array : appender;
+            import std.string : format, join;
+
+            auto app = appender!(string[]);
+            foreach (arg; args)
+            {
+                if (arg.type == SqliteType.TEXT)
+                    app.put(`"%s"`.format(arg));
+                else
+                    app.put("%s".format(arg));
+            }
+            return app.data.join(", ");
+        }
+
+        auto db = Database(":memory:");
+        db.createFunction("my_list", &myList);
+        auto list = db.execute("SELECT my_list(42, 3.14, 'text', NULL)").oneValue!string;
+        assert(list == `42, 3.14, "text", null`);
+    }
+
+    /// Ditto
+    void createFunction(T)(string name, T fun = null)
+        if (is(T == typeof(null)))
+    {
+        assert(name.length, "function has an empty name");
+        assert(p.handle);
+        check(sqlite3_create_function_v2(p.handle, name.toStringz, -1, SQLITE_UTF8,
+                null, fun, null, null, null));
+    }
+
+    /++
+    Creates and registers a new aggregate function in the database.
+
+    Params:
+        name = The name that the aggregate function will have in the database.
+
+        agg = The struct of type T implementing the aggregate. T must implement
+        at least these two methods: `accumulate()` and `result()`.
+        Each parameter and the returned type of `accumulate()` and `result()` must be
+        a boolean or numeric type, a string, an array, `null`, or a `Nullable!T`
+        where T is any of the previous types. These methods cannot be variadic.
+
+        det = Tells SQLite whether the result of the function is deterministic, i.e. if the
+        result is the same when called with the same parameters. Recent versions of SQLite
+        perform optimizations based on this. Set to `Deterministic.no` otherwise.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/create_function.html).
+    +/
+    void createAggregate(T)(string name, T agg, Deterministic det = Deterministic.yes)
+    {
+        import std.meta : staticMap;
+        import std.traits : isAggregateType, ReturnType, variadicFunctionStyle, Variadic,
+            Unqual, ParameterTypeTuple;
+        import core.stdc.stdlib : malloc;
+
+        static assert(isAggregateType!T,
+            T.stringof ~ " should be an aggregate type");
+        static assert(is(typeof(T.accumulate) == function),
+            T.stringof ~ " should have a method named accumulate");
+        static assert(is(typeof(T.result) == function),
+            T.stringof ~ " should have a method named result");
+        static assert(is(typeof({
+                alias RT = ReturnType!(T.result);
+                setResult!RT(null, RT.init);
+            })), T.stringof ~ ".result should return an SQLite-compatible type");
+        static assert(variadicFunctionStyle!(T.accumulate) == Variadic.no,
+            "variadic functions are not supported");
+        static assert(variadicFunctionStyle!(T.result) == Variadic.no,
+            "variadic functions are not supported");
+
+        alias PT = staticMap!(Unqual, ParameterTypeTuple!(T.accumulate));
+        alias RT = ReturnType!(T.result);
+
+        static struct Context
+        {
+            T aggregate;
+            string functionName;
+        }
+
+        extern(C) static nothrow
+        void x_step(sqlite3_context* context, int /* argc */, sqlite3_value** argv)
+        {
+            auto ctx = cast(Context*) sqlite3_user_data(context);
+            if (!ctx)
+            {
+                sqlite3_result_error_nomem(context);
+                return;
+            }
+
+            PT args;
+            try
+            {
+                foreach (i, type; PT)
+                    args[i] = getValue!type(argv[i]);
+
+                ctx.aggregate.accumulate(args);
+            }
+            catch (Exception e)
+            {
+                sqlite3_result_error(context, "error in aggregate function %s(): %s"
+                    .nothrowFormat(ctx.functionName, e.msg).toStringz, -1);
+            }
+        }
+
+        extern(C) static nothrow
+        void x_final(sqlite3_context* context)
+        {
+            auto ctx = cast(Context*) sqlite3_user_data(context);
+            if (!ctx)
+            {
+                sqlite3_result_error_nomem(context);
+                return;
+            }
+
+            try
+            {
+                setResult(context, ctx.aggregate.result());
+            }
+            catch (Exception e)
+            {
+                sqlite3_result_error(context, "error in aggregate function %s(): %s"
+                    .nothrowFormat(ctx.functionName, e.msg).toStringz, -1);
+            }
+        }
+
+        static if (is(T == class) || is(T == Interface))
+            assert(agg, "Attempt to create an aggregate function from a null reference");
+
+        auto ctx = cast(Context*) malloc(Context.sizeof);
+        ctx.aggregate = agg;
+        ctx.functionName = name;
+
+        assert(p.handle);
+        check(sqlite3_create_function_v2(p.handle, name.toStringz, PT.length, SQLITE_UTF8 | det,
+            cast(void*) ctx, null, &x_step, &x_final, &free));
+    }
+    ///
+    unittest // Aggregate creation
+    {
+        import std.array : Appender, join;
+
+        // The implementation of the aggregate function
+        struct Joiner
+        {
+            private
+            {
+                Appender!(string[]) stringList;
+                string separator;
+            }
+
+            this(string separator)
+            {
+                this.separator = separator;
+            }
+
+            void accumulate(string word)
+            {
+                stringList.put(word);
+            }
+
+            string result()
+            {
+                return stringList.data.join(separator);
+            }
+        }
+
+        auto db = Database(":memory:");
+        db.run("CREATE TABLE test (word TEXT);
+                INSERT INTO test VALUES ('My');
+                INSERT INTO test VALUES ('cat');
+                INSERT INTO test VALUES ('is');
+                INSERT INTO test VALUES ('black');");
+
+        db.createAggregate("dash_join", Joiner("-"));
+        auto text = db.execute("SELECT dash_join(word) FROM test").oneValue!string;
+        assert(text == "My-cat-is-black");
+    }
+
+    /++
+    Creates and registers a collation function in the database.
+
+    Params:
+        name = The name that the function will have in the database.
+
+        fun = a delegate or function that implements the collation. The function $(D_PARAM fun)
+        must be `nothrow`` and satisfy these criteria:
+            $(UL
+                $(LI Takes two string arguments (s1 and s2). These two strings are slices of C-style strings
+                  that SQLite manages internally, so there is no guarantee that they are still valid
+                  when the function returns.)
+                $(LI Returns an integer (ret).)
+                $(LI If s1 is less than s2, ret < 0.)
+                $(LI If s1 is equal to s2, ret == 0.)
+                $(LI If s1 is greater than s2, ret > 0.)
+                $(LI If s1 is equal to s2, then s2 is equal to s1.)
+                $(LI If s1 is equal to s2 and s2 is equal to s3, then s1 is equal to s3.)
+                $(LI If s1 is less than s2, then s2 is greater than s1.)
+                $(LI If s1 is less than s2 and s2 is less than s3, then s1 is less than s3.)
+            )
+
+    See_Also: $(LINK http://www.sqlite.org/lang_aggfunc.html)
+    +/
+    void createCollation(T)(string name, T fun)
+        if (isFunctionPointer!T || isDelegate!T)
+    {
+        import std.traits : isImplicitlyConvertible, functionAttributes, FunctionAttribute,
+            ParameterTypeTuple, isSomeString, ReturnType;
+
+        static assert(isImplicitlyConvertible!(typeof(fun("a", "b")), int),
+            "the collation function has a wrong signature");
+
+        static assert(functionAttributes!(T) & FunctionAttribute.nothrow_,
+            "only nothrow functions are allowed as collations");
+
+        alias PT = ParameterTypeTuple!fun;
+        static assert(isSomeString!(PT[0]),
+            "the first argument of function " ~ name ~ " should be a string");
+        static assert(isSomeString!(PT[1]),
+            "the second argument of function " ~ name ~ " should be a string");
+        static assert(isImplicitlyConvertible!(ReturnType!fun, int),
+            "function " ~ name ~ " should return a value convertible to an int");
+
+        extern (C) static nothrow
+        int x_compare(void* ptr, int n1, const(void)* str1, int n2, const(void)* str2)
+        {
+            static string slice(const(void)* str, int n) nothrow
+            {
+                // The string data is owned by SQLite, so it should be safe
+                // to take a slice of it.
+                return str ? (cast(immutable) (cast(const(char)*) str)[0 .. n]) : null;
+            }
+
+            return delegateUnwrap!T(ptr).dlg(slice(str1, n1), slice(str2, n2));
+        }
+
+        assert(p.handle);
+        auto dgw = delegateWrap(fun, name);
+        auto result = sqlite3_create_collation_v2(p.handle, name.toStringz, SQLITE_UTF8,
+            delegateWrap(fun, name), &x_compare, &free);
+        if (result != SQLITE_OK)
+        {
+            free(dgw);
+            throw new SqliteException(errmsg(p.handle), result);
+        }
+    }
+    ///
+    unittest // Collation creation
+    {
+        // The implementation of the collation
+        int my_collation(string s1, string s2) nothrow
+        {
+            import std.uni : icmp;
+            import std.exception : assumeWontThrow;
+
+            return assumeWontThrow(icmp(s1, s2));
+        }
+
+        auto db = Database(":memory:");
+        db.createCollation("my_coll", &my_collation);
+        db.run("CREATE TABLE test (word TEXT);
+                INSERT INTO test (word) VALUES ('straße');
+                INSERT INTO test (word) VALUES ('strasses');");
+
+        auto word = db.execute("SELECT word FROM test ORDER BY word COLLATE my_coll")
+                      .oneValue!string;
+        assert(word == "straße");
+    }
+
+    /++
+    Registers a delegate of type `UpdateHookDelegate` as the database's update hook.
+
+    Any previously set hook is released. Pass `null` to disable the callback.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/commit_hook.html).
+    +/
+    void setUpdateHook(UpdateHookDelegate updateHook)
+    {
+        extern(C) static nothrow
+        void callback(void* ptr, int type, const(char)* dbName, const(char)* tableName, long rowid)
+        {
+            WrappedDelegate!UpdateHookDelegate* dg;
+            dg = delegateUnwrap!UpdateHookDelegate(ptr);
+            dg.dlg(type, dbName.to!string, tableName.to!string, rowid);
+        }
+
+        free(p.updateHook);
+        p.updateHook = delegateWrap(updateHook);
+        assert(p.handle);
+        sqlite3_update_hook(p.handle, &callback, p.updateHook);
+    }
+
+    /++
+    Registers a delegate of type `CommitHookDelegate` as the database's commit hook.
+    Any previously set hook is released.
+
+    Params:
+        commitHook = A delegate that should return a non-zero value
+        if the operation must be rolled back, or 0 if it can commit.
+        Pass `null` to disable the callback.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/commit_hook.html).
+    +/
+    void setCommitHook(CommitHookDelegate commitHook)
+    {
+        extern(C) static nothrow
+        int callback(void* ptr)
+        {
+            auto dlg = delegateUnwrap!CommitHookDelegate(ptr).dlg;
+            return dlg();
+        }
+
+        free(p.commitHook);
+        p.commitHook = delegateWrap(commitHook);
+        assert(p.handle);
+        sqlite3_commit_hook(p.handle, &callback, p.commitHook);
+    }
+
+    /++
+    Registers a delegate of type `RoolbackHookDelegate` as the database's rollback hook.
+
+    Any previously set hook is released.
+    Pass `null` to disable the callback.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/commit_hook.html).
+    +/
+    void setRollbackHook(RoolbackHookDelegate rollbackHook)
+    {
+        extern(C) static nothrow
+        void callback(void* ptr)
+        {
+            auto dlg = delegateUnwrap!RoolbackHookDelegate(ptr).dlg;
+            dlg();
+        }
+
+        free(p.rollbackHook);
+        p.rollbackHook = delegateWrap(rollbackHook);
+        assert(p.handle);
+        sqlite3_rollback_hook(p.handle, &callback, p.rollbackHook);
+    }
+
+    /++
+    Registers a delegate of type `ProgressHandlerDelegate` as the progress handler.
+
+    Any previously set handler is released.
+    Pass `null` to disable the callback.
+
+    Params:
+        pace = The approximate number of virtual machine instructions that are
+        evaluated between successive invocations of the handler.
+
+        progressHandler = A delegate that should return 0 if the operation can continue
+        or another value if it must be aborted.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/progress_handler.html).
+    +/
+    void setProgressHandler(int pace, ProgressHandlerDelegate progressHandler)
+    {
+        extern(C) static nothrow
+        int callback(void* ptr)
+        {
+            auto dlg = delegateUnwrap!ProgressHandlerDelegate(ptr).dlg;
+            return dlg();
+        }
+
+        free(p.progressHandler);
+        p.progressHandler = delegateWrap(progressHandler);
+        assert(p.handle);
+        sqlite3_progress_handler(p.handle, pace, &callback, p.progressHandler);
+    }
+
+    /++
+    Registers a delegate of type `TraceCallbackDelegate` as the trace callback.
+
+    Any previously set profile or trace callback is released.
+    Pass `null` to disable the callback.
+
+    The string parameter that is passed to the callback is the SQL text of the statement being
+    executed.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/profile.html).
+    +/
+    void setTraceCallback(TraceCallbackDelegate traceCallback)
+    {
+        extern(C) static nothrow
+        void callback(void* ptr, const(char)* str)
+        {
+            auto dlg = delegateUnwrap!TraceCallbackDelegate(ptr).dlg;
+            dlg(str.to!string);
+        }
+
+        free(p.traceCallback);
+        p.traceCallback = delegateWrap(traceCallback);
+        assert(p.handle);
+        sqlite3_trace(p.handle, &callback, p.traceCallback);
+    }
+
+    /++
+    Registers a delegate of type `ProfileCallbackDelegate` as the profile callback.
+
+    Any previously set profile or trace callback is released.
+    Pass `null` to disable the callback.
+
+    The string parameter that is passed to the callback is the SQL text of the statement being
+    executed. The time unit is defined in SQLite's documentation as nanoseconds (subject to change,
+    as the functionality is experimental).
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/profile.html).
+    +/
+    void setProfileCallback(ProfileCallbackDelegate profileCallback)
+    {
+        extern(C) static nothrow
+        void callback(void* ptr, const(char)* str, sqlite3_uint64 time)
+        {
+            auto dlg = delegateUnwrap!ProfileCallbackDelegate(ptr).dlg;
+            dlg(str.to!string, time);
+        }
+
+        free(p.profileCallback);
+        p.profileCallback = delegateWrap(profileCallback);
+        assert(p.handle);
+        sqlite3_profile(p.handle, &callback, p.profileCallback);
+    }
+
+    version (_UnlockNotify)
+    {
+        /++
+        Registers a `IUnlockNotifyHandler` used to handle database locks.
+
+        When running in shared-cache mode, a database operation may fail with an SQLITE_LOCKED error if
+        the required locks on the shared-cache or individual tables within the shared-cache cannot be obtained.
+        See SQLite Shared-Cache Mode for a description of shared-cache locking.
+        This API may be used to register a callback that SQLite will invoke when the connection currently
+        holding the required lock relinquishes it.
+        This API can be used only if the SQLite library was compiled with the `SQLITE_ENABLE_UNLOCK_NOTIFY`
+        C-preprocessor symbol defined.
+
+        See_Also: $(LINK http://sqlite.org/c3ref/unlock_notify.html).
+
+        Parameters:
+            unlockNotifyHandler - custom handler used to control the unlocking mechanism
+        +/
+        void setUnlockNotifyHandler(IUnlockNotifyHandler unlockNotifyHandler)
+        {
+            p.unlockNotifyHandler = unlockNotifyHandler;
+        }
+
+        /// Setup and waits for unlock notify using the provided `IUnlockNotifyHandler`
+        package (d2sqlite3) auto waitForUnlockNotify()
+        {
+            if (p.unlockNotifyHandler is null) return SQLITE_LOCKED;
+
+            version (SqliteEnableUnlockNotify)
+            {
+                extern(C) static nothrow
+                void callback(void** ntfPtr, int nPtr)
+                {
+                    for (int i=0; i<nPtr; i++)
+                    {
+                        auto handler = cast(IUnlockNotifyHandler*)ntfPtr[i];
+                        handler.emit(SQLITE_OK);
+                    }
+                }
+
+                int rc = sqlite3_unlock_notify(p.handle, &callback, &p.unlockNotifyHandler);
+                assert(rc==SQLITE_LOCKED || rc==SQLITE_OK);
+
+                /+ The call to sqlite3_unlock_notify() always returns either SQLITE_LOCKED or SQLITE_OK.
+
+                If SQLITE_LOCKED was returned, then the system is deadlocked. In this case this function
+                needs to return SQLITE_LOCKED to the caller so that the current transaction can be rolled
+                back. Otherwise, block until the unlock-notify callback is invoked, then return SQLITE_OK.
+                +/
+                if(rc == SQLITE_OK)
+                {
+                    p.unlockNotifyHandler.wait();
+                    scope (exit) p.unlockNotifyHandler.reset();
+                    return p.unlockNotifyHandler.result;
+                }
+                return rc;
+            }
+            else
+            {
+                p.unlockNotifyHandler.waitOne();
+                auto res = p.unlockNotifyHandler.result;
+                if (res != SQLITE_OK) p.unlockNotifyHandler.reset();
+                return res;
+            }
+        }
+    }
+}
+
+/// Delegate types
+alias UpdateHookDelegate = void delegate(int type, string dbName, string tableName, long rowid) nothrow;
+/// ditto
+alias CommitHookDelegate = int delegate() nothrow;
+/// ditto
+alias RoolbackHookDelegate = void delegate() nothrow;
+/// ditto
+alias ProgressHandlerDelegate = int delegate() nothrow;
+/// ditto
+alias TraceCallbackDelegate = void delegate(string sql) nothrow;
+/// ditto
+alias ProfileCallbackDelegate = void delegate(string sql, ulong time) nothrow;
+
+/// Information about a table column.
+struct TableColumnMetadata
+{
+    string declaredTypeName; ///
+    string collationSequenceName; ///
+    bool isNotNull; ///
+    bool isPrimaryKey; ///
+    bool isAutoIncrement; ///
+}
+
+version (_UnlockNotify)
+{
+    /++
+    UnlockNotifyHandler interface to be used for custom implementations of UnlockNotify pattern with SQLite.
+
+    Note:
+    For the C API sqlite3_unlock_notify to be used, this library must be compiled with
+    `-version=SqliteEnableUnlockNotify`.
+    Otherwise only emulated solution is provided, that is based on retries for the defined amount of time.
+
+    Implementation must be able to handle situation when emit is called sooner than the wait itself.
+
+    See_Also: $(LINK http://sqlite.org/c3ref/unlock_notify.html).
+    See_Also: $(LINK http://www.sqlite.org/unlock_notify.html).
+    +/
+    interface IUnlockNotifyHandler
+    {
+        version (SqliteEnableUnlockNotify)
+        {
+            /// Blocks until emit is called
+            void wait();
+
+            /++
+            Unlocks the handler.
+            This is called from registered callback from SQLite.
+
+            Params:
+                state = Value to set as a handler result. It can be SQLITE_LOCKED or SQLITE_OK.
+            +/
+            void emit(int state) nothrow;
+        }
+        else
+        {
+            /++
+            This is used as an alternative when SQLite is not compiled with SQLITE_ENABLE_UNLOCK_NOTIFY, and
+            when the library is built with `-version=SqliteFakeUnlockNotify`.
+            Using this, the handler tries to wait out the SQLITE_LOCKED state for some time.
+            Implementation have to block for some amount of time and check if total amount is not greater than some constant afterwards.
+            If there is still some time to try again, the handler must set the result to SQLITE_OK or to SQLITE_LOCKED otherwise.
+            +/
+            void waitOne();
+        }
+
+        /// Resets the handler for the next use
+        void reset();
+
+        /// Result after wait is finished
+        @property int result() const;
+    }
+
+    version (SqliteEnableUnlockNotify)
+    {
+        /++
+        UnlockNotifyHandler used when SQLite is compiled with SQLITE_ENABLE_UNLOCK_NOTIFY, and
+        when the library is built with `-version=SqliteEnableUnlockNotify`.
+        It is implemented using the standard `core.sync` package.
+
+        Use setUnlockNotifyHandler method to handle the database lock.
+
+        See_Also: $(LINK http://sqlite.org/c3ref/unlock_notify.html).
+        See_Also: $(LINK http://www.sqlite.org/unlock_notify.html).
+        +/
+        final class UnlockNotifyHandler : IUnlockNotifyHandler
+        {
+            import core.sync.condition : Condition;
+            import core.sync.mutex : Mutex;
+
+            private
+            {
+                __gshared Mutex mtx;
+                __gshared Condition cond;
+                __gshared int res;
+                __gshared bool fired;
+            }
+
+            /// Constructor
+            this()
+            {
+                mtx = new Mutex();
+                cond = new Condition(mtx);
+            }
+
+            /// Blocks until emit is called
+            void wait()
+            {
+                synchronized (mtx)
+                {
+                    if (!fired) cond.wait();
+                }
+            }
+
+            /// Unlocks the handler, state is one of SQLITE_LOCKED or SQLITE_OK
+            void emit(int res) nothrow
+            in { assert(res == SQLITE_LOCKED || res == SQLITE_OK); }
+            body
+            {
+                try
+                {
+                    synchronized (mtx)
+                    {
+                        this.res = res;
+                        fired = true;
+                        cond.notify();
+                    }
+                }
+                catch (Exception) {}
+            }
+
+            /// Resets the handler for the next use
+            void reset()
+            {
+                res = SQLITE_LOCKED;
+                fired = false;
+            }
+
+            /// Result after wait is finished
+            @property int result() const
+            out (result) { assert(result == SQLITE_OK || result == SQLITE_LOCKED); }
+            body { return res; }
+        }
+    }
+    else
+    {
+        /++
+        UnlockNotifyHandler that can be used when SQLite is not compiled with SQLITE_ENABLE_UNLOCK_NOTIFY,
+        and when the library is built with `-version=SqliteFakeUnlockNotify`..
+        It retries the statement execution for the provided amount of time before the SQLITE_LOCKED is returned.
+
+        Use setUnlockNotifyHandler method to handle the database lock.
+
+        See_Also: $(LINK http://sqlite.org/c3ref/unlock_notify.html).
+        See_Also: $(LINK http://www.sqlite.org/unlock_notify.html).
+        +/
+        final class UnlockNotifyHandler : IUnlockNotifyHandler
+        {
+            import core.time : Duration, msecs;
+            import std.datetime.stopwatch : StopWatch;
+
+            private
+            {
+                int res;
+                Duration maxDuration;
+                StopWatch sw;
+            }
+
+            /// Constructor
+            this(Duration max = 1000.msecs)
+            in { assert(max > Duration.zero); }
+            body
+            {
+                maxDuration = max;
+            }
+
+            /// Blocks for some time to retry the statement
+            void waitOne()
+            {
+                import core.thread : Thread;
+                import std.random : uniform;
+
+                if (!sw.running) sw.start;
+
+                Thread.sleep(uniform(50, 100).msecs);
+
+                if (sw.peek > maxDuration)
+                {
+                    sw.stop;
+                    res = SQLITE_LOCKED;
+                }
+                else res = SQLITE_OK;
+            }
+
+            /// Resets the handler for the next use
+            void reset()
+            {
+                res = SQLITE_LOCKED;
+                sw.reset();
+            }
+
+            /// Result after wait is finished
+            @property int result() const
+            out (result) { assert(result == SQLITE_OK || result == SQLITE_LOCKED); }
+            body
+            {
+                return res;
+            }
+        }
+    }
+
+    unittest
+    {
+        import core.time : Duration, msecs;
+
+        /++
+        Tests the unlock notify facility.
+        Params:
+            delay - time to wait in the transaction to block the other one
+            expected - expected result (can be used to test timeout when fake unlock notify is used)
+        +/
+        void testUnlockNotify(Duration delay = 500.msecs, int expected = 3)
+        {
+            import core.thread : Thread;
+            import core.time : msecs, seconds;
+            import std.concurrency : spawn;
+
+            static void test(int n, Duration delay)
+            {
+                auto db = Database("file::memory:?cache=shared", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_URI | SQLITE_OPEN_MEMORY);
+                db.setUnlockNotifyHandler = new UnlockNotifyHandler();
+                db.execute("BEGIN IMMEDIATE");
+                Thread.sleep(delay);
+                db.execute("INSERT INTO foo (bar) VALUES (?)", n);
+                db.commit();
+            }
+
+            auto db = Database("file::memory:?cache=shared", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_URI | SQLITE_OPEN_MEMORY);
+            db.execute(`CREATE TABLE foo (bar INTEGER);`);
+
+            spawn(&test, 1, delay);
+            Thread.sleep(100.msecs);
+            spawn(&test, 2, delay);
+            Thread.sleep(2*delay + 100.msecs);
+            assert(db.execute("SELECT sum(bar) FROM foo").oneValue!int == expected, format!"%s != %s"(db.execute("SELECT sum(bar) FROM foo").oneValue!int, expected));
+        }
+
+        testUnlockNotify();
+        version (SqliteFakeUnlockNotify) testUnlockNotify(1500.msecs, 1); //timeout test
+    }
+}
+
+/++
+Exception thrown when SQLite functions return an error.
++/
+class SqliteException : Exception
+{
+    /++
+    The _code of the error that raised the exception
+    +/
+    int code;
+
+    /++
+    The SQL code that raised the exception, if applicable.
+    +/
+    string sql;
+
+    private this(string msg, string sql, int code,
+                 string file = __FILE__, size_t line = __LINE__, Throwable next = null)
+        @safe pure nothrow @nogc
+    {
+        this.sql = sql;
+        this.code = code;
+        super(msg, file, line, next);
+    }
+
+package(d2sqlite3):
+    this(string msg, int code, string sql = null,
+         string file = __FILE__, size_t line = __LINE__, Throwable next = null)
+         @safe pure nothrow
+    {
+        this(text("error ", code, ": ", msg), sql, code, file, line, next);
+    }
+}
diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/internal/memory.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/internal/memory.d
new file mode 100644
index 0000000..664dbdd
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/internal/memory.d
@@ -0,0 +1,87 @@
+/+
+This module is part of d2sqlite3.
+
+Authors:
+    Nicolas Sicard (biozic) and other contributors at $(LINK https://github.com/biozic/d2sqlite3)
+
+Copyright:
+    Copyright 2011-18 Nicolas Sicard.
+
+License:
+    $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
++/
+module d2sqlite3.internal.memory;
+
+import std.traits : isFunctionPointer, isDelegate, isCallable;
+import core.memory : GC;
+import core.stdc.stdlib : malloc, free;
+
+package(d2sqlite3):
+
+struct WrappedDelegate(T)
+{
+    T dlg;
+    string name;
+}
+
+void* delegateWrap(T)(T dlg, string name = null) nothrow
+    if (isFunctionPointer!T || isDelegate!T)
+{
+    import std.functional : toDelegate;
+
+    if (dlg is null)
+        return null;
+
+    alias D = typeof(toDelegate(dlg));
+    auto d = cast(WrappedDelegate!D*) malloc(WrappedDelegate!D.sizeof);
+    d.dlg = toDelegate(dlg);
+    d.name = name;
+    return cast(void*) d;
+}
+
+WrappedDelegate!T* delegateUnwrap(T)(void* ptr) nothrow
+    if (isCallable!T)
+{
+    return cast(WrappedDelegate!T*) ptr;
+}
+
+// Anchors and returns a pointer to D memory, so that it will not
+// be moved or collected. For use with releaseMem.
+inout(void)* anchorMem(inout(void)* ptr)
+{
+    GC.addRoot(ptr);
+    // Cast to work around https://issues.dlang.org/show_bug.cgi?id=21484
+    GC.setAttr(cast(void*) ptr, GC.BlkAttr.NO_MOVE);
+    return ptr;
+}
+
+// Passed to sqlite3_xxx_blob64/sqlite3_xxx_text64 to unanchor memory.
+extern(C) void releaseMem(const void* ptr)
+{
+    // Cast to work around https://issues.dlang.org/show_bug.cgi?id=21484
+    GC.setAttr(cast(void*) ptr, GC.BlkAttr.NO_MOVE);
+    GC.removeRoot(ptr);
+}
+
+// Adapted from https://p0nce.github.io/d-idioms/#GC-proof-resource-class
+void ensureNotInGC(T)(string info = null) nothrow
+{
+    import core.exception : InvalidMemoryOperationError;
+    try
+    {
+        import core.memory : GC;
+        cast(void) GC.malloc(1);
+        return;
+    }
+    catch(InvalidMemoryOperationError e)
+    {
+        import core.stdc.stdio : fprintf, stderr;
+        import core.stdc.stdlib : exit;
+        fprintf(stderr,
+                "Error: clean-up of %s incorrectly depends on destructors called by the GC.\n",
+                T.stringof.ptr);
+        if (info)
+            fprintf(stderr, "Info: %s\n", info.ptr);
+        assert(false);
+    }
+}
diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/internal/util.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/internal/util.d
new file mode 100644
index 0000000..3efd351
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/internal/util.d
@@ -0,0 +1,211 @@
+/+
+This module is part of d2sqlite3.
+
+Authors:
+    Nicolas Sicard (biozic) and other contributors at $(LINK https://github.com/biozic/d2sqlite3)
+
+Copyright:
+    Copyright 2011-18 Nicolas Sicard.
+
+License:
+    $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
++/
+module d2sqlite3.internal.util;
+
+import std.traits : isBoolean, isIntegral, isFloatingPoint, isSomeString,
+    isArray, isStaticArray, isDynamicArray;
+import std.typecons : Nullable;
+import d2sqlite3.sqlite3;
+import d2sqlite3.internal.memory;
+
+package(d2sqlite3):
+
+string errmsg(sqlite3* db) nothrow
+{
+    import std.conv : to;
+    return sqlite3_errmsg(db).to!string;
+}
+
+string errmsg(sqlite3_stmt* stmt) nothrow
+{
+    return errmsg(sqlite3_db_handle(stmt));
+}
+
+auto byStatement(string sql)
+{
+    static struct ByStatement
+    {
+        string sql;
+        size_t end;
+
+        this(string sql)
+        {
+            this.sql = sql;
+            end = findEnd();
+        }
+
+        bool empty() const @safe pure nothrow @nogc
+        {
+            return !sql.length;
+        }
+
+        string front() const @safe pure nothrow @nogc
+        {
+            return sql[0 .. end];
+        }
+
+        void popFront()
+        {
+            sql = sql[end .. $];
+            end = findEnd();
+        }
+
+    private:
+        size_t findEnd()
+        {
+            import std.algorithm : countUntil;
+            import std.string : toStringz;
+            import std.utf : byCodeUnit;
+
+            size_t pos;
+            bool complete;
+            do
+            {
+                auto tail = sql[pos .. $];
+                immutable offset = tail.byCodeUnit.countUntil(';') + 1;
+                pos += offset;
+                if (offset == 0)
+                    pos = sql.length;
+                auto part = sql[0 .. pos];
+                complete = cast(bool) sqlite3_complete(part.toStringz);
+            }
+            while (!complete && pos < sql.length);
+            return pos;
+        }
+    }
+
+    return ByStatement(sql);
+}
+unittest
+{
+    import std.algorithm : equal, map;
+    import std.string : strip;
+
+    auto sql = "CREATE TABLE test (dummy);
+        CREATE TRIGGER trig INSERT ON test BEGIN SELECT 1; SELECT 'a;b'; END;
+        SELECT 'c;d';;
+        CREATE";
+    assert(equal(sql.byStatement.map!(s => s.strip), [
+        "CREATE TABLE test (dummy);",
+        "CREATE TRIGGER trig INSERT ON test BEGIN SELECT 1; SELECT 'a;b'; END;",
+        "SELECT 'c;d';",
+        ";",
+        "CREATE"
+    ]));
+}
+
+// getValue and setResult function templates
+// used by createFunction and createAggregate
+
+auto getValue(T)(sqlite3_value* argv)
+    if (isBoolean!T)
+{
+    return sqlite3_value_int64(argv) != 0;
+}
+
+auto getValue(T)(sqlite3_value* argv)
+    if (isIntegral!T)
+{
+    import std.conv : to;
+    return sqlite3_value_int64(argv).to!T;
+}
+
+auto getValue(T)(sqlite3_value* argv)
+    if (isFloatingPoint!T)
+{
+    import std.conv : to;
+    if (sqlite3_value_type(argv) == SQLITE_NULL)
+        return double.nan;
+    return sqlite3_value_double(argv).to!T;
+}
+
+auto getValue(T)(sqlite3_value* argv)
+    if (isSomeString!T)
+{
+    import std.conv : to;
+    return (cast(const(char)*) sqlite3_value_text(argv)).to!T;
+}
+
+auto getValue(T)(sqlite3_value* argv)
+    if (isArray!T && !isSomeString!T)
+{
+    import std.conv : to;
+    import core.stdc.string : memcpy;
+
+    auto n = sqlite3_value_bytes(argv);
+    ubyte[] blob;
+    blob.length = n;
+    memcpy(blob.ptr, sqlite3_value_blob(argv), n);
+    return cast(T) blob;
+}
+
+auto getValue(T : Nullable!U, U...)(sqlite3_value* argv)
+{
+    if (sqlite3_value_type(argv) == SQLITE_NULL)
+        return T.init;
+    return T(getValue!(U[0])(argv));
+}
+
+void setResult(T)(sqlite3_context* context, T value)
+    if (isIntegral!T || isBoolean!T)
+{
+    import std.conv : to;
+    sqlite3_result_int64(context, value.to!long);
+}
+
+void setResult(T)(sqlite3_context* context, T value)
+    if (isFloatingPoint!T)
+{
+    import std.conv : to;
+    sqlite3_result_double(context, value.to!double);
+}
+
+void setResult(T)(sqlite3_context* context, T value)
+    if (isSomeString!T)
+{
+    import std.conv : to;
+    auto val = value.to!string;
+    sqlite3_result_text64(context, cast(const(char)*) anchorMem(cast(void*) val.ptr),
+        val.length, &releaseMem, SQLITE_UTF8);
+}
+
+void setResult(T)(sqlite3_context* context, T value)
+    if (isDynamicArray!T && !isSomeString!T)
+{
+    auto val = cast(void[]) value;
+    sqlite3_result_blob64(context, anchorMem(val.ptr), val.length, &releaseMem);
+}
+
+void setResult(T)(sqlite3_context* context, T value)
+    if (isStaticArray!T)
+{
+    auto val = cast(void[]) value;
+    sqlite3_result_blob64(context, val.ptr, val.sizeof, SQLITE_TRANSIENT);
+}
+
+void setResult(T : Nullable!U, U...)(sqlite3_context* context, T value)
+{
+    if (value.isNull)
+        sqlite3_result_null(context);
+    else
+        setResult(context, value.get);
+}
+
+string nothrowFormat(Args...)(string fmt, Args args) nothrow
+{
+    import std.string : format;
+    try
+        return fmt.format(args);
+    catch (Exception e)
+        throw new Error("Error: " ~ e.msg);
+}
diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/library.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/library.d
new file mode 100644
index 0000000..400904e
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/library.d
@@ -0,0 +1,107 @@
+/++
+Miscellaneous SQLite3 library functions.
+
+Authors:
+    Nicolas Sicard (biozic) and other contributors at $(LINK https://github.com/biozic/d2sqlite3)
+
+Copyright:
+    Copyright 2011-18 Nicolas Sicard.
+
+License:
+    $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
++/
+module d2sqlite3.library;
+
+import d2sqlite3.sqlite3;
+import d2sqlite3.database : SqliteException;
+import std.exception : enforce;
+import std.string : format;
+
+/++
+Gets the library's version string (e.g. "3.8.7"), version number (e.g. 3_008_007)
+or source ID.
+
+These values are returned by the linked SQLite C library. They can be checked against
+the values of the enums defined by the `d2sqlite3` package (`SQLITE_VERSION`,
+`SQLITE_VERSION_NUMBER` and `SQLITE_SOURCE_ID`).
+
+See_Also: $(LINK http://www.sqlite.org/c3ref/libversion.html).
++/
+string versionString()
+{
+    import std.conv : to;
+    return sqlite3_libversion().to!string;
+}
+
+/// Ditto
+int versionNumber() nothrow
+{
+    return sqlite3_libversion_number();
+}
+
+/// Ditto
+string sourceID()
+{
+    import std.conv : to;
+    return sqlite3_sourceid().to!string;
+}
+
+/++
+Tells whether SQLite was compiled with the thread-safe options.
+
+See_also: $(LINK http://www.sqlite.org/c3ref/threadsafe.html).
++/
+bool threadSafe() nothrow
+{
+    return cast(bool) sqlite3_threadsafe();
+}
+
+/++
+Manually initializes (or shuts down) SQLite.
+
+SQLite initializes itself automatically on the first request execution, so this
+usually wouldn't be called. Use for instance before a call to config().
++/
+void initialize()
+{
+    immutable result = sqlite3_initialize();
+    enforce(result == SQLITE_OK, new SqliteException("Initialization: error %s".format(result), result));
+}
+/// Ditto
+void shutdown()
+{
+    immutable result = sqlite3_shutdown();
+    enforce(result == SQLITE_OK, new SqliteException("Shutdown: error %s".format(result), result));
+}
+
+/++
+Sets a configuration option.
+
+Use before initialization, e.g. before the first
+call to initialize and before execution of the first statement.
+
+See_Also: $(LINK http://www.sqlite.org/c3ref/config.html).
++/
+void config(Args...)(int code, Args args)
+{
+    immutable result = sqlite3_config(code, args);
+    enforce(result == SQLITE_OK, new SqliteException("Configuration: error %s".format(result), result));
+}
+
+/++
+Tests if an SQLite compile option is set
+
+See_Also: $(LINK http://sqlite.org/c3ref/compileoption_get.html).
++/
+bool isCompiledWith(string option)
+{
+    import std.string : toStringz;
+    return cast(bool) sqlite3_compileoption_used(option.toStringz);
+}
+///
+version (SqliteEnableUnlockNotify)
+unittest
+{
+    assert(isCompiledWith("SQLITE_ENABLE_UNLOCK_NOTIFY"));
+    assert(!isCompiledWith("SQLITE_UNKNOWN_COMPILE_OPTION"));
+}
diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/package.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/package.d
new file mode 100644
index 0000000..a47730a
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/package.d
@@ -0,0 +1,111 @@
+/++
+D2SQLite3 provides a thin and convenient wrapper around the SQLite C API.
+
+Features:
+$(UL
+    $(LI Use reference-counted structs (`Database`, `Statement`) instead of SQLite objects
+    pointers.)
+    $(LI Run multistatement SQL code with `Database.run()`.)
+    $(LI Use built-in integral types, floating point types, `string`, `immutable(ubyte)[]` and
+    `Nullable` types directly: conversions to and from SQLite types is automatic and GC-safe.)
+    $(LI Bind multiple values to a prepare statement with `Statement.bindAll()` or
+    `Statement.inject()`. It's also possible to bind the fields of a struct automatically with
+    `Statement.inject()`.)
+    $(LI Handle the results of a query as a range of `Row`s, and the columns of a row
+    as a range of `ColumnData` (equivalent of a `Variant` fit for SQLite types).)
+    $(LI Access the data in a result row directly, by index or by name,
+    with the `Row.peek!T()` methods.)
+    $(LI Make a struct out of the data of a row with `Row.as!T()`.)
+    $(LI Register D functions as SQLite callbacks, with `Database.setUpdateHook()` $(I et al).)
+    $(LI Create new SQLite functions, aggregates or collations out of D functions or delegate,
+    with automatic type converions, with `Database.createFunction()` $(I et al).)
+    $(LI Store all the rows and columns resulting from a query at once with the `cached` function
+    (sometimes useful even if not memory-friendly...).)
+    $(LI Use an unlock notification when two or more connections access the same database in
+    shared-cache mode, either using SQLite's dedicated API (sqlite_unlock_notify) or using an
+    emulated equivalent.)
+)
+
+Authors:
+    Nicolas Sicard (biozic) and other contributors at $(LINK https://github.com/biozic/d2sqlite3)
+
+Copyright:
+    Copyright 2011-18 Nicolas Sicard.
+
+License:
+    $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
++/
+module d2sqlite3;
+
+public import d2sqlite3.library;
+public import d2sqlite3.database;
+public import d2sqlite3.statement;
+public import d2sqlite3.results;
+public import d2sqlite3.sqlite3;
+
+///
+unittest // Documentation example
+{
+    // Note: exception handling is left aside for clarity.
+    import d2sqlite3;
+    import std.typecons : Nullable;
+
+    // Open a database in memory.
+    auto db = Database(":memory:");
+
+    // Create a table
+    db.run("DROP TABLE IF EXISTS person;
+            CREATE TABLE person (
+              id    INTEGER PRIMARY KEY,
+              name  TEXT NOT NULL,
+              score FLOAT
+            )");
+
+    // Prepare an INSERT statement
+    Statement statement = db.prepare(
+        "INSERT INTO person (name, score)
+         VALUES (:name, :score)"
+    );
+
+    // Bind values one by one (by parameter name or index)
+    statement.bind(":name", "John");
+    statement.bind(2, 77.5);
+    statement.execute();
+    statement.reset(); // Need to reset the statement after execution.
+
+    // Bind muliple values at the same time
+    statement.bindAll("John", null);
+    statement.execute();
+    statement.reset();
+
+    // Bind, execute and reset in one call
+    statement.inject("Clara", 88.1);
+
+    // Count the changes
+    assert(db.totalChanges == 3);
+
+    // Count the Johns in the table.
+    auto count = db.execute("SELECT count(*) FROM person WHERE name == 'John'")
+                   .oneValue!long;
+    assert(count == 2);
+
+    // Read the data from the table lazily
+    ResultRange results = db.execute("SELECT * FROM person");
+    foreach (Row row; results)
+    {
+        // Retrieve "id", which is the column at index 0, and contains an int,
+        // e.g. using the peek function (best performance).
+        auto id = row.peek!long(0);
+
+        // Retrieve "name", e.g. using opIndex(string), which returns a ColumnData.
+        auto name = row["name"].as!string;
+
+        // Retrieve "score", which is at index 2, e.g. using the peek function,
+        // using a Nullable type
+        auto score = row.peek!(Nullable!double)(2);
+        if (!score.isNull)
+        {
+            // ...
+        }
+    }
+}
diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/results.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/results.d
new file mode 100644
index 0000000..5b1dadf
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/results.d
@@ -0,0 +1,874 @@
+/++
+Managing query results.
+
+Authors:
+    Nicolas Sicard (biozic) and other contributors at $(LINK https://github.com/biozic/d2sqlite3)
+
+Copyright:
+    Copyright 2011-18 Nicolas Sicard.
+
+License:
+    $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
++/
+module d2sqlite3.results;
+
+import d2sqlite3.database;
+import d2sqlite3.statement;
+import d2sqlite3.sqlite3;
+import d2sqlite3.internal.util;
+
+import std.conv : to;
+import std.exception : enforce;
+import std.string : format;
+import std.typecons : Nullable;
+
+/// Set _UnlockNotify version if compiled with SqliteEnableUnlockNotify or SqliteFakeUnlockNotify
+version (SqliteEnableUnlockNotify) version = _UnlockNotify;
+else version (SqliteFakeUnlockNotify) version = _UnlockNotify;
+
+/++
+An input range interface to access the rows resulting from an SQL query.
+
+The elements of the range are `Row` structs. A `Row` is just a view of the current
+row when iterating the results of a `ResultRange`. It becomes invalid as soon as
+`ResultRange.popFront()` is called (it contains undefined data afterwards). Use
+`cached` to store the content of rows past the execution of the statement.
+
+Instances of this struct are typically returned by `Database.execute()` or
+`Statement.execute()`.
++/
+struct ResultRange
+{
+private:
+    Statement statement;
+    int state = SQLITE_DONE;
+    int colCount = 0;
+    Row current;
+
+package(d2sqlite3):
+    this(Statement statement)
+    {
+        if (!statement.empty)
+        {
+            version (_UnlockNotify) state = sqlite3_blocking_step(statement);
+            else state = sqlite3_step(statement.handle);
+        }
+        else
+            state = SQLITE_DONE;
+
+        enforce(state == SQLITE_ROW || state == SQLITE_DONE,
+                new SqliteException(errmsg(statement.handle), state));
+
+        this.statement = statement;
+        colCount = sqlite3_column_count(statement.handle);
+        current = Row(statement, colCount);
+    }
+
+    version (_UnlockNotify)
+    {
+        auto sqlite3_blocking_step(Statement statement)
+        {
+            int rc;
+            while(SQLITE_LOCKED == (rc = sqlite3_step(statement.handle)))
+            {
+                rc = statement.waitForUnlockNotify();
+                if(rc != SQLITE_OK) break;
+                sqlite3_reset(statement.handle);
+            }
+            return rc;
+        }
+    }
+
+public:
+    /++
+    Range interface.
+    +/
+    bool empty() @property
+    {
+        return state == SQLITE_DONE;
+    }
+
+    /// ditto
+    ref Row front() return @property
+    {
+        assert(!empty, "no rows available");
+        return current;
+    }
+
+    /// ditto
+    void popFront()
+    {
+        assert(!empty, "no rows available");
+        version (_UnlockNotify) state = sqlite3_blocking_step(statement);
+        else state = sqlite3_step(statement.handle);
+        current = Row(statement, colCount);
+        enforce(state == SQLITE_DONE || state == SQLITE_ROW,
+            new SqliteException(errmsg(statement.handle), state));
+    }
+
+    /++
+    Gets only the first value of the first row returned by the execution of the statement.
+    +/
+    auto oneValue(T)()
+    {
+        return front.peek!T(0);
+    }
+    ///
+    unittest
+    {
+        auto db = Database(":memory:");
+        db.execute("CREATE TABLE test (val INTEGER)");
+        auto count = db.execute("SELECT count(*) FROM test").oneValue!long;
+        assert(count == 0);
+    }
+}
+///
+unittest
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (i INTEGER);
+            INSERT INTO test VALUES (1);
+            INSERT INTO test VALUES (2);");
+
+    auto results = db.execute("SELECT * FROM test");
+    assert(!results.empty);
+    assert(results.front.peek!long(0) == 1);
+    results.popFront();
+    assert(!results.empty);
+    assert(results.front.peek!long(0) == 2);
+    results.popFront();
+    assert(results.empty);
+}
+
+/++
+A row returned when stepping over an SQLite prepared statement.
+
+The data of each column can be retrieved:
+$(UL
+    $(LI using Row as a random-access range of ColumnData.)
+    $(LI using the more direct peek functions.)
+)
+
+Warning:
+    The data of the row is invalid when the next row is accessed (after a call to
+    `ResultRange.popFront()`).
++/
+struct Row
+{
+    import std.traits : isBoolean, isIntegral, isSomeChar, isFloatingPoint, isSomeString, isArray;
+    import std.traits : isInstanceOf, TemplateArgsOf;
+
+private:
+    Statement statement;
+    int frontIndex = 0;
+    int backIndex = -1;
+
+    this(Statement statement, int colCount) nothrow
+    {
+        this.statement = statement;
+        backIndex = colCount - 1;
+    }
+
+public:
+    /// Range interface.
+    bool empty() const @property nothrow
+    {
+        return length == 0;
+    }
+
+    /// ditto
+    ColumnData front() @property
+    {
+        assertInitialized();
+        return opIndex(0);
+    }
+
+    /// ditto
+    void popFront() nothrow
+    {
+        assertInitialized();
+        frontIndex++;
+    }
+
+    /// ditto
+    Row save() @property
+    {
+        return this;
+    }
+
+    /// ditto
+    ColumnData back() @property
+    {
+        assertInitialized();
+        return opIndex(backIndex - frontIndex);
+    }
+
+    /// ditto
+    void popBack() nothrow
+    {
+        assertInitialized();
+        backIndex--;
+    }
+
+    /// ditto
+    size_t length() const @property nothrow
+    {
+        return backIndex - frontIndex + 1;
+    }
+
+    /// ditto
+    ColumnData opIndex(size_t index)
+    {
+        assertInitialized();
+        auto i = internalIndex(index);
+        auto type = sqlite3_column_type(statement.handle, i);
+        final switch (type)
+        {
+            case SqliteType.INTEGER:
+                return ColumnData(peek!long(index));
+
+            case SqliteType.FLOAT:
+                return ColumnData(peek!double(index));
+
+            case SqliteType.TEXT:
+                return ColumnData(peek!string(index));
+
+            case SqliteType.BLOB:
+                return ColumnData(peek!(Blob, PeekMode.copy)(index));
+
+            case SqliteType.NULL:
+                return ColumnData(null);
+        }
+    }
+
+    /// Ditto
+    ColumnData opIndex(string columnName)
+    {
+        return opIndex(indexForName(columnName));
+    }
+
+    /++
+    Returns the data of a column directly.
+
+    Contrary to `opIndex`, the `peek` functions return the data directly, automatically cast to T,
+    without the overhead of using a wrapping type (`ColumnData`).
+
+    When using `peek` to retrieve an array or a string, you can use either:
+        $(UL
+            $(LI `peek!(..., PeekMode.copy)(index)`,
+              in which case the function returns a copy of the data that will outlive the step
+              to the next row,
+            or)
+            $(LI `peek!(..., PeekMode.slice)(index)`,
+              in which case a slice of SQLite's internal buffer is returned (see Warnings).)
+        )
+
+    Params:
+        T = The type of the returned data. T must be a boolean, a built-in numeric type, a
+        string, an array or a `Nullable`.
+        $(TABLE
+            $(TR
+                $(TH Condition on T)
+                $(TH Requested database type)
+            )
+            $(TR
+                $(TD `isIntegral!T || isBoolean!T`)
+                $(TD INTEGER)
+            )
+            $(TR
+                $(TD `isFloatingPoint!T`)
+                $(TD FLOAT)
+            )
+            $(TR
+                $(TD `isSomeString!T`)
+                $(TD TEXT)
+            )
+            $(TR
+                $(TD `isArray!T`)
+                $(TD BLOB)
+            )
+            $(TR
+                $(TD `is(T == Nullable!U, U...)`)
+                $(TD NULL or U)
+            )
+        )
+
+        index = The index of the column in the prepared statement or
+        the name of the column, as specified in the prepared statement
+        with an AS clause. The index of the first column is 0.
+
+    Returns:
+        A value of type T. The returned value results from SQLite's own conversion rules:
+        see $(LINK http://www.sqlite.org/c3ref/column_blob.html) and
+        $(LINK http://www.sqlite.org/lang_expr.html#castexpr). It's then converted
+        to T using `std.conv.to!T`.
+
+    Warnings:
+        When using `PeekMode.slice`, the data of the slice will be $(B invalidated)
+        when the next row is accessed. A copy of the data has to be made somehow for it to
+        outlive the next step on the same statement.
+
+        When using referring to the column by name, the names of all the columns are
+        tested each time this function is called: use
+        numeric indexing for better performance.
+    +/
+    T peek(T)(size_t index)
+        if (isBoolean!T || isIntegral!T || isSomeChar!T)
+    {
+        assertInitialized();
+        return sqlite3_column_int64(statement.handle, internalIndex(index)).to!T;
+    }
+
+    /// ditto
+    T peek(T)(size_t index)
+        if (isFloatingPoint!T)
+    {
+        assertInitialized();
+        return sqlite3_column_double(statement.handle, internalIndex(index)).to!T;
+    }
+
+    /// ditto
+    T peek(T, PeekMode mode = PeekMode.copy)(size_t index)
+        if (isSomeString!T)
+    {
+        import core.stdc.string : strlen, memcpy;
+
+        assertInitialized();
+        auto i = internalIndex(index);
+        auto str = cast(const(char)*) sqlite3_column_text(statement.handle, i);
+
+        if (str is null)
+            return null;
+
+        auto length = strlen(str);
+        static if (mode == PeekMode.copy)
+        {
+            char[] text;
+            text.length = length;
+            memcpy(text.ptr, str, length);
+            return text.to!T;
+        }
+        else static if (mode == PeekMode.slice)
+            return cast(T) str[0..length];
+        else
+            static assert(false);
+    }
+
+    /// ditto
+    T peek(T, PeekMode mode = PeekMode.copy)(size_t index)
+        if (isArray!T && !isSomeString!T)
+    {
+        assertInitialized();
+        auto i = internalIndex(index);
+        auto ptr = sqlite3_column_blob(statement.handle, i);
+        auto length = sqlite3_column_bytes(statement.handle, i);
+        static if (mode == PeekMode.copy)
+        {
+            import core.stdc.string : memcpy;
+            ubyte[] blob;
+            blob.length = length;
+            memcpy(blob.ptr, ptr, length);
+            return cast(T) blob;
+        }
+        else static if (mode == PeekMode.slice)
+            return cast(T) ptr[0..length];
+        else
+            static assert(false);
+    }
+
+    /// ditto
+    T peek(T)(size_t index)
+        if (isInstanceOf!(Nullable, T)
+            && !isArray!(TemplateArgsOf!T[0]) && !isSomeString!(TemplateArgsOf!T[0]))
+    {
+        assertInitialized();
+        alias U = TemplateArgsOf!T[0];
+        if (sqlite3_column_type(statement.handle, internalIndex(index)) == SqliteType.NULL)
+            return T.init;
+        return T(peek!U(index));
+    }
+
+    /// ditto
+    T peek(T, PeekMode mode = PeekMode.copy)(size_t index)
+        if (isInstanceOf!(Nullable, T)
+            && (isArray!(TemplateArgsOf!T[0]) || isSomeString!(TemplateArgsOf!T[0])))
+    {
+        assertInitialized();
+        alias U = TemplateArgsOf!T[0];
+        if (sqlite3_column_type(statement.handle, internalIndex(index)) == SqliteType.NULL)
+            return T.init;
+        return T(peek!(U, mode)(index));
+    }
+
+    /// ditto
+    T peek(T)(string columnName)
+    {
+        return peek!T(indexForName(columnName));
+    }
+
+    /++
+    Determines the type of the data in a particular column.
+
+    `columnType` returns the type of the actual data in that column, whereas
+    `columnDeclaredTypeName` returns the name of the type as declared in the SELECT statement.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/column_blob.html) and
+    $(LINK http://www.sqlite.org/c3ref/column_decltype.html).
+    +/
+    SqliteType columnType(size_t index)
+    {
+        assertInitialized();
+        return cast(SqliteType) sqlite3_column_type(statement.handle, internalIndex(index));
+    }
+    /// Ditto
+    SqliteType columnType(string columnName)
+    {
+        return columnType(indexForName(columnName));
+    }
+    /// Ditto
+    string columnDeclaredTypeName(size_t index)
+    {
+        assertInitialized();
+        return sqlite3_column_decltype(statement.handle, internalIndex(index)).to!string;
+    }
+    /// Ditto
+    string columnDeclaredTypeName(string columnName)
+    {
+        return columnDeclaredTypeName(indexForName(columnName));
+    }
+    ///
+    unittest
+    {
+        auto db = Database(":memory:");
+        db.run("CREATE TABLE items (name TEXT, price REAL);
+                INSERT INTO items VALUES ('car', 20000);
+                INSERT INTO items VALUES ('air', 'free');");
+
+        auto results = db.execute("SELECT name, price FROM items");
+
+        auto row = results.front;
+        assert(row.columnType(0) == SqliteType.TEXT);
+        assert(row.columnType("price") == SqliteType.FLOAT);
+        assert(row.columnDeclaredTypeName(0) == "TEXT");
+        assert(row.columnDeclaredTypeName("price") == "REAL");
+
+        results.popFront();
+        row = results.front;
+        assert(row.columnType(0) == SqliteType.TEXT);
+        assert(row.columnType("price") == SqliteType.TEXT);
+        assert(row.columnDeclaredTypeName(0) == "TEXT");
+        assert(row.columnDeclaredTypeName("price") == "REAL");
+    }
+
+    /++
+    Determines the name of a particular column.
+
+    See_Also: $(LINK http://www.sqlite.org/c3ref/column_name.html).
+    +/
+    string columnName(size_t index)
+    {
+        assertInitialized();
+        return sqlite3_column_name(statement.handle, internalIndex(index)).to!string;
+    }
+    ///
+    unittest
+    {
+        auto db = Database(":memory:");
+        db.run("CREATE TABLE items (name TEXT, price REAL);
+                INSERT INTO items VALUES ('car', 20000);");
+
+        auto row = db.execute("SELECT name, price FROM items").front;
+        assert(row.columnName(1) == "price");
+    }
+
+    version (SqliteEnableColumnMetadata)
+    {
+        /++
+        Determines the name of the database, table, or column that is the origin of a
+        particular result column in SELECT statement.
+
+        Warning:
+        These methods are defined only when this library is compiled with
+        `-version=SqliteEnableColumnMetadata`, and SQLite compiled with the
+        `SQLITE_ENABLE_COLUMN_METADATA` option defined.
+
+        See_Also: $(LINK http://www.sqlite.org/c3ref/column_database_name.html).
+        +/
+        string columnDatabaseName(size_t index)
+        {
+            assertInitialized();
+            return sqlite3_column_database_name(statement.handle, internalIndex(index)).to!string;
+        }
+        /// Ditto
+        string columnDatabaseName(string columnName)
+        {
+            return columnDatabaseName(indexForName(columnName));
+        }
+        /// Ditto
+        string columnTableName(size_t index)
+        {
+            assertInitialized();
+            return sqlite3_column_database_name(statement.handle, internalIndex(index)).to!string;
+        }
+        /// Ditto
+        string columnTableName(string columnName)
+        {
+            return columnTableName(indexForName(columnName));
+        }
+        /// Ditto
+        string columnOriginName(size_t index)
+        {
+            assertInitialized();
+            return sqlite3_column_origin_name(statement.handle, internalIndex(index)).to!string;
+        }
+        /// Ditto
+        string columnOriginName(string columnName)
+        {
+            return columnOriginName(indexForName(columnName));
+        }
+    }
+
+    /++
+    Returns a struct with field members populated from the row's data.
+
+    Neither the names of the fields nor the names of the columns are checked. The fields
+    are filled with the columns' data in order. Thus, the order of the struct members must be the
+    same as the order of the columns in the prepared statement.
+
+    SQLite's conversion rules will be used. For instance, if a string field has the same rank
+    as an INTEGER column, the field's data will be the string representation of the integer.
+    +/
+    T as(T)()
+        if (is(T == struct))
+    {
+        import std.traits : FieldTypeTuple, FieldNameTuple;
+
+        alias FieldTypes = FieldTypeTuple!T;
+        T obj;
+        foreach (i, fieldName; FieldNameTuple!T)
+            __traits(getMember, obj, fieldName) = peek!(FieldTypes[i])(i);
+        return obj;
+    }
+    ///
+    unittest
+    {
+        struct Item
+        {
+            int _id;
+            string name;
+        }
+
+        auto db = Database(":memory:");
+        db.run("CREATE TABLE items (name TEXT);
+                INSERT INTO items VALUES ('Light bulb')");
+
+        auto results = db.execute("SELECT rowid AS id, name FROM items");
+        auto row = results.front;
+        auto thing = row.as!Item();
+
+        assert(thing == Item(1, "Light bulb"));
+    }
+
+private:
+    int internalIndex(size_t index)
+    {
+        assertInitialized();
+        auto i = index + frontIndex;
+        assert(i >= 0 && i <= backIndex, "invalid column index: %d".format(i));
+        assert(i <= int.max, "invalid index value: %d".format(i));
+        return cast(int) i;
+    }
+
+    int indexForName(string name)
+    {
+        assertInitialized();
+        assert(name.length, "column with no name");
+        foreach (i; frontIndex .. backIndex + 1)
+        {
+            assert(i <= int.max, "invalid index value: %d".format(i));
+            if (sqlite3_column_name(statement.handle, cast(int) i).to!string == name)
+                return i;
+        }
+
+        assert(false, "invalid column name: '%s'".format(name));
+    }
+
+    void assertInitialized() nothrow
+    {
+        assert(!empty, "Accessing elements of an empty row");
+        assert(statement.handle !is null, "operation on an empty statement");
+    }
+}
+
+/// Behavior of the `Row.peek()` method for arrays/strings
+enum PeekMode
+{
+    /++
+    Return a copy of the data into a new array/string.
+    The copy is safe to use after stepping to the next row.
+    +/
+    copy,
+
+    /++
+    Return a slice of the data.
+    The slice can point to invalid data after stepping to the next row.
+    +/
+    slice
+}
+
+/++
+Some data retrieved from a column.
++/
+struct ColumnData
+{
+    import std.traits : isBoolean, isIntegral, isNumeric, isFloatingPoint,
+        isSomeString, isArray;
+    import std.variant : Algebraic, VariantException;
+
+    alias SqliteVariant = Algebraic!(long, double, string, Blob, typeof(null));
+
+    private
+    {
+        SqliteVariant _value;
+        SqliteType _type;
+    }
+
+    /++
+    Creates a new `ColumnData` from the value.
+    +/
+    this(T)(inout T value) inout
+        if (isBoolean!T || isIntegral!T)
+    {
+        _value = SqliteVariant(value.to!long);
+        _type = SqliteType.INTEGER;
+    }
+
+    /// ditto
+    this(T)(T value)
+        if (isFloatingPoint!T)
+    {
+        _value = SqliteVariant(value.to!double);
+        _type = SqliteType.FLOAT;
+    }
+
+    /// ditto
+    this(T)(T value)
+        if (isSomeString!T)
+    {
+        if (value is null)
+        {
+            _value = SqliteVariant(null);
+            _type = SqliteType.NULL;
+        }
+        else
+        {
+            _value = SqliteVariant(value.to!string);
+            _type = SqliteType.TEXT;
+        }
+    }
+
+    /// ditto
+    this(T)(T value)
+        if (isArray!T && !isSomeString!T)
+    {
+        if (value is null)
+        {
+            _value = SqliteVariant(null);
+            _type = SqliteType.NULL;
+        }
+        else
+        {
+            _value = SqliteVariant(value.to!Blob);
+            _type = SqliteType.BLOB;
+        }
+    }
+    /// ditto
+    this(T)(T value)
+        if (is(T == typeof(null)))
+    {
+        _value = SqliteVariant(null);
+        _type = SqliteType.NULL;
+    }
+
+    /++
+    Returns the Sqlite type of the column.
+    +/
+    SqliteType type() const nothrow
+    {
+        assertInitialized();
+        return _type;
+    }
+
+    /++
+    Returns the data converted to T.
+
+    If the data is NULL, defaultValue is returned.
+
+    Throws:
+        VariantException if the value cannot be converted
+        to the desired type.
+    +/
+    auto as(T)(T defaultValue = T.init)
+        if (isBoolean!T || isNumeric!T || isSomeString!T)
+    {
+        assertInitialized();
+
+        if (_type == SqliteType.NULL)
+            return defaultValue;
+
+        return _value.coerce!T;
+    }
+
+    /// ditto
+    auto as(T)(T defaultValue = T.init)
+        if (isArray!T && !isSomeString!T)
+    {
+        assertInitialized();
+
+        if (_type == SqliteType.NULL)
+            return defaultValue;
+
+        Blob data = _value.get!Blob;
+        return cast(T) data;
+    }
+
+    /// ditto
+    auto as(T : Nullable!U, U...)(T defaultValue = T.init)
+    {
+        assertInitialized();
+
+        if (_type == SqliteType.NULL)
+            return defaultValue;
+
+        return T(as!U());
+    }
+
+    void toString(scope void delegate(const(char)[]) sink)
+    {
+        assertInitialized();
+
+        if (_type == SqliteType.NULL)
+            sink("null");
+        else
+            sink(_value.toString);
+    }
+
+private:
+    void assertInitialized() const nothrow
+    {
+        assert(_value.hasValue, "Accessing uninitialized ColumnData");
+    }
+}
+
+/++
+Caches all the results of a query into memory at once.
+
+This allows to keep all the rows returned from a query accessible in any order
+and indefinitely.
+
+Returns:
+    A `CachedResults` struct that allows to iterate on the rows and their
+    columns with an array-like interface.
+
+    The `CachedResults` struct is equivalent to an array of 'rows', which in
+    turn can be viewed as either an array of `ColumnData` or as an associative
+    array of `ColumnData` indexed by the column names.
++/
+CachedResults cached(ResultRange results)
+{
+    return CachedResults(results);
+}
+///
+unittest
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (msg TEXT, num FLOAT);
+            INSERT INTO test (msg, num) VALUES ('ABC', 123);
+            INSERT INTO test (msg, num) VALUES ('DEF', 456);");
+
+    auto results = db.execute("SELECT * FROM test").cached;
+    assert(results.length == 2);
+    assert(results[0][0].as!string == "ABC");
+    assert(results[0][1].as!int == 123);
+    assert(results[1]["msg"].as!string == "DEF");
+    assert(results[1]["num"].as!int == 456);
+}
+
+/++
+Stores all the results of a query.
+
+The `CachedResults` struct is equivalent to an array of 'rows', which in
+turn can be viewed as either an array of `ColumnData` or as an associative
+array of `ColumnData` indexed by the column names.
+
+Unlike `ResultRange`, `CachedResults` is a random-access range of rows, and its
+data always remain available.
+
+See_Also:
+    `cached` for an example.
++/
+struct CachedResults
+{
+    import std.array : appender;
+
+    // A row of retrieved data
+    struct CachedRow
+    {
+        ColumnData[] columns;
+        alias columns this;
+
+        size_t[string] columnIndexes;
+
+        private this(Row row, size_t[string] columnIndexes)
+        {
+            this.columnIndexes = columnIndexes;
+
+            auto colapp = appender!(ColumnData[]);
+            foreach (i; 0 .. row.length)
+                colapp.put(row[i]);
+            columns = colapp.data;
+        }
+
+        // Returns the data at the given index in the row.
+        ColumnData opIndex(size_t index)
+        {
+            return columns[index];
+        }
+
+        // Returns the data at the given column.
+        ColumnData opIndex(string name)
+        {
+            auto index = name in columnIndexes;
+            assert(index, "unknown column name: %s".format(name));
+            return columns[*index];
+        }
+    }
+
+    // All the rows returned by the query.
+    CachedRow[] rows;
+    alias rows this;
+
+    private size_t[string] columnIndexes;
+
+    this(ResultRange results)
+    {
+        if (!results.empty)
+        {
+            auto first = results.front;
+            foreach (i; 0 .. first.length)
+            {
+                assert(i <= int.max, "invalid column index value: %d".format(i));
+                auto name = sqlite3_column_name(results.statement.handle, cast(int) i).to!string;
+                columnIndexes[name] = i;
+            }
+        }
+
+        auto rowapp = appender!(CachedRow[]);
+        while (!results.empty)
+        {
+            rowapp.put(CachedRow(results.front, columnIndexes));
+            results.popFront();
+        }
+        rows = rowapp.data;
+    }
+}
diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/sqlite3.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/sqlite3.d
new file mode 100644
index 0000000..4b528a7
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/sqlite3.d
@@ -0,0 +1,11437 @@
+/++ Auto-generated C API bindings. +/
+/*
+** 2001-09-15
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+** This header file defines the interface that the SQLite library
+** presents to client programs.  If a C-function, structure, datatype,
+** or constant definition does not appear in this file, then it is
+** not a published API of SQLite, is subject to change without
+** notice, and should not be referenced by programs that use SQLite.
+**
+** Some of the definitions that are in this file are marked as
+** "experimental".  Experimental interfaces are normally new
+** features recently added to SQLite.  We do not anticipate changes
+** to experimental interfaces but reserve the right to make minor changes
+** if experience from use "in the wild" suggest such changes are prudent.
+**
+** The official C-language API documentation for SQLite is derived
+** from comments in this file.  This file is the authoritative source
+** on how SQLite interfaces are supposed to operate.
+**
+** The name of this file under configuration management is "sqlite.h.in".
+** The makefile makes some minor changes to this file (such as inserting
+** the version number) and changes its name to "sqlite3.h" as
+** part of the build process.
+*/
+
+module d2sqlite3.sqlite3;
+
+import core.stdc.config;
+import core.stdc.stdarg;
+
+extern (C):
+nothrow:
+@nogc:
+
+/* Needed for the definition of va_list */
+
+/*
+** Make sure we can call this stuff from C++.
+*/
+
+/*
+** Provide the ability to override linkage features of the interface.
+*/
+
+/*
+** These no-op macros are used in front of interfaces to mark those
+** interfaces as either deprecated or experimental.  New applications
+** should not use deprecated interfaces - they are supported for backwards
+** compatibility only.  Application writers should be aware that
+** experimental interfaces are subject to change in point releases.
+**
+** These macros used to resolve to various kinds of compiler magic that
+** would generate warning messages when they were used.  But that
+** compiler magic ended up generating such a flurry of bug reports
+** that we have taken it all out and gone back to using simple
+** noop macros.
+*/
+
+/*
+** Ensure these symbols were not defined by some previous header file.
+*/
+
+/*
+** CAPI3REF: Compile-Time Library Version Numbers
+**
+** ^(The [SQLITE_VERSION] C preprocessor macro in the sqlite3.h header
+** evaluates to a string literal that is the SQLite version in the
+** format "X.Y.Z" where X is the major version number (always 3 for
+** SQLite3) and Y is the minor version number and Z is the release number.)^
+** ^(The [SQLITE_VERSION_NUMBER] C preprocessor macro resolves to an integer
+** with the value (X*1000000 + Y*1000 + Z) where X, Y, and Z are the same
+** numbers used in [SQLITE_VERSION].)^
+** The SQLITE_VERSION_NUMBER for any given release of SQLite will also
+** be larger than the release from which it is derived.  Either Y will
+** be held constant and Z will be incremented or else Y will be incremented
+** and Z will be reset to zero.
+**
+** Since [version 3.6.18] ([dateof:3.6.18]),
+** SQLite source code has been stored in the
+** <a href="http://www.fossil-scm.org/">Fossil configuration management
+** system</a>.  ^The SQLITE_SOURCE_ID macro evaluates to
+** a string which identifies a particular check-in of SQLite
+** within its configuration management system.  ^The SQLITE_SOURCE_ID
+** string contains the date and time of the check-in (UTC) and a SHA1
+** or SHA3-256 hash of the entire source tree.  If the source code has
+** been edited in any way since it was last checked in, then the last
+** four hexadecimal digits of the hash may be modified.
+**
+** See also: [sqlite3_libversion()],
+** [sqlite3_libversion_number()], [sqlite3_sourceid()],
+** [sqlite_version()] and [sqlite_source_id()].
+*/
+enum SQLITE_VERSION = "3.25.3";
+enum SQLITE_VERSION_NUMBER = 3025003;
+enum SQLITE_SOURCE_ID = "2018-11-05 20:37:38 89e099fbe5e13c33e683bef07361231ca525b88f7907be7092058007b75036f2";
+
+/*
+** CAPI3REF: Run-Time Library Version Numbers
+** KEYWORDS: sqlite3_version sqlite3_sourceid
+**
+** These interfaces provide the same information as the [SQLITE_VERSION],
+** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
+** but are associated with the library instead of the header file.  ^(Cautious
+** programmers might include assert() statements in their application to
+** verify that values returned by these interfaces match the macros in
+** the header, and thus ensure that the application is
+** compiled with matching library and header files.
+**
+** <blockquote><pre>
+** assert( sqlite3_libversion_number()==SQLITE_VERSION_NUMBER );
+** assert( strncmp(sqlite3_sourceid(),SQLITE_SOURCE_ID,80)==0 );
+** assert( strcmp(sqlite3_libversion(),SQLITE_VERSION)==0 );
+** </pre></blockquote>)^
+**
+** ^The sqlite3_version[] string constant contains the text of [SQLITE_VERSION]
+** macro.  ^The sqlite3_libversion() function returns a pointer to the
+** to the sqlite3_version[] string constant.  The sqlite3_libversion()
+** function is provided for use in DLLs since DLL users usually do not have
+** direct access to string constants within the DLL.  ^The
+** sqlite3_libversion_number() function returns an integer equal to
+** [SQLITE_VERSION_NUMBER].  ^(The sqlite3_sourceid() function returns
+** a pointer to a string constant whose value is the same as the
+** [SQLITE_SOURCE_ID] C preprocessor macro.  Except if SQLite is built
+** using an edited copy of [the amalgamation], then the last four characters
+** of the hash might be different from [SQLITE_SOURCE_ID].)^
+**
+** See also: [sqlite_version()] and [sqlite_source_id()].
+*/
+extern __gshared const(char)[] sqlite3_version;
+const(char)* sqlite3_libversion();
+const(char)* sqlite3_sourceid();
+int sqlite3_libversion_number();
+
+/*
+** CAPI3REF: Run-Time Library Compilation Options Diagnostics
+**
+** ^The sqlite3_compileoption_used() function returns 0 or 1
+** indicating whether the specified option was defined at
+** compile time.  ^The SQLITE_ prefix may be omitted from the
+** option name passed to sqlite3_compileoption_used().
+**
+** ^The sqlite3_compileoption_get() function allows iterating
+** over the list of options that were defined at compile time by
+** returning the N-th compile time option string.  ^If N is out of range,
+** sqlite3_compileoption_get() returns a NULL pointer.  ^The SQLITE_
+** prefix is omitted from any strings returned by
+** sqlite3_compileoption_get().
+**
+** ^Support for the diagnostic functions sqlite3_compileoption_used()
+** and sqlite3_compileoption_get() may be omitted by specifying the
+** [SQLITE_OMIT_COMPILEOPTION_DIAGS] option at compile time.
+**
+** See also: SQL functions [sqlite_compileoption_used()] and
+** [sqlite_compileoption_get()] and the [compile_options pragma].
+*/
+
+int sqlite3_compileoption_used(const(char)* zOptName);
+const(char)* sqlite3_compileoption_get(int N);
+
+/*
+** CAPI3REF: Test To See If The Library Is Threadsafe
+**
+** ^The sqlite3_threadsafe() function returns zero if and only if
+** SQLite was compiled with mutexing code omitted due to the
+** [SQLITE_THREADSAFE] compile-time option being set to 0.
+**
+** SQLite can be compiled with or without mutexes.  When
+** the [SQLITE_THREADSAFE] C preprocessor macro is 1 or 2, mutexes
+** are enabled and SQLite is threadsafe.  When the
+** [SQLITE_THREADSAFE] macro is 0,
+** the mutexes are omitted.  Without the mutexes, it is not safe
+** to use SQLite concurrently from more than one thread.
+**
+** Enabling mutexes incurs a measurable performance penalty.
+** So if speed is of utmost importance, it makes sense to disable
+** the mutexes.  But for maximum safety, mutexes should be enabled.
+** ^The default behavior is for mutexes to be enabled.
+**
+** This interface can be used by an application to make sure that the
+** version of SQLite that it is linking against was compiled with
+** the desired setting of the [SQLITE_THREADSAFE] macro.
+**
+** This interface only reports on the compile-time mutex setting
+** of the [SQLITE_THREADSAFE] flag.  If SQLite is compiled with
+** SQLITE_THREADSAFE=1 or =2 then mutexes are enabled by default but
+** can be fully or partially disabled using a call to [sqlite3_config()]
+** with the verbs [SQLITE_CONFIG_SINGLETHREAD], [SQLITE_CONFIG_MULTITHREAD],
+** or [SQLITE_CONFIG_SERIALIZED].  ^(The return value of the
+** sqlite3_threadsafe() function shows only the compile-time setting of
+** thread safety, not any run-time changes to that setting made by
+** sqlite3_config(). In other words, the return value from sqlite3_threadsafe()
+** is unchanged by calls to sqlite3_config().)^
+**
+** See the [threading mode] documentation for additional information.
+*/
+int sqlite3_threadsafe();
+
+/*
+** CAPI3REF: Database Connection Handle
+** KEYWORDS: {database connection} {database connections}
+**
+** Each open SQLite database is represented by a pointer to an instance of
+** the opaque structure named "sqlite3".  It is useful to think of an sqlite3
+** pointer as an object.  The [sqlite3_open()], [sqlite3_open16()], and
+** [sqlite3_open_v2()] interfaces are its constructors, and [sqlite3_close()]
+** and [sqlite3_close_v2()] are its destructors.  There are many other
+** interfaces (such as
+** [sqlite3_prepare_v2()], [sqlite3_create_function()], and
+** [sqlite3_busy_timeout()] to name but three) that are methods on an
+** sqlite3 object.
+*/
+struct sqlite3;
+
+/*
+** CAPI3REF: 64-Bit Integer Types
+** KEYWORDS: sqlite_int64 sqlite_uint64
+**
+** Because there is no cross-platform way to specify 64-bit integer types
+** SQLite includes typedefs for 64-bit signed and unsigned integers.
+**
+** The sqlite3_int64 and sqlite3_uint64 are the preferred type definitions.
+** The sqlite_int64 and sqlite_uint64 types are supported for backwards
+** compatibility only.
+**
+** ^The sqlite3_int64 and sqlite_int64 types can store integer values
+** between -9223372036854775808 and +9223372036854775807 inclusive.  ^The
+** sqlite3_uint64 and sqlite_uint64 types can store integer values
+** between 0 and +18446744073709551615 inclusive.
+*/
+
+alias sqlite_int64 = long;
+alias sqlite_uint64 = ulong;
+
+alias sqlite3_int64 = long;
+alias sqlite3_uint64 = ulong;
+
+/*
+** If compiling for a processor that lacks floating point support,
+** substitute integer for floating-point.
+*/
+
+/*
+** CAPI3REF: Closing A Database Connection
+** DESTRUCTOR: sqlite3
+**
+** ^The sqlite3_close() and sqlite3_close_v2() routines are destructors
+** for the [sqlite3] object.
+** ^Calls to sqlite3_close() and sqlite3_close_v2() return [SQLITE_OK] if
+** the [sqlite3] object is successfully destroyed and all associated
+** resources are deallocated.
+**
+** ^If the database connection is associated with unfinalized prepared
+** statements or unfinished sqlite3_backup objects then sqlite3_close()
+** will leave the database connection open and return [SQLITE_BUSY].
+** ^If sqlite3_close_v2() is called with unfinalized prepared statements
+** and/or unfinished sqlite3_backups, then the database connection becomes
+** an unusable "zombie" which will automatically be deallocated when the
+** last prepared statement is finalized or the last sqlite3_backup is
+** finished.  The sqlite3_close_v2() interface is intended for use with
+** host languages that are garbage collected, and where the order in which
+** destructors are called is arbitrary.
+**
+** Applications should [sqlite3_finalize | finalize] all [prepared statements],
+** [sqlite3_blob_close | close] all [BLOB handles], and
+** [sqlite3_backup_finish | finish] all [sqlite3_backup] objects associated
+** with the [sqlite3] object prior to attempting to close the object.  ^If
+** sqlite3_close_v2() is called on a [database connection] that still has
+** outstanding [prepared statements], [BLOB handles], and/or
+** [sqlite3_backup] objects then it returns [SQLITE_OK] and the deallocation
+** of resources is deferred until all [prepared statements], [BLOB handles],
+** and [sqlite3_backup] objects are also destroyed.
+**
+** ^If an [sqlite3] object is destroyed while a transaction is open,
+** the transaction is automatically rolled back.
+**
+** The C parameter to [sqlite3_close(C)] and [sqlite3_close_v2(C)]
+** must be either a NULL
+** pointer or an [sqlite3] object pointer obtained
+** from [sqlite3_open()], [sqlite3_open16()], or
+** [sqlite3_open_v2()], and not previously closed.
+** ^Calling sqlite3_close() or sqlite3_close_v2() with a NULL pointer
+** argument is a harmless no-op.
+*/
+int sqlite3_close(sqlite3*);
+int sqlite3_close_v2(sqlite3*);
+
+/*
+** The type for a callback function.
+** This is legacy and deprecated.  It is included for historical
+** compatibility and is not documented.
+*/
+alias sqlite3_callback = int function(void*, int, char**, char**);
+
+/*
+** CAPI3REF: One-Step Query Execution Interface
+** METHOD: sqlite3
+**
+** The sqlite3_exec() interface is a convenience wrapper around
+** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()],
+** that allows an application to run multiple statements of SQL
+** without having to use a lot of C code.
+**
+** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
+** semicolon-separate SQL statements passed into its 2nd argument,
+** in the context of the [database connection] passed in as its 1st
+** argument.  ^If the callback function of the 3rd argument to
+** sqlite3_exec() is not NULL, then it is invoked for each result row
+** coming out of the evaluated SQL statements.  ^The 4th argument to
+** sqlite3_exec() is relayed through to the 1st argument of each
+** callback invocation.  ^If the callback pointer to sqlite3_exec()
+** is NULL, then no callback is ever invoked and result rows are
+** ignored.
+**
+** ^If an error occurs while evaluating the SQL statements passed into
+** sqlite3_exec(), then execution of the current statement stops and
+** subsequent statements are skipped.  ^If the 5th parameter to sqlite3_exec()
+** is not NULL then any error message is written into memory obtained
+** from [sqlite3_malloc()] and passed back through the 5th parameter.
+** To avoid memory leaks, the application should invoke [sqlite3_free()]
+** on error message strings returned through the 5th parameter of
+** sqlite3_exec() after the error message string is no longer needed.
+** ^If the 5th parameter to sqlite3_exec() is not NULL and no errors
+** occur, then sqlite3_exec() sets the pointer in its 5th parameter to
+** NULL before returning.
+**
+** ^If an sqlite3_exec() callback returns non-zero, the sqlite3_exec()
+** routine returns SQLITE_ABORT without invoking the callback again and
+** without running any subsequent SQL statements.
+**
+** ^The 2nd argument to the sqlite3_exec() callback function is the
+** number of columns in the result.  ^The 3rd argument to the sqlite3_exec()
+** callback is an array of pointers to strings obtained as if from
+** [sqlite3_column_text()], one for each column.  ^If an element of a
+** result row is NULL then the corresponding string pointer for the
+** sqlite3_exec() callback is a NULL pointer.  ^The 4th argument to the
+** sqlite3_exec() callback is an array of pointers to strings where each
+** entry represents the name of corresponding result column as obtained
+** from [sqlite3_column_name()].
+**
+** ^If the 2nd parameter to sqlite3_exec() is a NULL pointer, a pointer
+** to an empty string, or a pointer that contains only whitespace and/or
+** SQL comments, then no SQL statements are evaluated and the database
+** is not changed.
+**
+** Restrictions:
+**
+** <ul>
+** <li> The application must ensure that the 1st parameter to sqlite3_exec()
+**      is a valid and open [database connection].
+** <li> The application must not close the [database connection] specified by
+**      the 1st parameter to sqlite3_exec() while sqlite3_exec() is running.
+** <li> The application must not modify the SQL statement text passed into
+**      the 2nd parameter of sqlite3_exec() while sqlite3_exec() is running.
+** </ul>
+*/
+/* An open database */
+/* SQL to be evaluated */
+/* Callback function */
+/* 1st argument to callback */
+/* Error msg written here */
+int sqlite3_exec(
+    sqlite3*,
+    const(char)* sql,
+    int function(void*, int, char**, char**) callback,
+    void*,
+    char** errmsg);
+
+/*
+** CAPI3REF: Result Codes
+** KEYWORDS: {result code definitions}
+**
+** Many SQLite functions return an integer result code from the set shown
+** here in order to indicate success or failure.
+**
+** New error codes may be added in future versions of SQLite.
+**
+** See also: [extended result code definitions]
+*/
+enum SQLITE_OK = 0; /* Successful result */
+/* beginning-of-error-codes */
+enum SQLITE_ERROR = 1; /* Generic error */
+enum SQLITE_INTERNAL = 2; /* Internal logic error in SQLite */
+enum SQLITE_PERM = 3; /* Access permission denied */
+enum SQLITE_ABORT = 4; /* Callback routine requested an abort */
+enum SQLITE_BUSY = 5; /* The database file is locked */
+enum SQLITE_LOCKED = 6; /* A table in the database is locked */
+enum SQLITE_NOMEM = 7; /* A malloc() failed */
+enum SQLITE_READONLY = 8; /* Attempt to write a readonly database */
+enum SQLITE_INTERRUPT = 9; /* Operation terminated by sqlite3_interrupt()*/
+enum SQLITE_IOERR = 10; /* Some kind of disk I/O error occurred */
+enum SQLITE_CORRUPT = 11; /* The database disk image is malformed */
+enum SQLITE_NOTFOUND = 12; /* Unknown opcode in sqlite3_file_control() */
+enum SQLITE_FULL = 13; /* Insertion failed because database is full */
+enum SQLITE_CANTOPEN = 14; /* Unable to open the database file */
+enum SQLITE_PROTOCOL = 15; /* Database lock protocol error */
+enum SQLITE_EMPTY = 16; /* Internal use only */
+enum SQLITE_SCHEMA = 17; /* The database schema changed */
+enum SQLITE_TOOBIG = 18; /* String or BLOB exceeds size limit */
+enum SQLITE_CONSTRAINT = 19; /* Abort due to constraint violation */
+enum SQLITE_MISMATCH = 20; /* Data type mismatch */
+enum SQLITE_MISUSE = 21; /* Library used incorrectly */
+enum SQLITE_NOLFS = 22; /* Uses OS features not supported on host */
+enum SQLITE_AUTH = 23; /* Authorization denied */
+enum SQLITE_FORMAT = 24; /* Not used */
+enum SQLITE_RANGE = 25; /* 2nd parameter to sqlite3_bind out of range */
+enum SQLITE_NOTADB = 26; /* File opened that is not a database file */
+enum SQLITE_NOTICE = 27; /* Notifications from sqlite3_log() */
+enum SQLITE_WARNING = 28; /* Warnings from sqlite3_log() */
+enum SQLITE_ROW = 100; /* sqlite3_step() has another row ready */
+enum SQLITE_DONE = 101; /* sqlite3_step() has finished executing */
+/* end-of-error-codes */
+
+/*
+** CAPI3REF: Extended Result Codes
+** KEYWORDS: {extended result code definitions}
+**
+** In its default configuration, SQLite API routines return one of 30 integer
+** [result codes].  However, experience has shown that many of
+** these result codes are too coarse-grained.  They do not provide as
+** much information about problems as programmers might like.  In an effort to
+** address this, newer versions of SQLite (version 3.3.8 [dateof:3.3.8]
+** and later) include
+** support for additional result codes that provide more detailed information
+** about errors. These [extended result codes] are enabled or disabled
+** on a per database connection basis using the
+** [sqlite3_extended_result_codes()] API.  Or, the extended code for
+** the most recent error can be obtained using
+** [sqlite3_extended_errcode()].
+*/
+enum SQLITE_ERROR_MISSING_COLLSEQ = SQLITE_ERROR | (1 << 8);
+enum SQLITE_ERROR_RETRY = SQLITE_ERROR | (2 << 8);
+enum SQLITE_ERROR_SNAPSHOT = SQLITE_ERROR | (3 << 8);
+enum SQLITE_IOERR_READ = SQLITE_IOERR | (1 << 8);
+enum SQLITE_IOERR_SHORT_READ = SQLITE_IOERR | (2 << 8);
+enum SQLITE_IOERR_WRITE = SQLITE_IOERR | (3 << 8);
+enum SQLITE_IOERR_FSYNC = SQLITE_IOERR | (4 << 8);
+enum SQLITE_IOERR_DIR_FSYNC = SQLITE_IOERR | (5 << 8);
+enum SQLITE_IOERR_TRUNCATE = SQLITE_IOERR | (6 << 8);
+enum SQLITE_IOERR_FSTAT = SQLITE_IOERR | (7 << 8);
+enum SQLITE_IOERR_UNLOCK = SQLITE_IOERR | (8 << 8);
+enum SQLITE_IOERR_RDLOCK = SQLITE_IOERR | (9 << 8);
+enum SQLITE_IOERR_DELETE = SQLITE_IOERR | (10 << 8);
+enum SQLITE_IOERR_BLOCKED = SQLITE_IOERR | (11 << 8);
+enum SQLITE_IOERR_NOMEM = SQLITE_IOERR | (12 << 8);
+enum SQLITE_IOERR_ACCESS = SQLITE_IOERR | (13 << 8);
+enum SQLITE_IOERR_CHECKRESERVEDLOCK = SQLITE_IOERR | (14 << 8);
+enum SQLITE_IOERR_LOCK = SQLITE_IOERR | (15 << 8);
+enum SQLITE_IOERR_CLOSE = SQLITE_IOERR | (16 << 8);
+enum SQLITE_IOERR_DIR_CLOSE = SQLITE_IOERR | (17 << 8);
+enum SQLITE_IOERR_SHMOPEN = SQLITE_IOERR | (18 << 8);
+enum SQLITE_IOERR_SHMSIZE = SQLITE_IOERR | (19 << 8);
+enum SQLITE_IOERR_SHMLOCK = SQLITE_IOERR | (20 << 8);
+enum SQLITE_IOERR_SHMMAP = SQLITE_IOERR | (21 << 8);
+enum SQLITE_IOERR_SEEK = SQLITE_IOERR | (22 << 8);
+enum SQLITE_IOERR_DELETE_NOENT = SQLITE_IOERR | (23 << 8);
+enum SQLITE_IOERR_MMAP = SQLITE_IOERR | (24 << 8);
+enum SQLITE_IOERR_GETTEMPPATH = SQLITE_IOERR | (25 << 8);
+enum SQLITE_IOERR_CONVPATH = SQLITE_IOERR | (26 << 8);
+enum SQLITE_IOERR_VNODE = SQLITE_IOERR | (27 << 8);
+enum SQLITE_IOERR_AUTH = SQLITE_IOERR | (28 << 8);
+enum SQLITE_IOERR_BEGIN_ATOMIC = SQLITE_IOERR | (29 << 8);
+enum SQLITE_IOERR_COMMIT_ATOMIC = SQLITE_IOERR | (30 << 8);
+enum SQLITE_IOERR_ROLLBACK_ATOMIC = SQLITE_IOERR | (31 << 8);
+enum SQLITE_LOCKED_SHAREDCACHE = SQLITE_LOCKED | (1 << 8);
+enum SQLITE_LOCKED_VTAB = SQLITE_LOCKED | (2 << 8);
+enum SQLITE_BUSY_RECOVERY = SQLITE_BUSY | (1 << 8);
+enum SQLITE_BUSY_SNAPSHOT = SQLITE_BUSY | (2 << 8);
+enum SQLITE_CANTOPEN_NOTEMPDIR = SQLITE_CANTOPEN | (1 << 8);
+enum SQLITE_CANTOPEN_ISDIR = SQLITE_CANTOPEN | (2 << 8);
+enum SQLITE_CANTOPEN_FULLPATH = SQLITE_CANTOPEN | (3 << 8);
+enum SQLITE_CANTOPEN_CONVPATH = SQLITE_CANTOPEN | (4 << 8);
+enum SQLITE_CANTOPEN_DIRTYWAL = SQLITE_CANTOPEN | (5 << 8); /* Not Used */
+enum SQLITE_CORRUPT_VTAB = SQLITE_CORRUPT | (1 << 8);
+enum SQLITE_CORRUPT_SEQUENCE = SQLITE_CORRUPT | (2 << 8);
+enum SQLITE_READONLY_RECOVERY = SQLITE_READONLY | (1 << 8);
+enum SQLITE_READONLY_CANTLOCK = SQLITE_READONLY | (2 << 8);
+enum SQLITE_READONLY_ROLLBACK = SQLITE_READONLY | (3 << 8);
+enum SQLITE_READONLY_DBMOVED = SQLITE_READONLY | (4 << 8);
+enum SQLITE_READONLY_CANTINIT = SQLITE_READONLY | (5 << 8);
+enum SQLITE_READONLY_DIRECTORY = SQLITE_READONLY | (6 << 8);
+enum SQLITE_ABORT_ROLLBACK = SQLITE_ABORT | (2 << 8);
+enum SQLITE_CONSTRAINT_CHECK = SQLITE_CONSTRAINT | (1 << 8);
+enum SQLITE_CONSTRAINT_COMMITHOOK = SQLITE_CONSTRAINT | (2 << 8);
+enum SQLITE_CONSTRAINT_FOREIGNKEY = SQLITE_CONSTRAINT | (3 << 8);
+enum SQLITE_CONSTRAINT_FUNCTION = SQLITE_CONSTRAINT | (4 << 8);
+enum SQLITE_CONSTRAINT_NOTNULL = SQLITE_CONSTRAINT | (5 << 8);
+enum SQLITE_CONSTRAINT_PRIMARYKEY = SQLITE_CONSTRAINT | (6 << 8);
+enum SQLITE_CONSTRAINT_TRIGGER = SQLITE_CONSTRAINT | (7 << 8);
+enum SQLITE_CONSTRAINT_UNIQUE = SQLITE_CONSTRAINT | (8 << 8);
+enum SQLITE_CONSTRAINT_VTAB = SQLITE_CONSTRAINT | (9 << 8);
+enum SQLITE_CONSTRAINT_ROWID = SQLITE_CONSTRAINT | (10 << 8);
+enum SQLITE_NOTICE_RECOVER_WAL = SQLITE_NOTICE | (1 << 8);
+enum SQLITE_NOTICE_RECOVER_ROLLBACK = SQLITE_NOTICE | (2 << 8);
+enum SQLITE_WARNING_AUTOINDEX = SQLITE_WARNING | (1 << 8);
+enum SQLITE_AUTH_USER = SQLITE_AUTH | (1 << 8);
+enum SQLITE_OK_LOAD_PERMANENTLY = SQLITE_OK | (1 << 8);
+
+/*
+** CAPI3REF: Flags For File Open Operations
+**
+** These bit values are intended for use in the
+** 3rd parameter to the [sqlite3_open_v2()] interface and
+** in the 4th parameter to the [sqlite3_vfs.xOpen] method.
+*/
+enum SQLITE_OPEN_READONLY = 0x00000001; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_READWRITE = 0x00000002; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_CREATE = 0x00000004; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_DELETEONCLOSE = 0x00000008; /* VFS only */
+enum SQLITE_OPEN_EXCLUSIVE = 0x00000010; /* VFS only */
+enum SQLITE_OPEN_AUTOPROXY = 0x00000020; /* VFS only */
+enum SQLITE_OPEN_URI = 0x00000040; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_MEMORY = 0x00000080; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_MAIN_DB = 0x00000100; /* VFS only */
+enum SQLITE_OPEN_TEMP_DB = 0x00000200; /* VFS only */
+enum SQLITE_OPEN_TRANSIENT_DB = 0x00000400; /* VFS only */
+enum SQLITE_OPEN_MAIN_JOURNAL = 0x00000800; /* VFS only */
+enum SQLITE_OPEN_TEMP_JOURNAL = 0x00001000; /* VFS only */
+enum SQLITE_OPEN_SUBJOURNAL = 0x00002000; /* VFS only */
+enum SQLITE_OPEN_MASTER_JOURNAL = 0x00004000; /* VFS only */
+enum SQLITE_OPEN_NOMUTEX = 0x00008000; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_FULLMUTEX = 0x00010000; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_SHAREDCACHE = 0x00020000; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_PRIVATECACHE = 0x00040000; /* Ok for sqlite3_open_v2() */
+enum SQLITE_OPEN_WAL = 0x00080000; /* VFS only */
+
+/* Reserved:                         0x00F00000 */
+
+/*
+** CAPI3REF: Device Characteristics
+**
+** The xDeviceCharacteristics method of the [sqlite3_io_methods]
+** object returns an integer which is a vector of these
+** bit values expressing I/O characteristics of the mass storage
+** device that holds the file that the [sqlite3_io_methods]
+** refers to.
+**
+** The SQLITE_IOCAP_ATOMIC property means that all writes of
+** any size are atomic.  The SQLITE_IOCAP_ATOMICnnn values
+** mean that writes of blocks that are nnn bytes in size and
+** are aligned to an address which is an integer multiple of
+** nnn are atomic.  The SQLITE_IOCAP_SAFE_APPEND value means
+** that when data is appended to a file, the data is appended
+** first then the size of the file is extended, never the other
+** way around.  The SQLITE_IOCAP_SEQUENTIAL property means that
+** information is written to disk in the same order as calls
+** to xWrite().  The SQLITE_IOCAP_POWERSAFE_OVERWRITE property means that
+** after reboot following a crash or power loss, the only bytes in a
+** file that were written at the application level might have changed
+** and that adjacent bytes, even bytes within the same sector are
+** guaranteed to be unchanged.  The SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN
+** flag indicates that a file cannot be deleted when open.  The
+** SQLITE_IOCAP_IMMUTABLE flag indicates that the file is on
+** read-only media and cannot be changed even by processes with
+** elevated privileges.
+**
+** The SQLITE_IOCAP_BATCH_ATOMIC property means that the underlying
+** filesystem supports doing multiple write operations atomically when those
+** write operations are bracketed by [SQLITE_FCNTL_BEGIN_ATOMIC_WRITE] and
+** [SQLITE_FCNTL_COMMIT_ATOMIC_WRITE].
+*/
+enum SQLITE_IOCAP_ATOMIC = 0x00000001;
+enum SQLITE_IOCAP_ATOMIC512 = 0x00000002;
+enum SQLITE_IOCAP_ATOMIC1K = 0x00000004;
+enum SQLITE_IOCAP_ATOMIC2K = 0x00000008;
+enum SQLITE_IOCAP_ATOMIC4K = 0x00000010;
+enum SQLITE_IOCAP_ATOMIC8K = 0x00000020;
+enum SQLITE_IOCAP_ATOMIC16K = 0x00000040;
+enum SQLITE_IOCAP_ATOMIC32K = 0x00000080;
+enum SQLITE_IOCAP_ATOMIC64K = 0x00000100;
+enum SQLITE_IOCAP_SAFE_APPEND = 0x00000200;
+enum SQLITE_IOCAP_SEQUENTIAL = 0x00000400;
+enum SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN = 0x00000800;
+enum SQLITE_IOCAP_POWERSAFE_OVERWRITE = 0x00001000;
+enum SQLITE_IOCAP_IMMUTABLE = 0x00002000;
+enum SQLITE_IOCAP_BATCH_ATOMIC = 0x00004000;
+
+/*
+** CAPI3REF: File Locking Levels
+**
+** SQLite uses one of these integer values as the second
+** argument to calls it makes to the xLock() and xUnlock() methods
+** of an [sqlite3_io_methods] object.
+*/
+enum SQLITE_LOCK_NONE = 0;
+enum SQLITE_LOCK_SHARED = 1;
+enum SQLITE_LOCK_RESERVED = 2;
+enum SQLITE_LOCK_PENDING = 3;
+enum SQLITE_LOCK_EXCLUSIVE = 4;
+
+/*
+** CAPI3REF: Synchronization Type Flags
+**
+** When SQLite invokes the xSync() method of an
+** [sqlite3_io_methods] object it uses a combination of
+** these integer values as the second argument.
+**
+** When the SQLITE_SYNC_DATAONLY flag is used, it means that the
+** sync operation only needs to flush data to mass storage.  Inode
+** information need not be flushed. If the lower four bits of the flag
+** equal SQLITE_SYNC_NORMAL, that means to use normal fsync() semantics.
+** If the lower four bits equal SQLITE_SYNC_FULL, that means
+** to use Mac OS X style fullsync instead of fsync().
+**
+** Do not confuse the SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL flags
+** with the [PRAGMA synchronous]=NORMAL and [PRAGMA synchronous]=FULL
+** settings.  The [synchronous pragma] determines when calls to the
+** xSync VFS method occur and applies uniformly across all platforms.
+** The SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL flags determine how
+** energetic or rigorous or forceful the sync operations are and
+** only make a difference on Mac OSX for the default SQLite code.
+** (Third-party VFS implementations might also make the distinction
+** between SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL, but among the
+** operating systems natively supported by SQLite, only Mac OSX
+** cares about the difference.)
+*/
+enum SQLITE_SYNC_NORMAL = 0x00002;
+enum SQLITE_SYNC_FULL = 0x00003;
+enum SQLITE_SYNC_DATAONLY = 0x00010;
+
+/*
+** CAPI3REF: OS Interface Open File Handle
+**
+** An [sqlite3_file] object represents an open file in the
+** [sqlite3_vfs | OS interface layer].  Individual OS interface
+** implementations will
+** want to subclass this object by appending additional fields
+** for their own use.  The pMethods entry is a pointer to an
+** [sqlite3_io_methods] object that defines methods for performing
+** I/O operations on the open file.
+*/
+struct sqlite3_file
+{
+ /* Methods for an open file */
+
+    /*
+    ** CAPI3REF: OS Interface File Virtual Methods Object
+    **
+    ** Every file opened by the [sqlite3_vfs.xOpen] method populates an
+    ** [sqlite3_file] object (or, more commonly, a subclass of the
+    ** [sqlite3_file] object) with a pointer to an instance of this object.
+    ** This object defines the methods used to perform various operations
+    ** against the open file represented by the [sqlite3_file] object.
+    **
+    ** If the [sqlite3_vfs.xOpen] method sets the sqlite3_file.pMethods element
+    ** to a non-NULL pointer, then the sqlite3_io_methods.xClose method
+    ** may be invoked even if the [sqlite3_vfs.xOpen] reported that it failed.  The
+    ** only way to prevent a call to xClose following a failed [sqlite3_vfs.xOpen]
+    ** is for the [sqlite3_vfs.xOpen] to set the sqlite3_file.pMethods element
+    ** to NULL.
+    **
+    ** The flags argument to xSync may be one of [SQLITE_SYNC_NORMAL] or
+    ** [SQLITE_SYNC_FULL].  The first choice is the normal fsync().
+    ** The second choice is a Mac OS X style fullsync.  The [SQLITE_SYNC_DATAONLY]
+    ** flag may be ORed in to indicate that only the data of the file
+    ** and not its inode needs to be synced.
+    **
+    ** The integer values to xLock() and xUnlock() are one of
+    ** <ul>
+    ** <li> [SQLITE_LOCK_NONE],
+    ** <li> [SQLITE_LOCK_SHARED],
+    ** <li> [SQLITE_LOCK_RESERVED],
+    ** <li> [SQLITE_LOCK_PENDING], or
+    ** <li> [SQLITE_LOCK_EXCLUSIVE].
+    ** </ul>
+    ** xLock() increases the lock. xUnlock() decreases the lock.
+    ** The xCheckReservedLock() method checks whether any database connection,
+    ** either in this process or in some other process, is holding a RESERVED,
+    ** PENDING, or EXCLUSIVE lock on the file.  It returns true
+    ** if such a lock exists and false otherwise.
+    **
+    ** The xFileControl() method is a generic interface that allows custom
+    ** VFS implementations to directly control an open file using the
+    ** [sqlite3_file_control()] interface.  The second "op" argument is an
+    ** integer opcode.  The third argument is a generic pointer intended to
+    ** point to a structure that may contain arguments or space in which to
+    ** write return values.  Potential uses for xFileControl() might be
+    ** functions to enable blocking locks with timeouts, to change the
+    ** locking strategy (for example to use dot-file locks), to inquire
+    ** about the status of a lock, or to break stale locks.  The SQLite
+    ** core reserves all opcodes less than 100 for its own use.
+    ** A [file control opcodes | list of opcodes] less than 100 is available.
+    ** Applications that define a custom xFileControl method should use opcodes
+    ** greater than 100 to avoid conflicts.  VFS implementations should
+    ** return [SQLITE_NOTFOUND] for file control opcodes that they do not
+    ** recognize.
+    **
+    ** The xSectorSize() method returns the sector size of the
+    ** device that underlies the file.  The sector size is the
+    ** minimum write that can be performed without disturbing
+    ** other bytes in the file.  The xDeviceCharacteristics()
+    ** method returns a bit vector describing behaviors of the
+    ** underlying device:
+    **
+    ** <ul>
+    ** <li> [SQLITE_IOCAP_ATOMIC]
+    ** <li> [SQLITE_IOCAP_ATOMIC512]
+    ** <li> [SQLITE_IOCAP_ATOMIC1K]
+    ** <li> [SQLITE_IOCAP_ATOMIC2K]
+    ** <li> [SQLITE_IOCAP_ATOMIC4K]
+    ** <li> [SQLITE_IOCAP_ATOMIC8K]
+    ** <li> [SQLITE_IOCAP_ATOMIC16K]
+    ** <li> [SQLITE_IOCAP_ATOMIC32K]
+    ** <li> [SQLITE_IOCAP_ATOMIC64K]
+    ** <li> [SQLITE_IOCAP_SAFE_APPEND]
+    ** <li> [SQLITE_IOCAP_SEQUENTIAL]
+    ** <li> [SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN]
+    ** <li> [SQLITE_IOCAP_POWERSAFE_OVERWRITE]
+    ** <li> [SQLITE_IOCAP_IMMUTABLE]
+    ** <li> [SQLITE_IOCAP_BATCH_ATOMIC]
+    ** </ul>
+    **
+    ** The SQLITE_IOCAP_ATOMIC property means that all writes of
+    ** any size are atomic.  The SQLITE_IOCAP_ATOMICnnn values
+    ** mean that writes of blocks that are nnn bytes in size and
+    ** are aligned to an address which is an integer multiple of
+    ** nnn are atomic.  The SQLITE_IOCAP_SAFE_APPEND value means
+    ** that when data is appended to a file, the data is appended
+    ** first then the size of the file is extended, never the other
+    ** way around.  The SQLITE_IOCAP_SEQUENTIAL property means that
+    ** information is written to disk in the same order as calls
+    ** to xWrite().
+    **
+    ** If xRead() returns SQLITE_IOERR_SHORT_READ it must also fill
+    ** in the unread portions of the buffer with zeros.  A VFS that
+    ** fails to zero-fill short reads might seem to work.  However,
+    ** failure to zero-fill short reads will eventually lead to
+    ** database corruption.
+    */
+
+    struct sqlite3_io_methods
+    {
+        int iVersion;
+        int function(sqlite3_file*) xClose;
+        int function(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst) xRead;
+        int function(sqlite3_file*, const(void)*, int iAmt, sqlite3_int64 iOfst) xWrite;
+        int function(sqlite3_file*, sqlite3_int64 size) xTruncate;
+        int function(sqlite3_file*, int flags) xSync;
+        int function(sqlite3_file*, sqlite3_int64* pSize) xFileSize;
+        int function(sqlite3_file*, int) xLock;
+        int function(sqlite3_file*, int) xUnlock;
+        int function(sqlite3_file*, int* pResOut) xCheckReservedLock;
+        int function(sqlite3_file*, int op, void* pArg) xFileControl;
+        int function(sqlite3_file*) xSectorSize;
+        int function(sqlite3_file*) xDeviceCharacteristics;
+        /* Methods above are valid for version 1 */
+        int function(sqlite3_file*, int iPg, int pgsz, int, void**) xShmMap;
+        int function(sqlite3_file*, int offset, int n, int flags) xShmLock;
+        void function(sqlite3_file*) xShmBarrier;
+        int function(sqlite3_file*, int deleteFlag) xShmUnmap;
+        /* Methods above are valid for version 2 */
+        int function(sqlite3_file*, sqlite3_int64 iOfst, int iAmt, void** pp) xFetch;
+        int function(sqlite3_file*, sqlite3_int64 iOfst, void* p) xUnfetch;
+        /* Methods above are valid for version 3 */
+        /* Additional methods may be added in future releases */
+    }
+
+    const(sqlite3_io_methods)* pMethods;
+}
+
+struct sqlite3_io_methods
+{
+    int iVersion;
+    int function(sqlite3_file*) xClose;
+    int function(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst) xRead;
+    int function(sqlite3_file*, const(void)*, int iAmt, sqlite3_int64 iOfst) xWrite;
+    int function(sqlite3_file*, sqlite3_int64 size) xTruncate;
+    int function(sqlite3_file*, int flags) xSync;
+    int function(sqlite3_file*, sqlite3_int64* pSize) xFileSize;
+    int function(sqlite3_file*, int) xLock;
+    int function(sqlite3_file*, int) xUnlock;
+    int function(sqlite3_file*, int* pResOut) xCheckReservedLock;
+    int function(sqlite3_file*, int op, void* pArg) xFileControl;
+    int function(sqlite3_file*) xSectorSize;
+    int function(sqlite3_file*) xDeviceCharacteristics;
+    int function(sqlite3_file*, int iPg, int pgsz, int, void**) xShmMap;
+    int function(sqlite3_file*, int offset, int n, int flags) xShmLock;
+    void function(sqlite3_file*) xShmBarrier;
+    int function(sqlite3_file*, int deleteFlag) xShmUnmap;
+    int function(sqlite3_file*, sqlite3_int64 iOfst, int iAmt, void** pp) xFetch;
+    int function(sqlite3_file*, sqlite3_int64 iOfst, void* p) xUnfetch;
+}
+
+/*
+** CAPI3REF: Standard File Control Opcodes
+** KEYWORDS: {file control opcodes} {file control opcode}
+**
+** These integer constants are opcodes for the xFileControl method
+** of the [sqlite3_io_methods] object and for the [sqlite3_file_control()]
+** interface.
+**
+** <ul>
+** <li>[[SQLITE_FCNTL_LOCKSTATE]]
+** The [SQLITE_FCNTL_LOCKSTATE] opcode is used for debugging.  This
+** opcode causes the xFileControl method to write the current state of
+** the lock (one of [SQLITE_LOCK_NONE], [SQLITE_LOCK_SHARED],
+** [SQLITE_LOCK_RESERVED], [SQLITE_LOCK_PENDING], or [SQLITE_LOCK_EXCLUSIVE])
+** into an integer that the pArg argument points to. This capability
+** is used during testing and is only available when the SQLITE_TEST
+** compile-time option is used.
+**
+** <li>[[SQLITE_FCNTL_SIZE_HINT]]
+** The [SQLITE_FCNTL_SIZE_HINT] opcode is used by SQLite to give the VFS
+** layer a hint of how large the database file will grow to be during the
+** current transaction.  This hint is not guaranteed to be accurate but it
+** is often close.  The underlying VFS might choose to preallocate database
+** file space based on this hint in order to help writes to the database
+** file run faster.
+**
+** <li>[[SQLITE_FCNTL_CHUNK_SIZE]]
+** The [SQLITE_FCNTL_CHUNK_SIZE] opcode is used to request that the VFS
+** extends and truncates the database file in chunks of a size specified
+** by the user. The fourth argument to [sqlite3_file_control()] should
+** point to an integer (type int) containing the new chunk-size to use
+** for the nominated database. Allocating database file space in large
+** chunks (say 1MB at a time), may reduce file-system fragmentation and
+** improve performance on some systems.
+**
+** <li>[[SQLITE_FCNTL_FILE_POINTER]]
+** The [SQLITE_FCNTL_FILE_POINTER] opcode is used to obtain a pointer
+** to the [sqlite3_file] object associated with a particular database
+** connection.  See also [SQLITE_FCNTL_JOURNAL_POINTER].
+**
+** <li>[[SQLITE_FCNTL_JOURNAL_POINTER]]
+** The [SQLITE_FCNTL_JOURNAL_POINTER] opcode is used to obtain a pointer
+** to the [sqlite3_file] object associated with the journal file (either
+** the [rollback journal] or the [write-ahead log]) for a particular database
+** connection.  See also [SQLITE_FCNTL_FILE_POINTER].
+**
+** <li>[[SQLITE_FCNTL_SYNC_OMITTED]]
+** No longer in use.
+**
+** <li>[[SQLITE_FCNTL_SYNC]]
+** The [SQLITE_FCNTL_SYNC] opcode is generated internally by SQLite and
+** sent to the VFS immediately before the xSync method is invoked on a
+** database file descriptor. Or, if the xSync method is not invoked
+** because the user has configured SQLite with
+** [PRAGMA synchronous | PRAGMA synchronous=OFF] it is invoked in place
+** of the xSync method. In most cases, the pointer argument passed with
+** this file-control is NULL. However, if the database file is being synced
+** as part of a multi-database commit, the argument points to a nul-terminated
+** string containing the transactions master-journal file name. VFSes that
+** do not need this signal should silently ignore this opcode. Applications
+** should not call [sqlite3_file_control()] with this opcode as doing so may
+** disrupt the operation of the specialized VFSes that do require it.
+**
+** <li>[[SQLITE_FCNTL_COMMIT_PHASETWO]]
+** The [SQLITE_FCNTL_COMMIT_PHASETWO] opcode is generated internally by SQLite
+** and sent to the VFS after a transaction has been committed immediately
+** but before the database is unlocked. VFSes that do not need this signal
+** should silently ignore this opcode. Applications should not call
+** [sqlite3_file_control()] with this opcode as doing so may disrupt the
+** operation of the specialized VFSes that do require it.
+**
+** <li>[[SQLITE_FCNTL_WIN32_AV_RETRY]]
+** ^The [SQLITE_FCNTL_WIN32_AV_RETRY] opcode is used to configure automatic
+** retry counts and intervals for certain disk I/O operations for the
+** windows [VFS] in order to provide robustness in the presence of
+** anti-virus programs.  By default, the windows VFS will retry file read,
+** file write, and file delete operations up to 10 times, with a delay
+** of 25 milliseconds before the first retry and with the delay increasing
+** by an additional 25 milliseconds with each subsequent retry.  This
+** opcode allows these two values (10 retries and 25 milliseconds of delay)
+** to be adjusted.  The values are changed for all database connections
+** within the same process.  The argument is a pointer to an array of two
+** integers where the first integer is the new retry count and the second
+** integer is the delay.  If either integer is negative, then the setting
+** is not changed but instead the prior value of that setting is written
+** into the array entry, allowing the current retry settings to be
+** interrogated.  The zDbName parameter is ignored.
+**
+** <li>[[SQLITE_FCNTL_PERSIST_WAL]]
+** ^The [SQLITE_FCNTL_PERSIST_WAL] opcode is used to set or query the
+** persistent [WAL | Write Ahead Log] setting.  By default, the auxiliary
+** write ahead log ([WAL file]) and shared memory
+** files used for transaction control
+** are automatically deleted when the latest connection to the database
+** closes.  Setting persistent WAL mode causes those files to persist after
+** close.  Persisting the files is useful when other processes that do not
+** have write permission on the directory containing the database file want
+** to read the database file, as the WAL and shared memory files must exist
+** in order for the database to be readable.  The fourth parameter to
+** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
+** That integer is 0 to disable persistent WAL mode or 1 to enable persistent
+** WAL mode.  If the integer is -1, then it is overwritten with the current
+** WAL persistence setting.
+**
+** <li>[[SQLITE_FCNTL_POWERSAFE_OVERWRITE]]
+** ^The [SQLITE_FCNTL_POWERSAFE_OVERWRITE] opcode is used to set or query the
+** persistent "powersafe-overwrite" or "PSOW" setting.  The PSOW setting
+** determines the [SQLITE_IOCAP_POWERSAFE_OVERWRITE] bit of the
+** xDeviceCharacteristics methods. The fourth parameter to
+** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
+** That integer is 0 to disable zero-damage mode or 1 to enable zero-damage
+** mode.  If the integer is -1, then it is overwritten with the current
+** zero-damage mode setting.
+**
+** <li>[[SQLITE_FCNTL_OVERWRITE]]
+** ^The [SQLITE_FCNTL_OVERWRITE] opcode is invoked by SQLite after opening
+** a write transaction to indicate that, unless it is rolled back for some
+** reason, the entire database file will be overwritten by the current
+** transaction. This is used by VACUUM operations.
+**
+** <li>[[SQLITE_FCNTL_VFSNAME]]
+** ^The [SQLITE_FCNTL_VFSNAME] opcode can be used to obtain the names of
+** all [VFSes] in the VFS stack.  The names are of all VFS shims and the
+** final bottom-level VFS are written into memory obtained from
+** [sqlite3_malloc()] and the result is stored in the char* variable
+** that the fourth parameter of [sqlite3_file_control()] points to.
+** The caller is responsible for freeing the memory when done.  As with
+** all file-control actions, there is no guarantee that this will actually
+** do anything.  Callers should initialize the char* variable to a NULL
+** pointer in case this file-control is not implemented.  This file-control
+** is intended for diagnostic use only.
+**
+** <li>[[SQLITE_FCNTL_VFS_POINTER]]
+** ^The [SQLITE_FCNTL_VFS_POINTER] opcode finds a pointer to the top-level
+** [VFSes] currently in use.  ^(The argument X in
+** sqlite3_file_control(db,SQLITE_FCNTL_VFS_POINTER,X) must be
+** of type "[sqlite3_vfs] **".  This opcodes will set *X
+** to a pointer to the top-level VFS.)^
+** ^When there are multiple VFS shims in the stack, this opcode finds the
+** upper-most shim only.
+**
+** <li>[[SQLITE_FCNTL_PRAGMA]]
+** ^Whenever a [PRAGMA] statement is parsed, an [SQLITE_FCNTL_PRAGMA]
+** file control is sent to the open [sqlite3_file] object corresponding
+** to the database file to which the pragma statement refers. ^The argument
+** to the [SQLITE_FCNTL_PRAGMA] file control is an array of
+** pointers to strings (char**) in which the second element of the array
+** is the name of the pragma and the third element is the argument to the
+** pragma or NULL if the pragma has no argument.  ^The handler for an
+** [SQLITE_FCNTL_PRAGMA] file control can optionally make the first element
+** of the char** argument point to a string obtained from [sqlite3_mprintf()]
+** or the equivalent and that string will become the result of the pragma or
+** the error message if the pragma fails. ^If the
+** [SQLITE_FCNTL_PRAGMA] file control returns [SQLITE_NOTFOUND], then normal
+** [PRAGMA] processing continues.  ^If the [SQLITE_FCNTL_PRAGMA]
+** file control returns [SQLITE_OK], then the parser assumes that the
+** VFS has handled the PRAGMA itself and the parser generates a no-op
+** prepared statement if result string is NULL, or that returns a copy
+** of the result string if the string is non-NULL.
+** ^If the [SQLITE_FCNTL_PRAGMA] file control returns
+** any result code other than [SQLITE_OK] or [SQLITE_NOTFOUND], that means
+** that the VFS encountered an error while handling the [PRAGMA] and the
+** compilation of the PRAGMA fails with an error.  ^The [SQLITE_FCNTL_PRAGMA]
+** file control occurs at the beginning of pragma statement analysis and so
+** it is able to override built-in [PRAGMA] statements.
+**
+** <li>[[SQLITE_FCNTL_BUSYHANDLER]]
+** ^The [SQLITE_FCNTL_BUSYHANDLER]
+** file-control may be invoked by SQLite on the database file handle
+** shortly after it is opened in order to provide a custom VFS with access
+** to the connections busy-handler callback. The argument is of type (void **)
+** - an array of two (void *) values. The first (void *) actually points
+** to a function of type (int (*)(void *)). In order to invoke the connections
+** busy-handler, this function should be invoked with the second (void *) in
+** the array as the only argument. If it returns non-zero, then the operation
+** should be retried. If it returns zero, the custom VFS should abandon the
+** current operation.
+**
+** <li>[[SQLITE_FCNTL_TEMPFILENAME]]
+** ^Application can invoke the [SQLITE_FCNTL_TEMPFILENAME] file-control
+** to have SQLite generate a
+** temporary filename using the same algorithm that is followed to generate
+** temporary filenames for TEMP tables and other internal uses.  The
+** argument should be a char** which will be filled with the filename
+** written into memory obtained from [sqlite3_malloc()].  The caller should
+** invoke [sqlite3_free()] on the result to avoid a memory leak.
+**
+** <li>[[SQLITE_FCNTL_MMAP_SIZE]]
+** The [SQLITE_FCNTL_MMAP_SIZE] file control is used to query or set the
+** maximum number of bytes that will be used for memory-mapped I/O.
+** The argument is a pointer to a value of type sqlite3_int64 that
+** is an advisory maximum number of bytes in the file to memory map.  The
+** pointer is overwritten with the old value.  The limit is not changed if
+** the value originally pointed to is negative, and so the current limit
+** can be queried by passing in a pointer to a negative number.  This
+** file-control is used internally to implement [PRAGMA mmap_size].
+**
+** <li>[[SQLITE_FCNTL_TRACE]]
+** The [SQLITE_FCNTL_TRACE] file control provides advisory information
+** to the VFS about what the higher layers of the SQLite stack are doing.
+** This file control is used by some VFS activity tracing [shims].
+** The argument is a zero-terminated string.  Higher layers in the
+** SQLite stack may generate instances of this file control if
+** the [SQLITE_USE_FCNTL_TRACE] compile-time option is enabled.
+**
+** <li>[[SQLITE_FCNTL_HAS_MOVED]]
+** The [SQLITE_FCNTL_HAS_MOVED] file control interprets its argument as a
+** pointer to an integer and it writes a boolean into that integer depending
+** on whether or not the file has been renamed, moved, or deleted since it
+** was first opened.
+**
+** <li>[[SQLITE_FCNTL_WIN32_GET_HANDLE]]
+** The [SQLITE_FCNTL_WIN32_GET_HANDLE] opcode can be used to obtain the
+** underlying native file handle associated with a file handle.  This file
+** control interprets its argument as a pointer to a native file handle and
+** writes the resulting value there.
+**
+** <li>[[SQLITE_FCNTL_WIN32_SET_HANDLE]]
+** The [SQLITE_FCNTL_WIN32_SET_HANDLE] opcode is used for debugging.  This
+** opcode causes the xFileControl method to swap the file handle with the one
+** pointed to by the pArg argument.  This capability is used during testing
+** and only needs to be supported when SQLITE_TEST is defined.
+**
+** <li>[[SQLITE_FCNTL_WAL_BLOCK]]
+** The [SQLITE_FCNTL_WAL_BLOCK] is a signal to the VFS layer that it might
+** be advantageous to block on the next WAL lock if the lock is not immediately
+** available.  The WAL subsystem issues this signal during rare
+** circumstances in order to fix a problem with priority inversion.
+** Applications should <em>not</em> use this file-control.
+**
+** <li>[[SQLITE_FCNTL_ZIPVFS]]
+** The [SQLITE_FCNTL_ZIPVFS] opcode is implemented by zipvfs only. All other
+** VFS should return SQLITE_NOTFOUND for this opcode.
+**
+** <li>[[SQLITE_FCNTL_RBU]]
+** The [SQLITE_FCNTL_RBU] opcode is implemented by the special VFS used by
+** the RBU extension only.  All other VFS should return SQLITE_NOTFOUND for
+** this opcode.
+**
+** <li>[[SQLITE_FCNTL_BEGIN_ATOMIC_WRITE]]
+** If the [SQLITE_FCNTL_BEGIN_ATOMIC_WRITE] opcode returns SQLITE_OK, then
+** the file descriptor is placed in "batch write mode", which
+** means all subsequent write operations will be deferred and done
+** atomically at the next [SQLITE_FCNTL_COMMIT_ATOMIC_WRITE].  Systems
+** that do not support batch atomic writes will return SQLITE_NOTFOUND.
+** ^Following a successful SQLITE_FCNTL_BEGIN_ATOMIC_WRITE and prior to
+** the closing [SQLITE_FCNTL_COMMIT_ATOMIC_WRITE] or
+** [SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE], SQLite will make
+** no VFS interface calls on the same [sqlite3_file] file descriptor
+** except for calls to the xWrite method and the xFileControl method
+** with [SQLITE_FCNTL_SIZE_HINT].
+**
+** <li>[[SQLITE_FCNTL_COMMIT_ATOMIC_WRITE]]
+** The [SQLITE_FCNTL_COMMIT_ATOMIC_WRITE] opcode causes all write
+** operations since the previous successful call to
+** [SQLITE_FCNTL_BEGIN_ATOMIC_WRITE] to be performed atomically.
+** This file control returns [SQLITE_OK] if and only if the writes were
+** all performed successfully and have been committed to persistent storage.
+** ^Regardless of whether or not it is successful, this file control takes
+** the file descriptor out of batch write mode so that all subsequent
+** write operations are independent.
+** ^SQLite will never invoke SQLITE_FCNTL_COMMIT_ATOMIC_WRITE without
+** a prior successful call to [SQLITE_FCNTL_BEGIN_ATOMIC_WRITE].
+**
+** <li>[[SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE]]
+** The [SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE] opcode causes all write
+** operations since the previous successful call to
+** [SQLITE_FCNTL_BEGIN_ATOMIC_WRITE] to be rolled back.
+** ^This file control takes the file descriptor out of batch write mode
+** so that all subsequent write operations are independent.
+** ^SQLite will never invoke SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE without
+** a prior successful call to [SQLITE_FCNTL_BEGIN_ATOMIC_WRITE].
+**
+** <li>[[SQLITE_FCNTL_LOCK_TIMEOUT]]
+** The [SQLITE_FCNTL_LOCK_TIMEOUT] opcode causes attempts to obtain
+** a file lock using the xLock or xShmLock methods of the VFS to wait
+** for up to M milliseconds before failing, where M is the single
+** unsigned integer parameter.
+**
+** <li>[[SQLITE_FCNTL_DATA_VERSION]]
+** The [SQLITE_FCNTL_DATA_VERSION] opcode is used to detect changes to
+** a database file.  The argument is a pointer to a 32-bit unsigned integer.
+** The "data version" for the pager is written into the pointer.  The
+** "data version" changes whenever any change occurs to the corresponding
+** database file, either through SQL statements on the same database
+** connection or through transactions committed by separate database
+** connections possibly in other processes. The [sqlite3_total_changes()]
+** interface can be used to find if any database on the connection has changed,
+** but that interface responds to changes on TEMP as well as MAIN and does
+** not provide a mechanism to detect changes to MAIN only.  Also, the
+** [sqlite3_total_changes()] interface responds to internal changes only and
+** omits changes made by other database connections.  The
+** [PRAGMA data_version] command provide a mechanism to detect changes to
+** a single attached database that occur due to other database connections,
+** but omits changes implemented by the database connection on which it is
+** called.  This file control is the only mechanism to detect changes that
+** happen either internally or externally and that are associated with
+** a particular attached database.
+** </ul>
+*/
+enum SQLITE_FCNTL_LOCKSTATE = 1;
+enum SQLITE_FCNTL_GET_LOCKPROXYFILE = 2;
+enum SQLITE_FCNTL_SET_LOCKPROXYFILE = 3;
+enum SQLITE_FCNTL_LAST_ERRNO = 4;
+enum SQLITE_FCNTL_SIZE_HINT = 5;
+enum SQLITE_FCNTL_CHUNK_SIZE = 6;
+enum SQLITE_FCNTL_FILE_POINTER = 7;
+enum SQLITE_FCNTL_SYNC_OMITTED = 8;
+enum SQLITE_FCNTL_WIN32_AV_RETRY = 9;
+enum SQLITE_FCNTL_PERSIST_WAL = 10;
+enum SQLITE_FCNTL_OVERWRITE = 11;
+enum SQLITE_FCNTL_VFSNAME = 12;
+enum SQLITE_FCNTL_POWERSAFE_OVERWRITE = 13;
+enum SQLITE_FCNTL_PRAGMA = 14;
+enum SQLITE_FCNTL_BUSYHANDLER = 15;
+enum SQLITE_FCNTL_TEMPFILENAME = 16;
+enum SQLITE_FCNTL_MMAP_SIZE = 18;
+enum SQLITE_FCNTL_TRACE = 19;
+enum SQLITE_FCNTL_HAS_MOVED = 20;
+enum SQLITE_FCNTL_SYNC = 21;
+enum SQLITE_FCNTL_COMMIT_PHASETWO = 22;
+enum SQLITE_FCNTL_WIN32_SET_HANDLE = 23;
+enum SQLITE_FCNTL_WAL_BLOCK = 24;
+enum SQLITE_FCNTL_ZIPVFS = 25;
+enum SQLITE_FCNTL_RBU = 26;
+enum SQLITE_FCNTL_VFS_POINTER = 27;
+enum SQLITE_FCNTL_JOURNAL_POINTER = 28;
+enum SQLITE_FCNTL_WIN32_GET_HANDLE = 29;
+enum SQLITE_FCNTL_PDB = 30;
+enum SQLITE_FCNTL_BEGIN_ATOMIC_WRITE = 31;
+enum SQLITE_FCNTL_COMMIT_ATOMIC_WRITE = 32;
+enum SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE = 33;
+enum SQLITE_FCNTL_LOCK_TIMEOUT = 34;
+enum SQLITE_FCNTL_DATA_VERSION = 35;
+
+/* deprecated names */
+enum SQLITE_GET_LOCKPROXYFILE = SQLITE_FCNTL_GET_LOCKPROXYFILE;
+enum SQLITE_SET_LOCKPROXYFILE = SQLITE_FCNTL_SET_LOCKPROXYFILE;
+enum SQLITE_LAST_ERRNO = SQLITE_FCNTL_LAST_ERRNO;
+
+/*
+** CAPI3REF: Mutex Handle
+**
+** The mutex module within SQLite defines [sqlite3_mutex] to be an
+** abstract type for a mutex object.  The SQLite core never looks
+** at the internal representation of an [sqlite3_mutex].  It only
+** deals with pointers to the [sqlite3_mutex] object.
+**
+** Mutexes are created using [sqlite3_mutex_alloc()].
+*/
+struct sqlite3_mutex;
+
+/*
+** CAPI3REF: Loadable Extension Thunk
+**
+** A pointer to the opaque sqlite3_api_routines structure is passed as
+** the third parameter to entry points of [loadable extensions].  This
+** structure must be typedefed in order to work around compiler warnings
+** on some platforms.
+*/
+struct sqlite3_api_routines;
+
+/*
+** CAPI3REF: OS Interface Object
+**
+** An instance of the sqlite3_vfs object defines the interface between
+** the SQLite core and the underlying operating system.  The "vfs"
+** in the name of the object stands for "virtual file system".  See
+** the [VFS | VFS documentation] for further information.
+**
+** The VFS interface is sometimes extended by adding new methods onto
+** the end.  Each time such an extension occurs, the iVersion field
+** is incremented.  The iVersion value started out as 1 in
+** SQLite [version 3.5.0] on [dateof:3.5.0], then increased to 2
+** with SQLite [version 3.7.0] on [dateof:3.7.0], and then increased
+** to 3 with SQLite [version 3.7.6] on [dateof:3.7.6].  Additional fields
+** may be appended to the sqlite3_vfs object and the iVersion value
+** may increase again in future versions of SQLite.
+** Note that the structure
+** of the sqlite3_vfs object changes in the transition from
+** SQLite [version 3.5.9] to [version 3.6.0] on [dateof:3.6.0]
+** and yet the iVersion field was not modified.
+**
+** The szOsFile field is the size of the subclassed [sqlite3_file]
+** structure used by this VFS.  mxPathname is the maximum length of
+** a pathname in this VFS.
+**
+** Registered sqlite3_vfs objects are kept on a linked list formed by
+** the pNext pointer.  The [sqlite3_vfs_register()]
+** and [sqlite3_vfs_unregister()] interfaces manage this list
+** in a thread-safe way.  The [sqlite3_vfs_find()] interface
+** searches the list.  Neither the application code nor the VFS
+** implementation should use the pNext pointer.
+**
+** The pNext field is the only field in the sqlite3_vfs
+** structure that SQLite will ever modify.  SQLite will only access
+** or modify this field while holding a particular static mutex.
+** The application should never modify anything within the sqlite3_vfs
+** object once the object has been registered.
+**
+** The zName field holds the name of the VFS module.  The name must
+** be unique across all VFS modules.
+**
+** [[sqlite3_vfs.xOpen]]
+** ^SQLite guarantees that the zFilename parameter to xOpen
+** is either a NULL pointer or string obtained
+** from xFullPathname() with an optional suffix added.
+** ^If a suffix is added to the zFilename parameter, it will
+** consist of a single "-" character followed by no more than
+** 11 alphanumeric and/or "-" characters.
+** ^SQLite further guarantees that
+** the string will be valid and unchanged until xClose() is
+** called. Because of the previous sentence,
+** the [sqlite3_file] can safely store a pointer to the
+** filename if it needs to remember the filename for some reason.
+** If the zFilename parameter to xOpen is a NULL pointer then xOpen
+** must invent its own temporary name for the file.  ^Whenever the
+** xFilename parameter is NULL it will also be the case that the
+** flags parameter will include [SQLITE_OPEN_DELETEONCLOSE].
+**
+** The flags argument to xOpen() includes all bits set in
+** the flags argument to [sqlite3_open_v2()].  Or if [sqlite3_open()]
+** or [sqlite3_open16()] is used, then flags includes at least
+** [SQLITE_OPEN_READWRITE] | [SQLITE_OPEN_CREATE].
+** If xOpen() opens a file read-only then it sets *pOutFlags to
+** include [SQLITE_OPEN_READONLY].  Other bits in *pOutFlags may be set.
+**
+** ^(SQLite will also add one of the following flags to the xOpen()
+** call, depending on the object being opened:
+**
+** <ul>
+** <li>  [SQLITE_OPEN_MAIN_DB]
+** <li>  [SQLITE_OPEN_MAIN_JOURNAL]
+** <li>  [SQLITE_OPEN_TEMP_DB]
+** <li>  [SQLITE_OPEN_TEMP_JOURNAL]
+** <li>  [SQLITE_OPEN_TRANSIENT_DB]
+** <li>  [SQLITE_OPEN_SUBJOURNAL]
+** <li>  [SQLITE_OPEN_MASTER_JOURNAL]
+** <li>  [SQLITE_OPEN_WAL]
+** </ul>)^
+**
+** The file I/O implementation can use the object type flags to
+** change the way it deals with files.  For example, an application
+** that does not care about crash recovery or rollback might make
+** the open of a journal file a no-op.  Writes to this journal would
+** also be no-ops, and any attempt to read the journal would return
+** SQLITE_IOERR.  Or the implementation might recognize that a database
+** file will be doing page-aligned sector reads and writes in a random
+** order and set up its I/O subsystem accordingly.
+**
+** SQLite might also add one of the following flags to the xOpen method:
+**
+** <ul>
+** <li> [SQLITE_OPEN_DELETEONCLOSE]
+** <li> [SQLITE_OPEN_EXCLUSIVE]
+** </ul>
+**
+** The [SQLITE_OPEN_DELETEONCLOSE] flag means the file should be
+** deleted when it is closed.  ^The [SQLITE_OPEN_DELETEONCLOSE]
+** will be set for TEMP databases and their journals, transient
+** databases, and subjournals.
+**
+** ^The [SQLITE_OPEN_EXCLUSIVE] flag is always used in conjunction
+** with the [SQLITE_OPEN_CREATE] flag, which are both directly
+** analogous to the O_EXCL and O_CREAT flags of the POSIX open()
+** API.  The SQLITE_OPEN_EXCLUSIVE flag, when paired with the
+** SQLITE_OPEN_CREATE, is used to indicate that file should always
+** be created, and that it is an error if it already exists.
+** It is <i>not</i> used to indicate the file should be opened
+** for exclusive access.
+**
+** ^At least szOsFile bytes of memory are allocated by SQLite
+** to hold the  [sqlite3_file] structure passed as the third
+** argument to xOpen.  The xOpen method does not have to
+** allocate the structure; it should just fill it in.  Note that
+** the xOpen method must set the sqlite3_file.pMethods to either
+** a valid [sqlite3_io_methods] object or to NULL.  xOpen must do
+** this even if the open fails.  SQLite expects that the sqlite3_file.pMethods
+** element will be valid after xOpen returns regardless of the success
+** or failure of the xOpen call.
+**
+** [[sqlite3_vfs.xAccess]]
+** ^The flags argument to xAccess() may be [SQLITE_ACCESS_EXISTS]
+** to test for the existence of a file, or [SQLITE_ACCESS_READWRITE] to
+** test whether a file is readable and writable, or [SQLITE_ACCESS_READ]
+** to test whether a file is at least readable.   The file can be a
+** directory.
+**
+** ^SQLite will always allocate at least mxPathname+1 bytes for the
+** output buffer xFullPathname.  The exact size of the output buffer
+** is also passed as a parameter to both  methods. If the output buffer
+** is not large enough, [SQLITE_CANTOPEN] should be returned. Since this is
+** handled as a fatal error by SQLite, vfs implementations should endeavor
+** to prevent this by setting mxPathname to a sufficiently large value.
+**
+** The xRandomness(), xSleep(), xCurrentTime(), and xCurrentTimeInt64()
+** interfaces are not strictly a part of the filesystem, but they are
+** included in the VFS structure for completeness.
+** The xRandomness() function attempts to return nBytes bytes
+** of good-quality randomness into zOut.  The return value is
+** the actual number of bytes of randomness obtained.
+** The xSleep() method causes the calling thread to sleep for at
+** least the number of microseconds given.  ^The xCurrentTime()
+** method returns a Julian Day Number for the current date and time as
+** a floating point value.
+** ^The xCurrentTimeInt64() method returns, as an integer, the Julian
+** Day Number multiplied by 86400000 (the number of milliseconds in
+** a 24-hour day).
+** ^SQLite will use the xCurrentTimeInt64() method to get the current
+** date and time if that method is available (if iVersion is 2 or
+** greater and the function pointer is not NULL) and will fall back
+** to xCurrentTime() if xCurrentTimeInt64() is unavailable.
+**
+** ^The xSetSystemCall(), xGetSystemCall(), and xNestSystemCall() interfaces
+** are not used by the SQLite core.  These optional interfaces are provided
+** by some VFSes to facilitate testing of the VFS code. By overriding
+** system calls with functions under its control, a test program can
+** simulate faults and error conditions that would otherwise be difficult
+** or impossible to induce.  The set of system calls that can be overridden
+** varies from one VFS to another, and from one version of the same VFS to the
+** next.  Applications that use these interfaces must be prepared for any
+** or all of these interfaces to be NULL or for their behavior to change
+** from one release to the next.  Applications must not attempt to access
+** any of these methods if the iVersion of the VFS is less than 3.
+*/
+alias sqlite3_syscall_ptr = void function();
+
+struct sqlite3_vfs
+{
+    int iVersion; /* Structure version number (currently 3) */
+    int szOsFile; /* Size of subclassed sqlite3_file */
+    int mxPathname; /* Maximum file pathname length */
+    sqlite3_vfs* pNext; /* Next registered VFS */
+    const(char)* zName; /* Name of this virtual file system */
+    void* pAppData; /* Pointer to application-specific data */
+    int function(sqlite3_vfs*, const(char)* zName, sqlite3_file*, int flags, int* pOutFlags) xOpen;
+    int function(sqlite3_vfs*, const(char)* zName, int syncDir) xDelete;
+    int function(sqlite3_vfs*, const(char)* zName, int flags, int* pResOut) xAccess;
+    int function(sqlite3_vfs*, const(char)* zName, int nOut, char* zOut) xFullPathname;
+    void* function(sqlite3_vfs*, const(char)* zFilename) xDlOpen;
+    void function(sqlite3_vfs*, int nByte, char* zErrMsg) xDlError;
+    void function(sqlite3_vfs*, void*, const(char)* zSymbol) function(sqlite3_vfs*, void*, const(char)* zSymbol) xDlSym;
+    void function(sqlite3_vfs*, void*) xDlClose;
+    int function(sqlite3_vfs*, int nByte, char* zOut) xRandomness;
+    int function(sqlite3_vfs*, int microseconds) xSleep;
+    int function(sqlite3_vfs*, double*) xCurrentTime;
+    int function(sqlite3_vfs*, int, char*) xGetLastError;
+    /*
+    ** The methods above are in version 1 of the sqlite_vfs object
+    ** definition.  Those that follow are added in version 2 or later
+    */
+    int function(sqlite3_vfs*, sqlite3_int64*) xCurrentTimeInt64;
+    /*
+    ** The methods above are in versions 1 and 2 of the sqlite_vfs object.
+    ** Those below are for version 3 and greater.
+    */
+    int function(sqlite3_vfs*, const(char)* zName, sqlite3_syscall_ptr) xSetSystemCall;
+    sqlite3_syscall_ptr function(sqlite3_vfs*, const(char)* zName) xGetSystemCall;
+    const(char)* function(sqlite3_vfs*, const(char)* zName) xNextSystemCall;
+    /*
+    ** The methods above are in versions 1 through 3 of the sqlite_vfs object.
+    ** New fields may be appended in future versions.  The iVersion
+    ** value will increment whenever this happens.
+    */
+}
+
+/*
+** CAPI3REF: Flags for the xAccess VFS method
+**
+** These integer constants can be used as the third parameter to
+** the xAccess method of an [sqlite3_vfs] object.  They determine
+** what kind of permissions the xAccess method is looking for.
+** With SQLITE_ACCESS_EXISTS, the xAccess method
+** simply checks whether the file exists.
+** With SQLITE_ACCESS_READWRITE, the xAccess method
+** checks whether the named directory is both readable and writable
+** (in other words, if files can be added, removed, and renamed within
+** the directory).
+** The SQLITE_ACCESS_READWRITE constant is currently used only by the
+** [temp_store_directory pragma], though this could change in a future
+** release of SQLite.
+** With SQLITE_ACCESS_READ, the xAccess method
+** checks whether the file is readable.  The SQLITE_ACCESS_READ constant is
+** currently unused, though it might be used in a future release of
+** SQLite.
+*/
+enum SQLITE_ACCESS_EXISTS = 0;
+enum SQLITE_ACCESS_READWRITE = 1; /* Used by PRAGMA temp_store_directory */
+enum SQLITE_ACCESS_READ = 2; /* Unused */
+
+/*
+** CAPI3REF: Flags for the xShmLock VFS method
+**
+** These integer constants define the various locking operations
+** allowed by the xShmLock method of [sqlite3_io_methods].  The
+** following are the only legal combinations of flags to the
+** xShmLock method:
+**
+** <ul>
+** <li>  SQLITE_SHM_LOCK | SQLITE_SHM_SHARED
+** <li>  SQLITE_SHM_LOCK | SQLITE_SHM_EXCLUSIVE
+** <li>  SQLITE_SHM_UNLOCK | SQLITE_SHM_SHARED
+** <li>  SQLITE_SHM_UNLOCK | SQLITE_SHM_EXCLUSIVE
+** </ul>
+**
+** When unlocking, the same SHARED or EXCLUSIVE flag must be supplied as
+** was given on the corresponding lock.
+**
+** The xShmLock method can transition between unlocked and SHARED or
+** between unlocked and EXCLUSIVE.  It cannot transition between SHARED
+** and EXCLUSIVE.
+*/
+enum SQLITE_SHM_UNLOCK = 1;
+enum SQLITE_SHM_LOCK = 2;
+enum SQLITE_SHM_SHARED = 4;
+enum SQLITE_SHM_EXCLUSIVE = 8;
+
+/*
+** CAPI3REF: Maximum xShmLock index
+**
+** The xShmLock method on [sqlite3_io_methods] may use values
+** between 0 and this upper bound as its "offset" argument.
+** The SQLite core will never attempt to acquire or release a
+** lock outside of this range
+*/
+enum SQLITE_SHM_NLOCK = 8;
+
+/*
+** CAPI3REF: Initialize The SQLite Library
+**
+** ^The sqlite3_initialize() routine initializes the
+** SQLite library.  ^The sqlite3_shutdown() routine
+** deallocates any resources that were allocated by sqlite3_initialize().
+** These routines are designed to aid in process initialization and
+** shutdown on embedded systems.  Workstation applications using
+** SQLite normally do not need to invoke either of these routines.
+**
+** A call to sqlite3_initialize() is an "effective" call if it is
+** the first time sqlite3_initialize() is invoked during the lifetime of
+** the process, or if it is the first time sqlite3_initialize() is invoked
+** following a call to sqlite3_shutdown().  ^(Only an effective call
+** of sqlite3_initialize() does any initialization.  All other calls
+** are harmless no-ops.)^
+**
+** A call to sqlite3_shutdown() is an "effective" call if it is the first
+** call to sqlite3_shutdown() since the last sqlite3_initialize().  ^(Only
+** an effective call to sqlite3_shutdown() does any deinitialization.
+** All other valid calls to sqlite3_shutdown() are harmless no-ops.)^
+**
+** The sqlite3_initialize() interface is threadsafe, but sqlite3_shutdown()
+** is not.  The sqlite3_shutdown() interface must only be called from a
+** single thread.  All open [database connections] must be closed and all
+** other SQLite resources must be deallocated prior to invoking
+** sqlite3_shutdown().
+**
+** Among other things, ^sqlite3_initialize() will invoke
+** sqlite3_os_init().  Similarly, ^sqlite3_shutdown()
+** will invoke sqlite3_os_end().
+**
+** ^The sqlite3_initialize() routine returns [SQLITE_OK] on success.
+** ^If for some reason, sqlite3_initialize() is unable to initialize
+** the library (perhaps it is unable to allocate a needed resource such
+** as a mutex) it returns an [error code] other than [SQLITE_OK].
+**
+** ^The sqlite3_initialize() routine is called internally by many other
+** SQLite interfaces so that an application usually does not need to
+** invoke sqlite3_initialize() directly.  For example, [sqlite3_open()]
+** calls sqlite3_initialize() so the SQLite library will be automatically
+** initialized when [sqlite3_open()] is called if it has not be initialized
+** already.  ^However, if SQLite is compiled with the [SQLITE_OMIT_AUTOINIT]
+** compile-time option, then the automatic calls to sqlite3_initialize()
+** are omitted and the application must call sqlite3_initialize() directly
+** prior to using any other SQLite interface.  For maximum portability,
+** it is recommended that applications always invoke sqlite3_initialize()
+** directly prior to using any other SQLite interface.  Future releases
+** of SQLite may require this.  In other words, the behavior exhibited
+** when SQLite is compiled with [SQLITE_OMIT_AUTOINIT] might become the
+** default behavior in some future release of SQLite.
+**
+** The sqlite3_os_init() routine does operating-system specific
+** initialization of the SQLite library.  The sqlite3_os_end()
+** routine undoes the effect of sqlite3_os_init().  Typical tasks
+** performed by these routines include allocation or deallocation
+** of static resources, initialization of global variables,
+** setting up a default [sqlite3_vfs] module, or setting up
+** a default configuration using [sqlite3_config()].
+**
+** The application should never invoke either sqlite3_os_init()
+** or sqlite3_os_end() directly.  The application should only invoke
+** sqlite3_initialize() and sqlite3_shutdown().  The sqlite3_os_init()
+** interface is called automatically by sqlite3_initialize() and
+** sqlite3_os_end() is called by sqlite3_shutdown().  Appropriate
+** implementations for sqlite3_os_init() and sqlite3_os_end()
+** are built into SQLite when it is compiled for Unix, Windows, or OS/2.
+** When [custom builds | built for other platforms]
+** (using the [SQLITE_OS_OTHER=1] compile-time
+** option) the application must supply a suitable implementation for
+** sqlite3_os_init() and sqlite3_os_end().  An application-supplied
+** implementation of sqlite3_os_init() or sqlite3_os_end()
+** must return [SQLITE_OK] on success and some other [error code] upon
+** failure.
+*/
+int sqlite3_initialize();
+int sqlite3_shutdown();
+int sqlite3_os_init();
+int sqlite3_os_end();
+
+/*
+** CAPI3REF: Configuring The SQLite Library
+**
+** The sqlite3_config() interface is used to make global configuration
+** changes to SQLite in order to tune SQLite to the specific needs of
+** the application.  The default configuration is recommended for most
+** applications and so this routine is usually not necessary.  It is
+** provided to support rare applications with unusual needs.
+**
+** <b>The sqlite3_config() interface is not threadsafe. The application
+** must ensure that no other SQLite interfaces are invoked by other
+** threads while sqlite3_config() is running.</b>
+**
+** The sqlite3_config() interface
+** may only be invoked prior to library initialization using
+** [sqlite3_initialize()] or after shutdown by [sqlite3_shutdown()].
+** ^If sqlite3_config() is called after [sqlite3_initialize()] and before
+** [sqlite3_shutdown()] then it will return SQLITE_MISUSE.
+** Note, however, that ^sqlite3_config() can be called as part of the
+** implementation of an application-defined [sqlite3_os_init()].
+**
+** The first argument to sqlite3_config() is an integer
+** [configuration option] that determines
+** what property of SQLite is to be configured.  Subsequent arguments
+** vary depending on the [configuration option]
+** in the first argument.
+**
+** ^When a configuration option is set, sqlite3_config() returns [SQLITE_OK].
+** ^If the option is unknown or SQLite is unable to set the option
+** then this routine returns a non-zero [error code].
+*/
+int sqlite3_config(int, ...);
+
+/*
+** CAPI3REF: Configure database connections
+** METHOD: sqlite3
+**
+** The sqlite3_db_config() interface is used to make configuration
+** changes to a [database connection].  The interface is similar to
+** [sqlite3_config()] except that the changes apply to a single
+** [database connection] (specified in the first argument).
+**
+** The second argument to sqlite3_db_config(D,V,...)  is the
+** [SQLITE_DBCONFIG_LOOKASIDE | configuration verb] - an integer code
+** that indicates what aspect of the [database connection] is being configured.
+** Subsequent arguments vary depending on the configuration verb.
+**
+** ^Calls to sqlite3_db_config() return SQLITE_OK if and only if
+** the call is considered successful.
+*/
+int sqlite3_db_config(sqlite3*, int op, ...);
+
+/*
+** CAPI3REF: Memory Allocation Routines
+**
+** An instance of this object defines the interface between SQLite
+** and low-level memory allocation routines.
+**
+** This object is used in only one place in the SQLite interface.
+** A pointer to an instance of this object is the argument to
+** [sqlite3_config()] when the configuration option is
+** [SQLITE_CONFIG_MALLOC] or [SQLITE_CONFIG_GETMALLOC].
+** By creating an instance of this object
+** and passing it to [sqlite3_config]([SQLITE_CONFIG_MALLOC])
+** during configuration, an application can specify an alternative
+** memory allocation subsystem for SQLite to use for all of its
+** dynamic memory needs.
+**
+** Note that SQLite comes with several [built-in memory allocators]
+** that are perfectly adequate for the overwhelming majority of applications
+** and that this object is only useful to a tiny minority of applications
+** with specialized memory allocation requirements.  This object is
+** also used during testing of SQLite in order to specify an alternative
+** memory allocator that simulates memory out-of-memory conditions in
+** order to verify that SQLite recovers gracefully from such
+** conditions.
+**
+** The xMalloc, xRealloc, and xFree methods must work like the
+** malloc(), realloc() and free() functions from the standard C library.
+** ^SQLite guarantees that the second argument to
+** xRealloc is always a value returned by a prior call to xRoundup.
+**
+** xSize should return the allocated size of a memory allocation
+** previously obtained from xMalloc or xRealloc.  The allocated size
+** is always at least as big as the requested size but may be larger.
+**
+** The xRoundup method returns what would be the allocated size of
+** a memory allocation given a particular requested size.  Most memory
+** allocators round up memory allocations at least to the next multiple
+** of 8.  Some allocators round up to a larger multiple or to a power of 2.
+** Every memory allocation request coming in through [sqlite3_malloc()]
+** or [sqlite3_realloc()] first calls xRoundup.  If xRoundup returns 0,
+** that causes the corresponding memory allocation to fail.
+**
+** The xInit method initializes the memory allocator.  For example,
+** it might allocate any require mutexes or initialize internal data
+** structures.  The xShutdown method is invoked (indirectly) by
+** [sqlite3_shutdown()] and should deallocate any resources acquired
+** by xInit.  The pAppData pointer is used as the only parameter to
+** xInit and xShutdown.
+**
+** SQLite holds the [SQLITE_MUTEX_STATIC_MASTER] mutex when it invokes
+** the xInit method, so the xInit method need not be threadsafe.  The
+** xShutdown method is only called from [sqlite3_shutdown()] so it does
+** not need to be threadsafe either.  For all other methods, SQLite
+** holds the [SQLITE_MUTEX_STATIC_MEM] mutex as long as the
+** [SQLITE_CONFIG_MEMSTATUS] configuration option is turned on (which
+** it is by default) and so the methods are automatically serialized.
+** However, if [SQLITE_CONFIG_MEMSTATUS] is disabled, then the other
+** methods must be threadsafe or else make their own arrangements for
+** serialization.
+**
+** SQLite will never invoke xInit() more than once without an intervening
+** call to xShutdown().
+*/
+struct sqlite3_mem_methods
+{
+    void* function(int) xMalloc; /* Memory allocation function */
+    void function(void*) xFree; /* Free a prior allocation */
+    void* function(void*, int) xRealloc; /* Resize an allocation */
+    int function(void*) xSize; /* Return the size of an allocation */
+    int function(int) xRoundup; /* Round up request size to allocation size */
+    int function(void*) xInit; /* Initialize the memory allocator */
+    void function(void*) xShutdown; /* Deinitialize the memory allocator */
+    void* pAppData; /* Argument to xInit() and xShutdown() */
+}
+
+/*
+** CAPI3REF: Configuration Options
+** KEYWORDS: {configuration option}
+**
+** These constants are the available integer configuration options that
+** can be passed as the first argument to the [sqlite3_config()] interface.
+**
+** New configuration options may be added in future releases of SQLite.
+** Existing configuration options might be discontinued.  Applications
+** should check the return code from [sqlite3_config()] to make sure that
+** the call worked.  The [sqlite3_config()] interface will return a
+** non-zero [error code] if a discontinued or unsupported configuration option
+** is invoked.
+**
+** <dl>
+** [[SQLITE_CONFIG_SINGLETHREAD]] <dt>SQLITE_CONFIG_SINGLETHREAD</dt>
+** <dd>There are no arguments to this option.  ^This option sets the
+** [threading mode] to Single-thread.  In other words, it disables
+** all mutexing and puts SQLite into a mode where it can only be used
+** by a single thread.   ^If SQLite is compiled with
+** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
+** it is not possible to change the [threading mode] from its default
+** value of Single-thread and so [sqlite3_config()] will return
+** [SQLITE_ERROR] if called with the SQLITE_CONFIG_SINGLETHREAD
+** configuration option.</dd>
+**
+** [[SQLITE_CONFIG_MULTITHREAD]] <dt>SQLITE_CONFIG_MULTITHREAD</dt>
+** <dd>There are no arguments to this option.  ^This option sets the
+** [threading mode] to Multi-thread.  In other words, it disables
+** mutexing on [database connection] and [prepared statement] objects.
+** The application is responsible for serializing access to
+** [database connections] and [prepared statements].  But other mutexes
+** are enabled so that SQLite will be safe to use in a multi-threaded
+** environment as long as no two threads attempt to use the same
+** [database connection] at the same time.  ^If SQLite is compiled with
+** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
+** it is not possible to set the Multi-thread [threading mode] and
+** [sqlite3_config()] will return [SQLITE_ERROR] if called with the
+** SQLITE_CONFIG_MULTITHREAD configuration option.</dd>
+**
+** [[SQLITE_CONFIG_SERIALIZED]] <dt>SQLITE_CONFIG_SERIALIZED</dt>
+** <dd>There are no arguments to this option.  ^This option sets the
+** [threading mode] to Serialized. In other words, this option enables
+** all mutexes including the recursive
+** mutexes on [database connection] and [prepared statement] objects.
+** In this mode (which is the default when SQLite is compiled with
+** [SQLITE_THREADSAFE=1]) the SQLite library will itself serialize access
+** to [database connections] and [prepared statements] so that the
+** application is free to use the same [database connection] or the
+** same [prepared statement] in different threads at the same time.
+** ^If SQLite is compiled with
+** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
+** it is not possible to set the Serialized [threading mode] and
+** [sqlite3_config()] will return [SQLITE_ERROR] if called with the
+** SQLITE_CONFIG_SERIALIZED configuration option.</dd>
+**
+** [[SQLITE_CONFIG_MALLOC]] <dt>SQLITE_CONFIG_MALLOC</dt>
+** <dd> ^(The SQLITE_CONFIG_MALLOC option takes a single argument which is
+** a pointer to an instance of the [sqlite3_mem_methods] structure.
+** The argument specifies
+** alternative low-level memory allocation routines to be used in place of
+** the memory allocation routines built into SQLite.)^ ^SQLite makes
+** its own private copy of the content of the [sqlite3_mem_methods] structure
+** before the [sqlite3_config()] call returns.</dd>
+**
+** [[SQLITE_CONFIG_GETMALLOC]] <dt>SQLITE_CONFIG_GETMALLOC</dt>
+** <dd> ^(The SQLITE_CONFIG_GETMALLOC option takes a single argument which
+** is a pointer to an instance of the [sqlite3_mem_methods] structure.
+** The [sqlite3_mem_methods]
+** structure is filled with the currently defined memory allocation routines.)^
+** This option can be used to overload the default memory allocation
+** routines with a wrapper that simulations memory allocation failure or
+** tracks memory usage, for example. </dd>
+**
+** [[SQLITE_CONFIG_SMALL_MALLOC]] <dt>SQLITE_CONFIG_SMALL_MALLOC</dt>
+** <dd> ^The SQLITE_CONFIG_SMALL_MALLOC option takes single argument of
+** type int, interpreted as a boolean, which if true provides a hint to
+** SQLite that it should avoid large memory allocations if possible.
+** SQLite will run faster if it is free to make large memory allocations,
+** but some application might prefer to run slower in exchange for
+** guarantees about memory fragmentation that are possible if large
+** allocations are avoided.  This hint is normally off.
+** </dd>
+**
+** [[SQLITE_CONFIG_MEMSTATUS]] <dt>SQLITE_CONFIG_MEMSTATUS</dt>
+** <dd> ^The SQLITE_CONFIG_MEMSTATUS option takes single argument of type int,
+** interpreted as a boolean, which enables or disables the collection of
+** memory allocation statistics. ^(When memory allocation statistics are
+** disabled, the following SQLite interfaces become non-operational:
+**   <ul>
+**   <li> [sqlite3_memory_used()]
+**   <li> [sqlite3_memory_highwater()]
+**   <li> [sqlite3_soft_heap_limit64()]
+**   <li> [sqlite3_status64()]
+**   </ul>)^
+** ^Memory allocation statistics are enabled by default unless SQLite is
+** compiled with [SQLITE_DEFAULT_MEMSTATUS]=0 in which case memory
+** allocation statistics are disabled by default.
+** </dd>
+**
+** [[SQLITE_CONFIG_SCRATCH]] <dt>SQLITE_CONFIG_SCRATCH</dt>
+** <dd> The SQLITE_CONFIG_SCRATCH option is no longer used.
+** </dd>
+**
+** [[SQLITE_CONFIG_PAGECACHE]] <dt>SQLITE_CONFIG_PAGECACHE</dt>
+** <dd> ^The SQLITE_CONFIG_PAGECACHE option specifies a memory pool
+** that SQLite can use for the database page cache with the default page
+** cache implementation.
+** This configuration option is a no-op if an application-define page
+** cache implementation is loaded using the [SQLITE_CONFIG_PCACHE2].
+** ^There are three arguments to SQLITE_CONFIG_PAGECACHE: A pointer to
+** 8-byte aligned memory (pMem), the size of each page cache line (sz),
+** and the number of cache lines (N).
+** The sz argument should be the size of the largest database page
+** (a power of two between 512 and 65536) plus some extra bytes for each
+** page header.  ^The number of extra bytes needed by the page header
+** can be determined using [SQLITE_CONFIG_PCACHE_HDRSZ].
+** ^It is harmless, apart from the wasted memory,
+** for the sz parameter to be larger than necessary.  The pMem
+** argument must be either a NULL pointer or a pointer to an 8-byte
+** aligned block of memory of at least sz*N bytes, otherwise
+** subsequent behavior is undefined.
+** ^When pMem is not NULL, SQLite will strive to use the memory provided
+** to satisfy page cache needs, falling back to [sqlite3_malloc()] if
+** a page cache line is larger than sz bytes or if all of the pMem buffer
+** is exhausted.
+** ^If pMem is NULL and N is non-zero, then each database connection
+** does an initial bulk allocation for page cache memory
+** from [sqlite3_malloc()] sufficient for N cache lines if N is positive or
+** of -1024*N bytes if N is negative, . ^If additional
+** page cache memory is needed beyond what is provided by the initial
+** allocation, then SQLite goes to [sqlite3_malloc()] separately for each
+** additional cache line. </dd>
+**
+** [[SQLITE_CONFIG_HEAP]] <dt>SQLITE_CONFIG_HEAP</dt>
+** <dd> ^The SQLITE_CONFIG_HEAP option specifies a static memory buffer
+** that SQLite will use for all of its dynamic memory allocation needs
+** beyond those provided for by [SQLITE_CONFIG_PAGECACHE].
+** ^The SQLITE_CONFIG_HEAP option is only available if SQLite is compiled
+** with either [SQLITE_ENABLE_MEMSYS3] or [SQLITE_ENABLE_MEMSYS5] and returns
+** [SQLITE_ERROR] if invoked otherwise.
+** ^There are three arguments to SQLITE_CONFIG_HEAP:
+** An 8-byte aligned pointer to the memory,
+** the number of bytes in the memory buffer, and the minimum allocation size.
+** ^If the first pointer (the memory pointer) is NULL, then SQLite reverts
+** to using its default memory allocator (the system malloc() implementation),
+** undoing any prior invocation of [SQLITE_CONFIG_MALLOC].  ^If the
+** memory pointer is not NULL then the alternative memory
+** allocator is engaged to handle all of SQLites memory allocation needs.
+** The first pointer (the memory pointer) must be aligned to an 8-byte
+** boundary or subsequent behavior of SQLite will be undefined.
+** The minimum allocation size is capped at 2**12. Reasonable values
+** for the minimum allocation size are 2**5 through 2**8.</dd>
+**
+** [[SQLITE_CONFIG_MUTEX]] <dt>SQLITE_CONFIG_MUTEX</dt>
+** <dd> ^(The SQLITE_CONFIG_MUTEX option takes a single argument which is a
+** pointer to an instance of the [sqlite3_mutex_methods] structure.
+** The argument specifies alternative low-level mutex routines to be used
+** in place the mutex routines built into SQLite.)^  ^SQLite makes a copy of
+** the content of the [sqlite3_mutex_methods] structure before the call to
+** [sqlite3_config()] returns. ^If SQLite is compiled with
+** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
+** the entire mutexing subsystem is omitted from the build and hence calls to
+** [sqlite3_config()] with the SQLITE_CONFIG_MUTEX configuration option will
+** return [SQLITE_ERROR].</dd>
+**
+** [[SQLITE_CONFIG_GETMUTEX]] <dt>SQLITE_CONFIG_GETMUTEX</dt>
+** <dd> ^(The SQLITE_CONFIG_GETMUTEX option takes a single argument which
+** is a pointer to an instance of the [sqlite3_mutex_methods] structure.  The
+** [sqlite3_mutex_methods]
+** structure is filled with the currently defined mutex routines.)^
+** This option can be used to overload the default mutex allocation
+** routines with a wrapper used to track mutex usage for performance
+** profiling or testing, for example.   ^If SQLite is compiled with
+** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
+** the entire mutexing subsystem is omitted from the build and hence calls to
+** [sqlite3_config()] with the SQLITE_CONFIG_GETMUTEX configuration option will
+** return [SQLITE_ERROR].</dd>
+**
+** [[SQLITE_CONFIG_LOOKASIDE]] <dt>SQLITE_CONFIG_LOOKASIDE</dt>
+** <dd> ^(The SQLITE_CONFIG_LOOKASIDE option takes two arguments that determine
+** the default size of lookaside memory on each [database connection].
+** The first argument is the
+** size of each lookaside buffer slot and the second is the number of
+** slots allocated to each database connection.)^  ^(SQLITE_CONFIG_LOOKASIDE
+** sets the <i>default</i> lookaside size. The [SQLITE_DBCONFIG_LOOKASIDE]
+** option to [sqlite3_db_config()] can be used to change the lookaside
+** configuration on individual connections.)^ </dd>
+**
+** [[SQLITE_CONFIG_PCACHE2]] <dt>SQLITE_CONFIG_PCACHE2</dt>
+** <dd> ^(The SQLITE_CONFIG_PCACHE2 option takes a single argument which is
+** a pointer to an [sqlite3_pcache_methods2] object.  This object specifies
+** the interface to a custom page cache implementation.)^
+** ^SQLite makes a copy of the [sqlite3_pcache_methods2] object.</dd>
+**
+** [[SQLITE_CONFIG_GETPCACHE2]] <dt>SQLITE_CONFIG_GETPCACHE2</dt>
+** <dd> ^(The SQLITE_CONFIG_GETPCACHE2 option takes a single argument which
+** is a pointer to an [sqlite3_pcache_methods2] object.  SQLite copies of
+** the current page cache implementation into that object.)^ </dd>
+**
+** [[SQLITE_CONFIG_LOG]] <dt>SQLITE_CONFIG_LOG</dt>
+** <dd> The SQLITE_CONFIG_LOG option is used to configure the SQLite
+** global [error log].
+** (^The SQLITE_CONFIG_LOG option takes two arguments: a pointer to a
+** function with a call signature of void(*)(void*,int,const char*),
+** and a pointer to void. ^If the function pointer is not NULL, it is
+** invoked by [sqlite3_log()] to process each logging event.  ^If the
+** function pointer is NULL, the [sqlite3_log()] interface becomes a no-op.
+** ^The void pointer that is the second argument to SQLITE_CONFIG_LOG is
+** passed through as the first parameter to the application-defined logger
+** function whenever that function is invoked.  ^The second parameter to
+** the logger function is a copy of the first parameter to the corresponding
+** [sqlite3_log()] call and is intended to be a [result code] or an
+** [extended result code].  ^The third parameter passed to the logger is
+** log message after formatting via [sqlite3_snprintf()].
+** The SQLite logging interface is not reentrant; the logger function
+** supplied by the application must not invoke any SQLite interface.
+** In a multi-threaded application, the application-defined logger
+** function must be threadsafe. </dd>
+**
+** [[SQLITE_CONFIG_URI]] <dt>SQLITE_CONFIG_URI
+** <dd>^(The SQLITE_CONFIG_URI option takes a single argument of type int.
+** If non-zero, then URI handling is globally enabled. If the parameter is zero,
+** then URI handling is globally disabled.)^ ^If URI handling is globally
+** enabled, all filenames passed to [sqlite3_open()], [sqlite3_open_v2()],
+** [sqlite3_open16()] or
+** specified as part of [ATTACH] commands are interpreted as URIs, regardless
+** of whether or not the [SQLITE_OPEN_URI] flag is set when the database
+** connection is opened. ^If it is globally disabled, filenames are
+** only interpreted as URIs if the SQLITE_OPEN_URI flag is set when the
+** database connection is opened. ^(By default, URI handling is globally
+** disabled. The default value may be changed by compiling with the
+** [SQLITE_USE_URI] symbol defined.)^
+**
+** [[SQLITE_CONFIG_COVERING_INDEX_SCAN]] <dt>SQLITE_CONFIG_COVERING_INDEX_SCAN
+** <dd>^The SQLITE_CONFIG_COVERING_INDEX_SCAN option takes a single integer
+** argument which is interpreted as a boolean in order to enable or disable
+** the use of covering indices for full table scans in the query optimizer.
+** ^The default setting is determined
+** by the [SQLITE_ALLOW_COVERING_INDEX_SCAN] compile-time option, or is "on"
+** if that compile-time option is omitted.
+** The ability to disable the use of covering indices for full table scans
+** is because some incorrectly coded legacy applications might malfunction
+** when the optimization is enabled.  Providing the ability to
+** disable the optimization allows the older, buggy application code to work
+** without change even with newer versions of SQLite.
+**
+** [[SQLITE_CONFIG_PCACHE]] [[SQLITE_CONFIG_GETPCACHE]]
+** <dt>SQLITE_CONFIG_PCACHE and SQLITE_CONFIG_GETPCACHE
+** <dd> These options are obsolete and should not be used by new code.
+** They are retained for backwards compatibility but are now no-ops.
+** </dd>
+**
+** [[SQLITE_CONFIG_SQLLOG]]
+** <dt>SQLITE_CONFIG_SQLLOG
+** <dd>This option is only available if sqlite is compiled with the
+** [SQLITE_ENABLE_SQLLOG] pre-processor macro defined. The first argument should
+** be a pointer to a function of type void(*)(void*,sqlite3*,const char*, int).
+** The second should be of type (void*). The callback is invoked by the library
+** in three separate circumstances, identified by the value passed as the
+** fourth parameter. If the fourth parameter is 0, then the database connection
+** passed as the second argument has just been opened. The third argument
+** points to a buffer containing the name of the main database file. If the
+** fourth parameter is 1, then the SQL statement that the third parameter
+** points to has just been executed. Or, if the fourth parameter is 2, then
+** the connection being passed as the second parameter is being closed. The
+** third parameter is passed NULL In this case.  An example of using this
+** configuration option can be seen in the "test_sqllog.c" source file in
+** the canonical SQLite source tree.</dd>
+**
+** [[SQLITE_CONFIG_MMAP_SIZE]]
+** <dt>SQLITE_CONFIG_MMAP_SIZE
+** <dd>^SQLITE_CONFIG_MMAP_SIZE takes two 64-bit integer (sqlite3_int64) values
+** that are the default mmap size limit (the default setting for
+** [PRAGMA mmap_size]) and the maximum allowed mmap size limit.
+** ^The default setting can be overridden by each database connection using
+** either the [PRAGMA mmap_size] command, or by using the
+** [SQLITE_FCNTL_MMAP_SIZE] file control.  ^(The maximum allowed mmap size
+** will be silently truncated if necessary so that it does not exceed the
+** compile-time maximum mmap size set by the
+** [SQLITE_MAX_MMAP_SIZE] compile-time option.)^
+** ^If either argument to this option is negative, then that argument is
+** changed to its compile-time default.
+**
+** [[SQLITE_CONFIG_WIN32_HEAPSIZE]]
+** <dt>SQLITE_CONFIG_WIN32_HEAPSIZE
+** <dd>^The SQLITE_CONFIG_WIN32_HEAPSIZE option is only available if SQLite is
+** compiled for Windows with the [SQLITE_WIN32_MALLOC] pre-processor macro
+** defined. ^SQLITE_CONFIG_WIN32_HEAPSIZE takes a 32-bit unsigned integer value
+** that specifies the maximum size of the created heap.
+**
+** [[SQLITE_CONFIG_PCACHE_HDRSZ]]
+** <dt>SQLITE_CONFIG_PCACHE_HDRSZ
+** <dd>^The SQLITE_CONFIG_PCACHE_HDRSZ option takes a single parameter which
+** is a pointer to an integer and writes into that integer the number of extra
+** bytes per page required for each page in [SQLITE_CONFIG_PAGECACHE].
+** The amount of extra space required can change depending on the compiler,
+** target platform, and SQLite version.
+**
+** [[SQLITE_CONFIG_PMASZ]]
+** <dt>SQLITE_CONFIG_PMASZ
+** <dd>^The SQLITE_CONFIG_PMASZ option takes a single parameter which
+** is an unsigned integer and sets the "Minimum PMA Size" for the multithreaded
+** sorter to that integer.  The default minimum PMA Size is set by the
+** [SQLITE_SORTER_PMASZ] compile-time option.  New threads are launched
+** to help with sort operations when multithreaded sorting
+** is enabled (using the [PRAGMA threads] command) and the amount of content
+** to be sorted exceeds the page size times the minimum of the
+** [PRAGMA cache_size] setting and this value.
+**
+** [[SQLITE_CONFIG_STMTJRNL_SPILL]]
+** <dt>SQLITE_CONFIG_STMTJRNL_SPILL
+** <dd>^The SQLITE_CONFIG_STMTJRNL_SPILL option takes a single parameter which
+** becomes the [statement journal] spill-to-disk threshold.
+** [Statement journals] are held in memory until their size (in bytes)
+** exceeds this threshold, at which point they are written to disk.
+** Or if the threshold is -1, statement journals are always held
+** exclusively in memory.
+** Since many statement journals never become large, setting the spill
+** threshold to a value such as 64KiB can greatly reduce the amount of
+** I/O required to support statement rollback.
+** The default value for this setting is controlled by the
+** [SQLITE_STMTJRNL_SPILL] compile-time option.
+**
+** [[SQLITE_CONFIG_SORTERREF_SIZE]]
+** <dt>SQLITE_CONFIG_SORTERREF_SIZE
+** <dd>The SQLITE_CONFIG_SORTERREF_SIZE option accepts a single parameter
+** of type (int) - the new value of the sorter-reference size threshold.
+** Usually, when SQLite uses an external sort to order records according
+** to an ORDER BY clause, all fields required by the caller are present in the
+** sorted records. However, if SQLite determines based on the declared type
+** of a table column that its values are likely to be very large - larger
+** than the configured sorter-reference size threshold - then a reference
+** is stored in each sorted record and the required column values loaded
+** from the database as records are returned in sorted order. The default
+** value for this option is to never use this optimization. Specifying a
+** negative value for this option restores the default behaviour.
+** This option is only available if SQLite is compiled with the
+** [SQLITE_ENABLE_SORTER_REFERENCES] compile-time option.
+** </dl>
+*/
+enum SQLITE_CONFIG_SINGLETHREAD = 1; /* nil */
+enum SQLITE_CONFIG_MULTITHREAD = 2; /* nil */
+enum SQLITE_CONFIG_SERIALIZED = 3; /* nil */
+enum SQLITE_CONFIG_MALLOC = 4; /* sqlite3_mem_methods* */
+enum SQLITE_CONFIG_GETMALLOC = 5; /* sqlite3_mem_methods* */
+enum SQLITE_CONFIG_SCRATCH = 6; /* No longer used */
+enum SQLITE_CONFIG_PAGECACHE = 7; /* void*, int sz, int N */
+enum SQLITE_CONFIG_HEAP = 8; /* void*, int nByte, int min */
+enum SQLITE_CONFIG_MEMSTATUS = 9; /* boolean */
+enum SQLITE_CONFIG_MUTEX = 10; /* sqlite3_mutex_methods* */
+enum SQLITE_CONFIG_GETMUTEX = 11; /* sqlite3_mutex_methods* */
+/* previously SQLITE_CONFIG_CHUNKALLOC 12 which is now unused. */
+enum SQLITE_CONFIG_LOOKASIDE = 13; /* int int */
+enum SQLITE_CONFIG_PCACHE = 14; /* no-op */
+enum SQLITE_CONFIG_GETPCACHE = 15; /* no-op */
+enum SQLITE_CONFIG_LOG = 16; /* xFunc, void* */
+enum SQLITE_CONFIG_URI = 17; /* int */
+enum SQLITE_CONFIG_PCACHE2 = 18; /* sqlite3_pcache_methods2* */
+enum SQLITE_CONFIG_GETPCACHE2 = 19; /* sqlite3_pcache_methods2* */
+enum SQLITE_CONFIG_COVERING_INDEX_SCAN = 20; /* int */
+enum SQLITE_CONFIG_SQLLOG = 21; /* xSqllog, void* */
+enum SQLITE_CONFIG_MMAP_SIZE = 22; /* sqlite3_int64, sqlite3_int64 */
+enum SQLITE_CONFIG_WIN32_HEAPSIZE = 23; /* int nByte */
+enum SQLITE_CONFIG_PCACHE_HDRSZ = 24; /* int *psz */
+enum SQLITE_CONFIG_PMASZ = 25; /* unsigned int szPma */
+enum SQLITE_CONFIG_STMTJRNL_SPILL = 26; /* int nByte */
+enum SQLITE_CONFIG_SMALL_MALLOC = 27; /* boolean */
+enum SQLITE_CONFIG_SORTERREF_SIZE = 28; /* int nByte */
+
+/*
+** CAPI3REF: Database Connection Configuration Options
+**
+** These constants are the available integer configuration options that
+** can be passed as the second argument to the [sqlite3_db_config()] interface.
+**
+** New configuration options may be added in future releases of SQLite.
+** Existing configuration options might be discontinued.  Applications
+** should check the return code from [sqlite3_db_config()] to make sure that
+** the call worked.  ^The [sqlite3_db_config()] interface will return a
+** non-zero [error code] if a discontinued or unsupported configuration option
+** is invoked.
+**
+** <dl>
+** <dt>SQLITE_DBCONFIG_LOOKASIDE</dt>
+** <dd> ^This option takes three additional arguments that determine the
+** [lookaside memory allocator] configuration for the [database connection].
+** ^The first argument (the third parameter to [sqlite3_db_config()] is a
+** pointer to a memory buffer to use for lookaside memory.
+** ^The first argument after the SQLITE_DBCONFIG_LOOKASIDE verb
+** may be NULL in which case SQLite will allocate the
+** lookaside buffer itself using [sqlite3_malloc()]. ^The second argument is the
+** size of each lookaside buffer slot.  ^The third argument is the number of
+** slots.  The size of the buffer in the first argument must be greater than
+** or equal to the product of the second and third arguments.  The buffer
+** must be aligned to an 8-byte boundary.  ^If the second argument to
+** SQLITE_DBCONFIG_LOOKASIDE is not a multiple of 8, it is internally
+** rounded down to the next smaller multiple of 8.  ^(The lookaside memory
+** configuration for a database connection can only be changed when that
+** connection is not currently using lookaside memory, or in other words
+** when the "current value" returned by
+** [sqlite3_db_status](D,[SQLITE_CONFIG_LOOKASIDE],...) is zero.
+** Any attempt to change the lookaside memory configuration when lookaside
+** memory is in use leaves the configuration unchanged and returns
+** [SQLITE_BUSY].)^</dd>
+**
+** <dt>SQLITE_DBCONFIG_ENABLE_FKEY</dt>
+** <dd> ^This option is used to enable or disable the enforcement of
+** [foreign key constraints].  There should be two additional arguments.
+** The first argument is an integer which is 0 to disable FK enforcement,
+** positive to enable FK enforcement or negative to leave FK enforcement
+** unchanged.  The second parameter is a pointer to an integer into which
+** is written 0 or 1 to indicate whether FK enforcement is off or on
+** following this call.  The second parameter may be a NULL pointer, in
+** which case the FK enforcement setting is not reported back. </dd>
+**
+** <dt>SQLITE_DBCONFIG_ENABLE_TRIGGER</dt>
+** <dd> ^This option is used to enable or disable [CREATE TRIGGER | triggers].
+** There should be two additional arguments.
+** The first argument is an integer which is 0 to disable triggers,
+** positive to enable triggers or negative to leave the setting unchanged.
+** The second parameter is a pointer to an integer into which
+** is written 0 or 1 to indicate whether triggers are disabled or enabled
+** following this call.  The second parameter may be a NULL pointer, in
+** which case the trigger setting is not reported back. </dd>
+**
+** <dt>SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</dt>
+** <dd> ^This option is used to enable or disable the two-argument
+** version of the [fts3_tokenizer()] function which is part of the
+** [FTS3] full-text search engine extension.
+** There should be two additional arguments.
+** The first argument is an integer which is 0 to disable fts3_tokenizer() or
+** positive to enable fts3_tokenizer() or negative to leave the setting
+** unchanged.
+** The second parameter is a pointer to an integer into which
+** is written 0 or 1 to indicate whether fts3_tokenizer is disabled or enabled
+** following this call.  The second parameter may be a NULL pointer, in
+** which case the new setting is not reported back. </dd>
+**
+** <dt>SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION</dt>
+** <dd> ^This option is used to enable or disable the [sqlite3_load_extension()]
+** interface independently of the [load_extension()] SQL function.
+** The [sqlite3_enable_load_extension()] API enables or disables both the
+** C-API [sqlite3_load_extension()] and the SQL function [load_extension()].
+** There should be two additional arguments.
+** When the first argument to this interface is 1, then only the C-API is
+** enabled and the SQL function remains disabled.  If the first argument to
+** this interface is 0, then both the C-API and the SQL function are disabled.
+** If the first argument is -1, then no changes are made to state of either the
+** C-API or the SQL function.
+** The second parameter is a pointer to an integer into which
+** is written 0 or 1 to indicate whether [sqlite3_load_extension()] interface
+** is disabled or enabled following this call.  The second parameter may
+** be a NULL pointer, in which case the new setting is not reported back.
+** </dd>
+**
+** <dt>SQLITE_DBCONFIG_MAINDBNAME</dt>
+** <dd> ^This option is used to change the name of the "main" database
+** schema.  ^The sole argument is a pointer to a constant UTF8 string
+** which will become the new schema name in place of "main".  ^SQLite
+** does not make a copy of the new main schema name string, so the application
+** must ensure that the argument passed into this DBCONFIG option is unchanged
+** until after the database connection closes.
+** </dd>
+**
+** <dt>SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE</dt>
+** <dd> Usually, when a database in wal mode is closed or detached from a
+** database handle, SQLite checks if this will mean that there are now no
+** connections at all to the database. If so, it performs a checkpoint
+** operation before closing the connection. This option may be used to
+** override this behaviour. The first parameter passed to this operation
+** is an integer - positive to disable checkpoints-on-close, or zero (the
+** default) to enable them, and negative to leave the setting unchanged.
+** The second parameter is a pointer to an integer
+** into which is written 0 or 1 to indicate whether checkpoints-on-close
+** have been disabled - 0 if they are not disabled, 1 if they are.
+** </dd>
+**
+** <dt>SQLITE_DBCONFIG_ENABLE_QPSG</dt>
+** <dd>^(The SQLITE_DBCONFIG_ENABLE_QPSG option activates or deactivates
+** the [query planner stability guarantee] (QPSG).  When the QPSG is active,
+** a single SQL query statement will always use the same algorithm regardless
+** of values of [bound parameters].)^ The QPSG disables some query optimizations
+** that look at the values of bound parameters, which can make some queries
+** slower.  But the QPSG has the advantage of more predictable behavior.  With
+** the QPSG active, SQLite will always use the same query plan in the field as
+** was used during testing in the lab.
+** The first argument to this setting is an integer which is 0 to disable
+** the QPSG, positive to enable QPSG, or negative to leave the setting
+** unchanged. The second parameter is a pointer to an integer into which
+** is written 0 or 1 to indicate whether the QPSG is disabled or enabled
+** following this call.
+** </dd>
+**
+** <dt>SQLITE_DBCONFIG_TRIGGER_EQP</dt>
+** <dd> By default, the output of EXPLAIN QUERY PLAN commands does not
+** include output for any operations performed by trigger programs. This
+** option is used to set or clear (the default) a flag that governs this
+** behavior. The first parameter passed to this operation is an integer -
+** positive to enable output for trigger programs, or zero to disable it,
+** or negative to leave the setting unchanged.
+** The second parameter is a pointer to an integer into which is written
+** 0 or 1 to indicate whether output-for-triggers has been disabled - 0 if
+** it is not disabled, 1 if it is.
+** </dd>
+**
+** <dt>SQLITE_DBCONFIG_RESET_DATABASE</dt>
+** <dd> Set the SQLITE_DBCONFIG_RESET_DATABASE flag and then run
+** [VACUUM] in order to reset a database back to an empty database
+** with no schema and no content. The following process works even for
+** a badly corrupted database file:
+** <ol>
+** <li> If the database connection is newly opened, make sure it has read the
+**      database schema by preparing then discarding some query against the
+**      database, or calling sqlite3_table_column_metadata(), ignoring any
+**      errors.  This step is only necessary if the application desires to keep
+**      the database in WAL mode after the reset if it was in WAL mode before
+**      the reset.
+** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 1, 0);
+** <li> [sqlite3_exec](db, "[VACUUM]", 0, 0, 0);
+** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 0, 0);
+** </ol>
+** Because resetting a database is destructive and irreversible, the
+** process requires the use of this obscure API and multiple steps to help
+** ensure that it does not happen by accident.
+** </dd>
+** </dl>
+*/
+enum SQLITE_DBCONFIG_MAINDBNAME = 1000; /* const char* */
+enum SQLITE_DBCONFIG_LOOKASIDE = 1001; /* void* int int */
+enum SQLITE_DBCONFIG_ENABLE_FKEY = 1002; /* int int* */
+enum SQLITE_DBCONFIG_ENABLE_TRIGGER = 1003; /* int int* */
+enum SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER = 1004; /* int int* */
+enum SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION = 1005; /* int int* */
+enum SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE = 1006; /* int int* */
+enum SQLITE_DBCONFIG_ENABLE_QPSG = 1007; /* int int* */
+enum SQLITE_DBCONFIG_TRIGGER_EQP = 1008; /* int int* */
+enum SQLITE_DBCONFIG_RESET_DATABASE = 1009; /* int int* */
+enum SQLITE_DBCONFIG_MAX = 1009; /* Largest DBCONFIG */
+
+/*
+** CAPI3REF: Enable Or Disable Extended Result Codes
+** METHOD: sqlite3
+**
+** ^The sqlite3_extended_result_codes() routine enables or disables the
+** [extended result codes] feature of SQLite. ^The extended result
+** codes are disabled by default for historical compatibility.
+*/
+int sqlite3_extended_result_codes(sqlite3*, int onoff);
+
+/*
+** CAPI3REF: Last Insert Rowid
+** METHOD: sqlite3
+**
+** ^Each entry in most SQLite tables (except for [WITHOUT ROWID] tables)
+** has a unique 64-bit signed
+** integer key called the [ROWID | "rowid"]. ^The rowid is always available
+** as an undeclared column named ROWID, OID, or _ROWID_ as long as those
+** names are not also used by explicitly declared columns. ^If
+** the table has a column of type [INTEGER PRIMARY KEY] then that column
+** is another alias for the rowid.
+**
+** ^The sqlite3_last_insert_rowid(D) interface usually returns the [rowid] of
+** the most recent successful [INSERT] into a rowid table or [virtual table]
+** on database connection D. ^Inserts into [WITHOUT ROWID] tables are not
+** recorded. ^If no successful [INSERT]s into rowid tables have ever occurred
+** on the database connection D, then sqlite3_last_insert_rowid(D) returns
+** zero.
+**
+** As well as being set automatically as rows are inserted into database
+** tables, the value returned by this function may be set explicitly by
+** [sqlite3_set_last_insert_rowid()]
+**
+** Some virtual table implementations may INSERT rows into rowid tables as
+** part of committing a transaction (e.g. to flush data accumulated in memory
+** to disk). In this case subsequent calls to this function return the rowid
+** associated with these internal INSERT operations, which leads to
+** unintuitive results. Virtual table implementations that do write to rowid
+** tables in this way can avoid this problem by restoring the original
+** rowid value using [sqlite3_set_last_insert_rowid()] before returning
+** control to the user.
+**
+** ^(If an [INSERT] occurs within a trigger then this routine will
+** return the [rowid] of the inserted row as long as the trigger is
+** running. Once the trigger program ends, the value returned
+** by this routine reverts to what it was before the trigger was fired.)^
+**
+** ^An [INSERT] that fails due to a constraint violation is not a
+** successful [INSERT] and does not change the value returned by this
+** routine.  ^Thus INSERT OR FAIL, INSERT OR IGNORE, INSERT OR ROLLBACK,
+** and INSERT OR ABORT make no changes to the return value of this
+** routine when their insertion fails.  ^(When INSERT OR REPLACE
+** encounters a constraint violation, it does not fail.  The
+** INSERT continues to completion after deleting rows that caused
+** the constraint problem so INSERT OR REPLACE will always change
+** the return value of this interface.)^
+**
+** ^For the purposes of this routine, an [INSERT] is considered to
+** be successful even if it is subsequently rolled back.
+**
+** This function is accessible to SQL statements via the
+** [last_insert_rowid() SQL function].
+**
+** If a separate thread performs a new [INSERT] on the same
+** database connection while the [sqlite3_last_insert_rowid()]
+** function is running and thus changes the last insert [rowid],
+** then the value returned by [sqlite3_last_insert_rowid()] is
+** unpredictable and might not equal either the old or the new
+** last insert [rowid].
+*/
+sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);
+
+/*
+** CAPI3REF: Set the Last Insert Rowid value.
+** METHOD: sqlite3
+**
+** The sqlite3_set_last_insert_rowid(D, R) method allows the application to
+** set the value returned by calling sqlite3_last_insert_rowid(D) to R
+** without inserting a row into the database.
+*/
+void sqlite3_set_last_insert_rowid(sqlite3*, sqlite3_int64);
+
+/*
+** CAPI3REF: Count The Number Of Rows Modified
+** METHOD: sqlite3
+**
+** ^This function returns the number of rows modified, inserted or
+** deleted by the most recently completed INSERT, UPDATE or DELETE
+** statement on the database connection specified by the only parameter.
+** ^Executing any other type of SQL statement does not modify the value
+** returned by this function.
+**
+** ^Only changes made directly by the INSERT, UPDATE or DELETE statement are
+** considered - auxiliary changes caused by [CREATE TRIGGER | triggers],
+** [foreign key actions] or [REPLACE] constraint resolution are not counted.
+**
+** Changes to a view that are intercepted by
+** [INSTEAD OF trigger | INSTEAD OF triggers] are not counted. ^The value
+** returned by sqlite3_changes() immediately after an INSERT, UPDATE or
+** DELETE statement run on a view is always zero. Only changes made to real
+** tables are counted.
+**
+** Things are more complicated if the sqlite3_changes() function is
+** executed while a trigger program is running. This may happen if the
+** program uses the [changes() SQL function], or if some other callback
+** function invokes sqlite3_changes() directly. Essentially:
+**
+** <ul>
+**   <li> ^(Before entering a trigger program the value returned by
+**        sqlite3_changes() function is saved. After the trigger program
+**        has finished, the original value is restored.)^
+**
+**   <li> ^(Within a trigger program each INSERT, UPDATE and DELETE
+**        statement sets the value returned by sqlite3_changes()
+**        upon completion as normal. Of course, this value will not include
+**        any changes performed by sub-triggers, as the sqlite3_changes()
+**        value will be saved and restored after each sub-trigger has run.)^
+** </ul>
+**
+** ^This means that if the changes() SQL function (or similar) is used
+** by the first INSERT, UPDATE or DELETE statement within a trigger, it
+** returns the value as set when the calling statement began executing.
+** ^If it is used by the second or subsequent such statement within a trigger
+** program, the value returned reflects the number of rows modified by the
+** previous INSERT, UPDATE or DELETE statement within the same trigger.
+**
+** If a separate thread makes changes on the same database connection
+** while [sqlite3_changes()] is running then the value returned
+** is unpredictable and not meaningful.
+**
+** See also:
+** <ul>
+** <li> the [sqlite3_total_changes()] interface
+** <li> the [count_changes pragma]
+** <li> the [changes() SQL function]
+** <li> the [data_version pragma]
+** </ul>
+*/
+int sqlite3_changes(sqlite3*);
+
+/*
+** CAPI3REF: Total Number Of Rows Modified
+** METHOD: sqlite3
+**
+** ^This function returns the total number of rows inserted, modified or
+** deleted by all [INSERT], [UPDATE] or [DELETE] statements completed
+** since the database connection was opened, including those executed as
+** part of trigger programs. ^Executing any other type of SQL statement
+** does not affect the value returned by sqlite3_total_changes().
+**
+** ^Changes made as part of [foreign key actions] are included in the
+** count, but those made as part of REPLACE constraint resolution are
+** not. ^Changes to a view that are intercepted by INSTEAD OF triggers
+** are not counted.
+**
+** This the [sqlite3_total_changes(D)] interface only reports the number
+** of rows that changed due to SQL statement run against database
+** connection D.  Any changes by other database connections are ignored.
+** To detect changes against a database file from other database
+** connections use the [PRAGMA data_version] command or the
+** [SQLITE_FCNTL_DATA_VERSION] [file control].
+**
+** If a separate thread makes changes on the same database connection
+** while [sqlite3_total_changes()] is running then the value
+** returned is unpredictable and not meaningful.
+**
+** See also:
+** <ul>
+** <li> the [sqlite3_changes()] interface
+** <li> the [count_changes pragma]
+** <li> the [changes() SQL function]
+** <li> the [data_version pragma]
+** <li> the [SQLITE_FCNTL_DATA_VERSION] [file control]
+** </ul>
+*/
+int sqlite3_total_changes(sqlite3*);
+
+/*
+** CAPI3REF: Interrupt A Long-Running Query
+** METHOD: sqlite3
+**
+** ^This function causes any pending database operation to abort and
+** return at its earliest opportunity. This routine is typically
+** called in response to a user action such as pressing "Cancel"
+** or Ctrl-C where the user wants a long query operation to halt
+** immediately.
+**
+** ^It is safe to call this routine from a thread different from the
+** thread that is currently running the database operation.  But it
+** is not safe to call this routine with a [database connection] that
+** is closed or might close before sqlite3_interrupt() returns.
+**
+** ^If an SQL operation is very nearly finished at the time when
+** sqlite3_interrupt() is called, then it might not have an opportunity
+** to be interrupted and might continue to completion.
+**
+** ^An SQL operation that is interrupted will return [SQLITE_INTERRUPT].
+** ^If the interrupted SQL operation is an INSERT, UPDATE, or DELETE
+** that is inside an explicit transaction, then the entire transaction
+** will be rolled back automatically.
+**
+** ^The sqlite3_interrupt(D) call is in effect until all currently running
+** SQL statements on [database connection] D complete.  ^Any new SQL statements
+** that are started after the sqlite3_interrupt() call and before the
+** running statements reaches zero are interrupted as if they had been
+** running prior to the sqlite3_interrupt() call.  ^New SQL statements
+** that are started after the running statement count reaches zero are
+** not effected by the sqlite3_interrupt().
+** ^A call to sqlite3_interrupt(D) that occurs when there are no running
+** SQL statements is a no-op and has no effect on SQL statements
+** that are started after the sqlite3_interrupt() call returns.
+*/
+void sqlite3_interrupt(sqlite3*);
+
+/*
+** CAPI3REF: Determine If An SQL Statement Is Complete
+**
+** These routines are useful during command-line input to determine if the
+** currently entered text seems to form a complete SQL statement or
+** if additional input is needed before sending the text into
+** SQLite for parsing.  ^These routines return 1 if the input string
+** appears to be a complete SQL statement.  ^A statement is judged to be
+** complete if it ends with a semicolon token and is not a prefix of a
+** well-formed CREATE TRIGGER statement.  ^Semicolons that are embedded within
+** string literals or quoted identifier names or comments are not
+** independent tokens (they are part of the token in which they are
+** embedded) and thus do not count as a statement terminator.  ^Whitespace
+** and comments that follow the final semicolon are ignored.
+**
+** ^These routines return 0 if the statement is incomplete.  ^If a
+** memory allocation fails, then SQLITE_NOMEM is returned.
+**
+** ^These routines do not parse the SQL statements thus
+** will not detect syntactically incorrect SQL.
+**
+** ^(If SQLite has not been initialized using [sqlite3_initialize()] prior
+** to invoking sqlite3_complete16() then sqlite3_initialize() is invoked
+** automatically by sqlite3_complete16().  If that initialization fails,
+** then the return value from sqlite3_complete16() will be non-zero
+** regardless of whether or not the input SQL is complete.)^
+**
+** The input to [sqlite3_complete()] must be a zero-terminated
+** UTF-8 string.
+**
+** The input to [sqlite3_complete16()] must be a zero-terminated
+** UTF-16 string in native byte order.
+*/
+int sqlite3_complete(const(char)* sql);
+int sqlite3_complete16(const(void)* sql);
+
+/*
+** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors
+** KEYWORDS: {busy-handler callback} {busy handler}
+** METHOD: sqlite3
+**
+** ^The sqlite3_busy_handler(D,X,P) routine sets a callback function X
+** that might be invoked with argument P whenever
+** an attempt is made to access a database table associated with
+** [database connection] D when another thread
+** or process has the table locked.
+** The sqlite3_busy_handler() interface is used to implement
+** [sqlite3_busy_timeout()] and [PRAGMA busy_timeout].
+**
+** ^If the busy callback is NULL, then [SQLITE_BUSY]
+** is returned immediately upon encountering the lock.  ^If the busy callback
+** is not NULL, then the callback might be invoked with two arguments.
+**
+** ^The first argument to the busy handler is a copy of the void* pointer which
+** is the third argument to sqlite3_busy_handler().  ^The second argument to
+** the busy handler callback is the number of times that the busy handler has
+** been invoked previously for the same locking event.  ^If the
+** busy callback returns 0, then no additional attempts are made to
+** access the database and [SQLITE_BUSY] is returned
+** to the application.
+** ^If the callback returns non-zero, then another attempt
+** is made to access the database and the cycle repeats.
+**
+** The presence of a busy handler does not guarantee that it will be invoked
+** when there is lock contention. ^If SQLite determines that invoking the busy
+** handler could result in a deadlock, it will go ahead and return [SQLITE_BUSY]
+** to the application instead of invoking the
+** busy handler.
+** Consider a scenario where one process is holding a read lock that
+** it is trying to promote to a reserved lock and
+** a second process is holding a reserved lock that it is trying
+** to promote to an exclusive lock.  The first process cannot proceed
+** because it is blocked by the second and the second process cannot
+** proceed because it is blocked by the first.  If both processes
+** invoke the busy handlers, neither will make any progress.  Therefore,
+** SQLite returns [SQLITE_BUSY] for the first process, hoping that this
+** will induce the first process to release its read lock and allow
+** the second process to proceed.
+**
+** ^The default busy callback is NULL.
+**
+** ^(There can only be a single busy handler defined for each
+** [database connection].  Setting a new busy handler clears any
+** previously set handler.)^  ^Note that calling [sqlite3_busy_timeout()]
+** or evaluating [PRAGMA busy_timeout=N] will change the
+** busy handler and thus clear any previously set busy handler.
+**
+** The busy callback should not take any actions which modify the
+** database connection that invoked the busy handler.  In other words,
+** the busy handler is not reentrant.  Any such actions
+** result in undefined behavior.
+**
+** A busy handler must not close the database connection
+** or [prepared statement] that invoked the busy handler.
+*/
+int sqlite3_busy_handler(sqlite3*, int function(void*, int), void*);
+
+/*
+** CAPI3REF: Set A Busy Timeout
+** METHOD: sqlite3
+**
+** ^This routine sets a [sqlite3_busy_handler | busy handler] that sleeps
+** for a specified amount of time when a table is locked.  ^The handler
+** will sleep multiple times until at least "ms" milliseconds of sleeping
+** have accumulated.  ^After at least "ms" milliseconds of sleeping,
+** the handler returns 0 which causes [sqlite3_step()] to return
+** [SQLITE_BUSY].
+**
+** ^Calling this routine with an argument less than or equal to zero
+** turns off all busy handlers.
+**
+** ^(There can only be a single busy handler for a particular
+** [database connection] at any given moment.  If another busy handler
+** was defined  (using [sqlite3_busy_handler()]) prior to calling
+** this routine, that other busy handler is cleared.)^
+**
+** See also:  [PRAGMA busy_timeout]
+*/
+int sqlite3_busy_timeout(sqlite3*, int ms);
+
+/*
+** CAPI3REF: Convenience Routines For Running Queries
+** METHOD: sqlite3
+**
+** This is a legacy interface that is preserved for backwards compatibility.
+** Use of this interface is not recommended.
+**
+** Definition: A <b>result table</b> is memory data structure created by the
+** [sqlite3_get_table()] interface.  A result table records the
+** complete query results from one or more queries.
+**
+** The table conceptually has a number of rows and columns.  But
+** these numbers are not part of the result table itself.  These
+** numbers are obtained separately.  Let N be the number of rows
+** and M be the number of columns.
+**
+** A result table is an array of pointers to zero-terminated UTF-8 strings.
+** There are (N+1)*M elements in the array.  The first M pointers point
+** to zero-terminated strings that  contain the names of the columns.
+** The remaining entries all point to query results.  NULL values result
+** in NULL pointers.  All other values are in their UTF-8 zero-terminated
+** string representation as returned by [sqlite3_column_text()].
+**
+** A result table might consist of one or more memory allocations.
+** It is not safe to pass a result table directly to [sqlite3_free()].
+** A result table should be deallocated using [sqlite3_free_table()].
+**
+** ^(As an example of the result table format, suppose a query result
+** is as follows:
+**
+** <blockquote><pre>
+**        Name        | Age
+**        -----------------------
+**        Alice       | 43
+**        Bob         | 28
+**        Cindy       | 21
+** </pre></blockquote>
+**
+** There are two column (M==2) and three rows (N==3).  Thus the
+** result table has 8 entries.  Suppose the result table is stored
+** in an array names azResult.  Then azResult holds this content:
+**
+** <blockquote><pre>
+**        azResult&#91;0] = "Name";
+**        azResult&#91;1] = "Age";
+**        azResult&#91;2] = "Alice";
+**        azResult&#91;3] = "43";
+**        azResult&#91;4] = "Bob";
+**        azResult&#91;5] = "28";
+**        azResult&#91;6] = "Cindy";
+**        azResult&#91;7] = "21";
+** </pre></blockquote>)^
+**
+** ^The sqlite3_get_table() function evaluates one or more
+** semicolon-separated SQL statements in the zero-terminated UTF-8
+** string of its 2nd parameter and returns a result table to the
+** pointer given in its 3rd parameter.
+**
+** After the application has finished with the result from sqlite3_get_table(),
+** it must pass the result table pointer to sqlite3_free_table() in order to
+** release the memory that was malloced.  Because of the way the
+** [sqlite3_malloc()] happens within sqlite3_get_table(), the calling
+** function must not try to call [sqlite3_free()] directly.  Only
+** [sqlite3_free_table()] is able to release the memory properly and safely.
+**
+** The sqlite3_get_table() interface is implemented as a wrapper around
+** [sqlite3_exec()].  The sqlite3_get_table() routine does not have access
+** to any internal data structures of SQLite.  It uses only the public
+** interface defined here.  As a consequence, errors that occur in the
+** wrapper layer outside of the internal [sqlite3_exec()] call are not
+** reflected in subsequent calls to [sqlite3_errcode()] or
+** [sqlite3_errmsg()].
+*/
+/* An open database */
+/* SQL to be evaluated */
+/* Results of the query */
+/* Number of result rows written here */
+/* Number of result columns written here */
+/* Error msg written here */
+int sqlite3_get_table(
+    sqlite3* db,
+    const(char)* zSql,
+    char*** pazResult,
+    int* pnRow,
+    int* pnColumn,
+    char** pzErrmsg);
+void sqlite3_free_table(char** result);
+
+/*
+** CAPI3REF: Formatted String Printing Functions
+**
+** These routines are work-alikes of the "printf()" family of functions
+** from the standard C library.
+** These routines understand most of the common formatting options from
+** the standard library printf()
+** plus some additional non-standard formats ([%q], [%Q], [%w], and [%z]).
+** See the [built-in printf()] documentation for details.
+**
+** ^The sqlite3_mprintf() and sqlite3_vmprintf() routines write their
+** results into memory obtained from [sqlite3_malloc64()].
+** The strings returned by these two routines should be
+** released by [sqlite3_free()].  ^Both routines return a
+** NULL pointer if [sqlite3_malloc64()] is unable to allocate enough
+** memory to hold the resulting string.
+**
+** ^(The sqlite3_snprintf() routine is similar to "snprintf()" from
+** the standard C library.  The result is written into the
+** buffer supplied as the second parameter whose size is given by
+** the first parameter. Note that the order of the
+** first two parameters is reversed from snprintf().)^  This is an
+** historical accident that cannot be fixed without breaking
+** backwards compatibility.  ^(Note also that sqlite3_snprintf()
+** returns a pointer to its buffer instead of the number of
+** characters actually written into the buffer.)^  We admit that
+** the number of characters written would be a more useful return
+** value but we cannot change the implementation of sqlite3_snprintf()
+** now without breaking compatibility.
+**
+** ^As long as the buffer size is greater than zero, sqlite3_snprintf()
+** guarantees that the buffer is always zero-terminated.  ^The first
+** parameter "n" is the total size of the buffer, including space for
+** the zero terminator.  So the longest string that can be completely
+** written will be n-1 characters.
+**
+** ^The sqlite3_vsnprintf() routine is a varargs version of sqlite3_snprintf().
+**
+** See also:  [built-in printf()], [printf() SQL function]
+*/
+char* sqlite3_mprintf(const(char)*, ...);
+char* sqlite3_vmprintf(const(char)*, va_list);
+char* sqlite3_snprintf(int, char*, const(char)*, ...);
+char* sqlite3_vsnprintf(int, char*, const(char)*, va_list);
+
+/*
+** CAPI3REF: Memory Allocation Subsystem
+**
+** The SQLite core uses these three routines for all of its own
+** internal memory allocation needs. "Core" in the previous sentence
+** does not include operating-system specific VFS implementation.  The
+** Windows VFS uses native malloc() and free() for some operations.
+**
+** ^The sqlite3_malloc() routine returns a pointer to a block
+** of memory at least N bytes in length, where N is the parameter.
+** ^If sqlite3_malloc() is unable to obtain sufficient free
+** memory, it returns a NULL pointer.  ^If the parameter N to
+** sqlite3_malloc() is zero or negative then sqlite3_malloc() returns
+** a NULL pointer.
+**
+** ^The sqlite3_malloc64(N) routine works just like
+** sqlite3_malloc(N) except that N is an unsigned 64-bit integer instead
+** of a signed 32-bit integer.
+**
+** ^Calling sqlite3_free() with a pointer previously returned
+** by sqlite3_malloc() or sqlite3_realloc() releases that memory so
+** that it might be reused.  ^The sqlite3_free() routine is
+** a no-op if is called with a NULL pointer.  Passing a NULL pointer
+** to sqlite3_free() is harmless.  After being freed, memory
+** should neither be read nor written.  Even reading previously freed
+** memory might result in a segmentation fault or other severe error.
+** Memory corruption, a segmentation fault, or other severe error
+** might result if sqlite3_free() is called with a non-NULL pointer that
+** was not obtained from sqlite3_malloc() or sqlite3_realloc().
+**
+** ^The sqlite3_realloc(X,N) interface attempts to resize a
+** prior memory allocation X to be at least N bytes.
+** ^If the X parameter to sqlite3_realloc(X,N)
+** is a NULL pointer then its behavior is identical to calling
+** sqlite3_malloc(N).
+** ^If the N parameter to sqlite3_realloc(X,N) is zero or
+** negative then the behavior is exactly the same as calling
+** sqlite3_free(X).
+** ^sqlite3_realloc(X,N) returns a pointer to a memory allocation
+** of at least N bytes in size or NULL if insufficient memory is available.
+** ^If M is the size of the prior allocation, then min(N,M) bytes
+** of the prior allocation are copied into the beginning of buffer returned
+** by sqlite3_realloc(X,N) and the prior allocation is freed.
+** ^If sqlite3_realloc(X,N) returns NULL and N is positive, then the
+** prior allocation is not freed.
+**
+** ^The sqlite3_realloc64(X,N) interfaces works the same as
+** sqlite3_realloc(X,N) except that N is a 64-bit unsigned integer instead
+** of a 32-bit signed integer.
+**
+** ^If X is a memory allocation previously obtained from sqlite3_malloc(),
+** sqlite3_malloc64(), sqlite3_realloc(), or sqlite3_realloc64(), then
+** sqlite3_msize(X) returns the size of that memory allocation in bytes.
+** ^The value returned by sqlite3_msize(X) might be larger than the number
+** of bytes requested when X was allocated.  ^If X is a NULL pointer then
+** sqlite3_msize(X) returns zero.  If X points to something that is not
+** the beginning of memory allocation, or if it points to a formerly
+** valid memory allocation that has now been freed, then the behavior
+** of sqlite3_msize(X) is undefined and possibly harmful.
+**
+** ^The memory returned by sqlite3_malloc(), sqlite3_realloc(),
+** sqlite3_malloc64(), and sqlite3_realloc64()
+** is always aligned to at least an 8 byte boundary, or to a
+** 4 byte boundary if the [SQLITE_4_BYTE_ALIGNED_MALLOC] compile-time
+** option is used.
+**
+** In SQLite version 3.5.0 and 3.5.1, it was possible to define
+** the SQLITE_OMIT_MEMORY_ALLOCATION which would cause the built-in
+** implementation of these routines to be omitted.  That capability
+** is no longer provided.  Only built-in memory allocators can be used.
+**
+** Prior to SQLite version 3.7.10, the Windows OS interface layer called
+** the system malloc() and free() directly when converting
+** filenames between the UTF-8 encoding used by SQLite
+** and whatever filename encoding is used by the particular Windows
+** installation.  Memory allocation errors were detected, but
+** they were reported back as [SQLITE_CANTOPEN] or
+** [SQLITE_IOERR] rather than [SQLITE_NOMEM].
+**
+** The pointer arguments to [sqlite3_free()] and [sqlite3_realloc()]
+** must be either NULL or else pointers obtained from a prior
+** invocation of [sqlite3_malloc()] or [sqlite3_realloc()] that have
+** not yet been released.
+**
+** The application must not read or write any part of
+** a block of memory after it has been released using
+** [sqlite3_free()] or [sqlite3_realloc()].
+*/
+void* sqlite3_malloc(int);
+void* sqlite3_malloc64(sqlite3_uint64);
+void* sqlite3_realloc(void*, int);
+void* sqlite3_realloc64(void*, sqlite3_uint64);
+void sqlite3_free(void*);
+sqlite3_uint64 sqlite3_msize(void*);
+
+/*
+** CAPI3REF: Memory Allocator Statistics
+**
+** SQLite provides these two interfaces for reporting on the status
+** of the [sqlite3_malloc()], [sqlite3_free()], and [sqlite3_realloc()]
+** routines, which form the built-in memory allocation subsystem.
+**
+** ^The [sqlite3_memory_used()] routine returns the number of bytes
+** of memory currently outstanding (malloced but not freed).
+** ^The [sqlite3_memory_highwater()] routine returns the maximum
+** value of [sqlite3_memory_used()] since the high-water mark
+** was last reset.  ^The values returned by [sqlite3_memory_used()] and
+** [sqlite3_memory_highwater()] include any overhead
+** added by SQLite in its implementation of [sqlite3_malloc()],
+** but not overhead added by the any underlying system library
+** routines that [sqlite3_malloc()] may call.
+**
+** ^The memory high-water mark is reset to the current value of
+** [sqlite3_memory_used()] if and only if the parameter to
+** [sqlite3_memory_highwater()] is true.  ^The value returned
+** by [sqlite3_memory_highwater(1)] is the high-water mark
+** prior to the reset.
+*/
+sqlite3_int64 sqlite3_memory_used();
+sqlite3_int64 sqlite3_memory_highwater(int resetFlag);
+
+/*
+** CAPI3REF: Pseudo-Random Number Generator
+**
+** SQLite contains a high-quality pseudo-random number generator (PRNG) used to
+** select random [ROWID | ROWIDs] when inserting new records into a table that
+** already uses the largest possible [ROWID].  The PRNG is also used for
+** the build-in random() and randomblob() SQL functions.  This interface allows
+** applications to access the same PRNG for other purposes.
+**
+** ^A call to this routine stores N bytes of randomness into buffer P.
+** ^The P parameter can be a NULL pointer.
+**
+** ^If this routine has not been previously called or if the previous
+** call had N less than one or a NULL pointer for P, then the PRNG is
+** seeded using randomness obtained from the xRandomness method of
+** the default [sqlite3_vfs] object.
+** ^If the previous call to this routine had an N of 1 or more and a
+** non-NULL P then the pseudo-randomness is generated
+** internally and without recourse to the [sqlite3_vfs] xRandomness
+** method.
+*/
+void sqlite3_randomness(int N, void* P);
+
+/*
+** CAPI3REF: Compile-Time Authorization Callbacks
+** METHOD: sqlite3
+** KEYWORDS: {authorizer callback}
+**
+** ^This routine registers an authorizer callback with a particular
+** [database connection], supplied in the first argument.
+** ^The authorizer callback is invoked as SQL statements are being compiled
+** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
+** [sqlite3_prepare_v3()], [sqlite3_prepare16()], [sqlite3_prepare16_v2()],
+** and [sqlite3_prepare16_v3()].  ^At various
+** points during the compilation process, as logic is being created
+** to perform various actions, the authorizer callback is invoked to
+** see if those actions are allowed.  ^The authorizer callback should
+** return [SQLITE_OK] to allow the action, [SQLITE_IGNORE] to disallow the
+** specific action but allow the SQL statement to continue to be
+** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be
+** rejected with an error.  ^If the authorizer callback returns
+** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY]
+** then the [sqlite3_prepare_v2()] or equivalent call that triggered
+** the authorizer will fail with an error message.
+**
+** When the callback returns [SQLITE_OK], that means the operation
+** requested is ok.  ^When the callback returns [SQLITE_DENY], the
+** [sqlite3_prepare_v2()] or equivalent call that triggered the
+** authorizer will fail with an error message explaining that
+** access is denied.
+**
+** ^The first parameter to the authorizer callback is a copy of the third
+** parameter to the sqlite3_set_authorizer() interface. ^The second parameter
+** to the callback is an integer [SQLITE_COPY | action code] that specifies
+** the particular action to be authorized. ^The third through sixth parameters
+** to the callback are either NULL pointers or zero-terminated strings
+** that contain additional details about the action to be authorized.
+** Applications must always be prepared to encounter a NULL pointer in any
+** of the third through the sixth parameters of the authorization callback.
+**
+** ^If the action code is [SQLITE_READ]
+** and the callback returns [SQLITE_IGNORE] then the
+** [prepared statement] statement is constructed to substitute
+** a NULL value in place of the table column that would have
+** been read if [SQLITE_OK] had been returned.  The [SQLITE_IGNORE]
+** return can be used to deny an untrusted user access to individual
+** columns of a table.
+** ^When a table is referenced by a [SELECT] but no column values are
+** extracted from that table (for example in a query like
+** "SELECT count(*) FROM tab") then the [SQLITE_READ] authorizer callback
+** is invoked once for that table with a column name that is an empty string.
+** ^If the action code is [SQLITE_DELETE] and the callback returns
+** [SQLITE_IGNORE] then the [DELETE] operation proceeds but the
+** [truncate optimization] is disabled and all rows are deleted individually.
+**
+** An authorizer is used when [sqlite3_prepare | preparing]
+** SQL statements from an untrusted source, to ensure that the SQL statements
+** do not try to access data they are not allowed to see, or that they do not
+** try to execute malicious statements that damage the database.  For
+** example, an application may allow a user to enter arbitrary
+** SQL queries for evaluation by a database.  But the application does
+** not want the user to be able to make arbitrary changes to the
+** database.  An authorizer could then be put in place while the
+** user-entered SQL is being [sqlite3_prepare | prepared] that
+** disallows everything except [SELECT] statements.
+**
+** Applications that need to process SQL from untrusted sources
+** might also consider lowering resource limits using [sqlite3_limit()]
+** and limiting database size using the [max_page_count] [PRAGMA]
+** in addition to using an authorizer.
+**
+** ^(Only a single authorizer can be in place on a database connection
+** at a time.  Each call to sqlite3_set_authorizer overrides the
+** previous call.)^  ^Disable the authorizer by installing a NULL callback.
+** The authorizer is disabled by default.
+**
+** The authorizer callback must not do anything that will modify
+** the database connection that invoked the authorizer callback.
+** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
+** database connections for the meaning of "modify" in this paragraph.
+**
+** ^When [sqlite3_prepare_v2()] is used to prepare a statement, the
+** statement might be re-prepared during [sqlite3_step()] due to a
+** schema change.  Hence, the application should ensure that the
+** correct authorizer callback remains in place during the [sqlite3_step()].
+**
+** ^Note that the authorizer callback is invoked only during
+** [sqlite3_prepare()] or its variants.  Authorization is not
+** performed during statement evaluation in [sqlite3_step()], unless
+** as stated in the previous paragraph, sqlite3_step() invokes
+** sqlite3_prepare_v2() to reprepare a statement after a schema change.
+*/
+int sqlite3_set_authorizer(
+    sqlite3*,
+    int function(void*, int, const(char)*, const(char)*, const(char)*, const(char)*) xAuth,
+    void* pUserData);
+
+/*
+** CAPI3REF: Authorizer Return Codes
+**
+** The [sqlite3_set_authorizer | authorizer callback function] must
+** return either [SQLITE_OK] or one of these two constants in order
+** to signal SQLite whether or not the action is permitted.  See the
+** [sqlite3_set_authorizer | authorizer documentation] for additional
+** information.
+**
+** Note that SQLITE_IGNORE is also used as a [conflict resolution mode]
+** returned from the [sqlite3_vtab_on_conflict()] interface.
+*/
+enum SQLITE_DENY = 1; /* Abort the SQL statement with an error */
+enum SQLITE_IGNORE = 2; /* Don't allow access, but don't generate an error */
+
+/*
+** CAPI3REF: Authorizer Action Codes
+**
+** The [sqlite3_set_authorizer()] interface registers a callback function
+** that is invoked to authorize certain SQL statement actions.  The
+** second parameter to the callback is an integer code that specifies
+** what action is being authorized.  These are the integer action codes that
+** the authorizer callback may be passed.
+**
+** These action code values signify what kind of operation is to be
+** authorized.  The 3rd and 4th parameters to the authorization
+** callback function will be parameters or NULL depending on which of these
+** codes is used as the second parameter.  ^(The 5th parameter to the
+** authorizer callback is the name of the database ("main", "temp",
+** etc.) if applicable.)^  ^The 6th parameter to the authorizer callback
+** is the name of the inner-most trigger or view that is responsible for
+** the access attempt or NULL if this access attempt is directly from
+** top-level SQL code.
+*/
+/******************************************* 3rd ************ 4th ***********/
+enum SQLITE_CREATE_INDEX = 1; /* Index Name      Table Name      */
+enum SQLITE_CREATE_TABLE = 2; /* Table Name      NULL            */
+enum SQLITE_CREATE_TEMP_INDEX = 3; /* Index Name      Table Name      */
+enum SQLITE_CREATE_TEMP_TABLE = 4; /* Table Name      NULL            */
+enum SQLITE_CREATE_TEMP_TRIGGER = 5; /* Trigger Name    Table Name      */
+enum SQLITE_CREATE_TEMP_VIEW = 6; /* View Name       NULL            */
+enum SQLITE_CREATE_TRIGGER = 7; /* Trigger Name    Table Name      */
+enum SQLITE_CREATE_VIEW = 8; /* View Name       NULL            */
+enum SQLITE_DELETE = 9; /* Table Name      NULL            */
+enum SQLITE_DROP_INDEX = 10; /* Index Name      Table Name      */
+enum SQLITE_DROP_TABLE = 11; /* Table Name      NULL            */
+enum SQLITE_DROP_TEMP_INDEX = 12; /* Index Name      Table Name      */
+enum SQLITE_DROP_TEMP_TABLE = 13; /* Table Name      NULL            */
+enum SQLITE_DROP_TEMP_TRIGGER = 14; /* Trigger Name    Table Name      */
+enum SQLITE_DROP_TEMP_VIEW = 15; /* View Name       NULL            */
+enum SQLITE_DROP_TRIGGER = 16; /* Trigger Name    Table Name      */
+enum SQLITE_DROP_VIEW = 17; /* View Name       NULL            */
+enum SQLITE_INSERT = 18; /* Table Name      NULL            */
+enum SQLITE_PRAGMA = 19; /* Pragma Name     1st arg or NULL */
+enum SQLITE_READ = 20; /* Table Name      Column Name     */
+enum SQLITE_SELECT = 21; /* NULL            NULL            */
+enum SQLITE_TRANSACTION = 22; /* Operation       NULL            */
+enum SQLITE_UPDATE = 23; /* Table Name      Column Name     */
+enum SQLITE_ATTACH = 24; /* Filename        NULL            */
+enum SQLITE_DETACH = 25; /* Database Name   NULL            */
+enum SQLITE_ALTER_TABLE = 26; /* Database Name   Table Name      */
+enum SQLITE_REINDEX = 27; /* Index Name      NULL            */
+enum SQLITE_ANALYZE = 28; /* Table Name      NULL            */
+enum SQLITE_CREATE_VTABLE = 29; /* Table Name      Module Name     */
+enum SQLITE_DROP_VTABLE = 30; /* Table Name      Module Name     */
+enum SQLITE_FUNCTION = 31; /* NULL            Function Name   */
+enum SQLITE_SAVEPOINT = 32; /* Operation       Savepoint Name  */
+enum SQLITE_COPY = 0; /* No longer used */
+enum SQLITE_RECURSIVE = 33; /* NULL            NULL            */
+
+/*
+** CAPI3REF: Tracing And Profiling Functions
+** METHOD: sqlite3
+**
+** These routines are deprecated. Use the [sqlite3_trace_v2()] interface
+** instead of the routines described here.
+**
+** These routines register callback functions that can be used for
+** tracing and profiling the execution of SQL statements.
+**
+** ^The callback function registered by sqlite3_trace() is invoked at
+** various times when an SQL statement is being run by [sqlite3_step()].
+** ^The sqlite3_trace() callback is invoked with a UTF-8 rendering of the
+** SQL statement text as the statement first begins executing.
+** ^(Additional sqlite3_trace() callbacks might occur
+** as each triggered subprogram is entered.  The callbacks for triggers
+** contain a UTF-8 SQL comment that identifies the trigger.)^
+**
+** The [SQLITE_TRACE_SIZE_LIMIT] compile-time option can be used to limit
+** the length of [bound parameter] expansion in the output of sqlite3_trace().
+**
+** ^The callback function registered by sqlite3_profile() is invoked
+** as each SQL statement finishes.  ^The profile callback contains
+** the original statement text and an estimate of wall-clock time
+** of how long that statement took to run.  ^The profile callback
+** time is in units of nanoseconds, however the current implementation
+** is only capable of millisecond resolution so the six least significant
+** digits in the time are meaningless.  Future versions of SQLite
+** might provide greater resolution on the profiler callback.  The
+** sqlite3_profile() function is considered experimental and is
+** subject to change in future versions of SQLite.
+*/
+void* sqlite3_trace(sqlite3*, void function(void*, const(char)*) xTrace, void*);
+void* sqlite3_profile(
+    sqlite3*,
+    void function(void*, const(char)*, sqlite3_uint64) xProfile,
+    void*);
+
+/*
+** CAPI3REF: SQL Trace Event Codes
+** KEYWORDS: SQLITE_TRACE
+**
+** These constants identify classes of events that can be monitored
+** using the [sqlite3_trace_v2()] tracing logic.  The M argument
+** to [sqlite3_trace_v2(D,M,X,P)] is an OR-ed combination of one or more of
+** the following constants.  ^The first argument to the trace callback
+** is one of the following constants.
+**
+** New tracing constants may be added in future releases.
+**
+** ^A trace callback has four arguments: xCallback(T,C,P,X).
+** ^The T argument is one of the integer type codes above.
+** ^The C argument is a copy of the context pointer passed in as the
+** fourth argument to [sqlite3_trace_v2()].
+** The P and X arguments are pointers whose meanings depend on T.
+**
+** <dl>
+** [[SQLITE_TRACE_STMT]] <dt>SQLITE_TRACE_STMT</dt>
+** <dd>^An SQLITE_TRACE_STMT callback is invoked when a prepared statement
+** first begins running and possibly at other times during the
+** execution of the prepared statement, such as at the start of each
+** trigger subprogram. ^The P argument is a pointer to the
+** [prepared statement]. ^The X argument is a pointer to a string which
+** is the unexpanded SQL text of the prepared statement or an SQL comment
+** that indicates the invocation of a trigger.  ^The callback can compute
+** the same text that would have been returned by the legacy [sqlite3_trace()]
+** interface by using the X argument when X begins with "--" and invoking
+** [sqlite3_expanded_sql(P)] otherwise.
+**
+** [[SQLITE_TRACE_PROFILE]] <dt>SQLITE_TRACE_PROFILE</dt>
+** <dd>^An SQLITE_TRACE_PROFILE callback provides approximately the same
+** information as is provided by the [sqlite3_profile()] callback.
+** ^The P argument is a pointer to the [prepared statement] and the
+** X argument points to a 64-bit integer which is the estimated of
+** the number of nanosecond that the prepared statement took to run.
+** ^The SQLITE_TRACE_PROFILE callback is invoked when the statement finishes.
+**
+** [[SQLITE_TRACE_ROW]] <dt>SQLITE_TRACE_ROW</dt>
+** <dd>^An SQLITE_TRACE_ROW callback is invoked whenever a prepared
+** statement generates a single row of result.
+** ^The P argument is a pointer to the [prepared statement] and the
+** X argument is unused.
+**
+** [[SQLITE_TRACE_CLOSE]] <dt>SQLITE_TRACE_CLOSE</dt>
+** <dd>^An SQLITE_TRACE_CLOSE callback is invoked when a database
+** connection closes.
+** ^The P argument is a pointer to the [database connection] object
+** and the X argument is unused.
+** </dl>
+*/
+enum SQLITE_TRACE_STMT = 0x01;
+enum SQLITE_TRACE_PROFILE = 0x02;
+enum SQLITE_TRACE_ROW = 0x04;
+enum SQLITE_TRACE_CLOSE = 0x08;
+
+/*
+** CAPI3REF: SQL Trace Hook
+** METHOD: sqlite3
+**
+** ^The sqlite3_trace_v2(D,M,X,P) interface registers a trace callback
+** function X against [database connection] D, using property mask M
+** and context pointer P.  ^If the X callback is
+** NULL or if the M mask is zero, then tracing is disabled.  The
+** M argument should be the bitwise OR-ed combination of
+** zero or more [SQLITE_TRACE] constants.
+**
+** ^Each call to either sqlite3_trace() or sqlite3_trace_v2() overrides
+** (cancels) any prior calls to sqlite3_trace() or sqlite3_trace_v2().
+**
+** ^The X callback is invoked whenever any of the events identified by
+** mask M occur.  ^The integer return value from the callback is currently
+** ignored, though this may change in future releases.  Callback
+** implementations should return zero to ensure future compatibility.
+**
+** ^A trace callback is invoked with four arguments: callback(T,C,P,X).
+** ^The T argument is one of the [SQLITE_TRACE]
+** constants to indicate why the callback was invoked.
+** ^The C argument is a copy of the context pointer.
+** The P and X arguments are pointers whose meanings depend on T.
+**
+** The sqlite3_trace_v2() interface is intended to replace the legacy
+** interfaces [sqlite3_trace()] and [sqlite3_profile()], both of which
+** are deprecated.
+*/
+int sqlite3_trace_v2(
+    sqlite3*,
+    uint uMask,
+    int function(uint, void*, void*, void*) xCallback,
+    void* pCtx);
+
+/*
+** CAPI3REF: Query Progress Callbacks
+** METHOD: sqlite3
+**
+** ^The sqlite3_progress_handler(D,N,X,P) interface causes the callback
+** function X to be invoked periodically during long running calls to
+** [sqlite3_exec()], [sqlite3_step()] and [sqlite3_get_table()] for
+** database connection D.  An example use for this
+** interface is to keep a GUI updated during a large query.
+**
+** ^The parameter P is passed through as the only parameter to the
+** callback function X.  ^The parameter N is the approximate number of
+** [virtual machine instructions] that are evaluated between successive
+** invocations of the callback X.  ^If N is less than one then the progress
+** handler is disabled.
+**
+** ^Only a single progress handler may be defined at one time per
+** [database connection]; setting a new progress handler cancels the
+** old one.  ^Setting parameter X to NULL disables the progress handler.
+** ^The progress handler is also disabled by setting N to a value less
+** than 1.
+**
+** ^If the progress callback returns non-zero, the operation is
+** interrupted.  This feature can be used to implement a
+** "Cancel" button on a GUI progress dialog box.
+**
+** The progress handler callback must not do anything that will modify
+** the database connection that invoked the progress handler.
+** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
+** database connections for the meaning of "modify" in this paragraph.
+**
+*/
+void sqlite3_progress_handler(sqlite3*, int, int function(void*), void*);
+
+/*
+** CAPI3REF: Opening A New Database Connection
+** CONSTRUCTOR: sqlite3
+**
+** ^These routines open an SQLite database file as specified by the
+** filename argument. ^The filename argument is interpreted as UTF-8 for
+** sqlite3_open() and sqlite3_open_v2() and as UTF-16 in the native byte
+** order for sqlite3_open16(). ^(A [database connection] handle is usually
+** returned in *ppDb, even if an error occurs.  The only exception is that
+** if SQLite is unable to allocate memory to hold the [sqlite3] object,
+** a NULL will be written into *ppDb instead of a pointer to the [sqlite3]
+** object.)^ ^(If the database is opened (and/or created) successfully, then
+** [SQLITE_OK] is returned.  Otherwise an [error code] is returned.)^ ^The
+** [sqlite3_errmsg()] or [sqlite3_errmsg16()] routines can be used to obtain
+** an English language description of the error following a failure of any
+** of the sqlite3_open() routines.
+**
+** ^The default encoding will be UTF-8 for databases created using
+** sqlite3_open() or sqlite3_open_v2().  ^The default encoding for databases
+** created using sqlite3_open16() will be UTF-16 in the native byte order.
+**
+** Whether or not an error occurs when it is opened, resources
+** associated with the [database connection] handle should be released by
+** passing it to [sqlite3_close()] when it is no longer required.
+**
+** The sqlite3_open_v2() interface works like sqlite3_open()
+** except that it accepts two additional parameters for additional control
+** over the new database connection.  ^(The flags parameter to
+** sqlite3_open_v2() can take one of
+** the following three values, optionally combined with the
+** [SQLITE_OPEN_NOMUTEX], [SQLITE_OPEN_FULLMUTEX], [SQLITE_OPEN_SHAREDCACHE],
+** [SQLITE_OPEN_PRIVATECACHE], and/or [SQLITE_OPEN_URI] flags:)^
+**
+** <dl>
+** ^(<dt>[SQLITE_OPEN_READONLY]</dt>
+** <dd>The database is opened in read-only mode.  If the database does not
+** already exist, an error is returned.</dd>)^
+**
+** ^(<dt>[SQLITE_OPEN_READWRITE]</dt>
+** <dd>The database is opened for reading and writing if possible, or reading
+** only if the file is write protected by the operating system.  In either
+** case the database must already exist, otherwise an error is returned.</dd>)^
+**
+** ^(<dt>[SQLITE_OPEN_READWRITE] | [SQLITE_OPEN_CREATE]</dt>
+** <dd>The database is opened for reading and writing, and is created if
+** it does not already exist. This is the behavior that is always used for
+** sqlite3_open() and sqlite3_open16().</dd>)^
+** </dl>
+**
+** If the 3rd parameter to sqlite3_open_v2() is not one of the
+** combinations shown above optionally combined with other
+** [SQLITE_OPEN_READONLY | SQLITE_OPEN_* bits]
+** then the behavior is undefined.
+**
+** ^If the [SQLITE_OPEN_NOMUTEX] flag is set, then the database connection
+** opens in the multi-thread [threading mode] as long as the single-thread
+** mode has not been set at compile-time or start-time.  ^If the
+** [SQLITE_OPEN_FULLMUTEX] flag is set then the database connection opens
+** in the serialized [threading mode] unless single-thread was
+** previously selected at compile-time or start-time.
+** ^The [SQLITE_OPEN_SHAREDCACHE] flag causes the database connection to be
+** eligible to use [shared cache mode], regardless of whether or not shared
+** cache is enabled using [sqlite3_enable_shared_cache()].  ^The
+** [SQLITE_OPEN_PRIVATECACHE] flag causes the database connection to not
+** participate in [shared cache mode] even if it is enabled.
+**
+** ^The fourth parameter to sqlite3_open_v2() is the name of the
+** [sqlite3_vfs] object that defines the operating system interface that
+** the new database connection should use.  ^If the fourth parameter is
+** a NULL pointer then the default [sqlite3_vfs] object is used.
+**
+** ^If the filename is ":memory:", then a private, temporary in-memory database
+** is created for the connection.  ^This in-memory database will vanish when
+** the database connection is closed.  Future versions of SQLite might
+** make use of additional special filenames that begin with the ":" character.
+** It is recommended that when a database filename actually does begin with
+** a ":" character you should prefix the filename with a pathname such as
+** "./" to avoid ambiguity.
+**
+** ^If the filename is an empty string, then a private, temporary
+** on-disk database will be created.  ^This private database will be
+** automatically deleted as soon as the database connection is closed.
+**
+** [[URI filenames in sqlite3_open()]] <h3>URI Filenames</h3>
+**
+** ^If [URI filename] interpretation is enabled, and the filename argument
+** begins with "file:", then the filename is interpreted as a URI. ^URI
+** filename interpretation is enabled if the [SQLITE_OPEN_URI] flag is
+** set in the third argument to sqlite3_open_v2(), or if it has
+** been enabled globally using the [SQLITE_CONFIG_URI] option with the
+** [sqlite3_config()] method or by the [SQLITE_USE_URI] compile-time option.
+** URI filename interpretation is turned off
+** by default, but future releases of SQLite might enable URI filename
+** interpretation by default.  See "[URI filenames]" for additional
+** information.
+**
+** URI filenames are parsed according to RFC 3986. ^If the URI contains an
+** authority, then it must be either an empty string or the string
+** "localhost". ^If the authority is not an empty string or "localhost", an
+** error is returned to the caller. ^The fragment component of a URI, if
+** present, is ignored.
+**
+** ^SQLite uses the path component of the URI as the name of the disk file
+** which contains the database. ^If the path begins with a '/' character,
+** then it is interpreted as an absolute path. ^If the path does not begin
+** with a '/' (meaning that the authority section is omitted from the URI)
+** then the path is interpreted as a relative path.
+** ^(On windows, the first component of an absolute path
+** is a drive specification (e.g. "C:").)^
+**
+** [[core URI query parameters]]
+** The query component of a URI may contain parameters that are interpreted
+** either by SQLite itself, or by a [VFS | custom VFS implementation].
+** SQLite and its built-in [VFSes] interpret the
+** following query parameters:
+**
+** <ul>
+**   <li> <b>vfs</b>: ^The "vfs" parameter may be used to specify the name of
+**     a VFS object that provides the operating system interface that should
+**     be used to access the database file on disk. ^If this option is set to
+**     an empty string the default VFS object is used. ^Specifying an unknown
+**     VFS is an error. ^If sqlite3_open_v2() is used and the vfs option is
+**     present, then the VFS specified by the option takes precedence over
+**     the value passed as the fourth parameter to sqlite3_open_v2().
+**
+**   <li> <b>mode</b>: ^(The mode parameter may be set to either "ro", "rw",
+**     "rwc", or "memory". Attempting to set it to any other value is
+**     an error)^.
+**     ^If "ro" is specified, then the database is opened for read-only
+**     access, just as if the [SQLITE_OPEN_READONLY] flag had been set in the
+**     third argument to sqlite3_open_v2(). ^If the mode option is set to
+**     "rw", then the database is opened for read-write (but not create)
+**     access, as if SQLITE_OPEN_READWRITE (but not SQLITE_OPEN_CREATE) had
+**     been set. ^Value "rwc" is equivalent to setting both
+**     SQLITE_OPEN_READWRITE and SQLITE_OPEN_CREATE.  ^If the mode option is
+**     set to "memory" then a pure [in-memory database] that never reads
+**     or writes from disk is used. ^It is an error to specify a value for
+**     the mode parameter that is less restrictive than that specified by
+**     the flags passed in the third parameter to sqlite3_open_v2().
+**
+**   <li> <b>cache</b>: ^The cache parameter may be set to either "shared" or
+**     "private". ^Setting it to "shared" is equivalent to setting the
+**     SQLITE_OPEN_SHAREDCACHE bit in the flags argument passed to
+**     sqlite3_open_v2(). ^Setting the cache parameter to "private" is
+**     equivalent to setting the SQLITE_OPEN_PRIVATECACHE bit.
+**     ^If sqlite3_open_v2() is used and the "cache" parameter is present in
+**     a URI filename, its value overrides any behavior requested by setting
+**     SQLITE_OPEN_PRIVATECACHE or SQLITE_OPEN_SHAREDCACHE flag.
+**
+**  <li> <b>psow</b>: ^The psow parameter indicates whether or not the
+**     [powersafe overwrite] property does or does not apply to the
+**     storage media on which the database file resides.
+**
+**  <li> <b>nolock</b>: ^The nolock parameter is a boolean query parameter
+**     which if set disables file locking in rollback journal modes.  This
+**     is useful for accessing a database on a filesystem that does not
+**     support locking.  Caution:  Database corruption might result if two
+**     or more processes write to the same database and any one of those
+**     processes uses nolock=1.
+**
+**  <li> <b>immutable</b>: ^The immutable parameter is a boolean query
+**     parameter that indicates that the database file is stored on
+**     read-only media.  ^When immutable is set, SQLite assumes that the
+**     database file cannot be changed, even by a process with higher
+**     privilege, and so the database is opened read-only and all locking
+**     and change detection is disabled.  Caution: Setting the immutable
+**     property on a database file that does in fact change can result
+**     in incorrect query results and/or [SQLITE_CORRUPT] errors.
+**     See also: [SQLITE_IOCAP_IMMUTABLE].
+**
+** </ul>
+**
+** ^Specifying an unknown parameter in the query component of a URI is not an
+** error.  Future versions of SQLite might understand additional query
+** parameters.  See "[query parameters with special meaning to SQLite]" for
+** additional information.
+**
+** [[URI filename examples]] <h3>URI filename examples</h3>
+**
+** <table border="1" align=center cellpadding=5>
+** <tr><th> URI filenames <th> Results
+** <tr><td> file:data.db <td>
+**          Open the file "data.db" in the current directory.
+** <tr><td> file:/home/fred/data.db<br>
+**          file:///home/fred/data.db <br>
+**          file://localhost/home/fred/data.db <br> <td>
+**          Open the database file "/home/fred/data.db".
+** <tr><td> file://darkstar/home/fred/data.db <td>
+**          An error. "darkstar" is not a recognized authority.
+** <tr><td style="white-space:nowrap">
+**          file:///C:/Documents%20and%20Settings/fred/Desktop/data.db
+**     <td> Windows only: Open the file "data.db" on fred's desktop on drive
+**          C:. Note that the %20 escaping in this example is not strictly
+**          necessary - space characters can be used literally
+**          in URI filenames.
+** <tr><td> file:data.db?mode=ro&cache=private <td>
+**          Open file "data.db" in the current directory for read-only access.
+**          Regardless of whether or not shared-cache mode is enabled by
+**          default, use a private cache.
+** <tr><td> file:/home/fred/data.db?vfs=unix-dotfile <td>
+**          Open file "/home/fred/data.db". Use the special VFS "unix-dotfile"
+**          that uses dot-files in place of posix advisory locking.
+** <tr><td> file:data.db?mode=readonly <td>
+**          An error. "readonly" is not a valid option for the "mode" parameter.
+** </table>
+**
+** ^URI hexadecimal escape sequences (%HH) are supported within the path and
+** query components of a URI. A hexadecimal escape sequence consists of a
+** percent sign - "%" - followed by exactly two hexadecimal digits
+** specifying an octet value. ^Before the path or query components of a
+** URI filename are interpreted, they are encoded using UTF-8 and all
+** hexadecimal escape sequences replaced by a single byte containing the
+** corresponding octet. If this process generates an invalid UTF-8 encoding,
+** the results are undefined.
+**
+** <b>Note to Windows users:</b>  The encoding used for the filename argument
+** of sqlite3_open() and sqlite3_open_v2() must be UTF-8, not whatever
+** codepage is currently defined.  Filenames containing international
+** characters must be converted to UTF-8 prior to passing them into
+** sqlite3_open() or sqlite3_open_v2().
+**
+** <b>Note to Windows Runtime users:</b>  The temporary directory must be set
+** prior to calling sqlite3_open() or sqlite3_open_v2().  Otherwise, various
+** features that require the use of temporary files may fail.
+**
+** See also: [sqlite3_temp_directory]
+*/
+/* Database filename (UTF-8) */
+/* OUT: SQLite db handle */
+int sqlite3_open(const(char)* filename, sqlite3** ppDb);
+
+/* Database filename (UTF-16) */
+/* OUT: SQLite db handle */
+int sqlite3_open16(const(void)* filename, sqlite3** ppDb);
+
+/* Database filename (UTF-8) */
+/* OUT: SQLite db handle */
+/* Flags */
+/* Name of VFS module to use */
+int sqlite3_open_v2(
+    const(char)* filename,
+    sqlite3** ppDb,
+    int flags,
+    const(char)* zVfs);
+
+/*
+** CAPI3REF: Obtain Values For URI Parameters
+**
+** These are utility routines, useful to VFS implementations, that check
+** to see if a database file was a URI that contained a specific query
+** parameter, and if so obtains the value of that query parameter.
+**
+** If F is the database filename pointer passed into the xOpen() method of
+** a VFS implementation when the flags parameter to xOpen() has one or
+** more of the [SQLITE_OPEN_URI] or [SQLITE_OPEN_MAIN_DB] bits set and
+** P is the name of the query parameter, then
+** sqlite3_uri_parameter(F,P) returns the value of the P
+** parameter if it exists or a NULL pointer if P does not appear as a
+** query parameter on F.  If P is a query parameter of F
+** has no explicit value, then sqlite3_uri_parameter(F,P) returns
+** a pointer to an empty string.
+**
+** The sqlite3_uri_boolean(F,P,B) routine assumes that P is a boolean
+** parameter and returns true (1) or false (0) according to the value
+** of P.  The sqlite3_uri_boolean(F,P,B) routine returns true (1) if the
+** value of query parameter P is one of "yes", "true", or "on" in any
+** case or if the value begins with a non-zero number.  The
+** sqlite3_uri_boolean(F,P,B) routines returns false (0) if the value of
+** query parameter P is one of "no", "false", or "off" in any case or
+** if the value begins with a numeric zero.  If P is not a query
+** parameter on F or if the value of P is does not match any of the
+** above, then sqlite3_uri_boolean(F,P,B) returns (B!=0).
+**
+** The sqlite3_uri_int64(F,P,D) routine converts the value of P into a
+** 64-bit signed integer and returns that integer, or D if P does not
+** exist.  If the value of P is something other than an integer, then
+** zero is returned.
+**
+** If F is a NULL pointer, then sqlite3_uri_parameter(F,P) returns NULL and
+** sqlite3_uri_boolean(F,P,B) returns B.  If F is not a NULL pointer and
+** is not a database file pathname pointer that SQLite passed into the xOpen
+** VFS method, then the behavior of this routine is undefined and probably
+** undesirable.
+*/
+const(char)* sqlite3_uri_parameter(const(char)* zFilename, const(char)* zParam);
+int sqlite3_uri_boolean(const(char)* zFile, const(char)* zParam, int bDefault);
+sqlite3_int64 sqlite3_uri_int64(const(char)*, const(char)*, sqlite3_int64);
+
+/*
+** CAPI3REF: Error Codes And Messages
+** METHOD: sqlite3
+**
+** ^If the most recent sqlite3_* API call associated with
+** [database connection] D failed, then the sqlite3_errcode(D) interface
+** returns the numeric [result code] or [extended result code] for that
+** API call.
+** ^The sqlite3_extended_errcode()
+** interface is the same except that it always returns the
+** [extended result code] even when extended result codes are
+** disabled.
+**
+** The values returned by sqlite3_errcode() and/or
+** sqlite3_extended_errcode() might change with each API call.
+** Except, there are some interfaces that are guaranteed to never
+** change the value of the error code.  The error-code preserving
+** interfaces are:
+**
+** <ul>
+** <li> sqlite3_errcode()
+** <li> sqlite3_extended_errcode()
+** <li> sqlite3_errmsg()
+** <li> sqlite3_errmsg16()
+** </ul>
+**
+** ^The sqlite3_errmsg() and sqlite3_errmsg16() return English-language
+** text that describes the error, as either UTF-8 or UTF-16 respectively.
+** ^(Memory to hold the error message string is managed internally.
+** The application does not need to worry about freeing the result.
+** However, the error string might be overwritten or deallocated by
+** subsequent calls to other SQLite interface functions.)^
+**
+** ^The sqlite3_errstr() interface returns the English-language text
+** that describes the [result code], as UTF-8.
+** ^(Memory to hold the error message string is managed internally
+** and must not be freed by the application)^.
+**
+** When the serialized [threading mode] is in use, it might be the
+** case that a second error occurs on a separate thread in between
+** the time of the first error and the call to these interfaces.
+** When that happens, the second error will be reported since these
+** interfaces always report the most recent result.  To avoid
+** this, each thread can obtain exclusive use of the [database connection] D
+** by invoking [sqlite3_mutex_enter]([sqlite3_db_mutex](D)) before beginning
+** to use D and invoking [sqlite3_mutex_leave]([sqlite3_db_mutex](D)) after
+** all calls to the interfaces listed here are completed.
+**
+** If an interface fails with SQLITE_MISUSE, that means the interface
+** was invoked incorrectly by the application.  In that case, the
+** error code and message may or may not be set.
+*/
+int sqlite3_errcode(sqlite3* db);
+int sqlite3_extended_errcode(sqlite3* db);
+const(char)* sqlite3_errmsg(sqlite3*);
+const(void)* sqlite3_errmsg16(sqlite3*);
+const(char)* sqlite3_errstr(int);
+
+/*
+** CAPI3REF: Prepared Statement Object
+** KEYWORDS: {prepared statement} {prepared statements}
+**
+** An instance of this object represents a single SQL statement that
+** has been compiled into binary form and is ready to be evaluated.
+**
+** Think of each SQL statement as a separate computer program.  The
+** original SQL text is source code.  A prepared statement object
+** is the compiled object code.  All SQL must be converted into a
+** prepared statement before it can be run.
+**
+** The life-cycle of a prepared statement object usually goes like this:
+**
+** <ol>
+** <li> Create the prepared statement object using [sqlite3_prepare_v2()].
+** <li> Bind values to [parameters] using the sqlite3_bind_*()
+**      interfaces.
+** <li> Run the SQL by calling [sqlite3_step()] one or more times.
+** <li> Reset the prepared statement using [sqlite3_reset()] then go back
+**      to step 2.  Do this zero or more times.
+** <li> Destroy the object using [sqlite3_finalize()].
+** </ol>
+*/
+struct sqlite3_stmt;
+
+/*
+** CAPI3REF: Run-time Limits
+** METHOD: sqlite3
+**
+** ^(This interface allows the size of various constructs to be limited
+** on a connection by connection basis.  The first parameter is the
+** [database connection] whose limit is to be set or queried.  The
+** second parameter is one of the [limit categories] that define a
+** class of constructs to be size limited.  The third parameter is the
+** new limit for that construct.)^
+**
+** ^If the new limit is a negative number, the limit is unchanged.
+** ^(For each limit category SQLITE_LIMIT_<i>NAME</i> there is a
+** [limits | hard upper bound]
+** set at compile-time by a C preprocessor macro called
+** [limits | SQLITE_MAX_<i>NAME</i>].
+** (The "_LIMIT_" in the name is changed to "_MAX_".))^
+** ^Attempts to increase a limit above its hard upper bound are
+** silently truncated to the hard upper bound.
+**
+** ^Regardless of whether or not the limit was changed, the
+** [sqlite3_limit()] interface returns the prior value of the limit.
+** ^Hence, to find the current value of a limit without changing it,
+** simply invoke this interface with the third parameter set to -1.
+**
+** Run-time limits are intended for use in applications that manage
+** both their own internal database and also databases that are controlled
+** by untrusted external sources.  An example application might be a
+** web browser that has its own databases for storing history and
+** separate databases controlled by JavaScript applications downloaded
+** off the Internet.  The internal databases can be given the
+** large, default limits.  Databases managed by external sources can
+** be given much smaller limits designed to prevent a denial of service
+** attack.  Developers might also want to use the [sqlite3_set_authorizer()]
+** interface to further control untrusted SQL.  The size of the database
+** created by an untrusted script can be contained using the
+** [max_page_count] [PRAGMA].
+**
+** New run-time limit categories may be added in future releases.
+*/
+int sqlite3_limit(sqlite3*, int id, int newVal);
+
+/*
+** CAPI3REF: Run-Time Limit Categories
+** KEYWORDS: {limit category} {*limit categories}
+**
+** These constants define various performance limits
+** that can be lowered at run-time using [sqlite3_limit()].
+** The synopsis of the meanings of the various limits is shown below.
+** Additional information is available at [limits | Limits in SQLite].
+**
+** <dl>
+** [[SQLITE_LIMIT_LENGTH]] ^(<dt>SQLITE_LIMIT_LENGTH</dt>
+** <dd>The maximum size of any string or BLOB or table row, in bytes.<dd>)^
+**
+** [[SQLITE_LIMIT_SQL_LENGTH]] ^(<dt>SQLITE_LIMIT_SQL_LENGTH</dt>
+** <dd>The maximum length of an SQL statement, in bytes.</dd>)^
+**
+** [[SQLITE_LIMIT_COLUMN]] ^(<dt>SQLITE_LIMIT_COLUMN</dt>
+** <dd>The maximum number of columns in a table definition or in the
+** result set of a [SELECT] or the maximum number of columns in an index
+** or in an ORDER BY or GROUP BY clause.</dd>)^
+**
+** [[SQLITE_LIMIT_EXPR_DEPTH]] ^(<dt>SQLITE_LIMIT_EXPR_DEPTH</dt>
+** <dd>The maximum depth of the parse tree on any expression.</dd>)^
+**
+** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt>
+** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^
+**
+** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt>
+** <dd>The maximum number of instructions in a virtual machine program
+** used to implement an SQL statement.  If [sqlite3_prepare_v2()] or
+** the equivalent tries to allocate space for more than this many opcodes
+** in a single prepared statement, an SQLITE_NOMEM error is returned.</dd>)^
+**
+** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt>
+** <dd>The maximum number of arguments on a function.</dd>)^
+**
+** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt>
+** <dd>The maximum number of [ATTACH | attached databases].)^</dd>
+**
+** [[SQLITE_LIMIT_LIKE_PATTERN_LENGTH]]
+** ^(<dt>SQLITE_LIMIT_LIKE_PATTERN_LENGTH</dt>
+** <dd>The maximum length of the pattern argument to the [LIKE] or
+** [GLOB] operators.</dd>)^
+**
+** [[SQLITE_LIMIT_VARIABLE_NUMBER]]
+** ^(<dt>SQLITE_LIMIT_VARIABLE_NUMBER</dt>
+** <dd>The maximum index number of any [parameter] in an SQL statement.)^
+**
+** [[SQLITE_LIMIT_TRIGGER_DEPTH]] ^(<dt>SQLITE_LIMIT_TRIGGER_DEPTH</dt>
+** <dd>The maximum depth of recursion for triggers.</dd>)^
+**
+** [[SQLITE_LIMIT_WORKER_THREADS]] ^(<dt>SQLITE_LIMIT_WORKER_THREADS</dt>
+** <dd>The maximum number of auxiliary worker threads that a single
+** [prepared statement] may start.</dd>)^
+** </dl>
+*/
+enum SQLITE_LIMIT_LENGTH = 0;
+enum SQLITE_LIMIT_SQL_LENGTH = 1;
+enum SQLITE_LIMIT_COLUMN = 2;
+enum SQLITE_LIMIT_EXPR_DEPTH = 3;
+enum SQLITE_LIMIT_COMPOUND_SELECT = 4;
+enum SQLITE_LIMIT_VDBE_OP = 5;
+enum SQLITE_LIMIT_FUNCTION_ARG = 6;
+enum SQLITE_LIMIT_ATTACHED = 7;
+enum SQLITE_LIMIT_LIKE_PATTERN_LENGTH = 8;
+enum SQLITE_LIMIT_VARIABLE_NUMBER = 9;
+enum SQLITE_LIMIT_TRIGGER_DEPTH = 10;
+enum SQLITE_LIMIT_WORKER_THREADS = 11;
+
+/*
+** CAPI3REF: Prepare Flags
+**
+** These constants define various flags that can be passed into
+** "prepFlags" parameter of the [sqlite3_prepare_v3()] and
+** [sqlite3_prepare16_v3()] interfaces.
+**
+** New flags may be added in future releases of SQLite.
+**
+** <dl>
+** [[SQLITE_PREPARE_PERSISTENT]] ^(<dt>SQLITE_PREPARE_PERSISTENT</dt>
+** <dd>The SQLITE_PREPARE_PERSISTENT flag is a hint to the query planner
+** that the prepared statement will be retained for a long time and
+** probably reused many times.)^ ^Without this flag, [sqlite3_prepare_v3()]
+** and [sqlite3_prepare16_v3()] assume that the prepared statement will
+** be used just once or at most a few times and then destroyed using
+** [sqlite3_finalize()] relatively soon. The current implementation acts
+** on this hint by avoiding the use of [lookaside memory] so as not to
+** deplete the limited store of lookaside memory. Future versions of
+** SQLite may act on this hint differently.
+** </dl>
+*/
+enum SQLITE_PREPARE_PERSISTENT = 0x01;
+
+/*
+** CAPI3REF: Compiling An SQL Statement
+** KEYWORDS: {SQL statement compiler}
+** METHOD: sqlite3
+** CONSTRUCTOR: sqlite3_stmt
+**
+** To execute an SQL statement, it must first be compiled into a byte-code
+** program using one of these routines.  Or, in other words, these routines
+** are constructors for the [prepared statement] object.
+**
+** The preferred routine to use is [sqlite3_prepare_v2()].  The
+** [sqlite3_prepare()] interface is legacy and should be avoided.
+** [sqlite3_prepare_v3()] has an extra "prepFlags" option that is used
+** for special purposes.
+**
+** The use of the UTF-8 interfaces is preferred, as SQLite currently
+** does all parsing using UTF-8.  The UTF-16 interfaces are provided
+** as a convenience.  The UTF-16 interfaces work by converting the
+** input text into UTF-8, then invoking the corresponding UTF-8 interface.
+**
+** The first argument, "db", is a [database connection] obtained from a
+** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
+** [sqlite3_open16()].  The database connection must not have been closed.
+**
+** The second argument, "zSql", is the statement to be compiled, encoded
+** as either UTF-8 or UTF-16.  The sqlite3_prepare(), sqlite3_prepare_v2(),
+** and sqlite3_prepare_v3()
+** interfaces use UTF-8, and sqlite3_prepare16(), sqlite3_prepare16_v2(),
+** and sqlite3_prepare16_v3() use UTF-16.
+**
+** ^If the nByte argument is negative, then zSql is read up to the
+** first zero terminator. ^If nByte is positive, then it is the
+** number of bytes read from zSql.  ^If nByte is zero, then no prepared
+** statement is generated.
+** If the caller knows that the supplied string is nul-terminated, then
+** there is a small performance advantage to passing an nByte parameter that
+** is the number of bytes in the input string <i>including</i>
+** the nul-terminator.
+**
+** ^If pzTail is not NULL then *pzTail is made to point to the first byte
+** past the end of the first SQL statement in zSql.  These routines only
+** compile the first statement in zSql, so *pzTail is left pointing to
+** what remains uncompiled.
+**
+** ^*ppStmt is left pointing to a compiled [prepared statement] that can be
+** executed using [sqlite3_step()].  ^If there is an error, *ppStmt is set
+** to NULL.  ^If the input text contains no SQL (if the input is an empty
+** string or a comment) then *ppStmt is set to NULL.
+** The calling procedure is responsible for deleting the compiled
+** SQL statement using [sqlite3_finalize()] after it has finished with it.
+** ppStmt may not be NULL.
+**
+** ^On success, the sqlite3_prepare() family of routines return [SQLITE_OK];
+** otherwise an [error code] is returned.
+**
+** The sqlite3_prepare_v2(), sqlite3_prepare_v3(), sqlite3_prepare16_v2(),
+** and sqlite3_prepare16_v3() interfaces are recommended for all new programs.
+** The older interfaces (sqlite3_prepare() and sqlite3_prepare16())
+** are retained for backwards compatibility, but their use is discouraged.
+** ^In the "vX" interfaces, the prepared statement
+** that is returned (the [sqlite3_stmt] object) contains a copy of the
+** original SQL text. This causes the [sqlite3_step()] interface to
+** behave differently in three ways:
+**
+** <ol>
+** <li>
+** ^If the database schema changes, instead of returning [SQLITE_SCHEMA] as it
+** always used to do, [sqlite3_step()] will automatically recompile the SQL
+** statement and try to run it again. As many as [SQLITE_MAX_SCHEMA_RETRY]
+** retries will occur before sqlite3_step() gives up and returns an error.
+** </li>
+**
+** <li>
+** ^When an error occurs, [sqlite3_step()] will return one of the detailed
+** [error codes] or [extended error codes].  ^The legacy behavior was that
+** [sqlite3_step()] would only return a generic [SQLITE_ERROR] result code
+** and the application would have to make a second call to [sqlite3_reset()]
+** in order to find the underlying cause of the problem. With the "v2" prepare
+** interfaces, the underlying reason for the error is returned immediately.
+** </li>
+**
+** <li>
+** ^If the specific value bound to [parameter | host parameter] in the
+** WHERE clause might influence the choice of query plan for a statement,
+** then the statement will be automatically recompiled, as if there had been
+** a schema change, on the first  [sqlite3_step()] call following any change
+** to the [sqlite3_bind_text | bindings] of that [parameter].
+** ^The specific value of WHERE-clause [parameter] might influence the
+** choice of query plan if the parameter is the left-hand side of a [LIKE]
+** or [GLOB] operator or if the parameter is compared to an indexed column
+** and the [SQLITE_ENABLE_STAT3] compile-time option is enabled.
+** </li>
+** </ol>
+**
+** <p>^sqlite3_prepare_v3() differs from sqlite3_prepare_v2() only in having
+** the extra prepFlags parameter, which is a bit array consisting of zero or
+** more of the [SQLITE_PREPARE_PERSISTENT|SQLITE_PREPARE_*] flags.  ^The
+** sqlite3_prepare_v2() interface works exactly the same as
+** sqlite3_prepare_v3() with a zero prepFlags parameter.
+*/
+/* Database handle */
+/* SQL statement, UTF-8 encoded */
+/* Maximum length of zSql in bytes. */
+/* OUT: Statement handle */
+/* OUT: Pointer to unused portion of zSql */
+int sqlite3_prepare(
+    sqlite3* db,
+    const(char)* zSql,
+    int nByte,
+    sqlite3_stmt** ppStmt,
+    const(char*)* pzTail);
+
+/* Database handle */
+/* SQL statement, UTF-8 encoded */
+/* Maximum length of zSql in bytes. */
+/* OUT: Statement handle */
+/* OUT: Pointer to unused portion of zSql */
+int sqlite3_prepare_v2(
+    sqlite3* db,
+    const(char)* zSql,
+    int nByte,
+    sqlite3_stmt** ppStmt,
+    const(char*)* pzTail);
+
+/* Database handle */
+/* SQL statement, UTF-8 encoded */
+/* Maximum length of zSql in bytes. */
+/* Zero or more SQLITE_PREPARE_ flags */
+/* OUT: Statement handle */
+/* OUT: Pointer to unused portion of zSql */
+int sqlite3_prepare_v3(
+    sqlite3* db,
+    const(char)* zSql,
+    int nByte,
+    uint prepFlags,
+    sqlite3_stmt** ppStmt,
+    const(char*)* pzTail);
+
+/* Database handle */
+/* SQL statement, UTF-16 encoded */
+/* Maximum length of zSql in bytes. */
+/* OUT: Statement handle */
+/* OUT: Pointer to unused portion of zSql */
+int sqlite3_prepare16(
+    sqlite3* db,
+    const(void)* zSql,
+    int nByte,
+    sqlite3_stmt** ppStmt,
+    const(void*)* pzTail);
+
+/* Database handle */
+/* SQL statement, UTF-16 encoded */
+/* Maximum length of zSql in bytes. */
+/* OUT: Statement handle */
+/* OUT: Pointer to unused portion of zSql */
+int sqlite3_prepare16_v2(
+    sqlite3* db,
+    const(void)* zSql,
+    int nByte,
+    sqlite3_stmt** ppStmt,
+    const(void*)* pzTail);
+
+/* Database handle */
+/* SQL statement, UTF-16 encoded */
+/* Maximum length of zSql in bytes. */
+/* Zero or more SQLITE_PREPARE_ flags */
+/* OUT: Statement handle */
+/* OUT: Pointer to unused portion of zSql */
+int sqlite3_prepare16_v3(
+    sqlite3* db,
+    const(void)* zSql,
+    int nByte,
+    uint prepFlags,
+    sqlite3_stmt** ppStmt,
+    const(void*)* pzTail);
+
+/*
+** CAPI3REF: Retrieving Statement SQL
+** METHOD: sqlite3_stmt
+**
+** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
+** SQL text used to create [prepared statement] P if P was
+** created by [sqlite3_prepare_v2()], [sqlite3_prepare_v3()],
+** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
+** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
+** string containing the SQL text of prepared statement P with
+** [bound parameters] expanded.
+**
+** ^(For example, if a prepared statement is created using the SQL
+** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
+** and parameter :xyz is unbound, then sqlite3_sql() will return
+** the original string, "SELECT $abc,:xyz" but sqlite3_expanded_sql()
+** will return "SELECT 2345,NULL".)^
+**
+** ^The sqlite3_expanded_sql() interface returns NULL if insufficient memory
+** is available to hold the result, or if the result would exceed the
+** the maximum string length determined by the [SQLITE_LIMIT_LENGTH].
+**
+** ^The [SQLITE_TRACE_SIZE_LIMIT] compile-time option limits the size of
+** bound parameter expansions.  ^The [SQLITE_OMIT_TRACE] compile-time
+** option causes sqlite3_expanded_sql() to always return NULL.
+**
+** ^The string returned by sqlite3_sql(P) is managed by SQLite and is
+** automatically freed when the prepared statement is finalized.
+** ^The string returned by sqlite3_expanded_sql(P), on the other hand,
+** is obtained from [sqlite3_malloc()] and must be free by the application
+** by passing it to [sqlite3_free()].
+*/
+const(char)* sqlite3_sql(sqlite3_stmt* pStmt);
+char* sqlite3_expanded_sql(sqlite3_stmt* pStmt);
+
+/*
+** CAPI3REF: Determine If An SQL Statement Writes The Database
+** METHOD: sqlite3_stmt
+**
+** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
+** and only if the [prepared statement] X makes no direct changes to
+** the content of the database file.
+**
+** Note that [application-defined SQL functions] or
+** [virtual tables] might change the database indirectly as a side effect.
+** ^(For example, if an application defines a function "eval()" that
+** calls [sqlite3_exec()], then the following SQL statement would
+** change the database file through side-effects:
+**
+** <blockquote><pre>
+**    SELECT eval('DELETE FROM t1') FROM t2;
+** </pre></blockquote>
+**
+** But because the [SELECT] statement does not change the database file
+** directly, sqlite3_stmt_readonly() would still return true.)^
+**
+** ^Transaction control statements such as [BEGIN], [COMMIT], [ROLLBACK],
+** [SAVEPOINT], and [RELEASE] cause sqlite3_stmt_readonly() to return true,
+** since the statements themselves do not actually modify the database but
+** rather they control the timing of when other statements modify the
+** database.  ^The [ATTACH] and [DETACH] statements also cause
+** sqlite3_stmt_readonly() to return true since, while those statements
+** change the configuration of a database connection, they do not make
+** changes to the content of the database files on disk.
+** ^The sqlite3_stmt_readonly() interface returns true for [BEGIN] since
+** [BEGIN] merely sets internal flags, but the [BEGIN|BEGIN IMMEDIATE] and
+** [BEGIN|BEGIN EXCLUSIVE] commands do touch the database and so
+** sqlite3_stmt_readonly() returns false for those commands.
+*/
+int sqlite3_stmt_readonly(sqlite3_stmt* pStmt);
+
+/*
+** CAPI3REF: Determine If A Prepared Statement Has Been Reset
+** METHOD: sqlite3_stmt
+**
+** ^The sqlite3_stmt_busy(S) interface returns true (non-zero) if the
+** [prepared statement] S has been stepped at least once using
+** [sqlite3_step(S)] but has neither run to completion (returned
+** [SQLITE_DONE] from [sqlite3_step(S)]) nor
+** been reset using [sqlite3_reset(S)].  ^The sqlite3_stmt_busy(S)
+** interface returns false if S is a NULL pointer.  If S is not a
+** NULL pointer and is not a pointer to a valid [prepared statement]
+** object, then the behavior is undefined and probably undesirable.
+**
+** This interface can be used in combination [sqlite3_next_stmt()]
+** to locate all prepared statements associated with a database
+** connection that are in need of being reset.  This can be used,
+** for example, in diagnostic routines to search for prepared
+** statements that are holding a transaction open.
+*/
+int sqlite3_stmt_busy(sqlite3_stmt*);
+
+/*
+** CAPI3REF: Dynamically Typed Value Object
+** KEYWORDS: {protected sqlite3_value} {unprotected sqlite3_value}
+**
+** SQLite uses the sqlite3_value object to represent all values
+** that can be stored in a database table. SQLite uses dynamic typing
+** for the values it stores.  ^Values stored in sqlite3_value objects
+** can be integers, floating point values, strings, BLOBs, or NULL.
+**
+** An sqlite3_value object may be either "protected" or "unprotected".
+** Some interfaces require a protected sqlite3_value.  Other interfaces
+** will accept either a protected or an unprotected sqlite3_value.
+** Every interface that accepts sqlite3_value arguments specifies
+** whether or not it requires a protected sqlite3_value.  The
+** [sqlite3_value_dup()] interface can be used to construct a new
+** protected sqlite3_value from an unprotected sqlite3_value.
+**
+** The terms "protected" and "unprotected" refer to whether or not
+** a mutex is held.  An internal mutex is held for a protected
+** sqlite3_value object but no mutex is held for an unprotected
+** sqlite3_value object.  If SQLite is compiled to be single-threaded
+** (with [SQLITE_THREADSAFE=0] and with [sqlite3_threadsafe()] returning 0)
+** or if SQLite is run in one of reduced mutex modes
+** [SQLITE_CONFIG_SINGLETHREAD] or [SQLITE_CONFIG_MULTITHREAD]
+** then there is no distinction between protected and unprotected
+** sqlite3_value objects and they can be used interchangeably.  However,
+** for maximum code portability it is recommended that applications
+** still make the distinction between protected and unprotected
+** sqlite3_value objects even when not strictly required.
+**
+** ^The sqlite3_value objects that are passed as parameters into the
+** implementation of [application-defined SQL functions] are protected.
+** ^The sqlite3_value object returned by
+** [sqlite3_column_value()] is unprotected.
+** Unprotected sqlite3_value objects may only be used as arguments
+** to [sqlite3_result_value()], [sqlite3_bind_value()], and
+** [sqlite3_value_dup()].
+** The [sqlite3_value_blob | sqlite3_value_type()] family of
+** interfaces require protected sqlite3_value objects.
+*/
+struct sqlite3_value;
+
+/*
+** CAPI3REF: SQL Function Context Object
+**
+** The context in which an SQL function executes is stored in an
+** sqlite3_context object.  ^A pointer to an sqlite3_context object
+** is always first parameter to [application-defined SQL functions].
+** The application-defined SQL function implementation will pass this
+** pointer through into calls to [sqlite3_result_int | sqlite3_result()],
+** [sqlite3_aggregate_context()], [sqlite3_user_data()],
+** [sqlite3_context_db_handle()], [sqlite3_get_auxdata()],
+** and/or [sqlite3_set_auxdata()].
+*/
+struct sqlite3_context;
+
+/*
+** CAPI3REF: Binding Values To Prepared Statements
+** KEYWORDS: {host parameter} {host parameters} {host parameter name}
+** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
+** METHOD: sqlite3_stmt
+**
+** ^(In the SQL statement text input to [sqlite3_prepare_v2()] and its variants,
+** literals may be replaced by a [parameter] that matches one of following
+** templates:
+**
+** <ul>
+** <li>  ?
+** <li>  ?NNN
+** <li>  :VVV
+** <li>  @VVV
+** <li>  $VVV
+** </ul>
+**
+** In the templates above, NNN represents an integer literal,
+** and VVV represents an alphanumeric identifier.)^  ^The values of these
+** parameters (also called "host parameter names" or "SQL parameters")
+** can be set using the sqlite3_bind_*() routines defined here.
+**
+** ^The first argument to the sqlite3_bind_*() routines is always
+** a pointer to the [sqlite3_stmt] object returned from
+** [sqlite3_prepare_v2()] or its variants.
+**
+** ^The second argument is the index of the SQL parameter to be set.
+** ^The leftmost SQL parameter has an index of 1.  ^When the same named
+** SQL parameter is used more than once, second and subsequent
+** occurrences have the same index as the first occurrence.
+** ^The index for named parameters can be looked up using the
+** [sqlite3_bind_parameter_index()] API if desired.  ^The index
+** for "?NNN" parameters is the value of NNN.
+** ^The NNN value must be between 1 and the [sqlite3_limit()]
+** parameter [SQLITE_LIMIT_VARIABLE_NUMBER] (default value: 999).
+**
+** ^The third argument is the value to bind to the parameter.
+** ^If the third parameter to sqlite3_bind_text() or sqlite3_bind_text16()
+** or sqlite3_bind_blob() is a NULL pointer then the fourth parameter
+** is ignored and the end result is the same as sqlite3_bind_null().
+**
+** ^(In those routines that have a fourth argument, its value is the
+** number of bytes in the parameter.  To be clear: the value is the
+** number of <u>bytes</u> in the value, not the number of characters.)^
+** ^If the fourth parameter to sqlite3_bind_text() or sqlite3_bind_text16()
+** is negative, then the length of the string is
+** the number of bytes up to the first zero terminator.
+** If the fourth parameter to sqlite3_bind_blob() is negative, then
+** the behavior is undefined.
+** If a non-negative fourth parameter is provided to sqlite3_bind_text()
+** or sqlite3_bind_text16() or sqlite3_bind_text64() then
+** that parameter must be the byte offset
+** where the NUL terminator would occur assuming the string were NUL
+** terminated.  If any NUL characters occur at byte offsets less than
+** the value of the fourth parameter then the resulting string value will
+** contain embedded NULs.  The result of expressions involving strings
+** with embedded NULs is undefined.
+**
+** ^The fifth argument to the BLOB and string binding interfaces
+** is a destructor used to dispose of the BLOB or
+** string after SQLite has finished with it.  ^The destructor is called
+** to dispose of the BLOB or string even if the call to bind API fails.
+** ^If the fifth argument is
+** the special value [SQLITE_STATIC], then SQLite assumes that the
+** information is in static, unmanaged space and does not need to be freed.
+** ^If the fifth argument has the value [SQLITE_TRANSIENT], then
+** SQLite makes its own private copy of the data immediately, before
+** the sqlite3_bind_*() routine returns.
+**
+** ^The sixth argument to sqlite3_bind_text64() must be one of
+** [SQLITE_UTF8], [SQLITE_UTF16], [SQLITE_UTF16BE], or [SQLITE_UTF16LE]
+** to specify the encoding of the text in the third parameter.  If
+** the sixth argument to sqlite3_bind_text64() is not one of the
+** allowed values shown above, or if the text encoding is different
+** from the encoding specified by the sixth parameter, then the behavior
+** is undefined.
+**
+** ^The sqlite3_bind_zeroblob() routine binds a BLOB of length N that
+** is filled with zeroes.  ^A zeroblob uses a fixed amount of memory
+** (just an integer to hold its size) while it is being processed.
+** Zeroblobs are intended to serve as placeholders for BLOBs whose
+** content is later written using
+** [sqlite3_blob_open | incremental BLOB I/O] routines.
+** ^A negative value for the zeroblob results in a zero-length BLOB.
+**
+** ^The sqlite3_bind_pointer(S,I,P,T,D) routine causes the I-th parameter in
+** [prepared statement] S to have an SQL value of NULL, but to also be
+** associated with the pointer P of type T.  ^D is either a NULL pointer or
+** a pointer to a destructor function for P. ^SQLite will invoke the
+** destructor D with a single argument of P when it is finished using
+** P.  The T parameter should be a static string, preferably a string
+** literal. The sqlite3_bind_pointer() routine is part of the
+** [pointer passing interface] added for SQLite 3.20.0.
+**
+** ^If any of the sqlite3_bind_*() routines are called with a NULL pointer
+** for the [prepared statement] or with a prepared statement for which
+** [sqlite3_step()] has been called more recently than [sqlite3_reset()],
+** then the call will return [SQLITE_MISUSE].  If any sqlite3_bind_()
+** routine is passed a [prepared statement] that has been finalized, the
+** result is undefined and probably harmful.
+**
+** ^Bindings are not cleared by the [sqlite3_reset()] routine.
+** ^Unbound parameters are interpreted as NULL.
+**
+** ^The sqlite3_bind_* routines return [SQLITE_OK] on success or an
+** [error code] if anything goes wrong.
+** ^[SQLITE_TOOBIG] might be returned if the size of a string or BLOB
+** exceeds limits imposed by [sqlite3_limit]([SQLITE_LIMIT_LENGTH]) or
+** [SQLITE_MAX_LENGTH].
+** ^[SQLITE_RANGE] is returned if the parameter
+** index is out of range.  ^[SQLITE_NOMEM] is returned if malloc() fails.
+**
+** See also: [sqlite3_bind_parameter_count()],
+** [sqlite3_bind_parameter_name()], and [sqlite3_bind_parameter_index()].
+*/
+int sqlite3_bind_blob(sqlite3_stmt*, int, const(void)*, int n, void function(void*));
+int sqlite3_bind_blob64(
+    sqlite3_stmt*,
+    int,
+    const(void)*,
+    sqlite3_uint64,
+    void function(void*));
+int sqlite3_bind_double(sqlite3_stmt*, int, double);
+int sqlite3_bind_int(sqlite3_stmt*, int, int);
+int sqlite3_bind_int64(sqlite3_stmt*, int, sqlite3_int64);
+int sqlite3_bind_null(sqlite3_stmt*, int);
+int sqlite3_bind_text(sqlite3_stmt*, int, const(char)*, int, void function(void*));
+int sqlite3_bind_text16(sqlite3_stmt*, int, const(void)*, int, void function(void*));
+int sqlite3_bind_text64(
+    sqlite3_stmt*,
+    int,
+    const(char)*,
+    sqlite3_uint64,
+    void function(void*),
+    ubyte encoding);
+int sqlite3_bind_value(sqlite3_stmt*, int, const(sqlite3_value)*);
+int sqlite3_bind_pointer(sqlite3_stmt*, int, void*, const(char)*, void function(void*));
+int sqlite3_bind_zeroblob(sqlite3_stmt*, int, int n);
+int sqlite3_bind_zeroblob64(sqlite3_stmt*, int, sqlite3_uint64);
+
+/*
+** CAPI3REF: Number Of SQL Parameters
+** METHOD: sqlite3_stmt
+**
+** ^This routine can be used to find the number of [SQL parameters]
+** in a [prepared statement].  SQL parameters are tokens of the
+** form "?", "?NNN", ":AAA", "$AAA", or "@AAA" that serve as
+** placeholders for values that are [sqlite3_bind_blob | bound]
+** to the parameters at a later time.
+**
+** ^(This routine actually returns the index of the largest (rightmost)
+** parameter. For all forms except ?NNN, this will correspond to the
+** number of unique parameters.  If parameters of the ?NNN form are used,
+** there may be gaps in the list.)^
+**
+** See also: [sqlite3_bind_blob|sqlite3_bind()],
+** [sqlite3_bind_parameter_name()], and
+** [sqlite3_bind_parameter_index()].
+*/
+int sqlite3_bind_parameter_count(sqlite3_stmt*);
+
+/*
+** CAPI3REF: Name Of A Host Parameter
+** METHOD: sqlite3_stmt
+**
+** ^The sqlite3_bind_parameter_name(P,N) interface returns
+** the name of the N-th [SQL parameter] in the [prepared statement] P.
+** ^(SQL parameters of the form "?NNN" or ":AAA" or "@AAA" or "$AAA"
+** have a name which is the string "?NNN" or ":AAA" or "@AAA" or "$AAA"
+** respectively.
+** In other words, the initial ":" or "$" or "@" or "?"
+** is included as part of the name.)^
+** ^Parameters of the form "?" without a following integer have no name
+** and are referred to as "nameless" or "anonymous parameters".
+**
+** ^The first host parameter has an index of 1, not 0.
+**
+** ^If the value N is out of range or if the N-th parameter is
+** nameless, then NULL is returned.  ^The returned string is
+** always in UTF-8 encoding even if the named parameter was
+** originally specified as UTF-16 in [sqlite3_prepare16()],
+** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
+**
+** See also: [sqlite3_bind_blob|sqlite3_bind()],
+** [sqlite3_bind_parameter_count()], and
+** [sqlite3_bind_parameter_index()].
+*/
+const(char)* sqlite3_bind_parameter_name(sqlite3_stmt*, int);
+
+/*
+** CAPI3REF: Index Of A Parameter With A Given Name
+** METHOD: sqlite3_stmt
+**
+** ^Return the index of an SQL parameter given its name.  ^The
+** index value returned is suitable for use as the second
+** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
+** is returned if no matching parameter is found.  ^The parameter
+** name must be given in UTF-8 even if the original statement
+** was prepared from UTF-16 text using [sqlite3_prepare16_v2()] or
+** [sqlite3_prepare16_v3()].
+**
+** See also: [sqlite3_bind_blob|sqlite3_bind()],
+** [sqlite3_bind_parameter_count()], and
+** [sqlite3_bind_parameter_name()].
+*/
+int sqlite3_bind_parameter_index(sqlite3_stmt*, const(char)* zName);
+
+/*
+** CAPI3REF: Reset All Bindings On A Prepared Statement
+** METHOD: sqlite3_stmt
+**
+** ^Contrary to the intuition of many, [sqlite3_reset()] does not reset
+** the [sqlite3_bind_blob | bindings] on a [prepared statement].
+** ^Use this routine to reset all host parameters to NULL.
+*/
+int sqlite3_clear_bindings(sqlite3_stmt*);
+
+/*
+** CAPI3REF: Number Of Columns In A Result Set
+** METHOD: sqlite3_stmt
+**
+** ^Return the number of columns in the result set returned by the
+** [prepared statement]. ^If this routine returns 0, that means the
+** [prepared statement] returns no data (for example an [UPDATE]).
+** ^However, just because this routine returns a positive number does not
+** mean that one or more rows of data will be returned.  ^A SELECT statement
+** will always have a positive sqlite3_column_count() but depending on the
+** WHERE clause constraints and the table content, it might return no rows.
+**
+** See also: [sqlite3_data_count()]
+*/
+int sqlite3_column_count(sqlite3_stmt* pStmt);
+
+/*
+** CAPI3REF: Column Names In A Result Set
+** METHOD: sqlite3_stmt
+**
+** ^These routines return the name assigned to a particular column
+** in the result set of a [SELECT] statement.  ^The sqlite3_column_name()
+** interface returns a pointer to a zero-terminated UTF-8 string
+** and sqlite3_column_name16() returns a pointer to a zero-terminated
+** UTF-16 string.  ^The first parameter is the [prepared statement]
+** that implements the [SELECT] statement. ^The second parameter is the
+** column number.  ^The leftmost column is number 0.
+**
+** ^The returned string pointer is valid until either the [prepared statement]
+** is destroyed by [sqlite3_finalize()] or until the statement is automatically
+** reprepared by the first call to [sqlite3_step()] for a particular run
+** or until the next call to
+** sqlite3_column_name() or sqlite3_column_name16() on the same column.
+**
+** ^If sqlite3_malloc() fails during the processing of either routine
+** (for example during a conversion from UTF-8 to UTF-16) then a
+** NULL pointer is returned.
+**
+** ^The name of a result column is the value of the "AS" clause for
+** that column, if there is an AS clause.  If there is no AS clause
+** then the name of the column is unspecified and may change from
+** one release of SQLite to the next.
+*/
+const(char)* sqlite3_column_name(sqlite3_stmt*, int N);
+const(void)* sqlite3_column_name16(sqlite3_stmt*, int N);
+
+/*
+** CAPI3REF: Source Of Data In A Query Result
+** METHOD: sqlite3_stmt
+**
+** ^These routines provide a means to determine the database, table, and
+** table column that is the origin of a particular result column in
+** [SELECT] statement.
+** ^The name of the database or table or column can be returned as
+** either a UTF-8 or UTF-16 string.  ^The _database_ routines return
+** the database name, the _table_ routines return the table name, and
+** the origin_ routines return the column name.
+** ^The returned string is valid until the [prepared statement] is destroyed
+** using [sqlite3_finalize()] or until the statement is automatically
+** reprepared by the first call to [sqlite3_step()] for a particular run
+** or until the same information is requested
+** again in a different encoding.
+**
+** ^The names returned are the original un-aliased names of the
+** database, table, and column.
+**
+** ^The first argument to these interfaces is a [prepared statement].
+** ^These functions return information about the Nth result column returned by
+** the statement, where N is the second function argument.
+** ^The left-most column is column 0 for these routines.
+**
+** ^If the Nth column returned by the statement is an expression or
+** subquery and is not a column value, then all of these functions return
+** NULL.  ^These routine might also return NULL if a memory allocation error
+** occurs.  ^Otherwise, they return the name of the attached database, table,
+** or column that query result column was extracted from.
+**
+** ^As with all other SQLite APIs, those whose names end with "16" return
+** UTF-16 encoded strings and the other functions return UTF-8.
+**
+** ^These APIs are only available if the library was compiled with the
+** [SQLITE_ENABLE_COLUMN_METADATA] C-preprocessor symbol.
+**
+** If two or more threads call one or more of these routines against the same
+** prepared statement and column at the same time then the results are
+** undefined.
+**
+** If two or more threads call one or more
+** [sqlite3_column_database_name | column metadata interfaces]
+** for the same [prepared statement] and result column
+** at the same time then the results are undefined.
+*/
+const(char)* sqlite3_column_database_name(sqlite3_stmt*, int);
+const(void)* sqlite3_column_database_name16(sqlite3_stmt*, int);
+const(char)* sqlite3_column_table_name(sqlite3_stmt*, int);
+const(void)* sqlite3_column_table_name16(sqlite3_stmt*, int);
+const(char)* sqlite3_column_origin_name(sqlite3_stmt*, int);
+const(void)* sqlite3_column_origin_name16(sqlite3_stmt*, int);
+
+/*
+** CAPI3REF: Declared Datatype Of A Query Result
+** METHOD: sqlite3_stmt
+**
+** ^(The first parameter is a [prepared statement].
+** If this statement is a [SELECT] statement and the Nth column of the
+** returned result set of that [SELECT] is a table column (not an
+** expression or subquery) then the declared type of the table
+** column is returned.)^  ^If the Nth column of the result set is an
+** expression or subquery, then a NULL pointer is returned.
+** ^The returned string is always UTF-8 encoded.
+**
+** ^(For example, given the database schema:
+**
+** CREATE TABLE t1(c1 VARIANT);
+**
+** and the following statement to be compiled:
+**
+** SELECT c1 + 1, c1 FROM t1;
+**
+** this routine would return the string "VARIANT" for the second result
+** column (i==1), and a NULL pointer for the first result column (i==0).)^
+**
+** ^SQLite uses dynamic run-time typing.  ^So just because a column
+** is declared to contain a particular type does not mean that the
+** data stored in that column is of the declared type.  SQLite is
+** strongly typed, but the typing is dynamic not static.  ^Type
+** is associated with individual values, not with the containers
+** used to hold those values.
+*/
+const(char)* sqlite3_column_decltype(sqlite3_stmt*, int);
+const(void)* sqlite3_column_decltype16(sqlite3_stmt*, int);
+
+/*
+** CAPI3REF: Evaluate An SQL Statement
+** METHOD: sqlite3_stmt
+**
+** After a [prepared statement] has been prepared using any of
+** [sqlite3_prepare_v2()], [sqlite3_prepare_v3()], [sqlite3_prepare16_v2()],
+** or [sqlite3_prepare16_v3()] or one of the legacy
+** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
+** must be called one or more times to evaluate the statement.
+**
+** The details of the behavior of the sqlite3_step() interface depend
+** on whether the statement was prepared using the newer "vX" interfaces
+** [sqlite3_prepare_v3()], [sqlite3_prepare_v2()], [sqlite3_prepare16_v3()],
+** [sqlite3_prepare16_v2()] or the older legacy
+** interfaces [sqlite3_prepare()] and [sqlite3_prepare16()].  The use of the
+** new "vX" interface is recommended for new applications but the legacy
+** interface will continue to be supported.
+**
+** ^In the legacy interface, the return value will be either [SQLITE_BUSY],
+** [SQLITE_DONE], [SQLITE_ROW], [SQLITE_ERROR], or [SQLITE_MISUSE].
+** ^With the "v2" interface, any of the other [result codes] or
+** [extended result codes] might be returned as well.
+**
+** ^[SQLITE_BUSY] means that the database engine was unable to acquire the
+** database locks it needs to do its job.  ^If the statement is a [COMMIT]
+** or occurs outside of an explicit transaction, then you can retry the
+** statement.  If the statement is not a [COMMIT] and occurs within an
+** explicit transaction then you should rollback the transaction before
+** continuing.
+**
+** ^[SQLITE_DONE] means that the statement has finished executing
+** successfully.  sqlite3_step() should not be called again on this virtual
+** machine without first calling [sqlite3_reset()] to reset the virtual
+** machine back to its initial state.
+**
+** ^If the SQL statement being executed returns any data, then [SQLITE_ROW]
+** is returned each time a new row of data is ready for processing by the
+** caller. The values may be accessed using the [column access functions].
+** sqlite3_step() is called again to retrieve the next row of data.
+**
+** ^[SQLITE_ERROR] means that a run-time error (such as a constraint
+** violation) has occurred.  sqlite3_step() should not be called again on
+** the VM. More information may be found by calling [sqlite3_errmsg()].
+** ^With the legacy interface, a more specific error code (for example,
+** [SQLITE_INTERRUPT], [SQLITE_SCHEMA], [SQLITE_CORRUPT], and so forth)
+** can be obtained by calling [sqlite3_reset()] on the
+** [prepared statement].  ^In the "v2" interface,
+** the more specific error code is returned directly by sqlite3_step().
+**
+** [SQLITE_MISUSE] means that the this routine was called inappropriately.
+** Perhaps it was called on a [prepared statement] that has
+** already been [sqlite3_finalize | finalized] or on one that had
+** previously returned [SQLITE_ERROR] or [SQLITE_DONE].  Or it could
+** be the case that the same database connection is being used by two or
+** more threads at the same moment in time.
+**
+** For all versions of SQLite up to and including 3.6.23.1, a call to
+** [sqlite3_reset()] was required after sqlite3_step() returned anything
+** other than [SQLITE_ROW] before any subsequent invocation of
+** sqlite3_step().  Failure to reset the prepared statement using
+** [sqlite3_reset()] would result in an [SQLITE_MISUSE] return from
+** sqlite3_step().  But after [version 3.6.23.1] ([dateof:3.6.23.1],
+** sqlite3_step() began
+** calling [sqlite3_reset()] automatically in this circumstance rather
+** than returning [SQLITE_MISUSE].  This is not considered a compatibility
+** break because any application that ever receives an SQLITE_MISUSE error
+** is broken by definition.  The [SQLITE_OMIT_AUTORESET] compile-time option
+** can be used to restore the legacy behavior.
+**
+** <b>Goofy Interface Alert:</b> In the legacy interface, the sqlite3_step()
+** API always returns a generic error code, [SQLITE_ERROR], following any
+** error other than [SQLITE_BUSY] and [SQLITE_MISUSE].  You must call
+** [sqlite3_reset()] or [sqlite3_finalize()] in order to find one of the
+** specific [error codes] that better describes the error.
+** We admit that this is a goofy design.  The problem has been fixed
+** with the "v2" interface.  If you prepare all of your SQL statements
+** using [sqlite3_prepare_v3()] or [sqlite3_prepare_v2()]
+** or [sqlite3_prepare16_v2()] or [sqlite3_prepare16_v3()] instead
+** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()] interfaces,
+** then the more specific [error codes] are returned directly
+** by sqlite3_step().  The use of the "vX" interfaces is recommended.
+*/
+int sqlite3_step(sqlite3_stmt*);
+
+/*
+** CAPI3REF: Number of columns in a result set
+** METHOD: sqlite3_stmt
+**
+** ^The sqlite3_data_count(P) interface returns the number of columns in the
+** current row of the result set of [prepared statement] P.
+** ^If prepared statement P does not have results ready to return
+** (via calls to the [sqlite3_column_int | sqlite3_column_*()] of
+** interfaces) then sqlite3_data_count(P) returns 0.
+** ^The sqlite3_data_count(P) routine also returns 0 if P is a NULL pointer.
+** ^The sqlite3_data_count(P) routine returns 0 if the previous call to
+** [sqlite3_step](P) returned [SQLITE_DONE].  ^The sqlite3_data_count(P)
+** will return non-zero if previous call to [sqlite3_step](P) returned
+** [SQLITE_ROW], except in the case of the [PRAGMA incremental_vacuum]
+** where it always returns zero since each step of that multi-step
+** pragma returns 0 columns of data.
+**
+** See also: [sqlite3_column_count()]
+*/
+int sqlite3_data_count(sqlite3_stmt* pStmt);
+
+/*
+** CAPI3REF: Fundamental Datatypes
+** KEYWORDS: SQLITE_TEXT
+**
+** ^(Every value in SQLite has one of five fundamental datatypes:
+**
+** <ul>
+** <li> 64-bit signed integer
+** <li> 64-bit IEEE floating point number
+** <li> string
+** <li> BLOB
+** <li> NULL
+** </ul>)^
+**
+** These constants are codes for each of those types.
+**
+** Note that the SQLITE_TEXT constant was also used in SQLite version 2
+** for a completely different meaning.  Software that links against both
+** SQLite version 2 and SQLite version 3 should use SQLITE3_TEXT, not
+** SQLITE_TEXT.
+*/
+enum SQLITE_INTEGER = 1;
+enum SQLITE_FLOAT = 2;
+enum SQLITE_BLOB = 4;
+enum SQLITE_NULL = 5;
+
+enum SQLITE_TEXT = 3;
+
+enum SQLITE3_TEXT = 3;
+
+/*
+** CAPI3REF: Result Values From A Query
+** KEYWORDS: {column access functions}
+** METHOD: sqlite3_stmt
+**
+** <b>Summary:</b>
+** <blockquote><table border=0 cellpadding=0 cellspacing=0>
+** <tr><td><b>sqlite3_column_blob</b><td>&rarr;<td>BLOB result
+** <tr><td><b>sqlite3_column_double</b><td>&rarr;<td>REAL result
+** <tr><td><b>sqlite3_column_int</b><td>&rarr;<td>32-bit INTEGER result
+** <tr><td><b>sqlite3_column_int64</b><td>&rarr;<td>64-bit INTEGER result
+** <tr><td><b>sqlite3_column_text</b><td>&rarr;<td>UTF-8 TEXT result
+** <tr><td><b>sqlite3_column_text16</b><td>&rarr;<td>UTF-16 TEXT result
+** <tr><td><b>sqlite3_column_value</b><td>&rarr;<td>The result as an
+** [sqlite3_value|unprotected sqlite3_value] object.
+** <tr><td>&nbsp;<td>&nbsp;<td>&nbsp;
+** <tr><td><b>sqlite3_column_bytes</b><td>&rarr;<td>Size of a BLOB
+** or a UTF-8 TEXT result in bytes
+** <tr><td><b>sqlite3_column_bytes16&nbsp;&nbsp;</b>
+** <td>&rarr;&nbsp;&nbsp;<td>Size of UTF-16
+** TEXT in bytes
+** <tr><td><b>sqlite3_column_type</b><td>&rarr;<td>Default
+** datatype of the result
+** </table></blockquote>
+**
+** <b>Details:</b>
+**
+** ^These routines return information about a single column of the current
+** result row of a query.  ^In every case the first argument is a pointer
+** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
+** that was returned from [sqlite3_prepare_v2()] or one of its variants)
+** and the second argument is the index of the column for which information
+** should be returned. ^The leftmost column of the result set has the index 0.
+** ^The number of columns in the result can be determined using
+** [sqlite3_column_count()].
+**
+** If the SQL statement does not currently point to a valid row, or if the
+** column index is out of range, the result is undefined.
+** These routines may only be called when the most recent call to
+** [sqlite3_step()] has returned [SQLITE_ROW] and neither
+** [sqlite3_reset()] nor [sqlite3_finalize()] have been called subsequently.
+** If any of these routines are called after [sqlite3_reset()] or
+** [sqlite3_finalize()] or after [sqlite3_step()] has returned
+** something other than [SQLITE_ROW], the results are undefined.
+** If [sqlite3_step()] or [sqlite3_reset()] or [sqlite3_finalize()]
+** are called from a different thread while any of these routines
+** are pending, then the results are undefined.
+**
+** The first six interfaces (_blob, _double, _int, _int64, _text, and _text16)
+** each return the value of a result column in a specific data format.  If
+** the result column is not initially in the requested format (for example,
+** if the query returns an integer but the sqlite3_column_text() interface
+** is used to extract the value) then an automatic type conversion is performed.
+**
+** ^The sqlite3_column_type() routine returns the
+** [SQLITE_INTEGER | datatype code] for the initial data type
+** of the result column.  ^The returned value is one of [SQLITE_INTEGER],
+** [SQLITE_FLOAT], [SQLITE_TEXT], [SQLITE_BLOB], or [SQLITE_NULL].
+** The return value of sqlite3_column_type() can be used to decide which
+** of the first six interface should be used to extract the column value.
+** The value returned by sqlite3_column_type() is only meaningful if no
+** automatic type conversions have occurred for the value in question.
+** After a type conversion, the result of calling sqlite3_column_type()
+** is undefined, though harmless.  Future
+** versions of SQLite may change the behavior of sqlite3_column_type()
+** following a type conversion.
+**
+** If the result is a BLOB or a TEXT string, then the sqlite3_column_bytes()
+** or sqlite3_column_bytes16() interfaces can be used to determine the size
+** of that BLOB or string.
+**
+** ^If the result is a BLOB or UTF-8 string then the sqlite3_column_bytes()
+** routine returns the number of bytes in that BLOB or string.
+** ^If the result is a UTF-16 string, then sqlite3_column_bytes() converts
+** the string to UTF-8 and then returns the number of bytes.
+** ^If the result is a numeric value then sqlite3_column_bytes() uses
+** [sqlite3_snprintf()] to convert that value to a UTF-8 string and returns
+** the number of bytes in that string.
+** ^If the result is NULL, then sqlite3_column_bytes() returns zero.
+**
+** ^If the result is a BLOB or UTF-16 string then the sqlite3_column_bytes16()
+** routine returns the number of bytes in that BLOB or string.
+** ^If the result is a UTF-8 string, then sqlite3_column_bytes16() converts
+** the string to UTF-16 and then returns the number of bytes.
+** ^If the result is a numeric value then sqlite3_column_bytes16() uses
+** [sqlite3_snprintf()] to convert that value to a UTF-16 string and returns
+** the number of bytes in that string.
+** ^If the result is NULL, then sqlite3_column_bytes16() returns zero.
+**
+** ^The values returned by [sqlite3_column_bytes()] and
+** [sqlite3_column_bytes16()] do not include the zero terminators at the end
+** of the string.  ^For clarity: the values returned by
+** [sqlite3_column_bytes()] and [sqlite3_column_bytes16()] are the number of
+** bytes in the string, not the number of characters.
+**
+** ^Strings returned by sqlite3_column_text() and sqlite3_column_text16(),
+** even empty strings, are always zero-terminated.  ^The return
+** value from sqlite3_column_blob() for a zero-length BLOB is a NULL pointer.
+**
+** <b>Warning:</b> ^The object returned by [sqlite3_column_value()] is an
+** [unprotected sqlite3_value] object.  In a multithreaded environment,
+** an unprotected sqlite3_value object may only be used safely with
+** [sqlite3_bind_value()] and [sqlite3_result_value()].
+** If the [unprotected sqlite3_value] object returned by
+** [sqlite3_column_value()] is used in any other way, including calls
+** to routines like [sqlite3_value_int()], [sqlite3_value_text()],
+** or [sqlite3_value_bytes()], the behavior is not threadsafe.
+** Hence, the sqlite3_column_value() interface
+** is normally only useful within the implementation of
+** [application-defined SQL functions] or [virtual tables], not within
+** top-level application code.
+**
+** The these routines may attempt to convert the datatype of the result.
+** ^For example, if the internal representation is FLOAT and a text result
+** is requested, [sqlite3_snprintf()] is used internally to perform the
+** conversion automatically.  ^(The following table details the conversions
+** that are applied:
+**
+** <blockquote>
+** <table border="1">
+** <tr><th> Internal<br>Type <th> Requested<br>Type <th>  Conversion
+**
+** <tr><td>  NULL    <td> INTEGER   <td> Result is 0
+** <tr><td>  NULL    <td>  FLOAT    <td> Result is 0.0
+** <tr><td>  NULL    <td>   TEXT    <td> Result is a NULL pointer
+** <tr><td>  NULL    <td>   BLOB    <td> Result is a NULL pointer
+** <tr><td> INTEGER  <td>  FLOAT    <td> Convert from integer to float
+** <tr><td> INTEGER  <td>   TEXT    <td> ASCII rendering of the integer
+** <tr><td> INTEGER  <td>   BLOB    <td> Same as INTEGER->TEXT
+** <tr><td>  FLOAT   <td> INTEGER   <td> [CAST] to INTEGER
+** <tr><td>  FLOAT   <td>   TEXT    <td> ASCII rendering of the float
+** <tr><td>  FLOAT   <td>   BLOB    <td> [CAST] to BLOB
+** <tr><td>  TEXT    <td> INTEGER   <td> [CAST] to INTEGER
+** <tr><td>  TEXT    <td>  FLOAT    <td> [CAST] to REAL
+** <tr><td>  TEXT    <td>   BLOB    <td> No change
+** <tr><td>  BLOB    <td> INTEGER   <td> [CAST] to INTEGER
+** <tr><td>  BLOB    <td>  FLOAT    <td> [CAST] to REAL
+** <tr><td>  BLOB    <td>   TEXT    <td> Add a zero terminator if needed
+** </table>
+** </blockquote>)^
+**
+** Note that when type conversions occur, pointers returned by prior
+** calls to sqlite3_column_blob(), sqlite3_column_text(), and/or
+** sqlite3_column_text16() may be invalidated.
+** Type conversions and pointer invalidations might occur
+** in the following cases:
+**
+** <ul>
+** <li> The initial content is a BLOB and sqlite3_column_text() or
+**      sqlite3_column_text16() is called.  A zero-terminator might
+**      need to be added to the string.</li>
+** <li> The initial content is UTF-8 text and sqlite3_column_bytes16() or
+**      sqlite3_column_text16() is called.  The content must be converted
+**      to UTF-16.</li>
+** <li> The initial content is UTF-16 text and sqlite3_column_bytes() or
+**      sqlite3_column_text() is called.  The content must be converted
+**      to UTF-8.</li>
+** </ul>
+**
+** ^Conversions between UTF-16be and UTF-16le are always done in place and do
+** not invalidate a prior pointer, though of course the content of the buffer
+** that the prior pointer references will have been modified.  Other kinds
+** of conversion are done in place when it is possible, but sometimes they
+** are not possible and in those cases prior pointers are invalidated.
+**
+** The safest policy is to invoke these routines
+** in one of the following ways:
+**
+** <ul>
+**  <li>sqlite3_column_text() followed by sqlite3_column_bytes()</li>
+**  <li>sqlite3_column_blob() followed by sqlite3_column_bytes()</li>
+**  <li>sqlite3_column_text16() followed by sqlite3_column_bytes16()</li>
+** </ul>
+**
+** In other words, you should call sqlite3_column_text(),
+** sqlite3_column_blob(), or sqlite3_column_text16() first to force the result
+** into the desired format, then invoke sqlite3_column_bytes() or
+** sqlite3_column_bytes16() to find the size of the result.  Do not mix calls
+** to sqlite3_column_text() or sqlite3_column_blob() with calls to
+** sqlite3_column_bytes16(), and do not mix calls to sqlite3_column_text16()
+** with calls to sqlite3_column_bytes().
+**
+** ^The pointers returned are valid until a type conversion occurs as
+** described above, or until [sqlite3_step()] or [sqlite3_reset()] or
+** [sqlite3_finalize()] is called.  ^The memory space used to hold strings
+** and BLOBs is freed automatically.  Do not pass the pointers returned
+** from [sqlite3_column_blob()], [sqlite3_column_text()], etc. into
+** [sqlite3_free()].
+**
+** As long as the input parameters are correct, these routines will only
+** fail if an out-of-memory error occurs during a format conversion.
+** Only the following subset of interfaces are subject to out-of-memory
+** errors:
+**
+** <ul>
+** <li> sqlite3_column_blob()
+** <li> sqlite3_column_text()
+** <li> sqlite3_column_text16()
+** <li> sqlite3_column_bytes()
+** <li> sqlite3_column_bytes16()
+** </ul>
+**
+** If an out-of-memory error occurs, then the return value from these
+** routines is the same as if the column had contained an SQL NULL value.
+** Valid SQL NULL returns can be distinguished from out-of-memory errors
+** by invoking the [sqlite3_errcode()] immediately after the suspect
+** return value is obtained and before any
+** other SQLite interface is called on the same [database connection].
+*/
+const(void)* sqlite3_column_blob(sqlite3_stmt*, int iCol);
+double sqlite3_column_double(sqlite3_stmt*, int iCol);
+int sqlite3_column_int(sqlite3_stmt*, int iCol);
+sqlite3_int64 sqlite3_column_int64(sqlite3_stmt*, int iCol);
+const(ubyte)* sqlite3_column_text(sqlite3_stmt*, int iCol);
+const(void)* sqlite3_column_text16(sqlite3_stmt*, int iCol);
+sqlite3_value* sqlite3_column_value(sqlite3_stmt*, int iCol);
+int sqlite3_column_bytes(sqlite3_stmt*, int iCol);
+int sqlite3_column_bytes16(sqlite3_stmt*, int iCol);
+int sqlite3_column_type(sqlite3_stmt*, int iCol);
+
+/*
+** CAPI3REF: Destroy A Prepared Statement Object
+** DESTRUCTOR: sqlite3_stmt
+**
+** ^The sqlite3_finalize() function is called to delete a [prepared statement].
+** ^If the most recent evaluation of the statement encountered no errors
+** or if the statement is never been evaluated, then sqlite3_finalize() returns
+** SQLITE_OK.  ^If the most recent evaluation of statement S failed, then
+** sqlite3_finalize(S) returns the appropriate [error code] or
+** [extended error code].
+**
+** ^The sqlite3_finalize(S) routine can be called at any point during
+** the life cycle of [prepared statement] S:
+** before statement S is ever evaluated, after
+** one or more calls to [sqlite3_reset()], or after any call
+** to [sqlite3_step()] regardless of whether or not the statement has
+** completed execution.
+**
+** ^Invoking sqlite3_finalize() on a NULL pointer is a harmless no-op.
+**
+** The application must finalize every [prepared statement] in order to avoid
+** resource leaks.  It is a grievous error for the application to try to use
+** a prepared statement after it has been finalized.  Any use of a prepared
+** statement after it has been finalized can result in undefined and
+** undesirable behavior such as segfaults and heap corruption.
+*/
+int sqlite3_finalize(sqlite3_stmt* pStmt);
+
+/*
+** CAPI3REF: Reset A Prepared Statement Object
+** METHOD: sqlite3_stmt
+**
+** The sqlite3_reset() function is called to reset a [prepared statement]
+** object back to its initial state, ready to be re-executed.
+** ^Any SQL statement variables that had values bound to them using
+** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values.
+** Use [sqlite3_clear_bindings()] to reset the bindings.
+**
+** ^The [sqlite3_reset(S)] interface resets the [prepared statement] S
+** back to the beginning of its program.
+**
+** ^If the most recent call to [sqlite3_step(S)] for the
+** [prepared statement] S returned [SQLITE_ROW] or [SQLITE_DONE],
+** or if [sqlite3_step(S)] has never before been called on S,
+** then [sqlite3_reset(S)] returns [SQLITE_OK].
+**
+** ^If the most recent call to [sqlite3_step(S)] for the
+** [prepared statement] S indicated an error, then
+** [sqlite3_reset(S)] returns an appropriate [error code].
+**
+** ^The [sqlite3_reset(S)] interface does not change the values
+** of any [sqlite3_bind_blob|bindings] on the [prepared statement] S.
+*/
+int sqlite3_reset(sqlite3_stmt* pStmt);
+
+/*
+** CAPI3REF: Create Or Redefine SQL Functions
+** KEYWORDS: {function creation routines}
+** KEYWORDS: {application-defined SQL function}
+** KEYWORDS: {application-defined SQL functions}
+** METHOD: sqlite3
+**
+** ^These functions (collectively known as "function creation routines")
+** are used to add SQL functions or aggregates or to redefine the behavior
+** of existing SQL functions or aggregates. The only differences between
+** the three "sqlite3_create_function*" routines are the text encoding
+** expected for the second parameter (the name of the function being
+** created) and the presence or absence of a destructor callback for
+** the application data pointer. Function sqlite3_create_window_function()
+** is similar, but allows the user to supply the extra callback functions
+** needed by [aggregate window functions].
+**
+** ^The first parameter is the [database connection] to which the SQL
+** function is to be added.  ^If an application uses more than one database
+** connection then application-defined SQL functions must be added
+** to each database connection separately.
+**
+** ^The second parameter is the name of the SQL function to be created or
+** redefined.  ^The length of the name is limited to 255 bytes in a UTF-8
+** representation, exclusive of the zero-terminator.  ^Note that the name
+** length limit is in UTF-8 bytes, not characters nor UTF-16 bytes.
+** ^Any attempt to create a function with a longer name
+** will result in [SQLITE_MISUSE] being returned.
+**
+** ^The third parameter (nArg)
+** is the number of arguments that the SQL function or
+** aggregate takes. ^If this parameter is -1, then the SQL function or
+** aggregate may take any number of arguments between 0 and the limit
+** set by [sqlite3_limit]([SQLITE_LIMIT_FUNCTION_ARG]).  If the third
+** parameter is less than -1 or greater than 127 then the behavior is
+** undefined.
+**
+** ^The fourth parameter, eTextRep, specifies what
+** [SQLITE_UTF8 | text encoding] this SQL function prefers for
+** its parameters.  The application should set this parameter to
+** [SQLITE_UTF16LE] if the function implementation invokes
+** [sqlite3_value_text16le()] on an input, or [SQLITE_UTF16BE] if the
+** implementation invokes [sqlite3_value_text16be()] on an input, or
+** [SQLITE_UTF16] if [sqlite3_value_text16()] is used, or [SQLITE_UTF8]
+** otherwise.  ^The same SQL function may be registered multiple times using
+** different preferred text encodings, with different implementations for
+** each encoding.
+** ^When multiple implementations of the same function are available, SQLite
+** will pick the one that involves the least amount of data conversion.
+**
+** ^The fourth parameter may optionally be ORed with [SQLITE_DETERMINISTIC]
+** to signal that the function will always return the same result given
+** the same inputs within a single SQL statement.  Most SQL functions are
+** deterministic.  The built-in [random()] SQL function is an example of a
+** function that is not deterministic.  The SQLite query planner is able to
+** perform additional optimizations on deterministic functions, so use
+** of the [SQLITE_DETERMINISTIC] flag is recommended where possible.
+**
+** ^(The fifth parameter is an arbitrary pointer.  The implementation of the
+** function can gain access to this pointer using [sqlite3_user_data()].)^
+**
+** ^The sixth, seventh and eighth parameters passed to the three
+** "sqlite3_create_function*" functions, xFunc, xStep and xFinal, are
+** pointers to C-language functions that implement the SQL function or
+** aggregate. ^A scalar SQL function requires an implementation of the xFunc
+** callback only; NULL pointers must be passed as the xStep and xFinal
+** parameters. ^An aggregate SQL function requires an implementation of xStep
+** and xFinal and NULL pointer must be passed for xFunc. ^To delete an existing
+** SQL function or aggregate, pass NULL pointers for all three function
+** callbacks.
+**
+** ^The sixth, seventh, eighth and ninth parameters (xStep, xFinal, xValue
+** and xInverse) passed to sqlite3_create_window_function are pointers to
+** C-language callbacks that implement the new function. xStep and xFinal
+** must both be non-NULL. xValue and xInverse may either both be NULL, in
+** which case a regular aggregate function is created, or must both be
+** non-NULL, in which case the new function may be used as either an aggregate
+** or aggregate window function. More details regarding the implementation
+** of aggregate window functions are
+** [user-defined window functions|available here].
+**
+** ^(If the final parameter to sqlite3_create_function_v2() or
+** sqlite3_create_window_function() is not NULL, then it is destructor for
+** the application data pointer. The destructor is invoked when the function
+** is deleted, either by being overloaded or when the database connection
+** closes.)^ ^The destructor is also invoked if the call to
+** sqlite3_create_function_v2() fails.  ^When the destructor callback is
+** invoked, it is passed a single argument which is a copy of the application
+** data pointer which was the fifth parameter to sqlite3_create_function_v2().
+**
+** ^It is permitted to register multiple implementations of the same
+** functions with the same name but with either differing numbers of
+** arguments or differing preferred text encodings.  ^SQLite will use
+** the implementation that most closely matches the way in which the
+** SQL function is used.  ^A function implementation with a non-negative
+** nArg parameter is a better match than a function implementation with
+** a negative nArg.  ^A function where the preferred text encoding
+** matches the database encoding is a better
+** match than a function where the encoding is different.
+** ^A function where the encoding difference is between UTF16le and UTF16be
+** is a closer match than a function where the encoding difference is
+** between UTF8 and UTF16.
+**
+** ^Built-in functions may be overloaded by new application-defined functions.
+**
+** ^An application-defined function is permitted to call other
+** SQLite interfaces.  However, such calls must not
+** close the database connection nor finalize or reset the prepared
+** statement in which the function is running.
+*/
+int sqlite3_create_function(
+    sqlite3* db,
+    const(char)* zFunctionName,
+    int nArg,
+    int eTextRep,
+    void* pApp,
+    void function(sqlite3_context*, int, sqlite3_value**) xFunc,
+    void function(sqlite3_context*, int, sqlite3_value**) xStep,
+    void function(sqlite3_context*) xFinal);
+int sqlite3_create_function16(
+    sqlite3* db,
+    const(void)* zFunctionName,
+    int nArg,
+    int eTextRep,
+    void* pApp,
+    void function(sqlite3_context*, int, sqlite3_value**) xFunc,
+    void function(sqlite3_context*, int, sqlite3_value**) xStep,
+    void function(sqlite3_context*) xFinal);
+int sqlite3_create_function_v2(
+    sqlite3* db,
+    const(char)* zFunctionName,
+    int nArg,
+    int eTextRep,
+    void* pApp,
+    void function(sqlite3_context*, int, sqlite3_value**) xFunc,
+    void function(sqlite3_context*, int, sqlite3_value**) xStep,
+    void function(sqlite3_context*) xFinal,
+    void function(void*) xDestroy);
+int sqlite3_create_window_function(
+    sqlite3* db,
+    const(char)* zFunctionName,
+    int nArg,
+    int eTextRep,
+    void* pApp,
+    void function(sqlite3_context*, int, sqlite3_value**) xStep,
+    void function(sqlite3_context*) xFinal,
+    void function(sqlite3_context*) xValue,
+    void function(sqlite3_context*, int, sqlite3_value**) xInverse,
+    void function(void*) xDestroy);
+
+/*
+** CAPI3REF: Text Encodings
+**
+** These constant define integer codes that represent the various
+** text encodings supported by SQLite.
+*/
+enum SQLITE_UTF8 = 1; /* IMP: R-37514-35566 */
+enum SQLITE_UTF16LE = 2; /* IMP: R-03371-37637 */
+enum SQLITE_UTF16BE = 3; /* IMP: R-51971-34154 */
+enum SQLITE_UTF16 = 4; /* Use native byte order */
+enum SQLITE_ANY = 5; /* Deprecated */
+enum SQLITE_UTF16_ALIGNED = 8; /* sqlite3_create_collation only */
+
+/*
+** CAPI3REF: Function Flags
+**
+** These constants may be ORed together with the
+** [SQLITE_UTF8 | preferred text encoding] as the fourth argument
+** to [sqlite3_create_function()], [sqlite3_create_function16()], or
+** [sqlite3_create_function_v2()].
+*/
+enum SQLITE_DETERMINISTIC = 0x800;
+
+/*
+** CAPI3REF: Deprecated Functions
+** DEPRECATED
+**
+** These functions are [deprecated].  In order to maintain
+** backwards compatibility with older code, these functions continue
+** to be supported.  However, new applications should avoid
+** the use of these functions.  To encourage programmers to avoid
+** these functions, we will not explain what they do.
+*/
+
+int sqlite3_aggregate_count(sqlite3_context*);
+int sqlite3_expired(sqlite3_stmt*);
+int sqlite3_transfer_bindings(sqlite3_stmt*, sqlite3_stmt*);
+int sqlite3_global_recover();
+void sqlite3_thread_cleanup();
+int sqlite3_memory_alarm(
+    void function(void*, sqlite3_int64, int),
+    void*,
+    sqlite3_int64);
+
+/*
+** CAPI3REF: Obtaining SQL Values
+** METHOD: sqlite3_value
+**
+** <b>Summary:</b>
+** <blockquote><table border=0 cellpadding=0 cellspacing=0>
+** <tr><td><b>sqlite3_value_blob</b><td>&rarr;<td>BLOB value
+** <tr><td><b>sqlite3_value_double</b><td>&rarr;<td>REAL value
+** <tr><td><b>sqlite3_value_int</b><td>&rarr;<td>32-bit INTEGER value
+** <tr><td><b>sqlite3_value_int64</b><td>&rarr;<td>64-bit INTEGER value
+** <tr><td><b>sqlite3_value_pointer</b><td>&rarr;<td>Pointer value
+** <tr><td><b>sqlite3_value_text</b><td>&rarr;<td>UTF-8 TEXT value
+** <tr><td><b>sqlite3_value_text16</b><td>&rarr;<td>UTF-16 TEXT value in
+** the native byteorder
+** <tr><td><b>sqlite3_value_text16be</b><td>&rarr;<td>UTF-16be TEXT value
+** <tr><td><b>sqlite3_value_text16le</b><td>&rarr;<td>UTF-16le TEXT value
+** <tr><td>&nbsp;<td>&nbsp;<td>&nbsp;
+** <tr><td><b>sqlite3_value_bytes</b><td>&rarr;<td>Size of a BLOB
+** or a UTF-8 TEXT in bytes
+** <tr><td><b>sqlite3_value_bytes16&nbsp;&nbsp;</b>
+** <td>&rarr;&nbsp;&nbsp;<td>Size of UTF-16
+** TEXT in bytes
+** <tr><td><b>sqlite3_value_type</b><td>&rarr;<td>Default
+** datatype of the value
+** <tr><td><b>sqlite3_value_numeric_type&nbsp;&nbsp;</b>
+** <td>&rarr;&nbsp;&nbsp;<td>Best numeric datatype of the value
+** <tr><td><b>sqlite3_value_nochange&nbsp;&nbsp;</b>
+** <td>&rarr;&nbsp;&nbsp;<td>True if the column is unchanged in an UPDATE
+** against a virtual table.
+** </table></blockquote>
+**
+** <b>Details:</b>
+**
+** These routines extract type, size, and content information from
+** [protected sqlite3_value] objects.  Protected sqlite3_value objects
+** are used to pass parameter information into implementation of
+** [application-defined SQL functions] and [virtual tables].
+**
+** These routines work only with [protected sqlite3_value] objects.
+** Any attempt to use these routines on an [unprotected sqlite3_value]
+** is not threadsafe.
+**
+** ^These routines work just like the corresponding [column access functions]
+** except that these routines take a single [protected sqlite3_value] object
+** pointer instead of a [sqlite3_stmt*] pointer and an integer column number.
+**
+** ^The sqlite3_value_text16() interface extracts a UTF-16 string
+** in the native byte-order of the host machine.  ^The
+** sqlite3_value_text16be() and sqlite3_value_text16le() interfaces
+** extract UTF-16 strings as big-endian and little-endian respectively.
+**
+** ^If [sqlite3_value] object V was initialized
+** using [sqlite3_bind_pointer(S,I,P,X,D)] or [sqlite3_result_pointer(C,P,X,D)]
+** and if X and Y are strings that compare equal according to strcmp(X,Y),
+** then sqlite3_value_pointer(V,Y) will return the pointer P.  ^Otherwise,
+** sqlite3_value_pointer(V,Y) returns a NULL. The sqlite3_bind_pointer()
+** routine is part of the [pointer passing interface] added for SQLite 3.20.0.
+**
+** ^(The sqlite3_value_type(V) interface returns the
+** [SQLITE_INTEGER | datatype code] for the initial datatype of the
+** [sqlite3_value] object V. The returned value is one of [SQLITE_INTEGER],
+** [SQLITE_FLOAT], [SQLITE_TEXT], [SQLITE_BLOB], or [SQLITE_NULL].)^
+** Other interfaces might change the datatype for an sqlite3_value object.
+** For example, if the datatype is initially SQLITE_INTEGER and
+** sqlite3_value_text(V) is called to extract a text value for that
+** integer, then subsequent calls to sqlite3_value_type(V) might return
+** SQLITE_TEXT.  Whether or not a persistent internal datatype conversion
+** occurs is undefined and may change from one release of SQLite to the next.
+**
+** ^(The sqlite3_value_numeric_type() interface attempts to apply
+** numeric affinity to the value.  This means that an attempt is
+** made to convert the value to an integer or floating point.  If
+** such a conversion is possible without loss of information (in other
+** words, if the value is a string that looks like a number)
+** then the conversion is performed.  Otherwise no conversion occurs.
+** The [SQLITE_INTEGER | datatype] after conversion is returned.)^
+**
+** ^Within the [xUpdate] method of a [virtual table], the
+** sqlite3_value_nochange(X) interface returns true if and only if
+** the column corresponding to X is unchanged by the UPDATE operation
+** that the xUpdate method call was invoked to implement and if
+** and the prior [xColumn] method call that was invoked to extracted
+** the value for that column returned without setting a result (probably
+** because it queried [sqlite3_vtab_nochange()] and found that the column
+** was unchanging).  ^Within an [xUpdate] method, any value for which
+** sqlite3_value_nochange(X) is true will in all other respects appear
+** to be a NULL value.  If sqlite3_value_nochange(X) is invoked anywhere other
+** than within an [xUpdate] method call for an UPDATE statement, then
+** the return value is arbitrary and meaningless.
+**
+** Please pay particular attention to the fact that the pointer returned
+** from [sqlite3_value_blob()], [sqlite3_value_text()], or
+** [sqlite3_value_text16()] can be invalidated by a subsequent call to
+** [sqlite3_value_bytes()], [sqlite3_value_bytes16()], [sqlite3_value_text()],
+** or [sqlite3_value_text16()].
+**
+** These routines must be called from the same thread as
+** the SQL function that supplied the [sqlite3_value*] parameters.
+**
+** As long as the input parameter is correct, these routines can only
+** fail if an out-of-memory error occurs during a format conversion.
+** Only the following subset of interfaces are subject to out-of-memory
+** errors:
+**
+** <ul>
+** <li> sqlite3_value_blob()
+** <li> sqlite3_value_text()
+** <li> sqlite3_value_text16()
+** <li> sqlite3_value_text16le()
+** <li> sqlite3_value_text16be()
+** <li> sqlite3_value_bytes()
+** <li> sqlite3_value_bytes16()
+** </ul>
+**
+** If an out-of-memory error occurs, then the return value from these
+** routines is the same as if the column had contained an SQL NULL value.
+** Valid SQL NULL returns can be distinguished from out-of-memory errors
+** by invoking the [sqlite3_errcode()] immediately after the suspect
+** return value is obtained and before any
+** other SQLite interface is called on the same [database connection].
+*/
+const(void)* sqlite3_value_blob(sqlite3_value*);
+double sqlite3_value_double(sqlite3_value*);
+int sqlite3_value_int(sqlite3_value*);
+sqlite3_int64 sqlite3_value_int64(sqlite3_value*);
+void* sqlite3_value_pointer(sqlite3_value*, const(char)*);
+const(ubyte)* sqlite3_value_text(sqlite3_value*);
+const(void)* sqlite3_value_text16(sqlite3_value*);
+const(void)* sqlite3_value_text16le(sqlite3_value*);
+const(void)* sqlite3_value_text16be(sqlite3_value*);
+int sqlite3_value_bytes(sqlite3_value*);
+int sqlite3_value_bytes16(sqlite3_value*);
+int sqlite3_value_type(sqlite3_value*);
+int sqlite3_value_numeric_type(sqlite3_value*);
+int sqlite3_value_nochange(sqlite3_value*);
+
+/*
+** CAPI3REF: Finding The Subtype Of SQL Values
+** METHOD: sqlite3_value
+**
+** The sqlite3_value_subtype(V) function returns the subtype for
+** an [application-defined SQL function] argument V.  The subtype
+** information can be used to pass a limited amount of context from
+** one SQL function to another.  Use the [sqlite3_result_subtype()]
+** routine to set the subtype for the return value of an SQL function.
+*/
+uint sqlite3_value_subtype(sqlite3_value*);
+
+/*
+** CAPI3REF: Copy And Free SQL Values
+** METHOD: sqlite3_value
+**
+** ^The sqlite3_value_dup(V) interface makes a copy of the [sqlite3_value]
+** object D and returns a pointer to that copy.  ^The [sqlite3_value] returned
+** is a [protected sqlite3_value] object even if the input is not.
+** ^The sqlite3_value_dup(V) interface returns NULL if V is NULL or if a
+** memory allocation fails.
+**
+** ^The sqlite3_value_free(V) interface frees an [sqlite3_value] object
+** previously obtained from [sqlite3_value_dup()].  ^If V is a NULL pointer
+** then sqlite3_value_free(V) is a harmless no-op.
+*/
+sqlite3_value* sqlite3_value_dup(const(sqlite3_value)*);
+void sqlite3_value_free(sqlite3_value*);
+
+/*
+** CAPI3REF: Obtain Aggregate Function Context
+** METHOD: sqlite3_context
+**
+** Implementations of aggregate SQL functions use this
+** routine to allocate memory for storing their state.
+**
+** ^The first time the sqlite3_aggregate_context(C,N) routine is called
+** for a particular aggregate function, SQLite
+** allocates N of memory, zeroes out that memory, and returns a pointer
+** to the new memory. ^On second and subsequent calls to
+** sqlite3_aggregate_context() for the same aggregate function instance,
+** the same buffer is returned.  Sqlite3_aggregate_context() is normally
+** called once for each invocation of the xStep callback and then one
+** last time when the xFinal callback is invoked.  ^(When no rows match
+** an aggregate query, the xStep() callback of the aggregate function
+** implementation is never called and xFinal() is called exactly once.
+** In those cases, sqlite3_aggregate_context() might be called for the
+** first time from within xFinal().)^
+**
+** ^The sqlite3_aggregate_context(C,N) routine returns a NULL pointer
+** when first called if N is less than or equal to zero or if a memory
+** allocate error occurs.
+**
+** ^(The amount of space allocated by sqlite3_aggregate_context(C,N) is
+** determined by the N parameter on first successful call.  Changing the
+** value of N in subsequent call to sqlite3_aggregate_context() within
+** the same aggregate function instance will not resize the memory
+** allocation.)^  Within the xFinal callback, it is customary to set
+** N=0 in calls to sqlite3_aggregate_context(C,N) so that no
+** pointless memory allocations occur.
+**
+** ^SQLite automatically frees the memory allocated by
+** sqlite3_aggregate_context() when the aggregate query concludes.
+**
+** The first parameter must be a copy of the
+** [sqlite3_context | SQL function context] that is the first parameter
+** to the xStep or xFinal callback routine that implements the aggregate
+** function.
+**
+** This routine must be called from the same thread in which
+** the aggregate SQL function is running.
+*/
+void* sqlite3_aggregate_context(sqlite3_context*, int nBytes);
+
+/*
+** CAPI3REF: User Data For Functions
+** METHOD: sqlite3_context
+**
+** ^The sqlite3_user_data() interface returns a copy of
+** the pointer that was the pUserData parameter (the 5th parameter)
+** of the [sqlite3_create_function()]
+** and [sqlite3_create_function16()] routines that originally
+** registered the application defined function.
+**
+** This routine must be called from the same thread in which
+** the application-defined function is running.
+*/
+void* sqlite3_user_data(sqlite3_context*);
+
+/*
+** CAPI3REF: Database Connection For Functions
+** METHOD: sqlite3_context
+**
+** ^The sqlite3_context_db_handle() interface returns a copy of
+** the pointer to the [database connection] (the 1st parameter)
+** of the [sqlite3_create_function()]
+** and [sqlite3_create_function16()] routines that originally
+** registered the application defined function.
+*/
+sqlite3* sqlite3_context_db_handle(sqlite3_context*);
+
+/*
+** CAPI3REF: Function Auxiliary Data
+** METHOD: sqlite3_context
+**
+** These functions may be used by (non-aggregate) SQL functions to
+** associate metadata with argument values. If the same value is passed to
+** multiple invocations of the same SQL function during query execution, under
+** some circumstances the associated metadata may be preserved.  An example
+** of where this might be useful is in a regular-expression matching
+** function. The compiled version of the regular expression can be stored as
+** metadata associated with the pattern string.
+** Then as long as the pattern string remains the same,
+** the compiled regular expression can be reused on multiple
+** invocations of the same function.
+**
+** ^The sqlite3_get_auxdata(C,N) interface returns a pointer to the metadata
+** associated by the sqlite3_set_auxdata(C,N,P,X) function with the Nth argument
+** value to the application-defined function.  ^N is zero for the left-most
+** function argument.  ^If there is no metadata
+** associated with the function argument, the sqlite3_get_auxdata(C,N) interface
+** returns a NULL pointer.
+**
+** ^The sqlite3_set_auxdata(C,N,P,X) interface saves P as metadata for the N-th
+** argument of the application-defined function.  ^Subsequent
+** calls to sqlite3_get_auxdata(C,N) return P from the most recent
+** sqlite3_set_auxdata(C,N,P,X) call if the metadata is still valid or
+** NULL if the metadata has been discarded.
+** ^After each call to sqlite3_set_auxdata(C,N,P,X) where X is not NULL,
+** SQLite will invoke the destructor function X with parameter P exactly
+** once, when the metadata is discarded.
+** SQLite is free to discard the metadata at any time, including: <ul>
+** <li> ^(when the corresponding function parameter changes)^, or
+** <li> ^(when [sqlite3_reset()] or [sqlite3_finalize()] is called for the
+**      SQL statement)^, or
+** <li> ^(when sqlite3_set_auxdata() is invoked again on the same
+**       parameter)^, or
+** <li> ^(during the original sqlite3_set_auxdata() call when a memory
+**      allocation error occurs.)^ </ul>
+**
+** Note the last bullet in particular.  The destructor X in
+** sqlite3_set_auxdata(C,N,P,X) might be called immediately, before the
+** sqlite3_set_auxdata() interface even returns.  Hence sqlite3_set_auxdata()
+** should be called near the end of the function implementation and the
+** function implementation should not make any use of P after
+** sqlite3_set_auxdata() has been called.
+**
+** ^(In practice, metadata is preserved between function calls for
+** function parameters that are compile-time constants, including literal
+** values and [parameters] and expressions composed from the same.)^
+**
+** The value of the N parameter to these interfaces should be non-negative.
+** Future enhancements may make use of negative N values to define new
+** kinds of function caching behavior.
+**
+** These routines must be called from the same thread in which
+** the SQL function is running.
+*/
+void* sqlite3_get_auxdata(sqlite3_context*, int N);
+void sqlite3_set_auxdata(sqlite3_context*, int N, void*, void function(void*));
+
+/*
+** CAPI3REF: Constants Defining Special Destructor Behavior
+**
+** These are special values for the destructor that is passed in as the
+** final argument to routines like [sqlite3_result_blob()].  ^If the destructor
+** argument is SQLITE_STATIC, it means that the content pointer is constant
+** and will never change.  It does not need to be destroyed.  ^The
+** SQLITE_TRANSIENT value means that the content will likely change in
+** the near future and that SQLite should make its own private copy of
+** the content before returning.
+**
+** The typedef is necessary to work around problems in certain
+** C++ compilers.
+*/
+alias sqlite3_destructor_type = void function(void*);
+enum SQLITE_STATIC = cast(sqlite3_destructor_type) 0;
+enum SQLITE_TRANSIENT = cast(sqlite3_destructor_type) -1;
+
+/*
+** CAPI3REF: Setting The Result Of An SQL Function
+** METHOD: sqlite3_context
+**
+** These routines are used by the xFunc or xFinal callbacks that
+** implement SQL functions and aggregates.  See
+** [sqlite3_create_function()] and [sqlite3_create_function16()]
+** for additional information.
+**
+** These functions work very much like the [parameter binding] family of
+** functions used to bind values to host parameters in prepared statements.
+** Refer to the [SQL parameter] documentation for additional information.
+**
+** ^The sqlite3_result_blob() interface sets the result from
+** an application-defined function to be the BLOB whose content is pointed
+** to by the second parameter and which is N bytes long where N is the
+** third parameter.
+**
+** ^The sqlite3_result_zeroblob(C,N) and sqlite3_result_zeroblob64(C,N)
+** interfaces set the result of the application-defined function to be
+** a BLOB containing all zero bytes and N bytes in size.
+**
+** ^The sqlite3_result_double() interface sets the result from
+** an application-defined function to be a floating point value specified
+** by its 2nd argument.
+**
+** ^The sqlite3_result_error() and sqlite3_result_error16() functions
+** cause the implemented SQL function to throw an exception.
+** ^SQLite uses the string pointed to by the
+** 2nd parameter of sqlite3_result_error() or sqlite3_result_error16()
+** as the text of an error message.  ^SQLite interprets the error
+** message string from sqlite3_result_error() as UTF-8. ^SQLite
+** interprets the string from sqlite3_result_error16() as UTF-16 in native
+** byte order.  ^If the third parameter to sqlite3_result_error()
+** or sqlite3_result_error16() is negative then SQLite takes as the error
+** message all text up through the first zero character.
+** ^If the third parameter to sqlite3_result_error() or
+** sqlite3_result_error16() is non-negative then SQLite takes that many
+** bytes (not characters) from the 2nd parameter as the error message.
+** ^The sqlite3_result_error() and sqlite3_result_error16()
+** routines make a private copy of the error message text before
+** they return.  Hence, the calling function can deallocate or
+** modify the text after they return without harm.
+** ^The sqlite3_result_error_code() function changes the error code
+** returned by SQLite as a result of an error in a function.  ^By default,
+** the error code is SQLITE_ERROR.  ^A subsequent call to sqlite3_result_error()
+** or sqlite3_result_error16() resets the error code to SQLITE_ERROR.
+**
+** ^The sqlite3_result_error_toobig() interface causes SQLite to throw an
+** error indicating that a string or BLOB is too long to represent.
+**
+** ^The sqlite3_result_error_nomem() interface causes SQLite to throw an
+** error indicating that a memory allocation failed.
+**
+** ^The sqlite3_result_int() interface sets the return value
+** of the application-defined function to be the 32-bit signed integer
+** value given in the 2nd argument.
+** ^The sqlite3_result_int64() interface sets the return value
+** of the application-defined function to be the 64-bit signed integer
+** value given in the 2nd argument.
+**
+** ^The sqlite3_result_null() interface sets the return value
+** of the application-defined function to be NULL.
+**
+** ^The sqlite3_result_text(), sqlite3_result_text16(),
+** sqlite3_result_text16le(), and sqlite3_result_text16be() interfaces
+** set the return value of the application-defined function to be
+** a text string which is represented as UTF-8, UTF-16 native byte order,
+** UTF-16 little endian, or UTF-16 big endian, respectively.
+** ^The sqlite3_result_text64() interface sets the return value of an
+** application-defined function to be a text string in an encoding
+** specified by the fifth (and last) parameter, which must be one
+** of [SQLITE_UTF8], [SQLITE_UTF16], [SQLITE_UTF16BE], or [SQLITE_UTF16LE].
+** ^SQLite takes the text result from the application from
+** the 2nd parameter of the sqlite3_result_text* interfaces.
+** ^If the 3rd parameter to the sqlite3_result_text* interfaces
+** is negative, then SQLite takes result text from the 2nd parameter
+** through the first zero character.
+** ^If the 3rd parameter to the sqlite3_result_text* interfaces
+** is non-negative, then as many bytes (not characters) of the text
+** pointed to by the 2nd parameter are taken as the application-defined
+** function result.  If the 3rd parameter is non-negative, then it
+** must be the byte offset into the string where the NUL terminator would
+** appear if the string where NUL terminated.  If any NUL characters occur
+** in the string at a byte offset that is less than the value of the 3rd
+** parameter, then the resulting string will contain embedded NULs and the
+** result of expressions operating on strings with embedded NULs is undefined.
+** ^If the 4th parameter to the sqlite3_result_text* interfaces
+** or sqlite3_result_blob is a non-NULL pointer, then SQLite calls that
+** function as the destructor on the text or BLOB result when it has
+** finished using that result.
+** ^If the 4th parameter to the sqlite3_result_text* interfaces or to
+** sqlite3_result_blob is the special constant SQLITE_STATIC, then SQLite
+** assumes that the text or BLOB result is in constant space and does not
+** copy the content of the parameter nor call a destructor on the content
+** when it has finished using that result.
+** ^If the 4th parameter to the sqlite3_result_text* interfaces
+** or sqlite3_result_blob is the special constant SQLITE_TRANSIENT
+** then SQLite makes a copy of the result into space obtained
+** from [sqlite3_malloc()] before it returns.
+**
+** ^The sqlite3_result_value() interface sets the result of
+** the application-defined function to be a copy of the
+** [unprotected sqlite3_value] object specified by the 2nd parameter.  ^The
+** sqlite3_result_value() interface makes a copy of the [sqlite3_value]
+** so that the [sqlite3_value] specified in the parameter may change or
+** be deallocated after sqlite3_result_value() returns without harm.
+** ^A [protected sqlite3_value] object may always be used where an
+** [unprotected sqlite3_value] object is required, so either
+** kind of [sqlite3_value] object can be used with this interface.
+**
+** ^The sqlite3_result_pointer(C,P,T,D) interface sets the result to an
+** SQL NULL value, just like [sqlite3_result_null(C)], except that it
+** also associates the host-language pointer P or type T with that
+** NULL value such that the pointer can be retrieved within an
+** [application-defined SQL function] using [sqlite3_value_pointer()].
+** ^If the D parameter is not NULL, then it is a pointer to a destructor
+** for the P parameter.  ^SQLite invokes D with P as its only argument
+** when SQLite is finished with P.  The T parameter should be a static
+** string and preferably a string literal. The sqlite3_result_pointer()
+** routine is part of the [pointer passing interface] added for SQLite 3.20.0.
+**
+** If these routines are called from within the different thread
+** than the one containing the application-defined function that received
+** the [sqlite3_context] pointer, the results are undefined.
+*/
+void sqlite3_result_blob(sqlite3_context*, const(void)*, int, void function(void*));
+void sqlite3_result_blob64(
+    sqlite3_context*,
+    const(void)*,
+    sqlite3_uint64,
+    void function(void*));
+void sqlite3_result_double(sqlite3_context*, double);
+void sqlite3_result_error(sqlite3_context*, const(char)*, int);
+void sqlite3_result_error16(sqlite3_context*, const(void)*, int);
+void sqlite3_result_error_toobig(sqlite3_context*);
+void sqlite3_result_error_nomem(sqlite3_context*);
+void sqlite3_result_error_code(sqlite3_context*, int);
+void sqlite3_result_int(sqlite3_context*, int);
+void sqlite3_result_int64(sqlite3_context*, sqlite3_int64);
+void sqlite3_result_null(sqlite3_context*);
+void sqlite3_result_text(sqlite3_context*, const(char)*, int, void function(void*));
+void sqlite3_result_text64(
+    sqlite3_context*,
+    const(char)*,
+    sqlite3_uint64,
+    void function(void*),
+    ubyte encoding);
+void sqlite3_result_text16(sqlite3_context*, const(void)*, int, void function(void*));
+void sqlite3_result_text16le(sqlite3_context*, const(void)*, int, void function(void*));
+void sqlite3_result_text16be(sqlite3_context*, const(void)*, int, void function(void*));
+void sqlite3_result_value(sqlite3_context*, sqlite3_value*);
+void sqlite3_result_pointer(sqlite3_context*, void*, const(char)*, void function(void*));
+void sqlite3_result_zeroblob(sqlite3_context*, int n);
+int sqlite3_result_zeroblob64(sqlite3_context*, sqlite3_uint64 n);
+
+/*
+** CAPI3REF: Setting The Subtype Of An SQL Function
+** METHOD: sqlite3_context
+**
+** The sqlite3_result_subtype(C,T) function causes the subtype of
+** the result from the [application-defined SQL function] with
+** [sqlite3_context] C to be the value T.  Only the lower 8 bits
+** of the subtype T are preserved in current versions of SQLite;
+** higher order bits are discarded.
+** The number of subtype bytes preserved by SQLite might increase
+** in future releases of SQLite.
+*/
+void sqlite3_result_subtype(sqlite3_context*, uint);
+
+/*
+** CAPI3REF: Define New Collating Sequences
+** METHOD: sqlite3
+**
+** ^These functions add, remove, or modify a [collation] associated
+** with the [database connection] specified as the first argument.
+**
+** ^The name of the collation is a UTF-8 string
+** for sqlite3_create_collation() and sqlite3_create_collation_v2()
+** and a UTF-16 string in native byte order for sqlite3_create_collation16().
+** ^Collation names that compare equal according to [sqlite3_strnicmp()] are
+** considered to be the same name.
+**
+** ^(The third argument (eTextRep) must be one of the constants:
+** <ul>
+** <li> [SQLITE_UTF8],
+** <li> [SQLITE_UTF16LE],
+** <li> [SQLITE_UTF16BE],
+** <li> [SQLITE_UTF16], or
+** <li> [SQLITE_UTF16_ALIGNED].
+** </ul>)^
+** ^The eTextRep argument determines the encoding of strings passed
+** to the collating function callback, xCallback.
+** ^The [SQLITE_UTF16] and [SQLITE_UTF16_ALIGNED] values for eTextRep
+** force strings to be UTF16 with native byte order.
+** ^The [SQLITE_UTF16_ALIGNED] value for eTextRep forces strings to begin
+** on an even byte address.
+**
+** ^The fourth argument, pArg, is an application data pointer that is passed
+** through as the first argument to the collating function callback.
+**
+** ^The fifth argument, xCallback, is a pointer to the collating function.
+** ^Multiple collating functions can be registered using the same name but
+** with different eTextRep parameters and SQLite will use whichever
+** function requires the least amount of data transformation.
+** ^If the xCallback argument is NULL then the collating function is
+** deleted.  ^When all collating functions having the same name are deleted,
+** that collation is no longer usable.
+**
+** ^The collating function callback is invoked with a copy of the pArg
+** application data pointer and with two strings in the encoding specified
+** by the eTextRep argument.  The collating function must return an
+** integer that is negative, zero, or positive
+** if the first string is less than, equal to, or greater than the second,
+** respectively.  A collating function must always return the same answer
+** given the same inputs.  If two or more collating functions are registered
+** to the same collation name (using different eTextRep values) then all
+** must give an equivalent answer when invoked with equivalent strings.
+** The collating function must obey the following properties for all
+** strings A, B, and C:
+**
+** <ol>
+** <li> If A==B then B==A.
+** <li> If A==B and B==C then A==C.
+** <li> If A&lt;B THEN B&gt;A.
+** <li> If A&lt;B and B&lt;C then A&lt;C.
+** </ol>
+**
+** If a collating function fails any of the above constraints and that
+** collating function is  registered and used, then the behavior of SQLite
+** is undefined.
+**
+** ^The sqlite3_create_collation_v2() works like sqlite3_create_collation()
+** with the addition that the xDestroy callback is invoked on pArg when
+** the collating function is deleted.
+** ^Collating functions are deleted when they are overridden by later
+** calls to the collation creation functions or when the
+** [database connection] is closed using [sqlite3_close()].
+**
+** ^The xDestroy callback is <u>not</u> called if the
+** sqlite3_create_collation_v2() function fails.  Applications that invoke
+** sqlite3_create_collation_v2() with a non-NULL xDestroy argument should
+** check the return code and dispose of the application data pointer
+** themselves rather than expecting SQLite to deal with it for them.
+** This is different from every other SQLite interface.  The inconsistency
+** is unfortunate but cannot be changed without breaking backwards
+** compatibility.
+**
+** See also:  [sqlite3_collation_needed()] and [sqlite3_collation_needed16()].
+*/
+int sqlite3_create_collation(
+    sqlite3*,
+    const(char)* zName,
+    int eTextRep,
+    void* pArg,
+    int function(void*, int, const(void)*, int, const(void)*) xCompare);
+int sqlite3_create_collation_v2(
+    sqlite3*,
+    const(char)* zName,
+    int eTextRep,
+    void* pArg,
+    int function(void*, int, const(void)*, int, const(void)*) xCompare,
+    void function(void*) xDestroy);
+int sqlite3_create_collation16(
+    sqlite3*,
+    const(void)* zName,
+    int eTextRep,
+    void* pArg,
+    int function(void*, int, const(void)*, int, const(void)*) xCompare);
+
+/*
+** CAPI3REF: Collation Needed Callbacks
+** METHOD: sqlite3
+**
+** ^To avoid having to register all collation sequences before a database
+** can be used, a single callback function may be registered with the
+** [database connection] to be invoked whenever an undefined collation
+** sequence is required.
+**
+** ^If the function is registered using the sqlite3_collation_needed() API,
+** then it is passed the names of undefined collation sequences as strings
+** encoded in UTF-8. ^If sqlite3_collation_needed16() is used,
+** the names are passed as UTF-16 in machine native byte order.
+** ^A call to either function replaces the existing collation-needed callback.
+**
+** ^(When the callback is invoked, the first argument passed is a copy
+** of the second argument to sqlite3_collation_needed() or
+** sqlite3_collation_needed16().  The second argument is the database
+** connection.  The third argument is one of [SQLITE_UTF8], [SQLITE_UTF16BE],
+** or [SQLITE_UTF16LE], indicating the most desirable form of the collation
+** sequence function required.  The fourth parameter is the name of the
+** required collation sequence.)^
+**
+** The callback function should register the desired collation using
+** [sqlite3_create_collation()], [sqlite3_create_collation16()], or
+** [sqlite3_create_collation_v2()].
+*/
+int sqlite3_collation_needed(
+    sqlite3*,
+    void*,
+    void function(void*, sqlite3*, int eTextRep, const(char)*));
+int sqlite3_collation_needed16(
+    sqlite3*,
+    void*,
+    void function(void*, sqlite3*, int eTextRep, const(void)*));
+
+/*
+** Specify the key for an encrypted database.  This routine should be
+** called right after sqlite3_open().
+**
+** The code to implement this API is not available in the public release
+** of SQLite.
+*/
+
+/* Database to be rekeyed */
+/* The key */
+
+/* Database to be rekeyed */
+/* Name of the database */
+/* The key */
+
+/*
+** Change the key on an open database.  If the current database is not
+** encrypted, this routine will encrypt it.  If pNew==0 or nNew==0, the
+** database is decrypted.
+**
+** The code to implement this API is not available in the public release
+** of SQLite.
+*/
+
+/* Database to be rekeyed */
+/* The new key */
+
+/* Database to be rekeyed */
+/* Name of the database */
+/* The new key */
+
+/*
+** Specify the activation key for a SEE database.  Unless
+** activated, none of the SEE routines will work.
+*/
+
+/* Activation phrase */
+
+/*
+** Specify the activation key for a CEROD database.  Unless
+** activated, none of the CEROD routines will work.
+*/
+
+/* Activation phrase */
+
+/*
+** CAPI3REF: Suspend Execution For A Short Time
+**
+** The sqlite3_sleep() function causes the current thread to suspend execution
+** for at least a number of milliseconds specified in its parameter.
+**
+** If the operating system does not support sleep requests with
+** millisecond time resolution, then the time will be rounded up to
+** the nearest second. The number of milliseconds of sleep actually
+** requested from the operating system is returned.
+**
+** ^SQLite implements this interface by calling the xSleep()
+** method of the default [sqlite3_vfs] object.  If the xSleep() method
+** of the default VFS is not implemented correctly, or not implemented at
+** all, then the behavior of sqlite3_sleep() may deviate from the description
+** in the previous paragraphs.
+*/
+int sqlite3_sleep(int);
+
+/*
+** CAPI3REF: Name Of The Folder Holding Temporary Files
+**
+** ^(If this global variable is made to point to a string which is
+** the name of a folder (a.k.a. directory), then all temporary files
+** created by SQLite when using a built-in [sqlite3_vfs | VFS]
+** will be placed in that directory.)^  ^If this variable
+** is a NULL pointer, then SQLite performs a search for an appropriate
+** temporary file directory.
+**
+** Applications are strongly discouraged from using this global variable.
+** It is required to set a temporary folder on Windows Runtime (WinRT).
+** But for all other platforms, it is highly recommended that applications
+** neither read nor write this variable.  This global variable is a relic
+** that exists for backwards compatibility of legacy applications and should
+** be avoided in new projects.
+**
+** It is not safe to read or modify this variable in more than one
+** thread at a time.  It is not safe to read or modify this variable
+** if a [database connection] is being used at the same time in a separate
+** thread.
+** It is intended that this variable be set once
+** as part of process initialization and before any SQLite interface
+** routines have been called and that this variable remain unchanged
+** thereafter.
+**
+** ^The [temp_store_directory pragma] may modify this variable and cause
+** it to point to memory obtained from [sqlite3_malloc].  ^Furthermore,
+** the [temp_store_directory pragma] always assumes that any string
+** that this variable points to is held in memory obtained from
+** [sqlite3_malloc] and the pragma may attempt to free that memory
+** using [sqlite3_free].
+** Hence, if this variable is modified directly, either it should be
+** made NULL or made to point to memory obtained from [sqlite3_malloc]
+** or else the use of the [temp_store_directory pragma] should be avoided.
+** Except when requested by the [temp_store_directory pragma], SQLite
+** does not free the memory that sqlite3_temp_directory points to.  If
+** the application wants that memory to be freed, it must do
+** so itself, taking care to only do so after all [database connection]
+** objects have been destroyed.
+**
+** <b>Note to Windows Runtime users:</b>  The temporary directory must be set
+** prior to calling [sqlite3_open] or [sqlite3_open_v2].  Otherwise, various
+** features that require the use of temporary files may fail.  Here is an
+** example of how to do this using C++ with the Windows Runtime:
+**
+** <blockquote><pre>
+** LPCWSTR zPath = Windows::Storage::ApplicationData::Current->
+** &nbsp;     TemporaryFolder->Path->Data();
+** char zPathBuf&#91;MAX_PATH + 1&#93;;
+** memset(zPathBuf, 0, sizeof(zPathBuf));
+** WideCharToMultiByte(CP_UTF8, 0, zPath, -1, zPathBuf, sizeof(zPathBuf),
+** &nbsp;     NULL, NULL);
+** sqlite3_temp_directory = sqlite3_mprintf("%s", zPathBuf);
+** </pre></blockquote>
+*/
+extern __gshared char* sqlite3_temp_directory;
+
+/*
+** CAPI3REF: Name Of The Folder Holding Database Files
+**
+** ^(If this global variable is made to point to a string which is
+** the name of a folder (a.k.a. directory), then all database files
+** specified with a relative pathname and created or accessed by
+** SQLite when using a built-in windows [sqlite3_vfs | VFS] will be assumed
+** to be relative to that directory.)^ ^If this variable is a NULL
+** pointer, then SQLite assumes that all database files specified
+** with a relative pathname are relative to the current directory
+** for the process.  Only the windows VFS makes use of this global
+** variable; it is ignored by the unix VFS.
+**
+** Changing the value of this variable while a database connection is
+** open can result in a corrupt database.
+**
+** It is not safe to read or modify this variable in more than one
+** thread at a time.  It is not safe to read or modify this variable
+** if a [database connection] is being used at the same time in a separate
+** thread.
+** It is intended that this variable be set once
+** as part of process initialization and before any SQLite interface
+** routines have been called and that this variable remain unchanged
+** thereafter.
+**
+** ^The [data_store_directory pragma] may modify this variable and cause
+** it to point to memory obtained from [sqlite3_malloc].  ^Furthermore,
+** the [data_store_directory pragma] always assumes that any string
+** that this variable points to is held in memory obtained from
+** [sqlite3_malloc] and the pragma may attempt to free that memory
+** using [sqlite3_free].
+** Hence, if this variable is modified directly, either it should be
+** made NULL or made to point to memory obtained from [sqlite3_malloc]
+** or else the use of the [data_store_directory pragma] should be avoided.
+*/
+extern __gshared char* sqlite3_data_directory;
+
+/*
+** CAPI3REF: Win32 Specific Interface
+**
+** These interfaces are available only on Windows.  The
+** [sqlite3_win32_set_directory] interface is used to set the value associated
+** with the [sqlite3_temp_directory] or [sqlite3_data_directory] variable, to
+** zValue, depending on the value of the type parameter.  The zValue parameter
+** should be NULL to cause the previous value to be freed via [sqlite3_free];
+** a non-NULL value will be copied into memory obtained from [sqlite3_malloc]
+** prior to being used.  The [sqlite3_win32_set_directory] interface returns
+** [SQLITE_OK] to indicate success, [SQLITE_ERROR] if the type is unsupported,
+** or [SQLITE_NOMEM] if memory could not be allocated.  The value of the
+** [sqlite3_data_directory] variable is intended to act as a replacement for
+** the current directory on the sub-platforms of Win32 where that concept is
+** not present, e.g. WinRT and UWP.  The [sqlite3_win32_set_directory8] and
+** [sqlite3_win32_set_directory16] interfaces behave exactly the same as the
+** sqlite3_win32_set_directory interface except the string parameter must be
+** UTF-8 or UTF-16, respectively.
+*/
+/* Identifier for directory being set or reset */
+/* New value for directory being set or reset */
+int sqlite3_win32_set_directory(c_ulong type, void* zValue);
+int sqlite3_win32_set_directory8(c_ulong type, const(char)* zValue);
+int sqlite3_win32_set_directory16(c_ulong type, const(void)* zValue);
+
+/*
+** CAPI3REF: Win32 Directory Types
+**
+** These macros are only available on Windows.  They define the allowed values
+** for the type argument to the [sqlite3_win32_set_directory] interface.
+*/
+enum SQLITE_WIN32_DATA_DIRECTORY_TYPE = 1;
+enum SQLITE_WIN32_TEMP_DIRECTORY_TYPE = 2;
+
+/*
+** CAPI3REF: Test For Auto-Commit Mode
+** KEYWORDS: {autocommit mode}
+** METHOD: sqlite3
+**
+** ^The sqlite3_get_autocommit() interface returns non-zero or
+** zero if the given database connection is or is not in autocommit mode,
+** respectively.  ^Autocommit mode is on by default.
+** ^Autocommit mode is disabled by a [BEGIN] statement.
+** ^Autocommit mode is re-enabled by a [COMMIT] or [ROLLBACK].
+**
+** If certain kinds of errors occur on a statement within a multi-statement
+** transaction (errors including [SQLITE_FULL], [SQLITE_IOERR],
+** [SQLITE_NOMEM], [SQLITE_BUSY], and [SQLITE_INTERRUPT]) then the
+** transaction might be rolled back automatically.  The only way to
+** find out whether SQLite automatically rolled back the transaction after
+** an error is to use this function.
+**
+** If another thread changes the autocommit status of the database
+** connection while this routine is running, then the return value
+** is undefined.
+*/
+int sqlite3_get_autocommit(sqlite3*);
+
+/*
+** CAPI3REF: Find The Database Handle Of A Prepared Statement
+** METHOD: sqlite3_stmt
+**
+** ^The sqlite3_db_handle interface returns the [database connection] handle
+** to which a [prepared statement] belongs.  ^The [database connection]
+** returned by sqlite3_db_handle is the same [database connection]
+** that was the first argument
+** to the [sqlite3_prepare_v2()] call (or its variants) that was used to
+** create the statement in the first place.
+*/
+sqlite3* sqlite3_db_handle(sqlite3_stmt*);
+
+/*
+** CAPI3REF: Return The Filename For A Database Connection
+** METHOD: sqlite3
+**
+** ^The sqlite3_db_filename(D,N) interface returns a pointer to a filename
+** associated with database N of connection D.  ^The main database file
+** has the name "main".  If there is no attached database N on the database
+** connection D, or if database N is a temporary or in-memory database, then
+** a NULL pointer is returned.
+**
+** ^The filename returned by this function is the output of the
+** xFullPathname method of the [VFS].  ^In other words, the filename
+** will be an absolute pathname, even if the filename used
+** to open the database originally was a URI or relative pathname.
+*/
+const(char)* sqlite3_db_filename(sqlite3* db, const(char)* zDbName);
+
+/*
+** CAPI3REF: Determine if a database is read-only
+** METHOD: sqlite3
+**
+** ^The sqlite3_db_readonly(D,N) interface returns 1 if the database N
+** of connection D is read-only, 0 if it is read/write, or -1 if N is not
+** the name of a database on connection D.
+*/
+int sqlite3_db_readonly(sqlite3* db, const(char)* zDbName);
+
+/*
+** CAPI3REF: Find the next prepared statement
+** METHOD: sqlite3
+**
+** ^This interface returns a pointer to the next [prepared statement] after
+** pStmt associated with the [database connection] pDb.  ^If pStmt is NULL
+** then this interface returns a pointer to the first prepared statement
+** associated with the database connection pDb.  ^If no prepared statement
+** satisfies the conditions of this routine, it returns NULL.
+**
+** The [database connection] pointer D in a call to
+** [sqlite3_next_stmt(D,S)] must refer to an open database
+** connection and in particular must not be a NULL pointer.
+*/
+sqlite3_stmt* sqlite3_next_stmt(sqlite3* pDb, sqlite3_stmt* pStmt);
+
+/*
+** CAPI3REF: Commit And Rollback Notification Callbacks
+** METHOD: sqlite3
+**
+** ^The sqlite3_commit_hook() interface registers a callback
+** function to be invoked whenever a transaction is [COMMIT | committed].
+** ^Any callback set by a previous call to sqlite3_commit_hook()
+** for the same database connection is overridden.
+** ^The sqlite3_rollback_hook() interface registers a callback
+** function to be invoked whenever a transaction is [ROLLBACK | rolled back].
+** ^Any callback set by a previous call to sqlite3_rollback_hook()
+** for the same database connection is overridden.
+** ^The pArg argument is passed through to the callback.
+** ^If the callback on a commit hook function returns non-zero,
+** then the commit is converted into a rollback.
+**
+** ^The sqlite3_commit_hook(D,C,P) and sqlite3_rollback_hook(D,C,P) functions
+** return the P argument from the previous call of the same function
+** on the same [database connection] D, or NULL for
+** the first call for each function on D.
+**
+** The commit and rollback hook callbacks are not reentrant.
+** The callback implementation must not do anything that will modify
+** the database connection that invoked the callback.  Any actions
+** to modify the database connection must be deferred until after the
+** completion of the [sqlite3_step()] call that triggered the commit
+** or rollback hook in the first place.
+** Note that running any other SQL statements, including SELECT statements,
+** or merely calling [sqlite3_prepare_v2()] and [sqlite3_step()] will modify
+** the database connections for the meaning of "modify" in this paragraph.
+**
+** ^Registering a NULL function disables the callback.
+**
+** ^When the commit hook callback routine returns zero, the [COMMIT]
+** operation is allowed to continue normally.  ^If the commit hook
+** returns non-zero, then the [COMMIT] is converted into a [ROLLBACK].
+** ^The rollback hook is invoked on a rollback that results from a commit
+** hook returning non-zero, just as it would be with any other rollback.
+**
+** ^For the purposes of this API, a transaction is said to have been
+** rolled back if an explicit "ROLLBACK" statement is executed, or
+** an error or constraint causes an implicit rollback to occur.
+** ^The rollback callback is not invoked if a transaction is
+** automatically rolled back because the database connection is closed.
+**
+** See also the [sqlite3_update_hook()] interface.
+*/
+void* sqlite3_commit_hook(sqlite3*, int function(void*), void*);
+void* sqlite3_rollback_hook(sqlite3*, void function(void*), void*);
+
+/*
+** CAPI3REF: Data Change Notification Callbacks
+** METHOD: sqlite3
+**
+** ^The sqlite3_update_hook() interface registers a callback function
+** with the [database connection] identified by the first argument
+** to be invoked whenever a row is updated, inserted or deleted in
+** a [rowid table].
+** ^Any callback set by a previous call to this function
+** for the same database connection is overridden.
+**
+** ^The second argument is a pointer to the function to invoke when a
+** row is updated, inserted or deleted in a rowid table.
+** ^The first argument to the callback is a copy of the third argument
+** to sqlite3_update_hook().
+** ^The second callback argument is one of [SQLITE_INSERT], [SQLITE_DELETE],
+** or [SQLITE_UPDATE], depending on the operation that caused the callback
+** to be invoked.
+** ^The third and fourth arguments to the callback contain pointers to the
+** database and table name containing the affected row.
+** ^The final callback parameter is the [rowid] of the row.
+** ^In the case of an update, this is the [rowid] after the update takes place.
+**
+** ^(The update hook is not invoked when internal system tables are
+** modified (i.e. sqlite_master and sqlite_sequence).)^
+** ^The update hook is not invoked when [WITHOUT ROWID] tables are modified.
+**
+** ^In the current implementation, the update hook
+** is not invoked when conflicting rows are deleted because of an
+** [ON CONFLICT | ON CONFLICT REPLACE] clause.  ^Nor is the update hook
+** invoked when rows are deleted using the [truncate optimization].
+** The exceptions defined in this paragraph might change in a future
+** release of SQLite.
+**
+** The update hook implementation must not do anything that will modify
+** the database connection that invoked the update hook.  Any actions
+** to modify the database connection must be deferred until after the
+** completion of the [sqlite3_step()] call that triggered the update hook.
+** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
+** database connections for the meaning of "modify" in this paragraph.
+**
+** ^The sqlite3_update_hook(D,C,P) function
+** returns the P argument from the previous call
+** on the same [database connection] D, or NULL for
+** the first call on D.
+**
+** See also the [sqlite3_commit_hook()], [sqlite3_rollback_hook()],
+** and [sqlite3_preupdate_hook()] interfaces.
+*/
+void* sqlite3_update_hook(
+    sqlite3*,
+    void function(void*, int, const(char)*, const(char)*, sqlite3_int64),
+    void*);
+
+/*
+** CAPI3REF: Enable Or Disable Shared Pager Cache
+**
+** ^(This routine enables or disables the sharing of the database cache
+** and schema data structures between [database connection | connections]
+** to the same database. Sharing is enabled if the argument is true
+** and disabled if the argument is false.)^
+**
+** ^Cache sharing is enabled and disabled for an entire process.
+** This is a change as of SQLite [version 3.5.0] ([dateof:3.5.0]).
+** In prior versions of SQLite,
+** sharing was enabled or disabled for each thread separately.
+**
+** ^(The cache sharing mode set by this interface effects all subsequent
+** calls to [sqlite3_open()], [sqlite3_open_v2()], and [sqlite3_open16()].
+** Existing database connections continue use the sharing mode
+** that was in effect at the time they were opened.)^
+**
+** ^(This routine returns [SQLITE_OK] if shared cache was enabled or disabled
+** successfully.  An [error code] is returned otherwise.)^
+**
+** ^Shared cache is disabled by default. But this might change in
+** future releases of SQLite.  Applications that care about shared
+** cache setting should set it explicitly.
+**
+** Note: This method is disabled on MacOS X 10.7 and iOS version 5.0
+** and will always return SQLITE_MISUSE. On those systems,
+** shared cache mode should be enabled per-database connection via
+** [sqlite3_open_v2()] with [SQLITE_OPEN_SHAREDCACHE].
+**
+** This interface is threadsafe on processors where writing a
+** 32-bit integer is atomic.
+**
+** See Also:  [SQLite Shared-Cache Mode]
+*/
+int sqlite3_enable_shared_cache(int);
+
+/*
+** CAPI3REF: Attempt To Free Heap Memory
+**
+** ^The sqlite3_release_memory() interface attempts to free N bytes
+** of heap memory by deallocating non-essential memory allocations
+** held by the database library.   Memory used to cache database
+** pages to improve performance is an example of non-essential memory.
+** ^sqlite3_release_memory() returns the number of bytes actually freed,
+** which might be more or less than the amount requested.
+** ^The sqlite3_release_memory() routine is a no-op returning zero
+** if SQLite is not compiled with [SQLITE_ENABLE_MEMORY_MANAGEMENT].
+**
+** See also: [sqlite3_db_release_memory()]
+*/
+int sqlite3_release_memory(int);
+
+/*
+** CAPI3REF: Free Memory Used By A Database Connection
+** METHOD: sqlite3
+**
+** ^The sqlite3_db_release_memory(D) interface attempts to free as much heap
+** memory as possible from database connection D. Unlike the
+** [sqlite3_release_memory()] interface, this interface is in effect even
+** when the [SQLITE_ENABLE_MEMORY_MANAGEMENT] compile-time option is
+** omitted.
+**
+** See also: [sqlite3_release_memory()]
+*/
+int sqlite3_db_release_memory(sqlite3*);
+
+/*
+** CAPI3REF: Impose A Limit On Heap Size
+**
+** ^The sqlite3_soft_heap_limit64() interface sets and/or queries the
+** soft limit on the amount of heap memory that may be allocated by SQLite.
+** ^SQLite strives to keep heap memory utilization below the soft heap
+** limit by reducing the number of pages held in the page cache
+** as heap memory usages approaches the limit.
+** ^The soft heap limit is "soft" because even though SQLite strives to stay
+** below the limit, it will exceed the limit rather than generate
+** an [SQLITE_NOMEM] error.  In other words, the soft heap limit
+** is advisory only.
+**
+** ^The return value from sqlite3_soft_heap_limit64() is the size of
+** the soft heap limit prior to the call, or negative in the case of an
+** error.  ^If the argument N is negative
+** then no change is made to the soft heap limit.  Hence, the current
+** size of the soft heap limit can be determined by invoking
+** sqlite3_soft_heap_limit64() with a negative argument.
+**
+** ^If the argument N is zero then the soft heap limit is disabled.
+**
+** ^(The soft heap limit is not enforced in the current implementation
+** if one or more of following conditions are true:
+**
+** <ul>
+** <li> The soft heap limit is set to zero.
+** <li> Memory accounting is disabled using a combination of the
+**      [sqlite3_config]([SQLITE_CONFIG_MEMSTATUS],...) start-time option and
+**      the [SQLITE_DEFAULT_MEMSTATUS] compile-time option.
+** <li> An alternative page cache implementation is specified using
+**      [sqlite3_config]([SQLITE_CONFIG_PCACHE2],...).
+** <li> The page cache allocates from its own memory pool supplied
+**      by [sqlite3_config]([SQLITE_CONFIG_PAGECACHE],...) rather than
+**      from the heap.
+** </ul>)^
+**
+** Beginning with SQLite [version 3.7.3] ([dateof:3.7.3]),
+** the soft heap limit is enforced
+** regardless of whether or not the [SQLITE_ENABLE_MEMORY_MANAGEMENT]
+** compile-time option is invoked.  With [SQLITE_ENABLE_MEMORY_MANAGEMENT],
+** the soft heap limit is enforced on every memory allocation.  Without
+** [SQLITE_ENABLE_MEMORY_MANAGEMENT], the soft heap limit is only enforced
+** when memory is allocated by the page cache.  Testing suggests that because
+** the page cache is the predominate memory user in SQLite, most
+** applications will achieve adequate soft heap limit enforcement without
+** the use of [SQLITE_ENABLE_MEMORY_MANAGEMENT].
+**
+** The circumstances under which SQLite will enforce the soft heap limit may
+** changes in future releases of SQLite.
+*/
+sqlite3_int64 sqlite3_soft_heap_limit64(sqlite3_int64 N);
+
+/*
+** CAPI3REF: Deprecated Soft Heap Limit Interface
+** DEPRECATED
+**
+** This is a deprecated version of the [sqlite3_soft_heap_limit64()]
+** interface.  This routine is provided for historical compatibility
+** only.  All new applications should use the
+** [sqlite3_soft_heap_limit64()] interface rather than this one.
+*/
+void sqlite3_soft_heap_limit(int N);
+
+/*
+** CAPI3REF: Extract Metadata About A Column Of A Table
+** METHOD: sqlite3
+**
+** ^(The sqlite3_table_column_metadata(X,D,T,C,....) routine returns
+** information about column C of table T in database D
+** on [database connection] X.)^  ^The sqlite3_table_column_metadata()
+** interface returns SQLITE_OK and fills in the non-NULL pointers in
+** the final five arguments with appropriate values if the specified
+** column exists.  ^The sqlite3_table_column_metadata() interface returns
+** SQLITE_ERROR and if the specified column does not exist.
+** ^If the column-name parameter to sqlite3_table_column_metadata() is a
+** NULL pointer, then this routine simply checks for the existence of the
+** table and returns SQLITE_OK if the table exists and SQLITE_ERROR if it
+** does not.  If the table name parameter T in a call to
+** sqlite3_table_column_metadata(X,D,T,C,...) is NULL then the result is
+** undefined behavior.
+**
+** ^The column is identified by the second, third and fourth parameters to
+** this function. ^(The second parameter is either the name of the database
+** (i.e. "main", "temp", or an attached database) containing the specified
+** table or NULL.)^ ^If it is NULL, then all attached databases are searched
+** for the table using the same algorithm used by the database engine to
+** resolve unqualified table references.
+**
+** ^The third and fourth parameters to this function are the table and column
+** name of the desired column, respectively.
+**
+** ^Metadata is returned by writing to the memory locations passed as the 5th
+** and subsequent parameters to this function. ^Any of these arguments may be
+** NULL, in which case the corresponding element of metadata is omitted.
+**
+** ^(<blockquote>
+** <table border="1">
+** <tr><th> Parameter <th> Output<br>Type <th>  Description
+**
+** <tr><td> 5th <td> const char* <td> Data type
+** <tr><td> 6th <td> const char* <td> Name of default collation sequence
+** <tr><td> 7th <td> int         <td> True if column has a NOT NULL constraint
+** <tr><td> 8th <td> int         <td> True if column is part of the PRIMARY KEY
+** <tr><td> 9th <td> int         <td> True if column is [AUTOINCREMENT]
+** </table>
+** </blockquote>)^
+**
+** ^The memory pointed to by the character pointers returned for the
+** declaration type and collation sequence is valid until the next
+** call to any SQLite API function.
+**
+** ^If the specified table is actually a view, an [error code] is returned.
+**
+** ^If the specified column is "rowid", "oid" or "_rowid_" and the table
+** is not a [WITHOUT ROWID] table and an
+** [INTEGER PRIMARY KEY] column has been explicitly declared, then the output
+** parameters are set for the explicitly declared column. ^(If there is no
+** [INTEGER PRIMARY KEY] column, then the outputs
+** for the [rowid] are set as follows:
+**
+** <pre>
+**     data type: "INTEGER"
+**     collation sequence: "BINARY"
+**     not null: 0
+**     primary key: 1
+**     auto increment: 0
+** </pre>)^
+**
+** ^This function causes all database schemas to be read from disk and
+** parsed, if that has not already been done, and returns an error if
+** any errors are encountered while loading the schema.
+*/
+/* Connection handle */
+/* Database name or NULL */
+/* Table name */
+/* Column name */
+/* OUTPUT: Declared data type */
+/* OUTPUT: Collation sequence name */
+/* OUTPUT: True if NOT NULL constraint exists */
+/* OUTPUT: True if column part of PK */
+/* OUTPUT: True if column is auto-increment */
+int sqlite3_table_column_metadata(
+    sqlite3* db,
+    const(char)* zDbName,
+    const(char)* zTableName,
+    const(char)* zColumnName,
+    const(char*)* pzDataType,
+    const(char*)* pzCollSeq,
+    int* pNotNull,
+    int* pPrimaryKey,
+    int* pAutoinc);
+
+/*
+** CAPI3REF: Load An Extension
+** METHOD: sqlite3
+**
+** ^This interface loads an SQLite extension library from the named file.
+**
+** ^The sqlite3_load_extension() interface attempts to load an
+** [SQLite extension] library contained in the file zFile.  If
+** the file cannot be loaded directly, attempts are made to load
+** with various operating-system specific extensions added.
+** So for example, if "samplelib" cannot be loaded, then names like
+** "samplelib.so" or "samplelib.dylib" or "samplelib.dll" might
+** be tried also.
+**
+** ^The entry point is zProc.
+** ^(zProc may be 0, in which case SQLite will try to come up with an
+** entry point name on its own.  It first tries "sqlite3_extension_init".
+** If that does not work, it constructs a name "sqlite3_X_init" where the
+** X is consists of the lower-case equivalent of all ASCII alphabetic
+** characters in the filename from the last "/" to the first following
+** "." and omitting any initial "lib".)^
+** ^The sqlite3_load_extension() interface returns
+** [SQLITE_OK] on success and [SQLITE_ERROR] if something goes wrong.
+** ^If an error occurs and pzErrMsg is not 0, then the
+** [sqlite3_load_extension()] interface shall attempt to
+** fill *pzErrMsg with error message text stored in memory
+** obtained from [sqlite3_malloc()]. The calling function
+** should free this memory by calling [sqlite3_free()].
+**
+** ^Extension loading must be enabled using
+** [sqlite3_enable_load_extension()] or
+** [sqlite3_db_config](db,[SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION],1,NULL)
+** prior to calling this API,
+** otherwise an error will be returned.
+**
+** <b>Security warning:</b> It is recommended that the
+** [SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION] method be used to enable only this
+** interface.  The use of the [sqlite3_enable_load_extension()] interface
+** should be avoided.  This will keep the SQL function [load_extension()]
+** disabled and prevent SQL injections from giving attackers
+** access to extension loading capabilities.
+**
+** See also the [load_extension() SQL function].
+*/
+/* Load the extension into this database connection */
+/* Name of the shared library containing extension */
+/* Entry point.  Derived from zFile if 0 */
+/* Put error message here if not 0 */
+int sqlite3_load_extension(
+    sqlite3* db,
+    const(char)* zFile,
+    const(char)* zProc,
+    char** pzErrMsg);
+
+/*
+** CAPI3REF: Enable Or Disable Extension Loading
+** METHOD: sqlite3
+**
+** ^So as not to open security holes in older applications that are
+** unprepared to deal with [extension loading], and as a means of disabling
+** [extension loading] while evaluating user-entered SQL, the following API
+** is provided to turn the [sqlite3_load_extension()] mechanism on and off.
+**
+** ^Extension loading is off by default.
+** ^Call the sqlite3_enable_load_extension() routine with onoff==1
+** to turn extension loading on and call it with onoff==0 to turn
+** it back off again.
+**
+** ^This interface enables or disables both the C-API
+** [sqlite3_load_extension()] and the SQL function [load_extension()].
+** ^(Use [sqlite3_db_config](db,[SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION],..)
+** to enable or disable only the C-API.)^
+**
+** <b>Security warning:</b> It is recommended that extension loading
+** be disabled using the [SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION] method
+** rather than this interface, so the [load_extension()] SQL function
+** remains disabled. This will prevent SQL injections from giving attackers
+** access to extension loading capabilities.
+*/
+int sqlite3_enable_load_extension(sqlite3* db, int onoff);
+
+/*
+** CAPI3REF: Automatically Load Statically Linked Extensions
+**
+** ^This interface causes the xEntryPoint() function to be invoked for
+** each new [database connection] that is created.  The idea here is that
+** xEntryPoint() is the entry point for a statically linked [SQLite extension]
+** that is to be automatically loaded into all new database connections.
+**
+** ^(Even though the function prototype shows that xEntryPoint() takes
+** no arguments and returns void, SQLite invokes xEntryPoint() with three
+** arguments and expects an integer result as if the signature of the
+** entry point where as follows:
+**
+** <blockquote><pre>
+** &nbsp;  int xEntryPoint(
+** &nbsp;    sqlite3 *db,
+** &nbsp;    const char **pzErrMsg,
+** &nbsp;    const struct sqlite3_api_routines *pThunk
+** &nbsp;  );
+** </pre></blockquote>)^
+**
+** If the xEntryPoint routine encounters an error, it should make *pzErrMsg
+** point to an appropriate error message (obtained from [sqlite3_mprintf()])
+** and return an appropriate [error code].  ^SQLite ensures that *pzErrMsg
+** is NULL before calling the xEntryPoint().  ^SQLite will invoke
+** [sqlite3_free()] on *pzErrMsg after xEntryPoint() returns.  ^If any
+** xEntryPoint() returns an error, the [sqlite3_open()], [sqlite3_open16()],
+** or [sqlite3_open_v2()] call that provoked the xEntryPoint() will fail.
+**
+** ^Calling sqlite3_auto_extension(X) with an entry point X that is already
+** on the list of automatic extensions is a harmless no-op. ^No entry point
+** will be called more than once for each database connection that is opened.
+**
+** See also: [sqlite3_reset_auto_extension()]
+** and [sqlite3_cancel_auto_extension()]
+*/
+int sqlite3_auto_extension(void function() xEntryPoint);
+
+/*
+** CAPI3REF: Cancel Automatic Extension Loading
+**
+** ^The [sqlite3_cancel_auto_extension(X)] interface unregisters the
+** initialization routine X that was registered using a prior call to
+** [sqlite3_auto_extension(X)].  ^The [sqlite3_cancel_auto_extension(X)]
+** routine returns 1 if initialization routine X was successfully
+** unregistered and it returns 0 if X was not on the list of initialization
+** routines.
+*/
+int sqlite3_cancel_auto_extension(void function() xEntryPoint);
+
+/*
+** CAPI3REF: Reset Automatic Extension Loading
+**
+** ^This interface disables all automatic extensions previously
+** registered using [sqlite3_auto_extension()].
+*/
+void sqlite3_reset_auto_extension();
+
+/*
+** The interface to the virtual-table mechanism is currently considered
+** to be experimental.  The interface might change in incompatible ways.
+** If this is a problem for you, do not use the interface at this time.
+**
+** When the virtual-table mechanism stabilizes, we will declare the
+** interface fixed, support it indefinitely, and remove this comment.
+*/
+
+/*
+** Structures used by the virtual table interface
+*/
+
+/*
+** CAPI3REF: Virtual Table Object
+** KEYWORDS: sqlite3_module {virtual table module}
+**
+** This structure, sometimes called a "virtual table module",
+** defines the implementation of a [virtual tables].
+** This structure consists mostly of methods for the module.
+**
+** ^A virtual table module is created by filling in a persistent
+** instance of this structure and passing a pointer to that instance
+** to [sqlite3_create_module()] or [sqlite3_create_module_v2()].
+** ^The registration remains valid until it is replaced by a different
+** module or until the [database connection] closes.  The content
+** of this structure must not change while it is registered with
+** any database connection.
+*/
+struct sqlite3_module
+{
+    int iVersion;
+    int function(sqlite3*, void* pAux, int argc, const(char*)* argv, sqlite3_vtab** ppVTab, char**) xCreate;
+    int function(sqlite3*, void* pAux, int argc, const(char*)* argv, sqlite3_vtab** ppVTab, char**) xConnect;
+    int function(sqlite3_vtab* pVTab, sqlite3_index_info*) xBestIndex;
+    int function(sqlite3_vtab* pVTab) xDisconnect;
+    int function(sqlite3_vtab* pVTab) xDestroy;
+    int function(sqlite3_vtab* pVTab, sqlite3_vtab_cursor** ppCursor) xOpen;
+    int function(sqlite3_vtab_cursor*) xClose;
+    int function(sqlite3_vtab_cursor*, int idxNum, const(char)* idxStr, int argc, sqlite3_value** argv) xFilter;
+    int function(sqlite3_vtab_cursor*) xNext;
+    int function(sqlite3_vtab_cursor*) xEof;
+    int function(sqlite3_vtab_cursor*, sqlite3_context*, int) xColumn;
+    int function(sqlite3_vtab_cursor*, sqlite3_int64* pRowid) xRowid;
+    int function(sqlite3_vtab*, int, sqlite3_value**, sqlite3_int64*) xUpdate;
+    int function(sqlite3_vtab* pVTab) xBegin;
+    int function(sqlite3_vtab* pVTab) xSync;
+    int function(sqlite3_vtab* pVTab) xCommit;
+    int function(sqlite3_vtab* pVTab) xRollback;
+    int function(sqlite3_vtab* pVtab, int nArg, const(char)* zName, void function(sqlite3_context*, int, sqlite3_value**)* pxFunc, void** ppArg) xFindFunction;
+    int function(sqlite3_vtab* pVtab, const(char)* zNew) xRename;
+    /* The methods above are in version 1 of the sqlite_module object. Those
+    ** below are for version 2 and greater. */
+    int function(sqlite3_vtab* pVTab, int) xSavepoint;
+    int function(sqlite3_vtab* pVTab, int) xRelease;
+    int function(sqlite3_vtab* pVTab, int) xRollbackTo;
+}
+
+/*
+** CAPI3REF: Virtual Table Indexing Information
+** KEYWORDS: sqlite3_index_info
+**
+** The sqlite3_index_info structure and its substructures is used as part
+** of the [virtual table] interface to
+** pass information into and receive the reply from the [xBestIndex]
+** method of a [virtual table module].  The fields under **Inputs** are the
+** inputs to xBestIndex and are read-only.  xBestIndex inserts its
+** results into the **Outputs** fields.
+**
+** ^(The aConstraint[] array records WHERE clause constraints of the form:
+**
+** <blockquote>column OP expr</blockquote>
+**
+** where OP is =, &lt;, &lt;=, &gt;, or &gt;=.)^  ^(The particular operator is
+** stored in aConstraint[].op using one of the
+** [SQLITE_INDEX_CONSTRAINT_EQ | SQLITE_INDEX_CONSTRAINT_ values].)^
+** ^(The index of the column is stored in
+** aConstraint[].iColumn.)^  ^(aConstraint[].usable is TRUE if the
+** expr on the right-hand side can be evaluated (and thus the constraint
+** is usable) and false if it cannot.)^
+**
+** ^The optimizer automatically inverts terms of the form "expr OP column"
+** and makes other simplifications to the WHERE clause in an attempt to
+** get as many WHERE clause terms into the form shown above as possible.
+** ^The aConstraint[] array only reports WHERE clause terms that are
+** relevant to the particular virtual table being queried.
+**
+** ^Information about the ORDER BY clause is stored in aOrderBy[].
+** ^Each term of aOrderBy records a column of the ORDER BY clause.
+**
+** The colUsed field indicates which columns of the virtual table may be
+** required by the current scan. Virtual table columns are numbered from
+** zero in the order in which they appear within the CREATE TABLE statement
+** passed to sqlite3_declare_vtab(). For the first 63 columns (columns 0-62),
+** the corresponding bit is set within the colUsed mask if the column may be
+** required by SQLite. If the table has at least 64 columns and any column
+** to the right of the first 63 is required, then bit 63 of colUsed is also
+** set. In other words, column iCol may be required if the expression
+** (colUsed & ((sqlite3_uint64)1 << (iCol>=63 ? 63 : iCol))) evaluates to
+** non-zero.
+**
+** The [xBestIndex] method must fill aConstraintUsage[] with information
+** about what parameters to pass to xFilter.  ^If argvIndex>0 then
+** the right-hand side of the corresponding aConstraint[] is evaluated
+** and becomes the argvIndex-th entry in argv.  ^(If aConstraintUsage[].omit
+** is true, then the constraint is assumed to be fully handled by the
+** virtual table and is not checked again by SQLite.)^
+**
+** ^The idxNum and idxPtr values are recorded and passed into the
+** [xFilter] method.
+** ^[sqlite3_free()] is used to free idxPtr if and only if
+** needToFreeIdxPtr is true.
+**
+** ^The orderByConsumed means that output from [xFilter]/[xNext] will occur in
+** the correct order to satisfy the ORDER BY clause so that no separate
+** sorting step is required.
+**
+** ^The estimatedCost value is an estimate of the cost of a particular
+** strategy. A cost of N indicates that the cost of the strategy is similar
+** to a linear scan of an SQLite table with N rows. A cost of log(N)
+** indicates that the expense of the operation is similar to that of a
+** binary search on a unique indexed field of an SQLite table with N rows.
+**
+** ^The estimatedRows value is an estimate of the number of rows that
+** will be returned by the strategy.
+**
+** The xBestIndex method may optionally populate the idxFlags field with a
+** mask of SQLITE_INDEX_SCAN_* flags. Currently there is only one such flag -
+** SQLITE_INDEX_SCAN_UNIQUE. If the xBestIndex method sets this flag, SQLite
+** assumes that the strategy may visit at most one row.
+**
+** Additionally, if xBestIndex sets the SQLITE_INDEX_SCAN_UNIQUE flag, then
+** SQLite also assumes that if a call to the xUpdate() method is made as
+** part of the same statement to delete or update a virtual table row and the
+** implementation returns SQLITE_CONSTRAINT, then there is no need to rollback
+** any database changes. In other words, if the xUpdate() returns
+** SQLITE_CONSTRAINT, the database contents must be exactly as they were
+** before xUpdate was called. By contrast, if SQLITE_INDEX_SCAN_UNIQUE is not
+** set and xUpdate returns SQLITE_CONSTRAINT, any database changes made by
+** the xUpdate method are automatically rolled back by SQLite.
+**
+** IMPORTANT: The estimatedRows field was added to the sqlite3_index_info
+** structure for SQLite [version 3.8.2] ([dateof:3.8.2]).
+** If a virtual table extension is
+** used with an SQLite version earlier than 3.8.2, the results of attempting
+** to read or write the estimatedRows field are undefined (but are likely
+** to included crashing the application). The estimatedRows field should
+** therefore only be used if [sqlite3_libversion_number()] returns a
+** value greater than or equal to 3008002. Similarly, the idxFlags field
+** was added for [version 3.9.0] ([dateof:3.9.0]).
+** It may therefore only be used if
+** sqlite3_libversion_number() returns a value greater than or equal to
+** 3009000.
+*/
+struct sqlite3_index_info
+{
+    /* Inputs */
+    int nConstraint; /* Number of entries in aConstraint */
+
+    /* Column constrained.  -1 for ROWID */
+    /* Constraint operator */
+    /* True if this constraint is usable */
+    /* Used internally - xBestIndex should ignore */
+    struct sqlite3_index_constraint
+    {
+        int iColumn;
+        ubyte op;
+        ubyte usable;
+        int iTermOffset;
+    }
+
+    sqlite3_index_constraint* aConstraint; /* Table of WHERE clause constraints */
+    int nOrderBy; /* Number of terms in the ORDER BY clause */
+
+    /* Column number */
+    /* True for DESC.  False for ASC. */
+    struct sqlite3_index_orderby
+    {
+        int iColumn;
+        ubyte desc;
+    }
+
+    sqlite3_index_orderby* aOrderBy; /* The ORDER BY clause */
+    /* Outputs */
+
+    /* if >0, constraint is part of argv to xFilter */
+    /* Do not code a test for this constraint */
+    struct sqlite3_index_constraint_usage
+    {
+        int argvIndex;
+        ubyte omit;
+    }
+
+    sqlite3_index_constraint_usage* aConstraintUsage;
+    int idxNum; /* Number used to identify the index */
+    char* idxStr; /* String, possibly obtained from sqlite3_malloc */
+    int needToFreeIdxStr; /* Free idxStr using sqlite3_free() if true */
+    int orderByConsumed; /* True if output is already ordered */
+    double estimatedCost; /* Estimated cost of using this index */
+    /* Fields below are only available in SQLite 3.8.2 and later */
+    sqlite3_int64 estimatedRows; /* Estimated number of rows returned */
+    /* Fields below are only available in SQLite 3.9.0 and later */
+    int idxFlags; /* Mask of SQLITE_INDEX_SCAN_* flags */
+    /* Fields below are only available in SQLite 3.10.0 and later */
+    sqlite3_uint64 colUsed; /* Input: Mask of columns used by statement */
+}
+
+/*
+** CAPI3REF: Virtual Table Scan Flags
+**
+** Virtual table implementations are allowed to set the
+** [sqlite3_index_info].idxFlags field to some combination of
+** these bits.
+*/
+enum SQLITE_INDEX_SCAN_UNIQUE = 1; /* Scan visits at most 1 row */
+
+/*
+** CAPI3REF: Virtual Table Constraint Operator Codes
+**
+** These macros defined the allowed values for the
+** [sqlite3_index_info].aConstraint[].op field.  Each value represents
+** an operator that is part of a constraint term in the wHERE clause of
+** a query that uses a [virtual table].
+*/
+enum SQLITE_INDEX_CONSTRAINT_EQ = 2;
+enum SQLITE_INDEX_CONSTRAINT_GT = 4;
+enum SQLITE_INDEX_CONSTRAINT_LE = 8;
+enum SQLITE_INDEX_CONSTRAINT_LT = 16;
+enum SQLITE_INDEX_CONSTRAINT_GE = 32;
+enum SQLITE_INDEX_CONSTRAINT_MATCH = 64;
+enum SQLITE_INDEX_CONSTRAINT_LIKE = 65;
+enum SQLITE_INDEX_CONSTRAINT_GLOB = 66;
+enum SQLITE_INDEX_CONSTRAINT_REGEXP = 67;
+enum SQLITE_INDEX_CONSTRAINT_NE = 68;
+enum SQLITE_INDEX_CONSTRAINT_ISNOT = 69;
+enum SQLITE_INDEX_CONSTRAINT_ISNOTNULL = 70;
+enum SQLITE_INDEX_CONSTRAINT_ISNULL = 71;
+enum SQLITE_INDEX_CONSTRAINT_IS = 72;
+enum SQLITE_INDEX_CONSTRAINT_FUNCTION = 150;
+
+/*
+** CAPI3REF: Register A Virtual Table Implementation
+** METHOD: sqlite3
+**
+** ^These routines are used to register a new [virtual table module] name.
+** ^Module names must be registered before
+** creating a new [virtual table] using the module and before using a
+** preexisting [virtual table] for the module.
+**
+** ^The module name is registered on the [database connection] specified
+** by the first parameter.  ^The name of the module is given by the
+** second parameter.  ^The third parameter is a pointer to
+** the implementation of the [virtual table module].   ^The fourth
+** parameter is an arbitrary client data pointer that is passed through
+** into the [xCreate] and [xConnect] methods of the virtual table module
+** when a new virtual table is be being created or reinitialized.
+**
+** ^The sqlite3_create_module_v2() interface has a fifth parameter which
+** is a pointer to a destructor for the pClientData.  ^SQLite will
+** invoke the destructor function (if it is not NULL) when SQLite
+** no longer needs the pClientData pointer.  ^The destructor will also
+** be invoked if the call to sqlite3_create_module_v2() fails.
+** ^The sqlite3_create_module()
+** interface is equivalent to sqlite3_create_module_v2() with a NULL
+** destructor.
+*/
+/* SQLite connection to register module with */
+/* Name of the module */
+/* Methods for the module */
+/* Client data for xCreate/xConnect */
+int sqlite3_create_module(
+    sqlite3* db,
+    const(char)* zName,
+    const(sqlite3_module)* p,
+    void* pClientData);
+
+/* SQLite connection to register module with */
+/* Name of the module */
+/* Methods for the module */
+/* Client data for xCreate/xConnect */
+/* Module destructor function */
+int sqlite3_create_module_v2(
+    sqlite3* db,
+    const(char)* zName,
+    const(sqlite3_module)* p,
+    void* pClientData,
+    void function(void*) xDestroy);
+
+/*
+** CAPI3REF: Virtual Table Instance Object
+** KEYWORDS: sqlite3_vtab
+**
+** Every [virtual table module] implementation uses a subclass
+** of this object to describe a particular instance
+** of the [virtual table].  Each subclass will
+** be tailored to the specific needs of the module implementation.
+** The purpose of this superclass is to define certain fields that are
+** common to all module implementations.
+**
+** ^Virtual tables methods can set an error message by assigning a
+** string obtained from [sqlite3_mprintf()] to zErrMsg.  The method should
+** take care that any prior string is freed by a call to [sqlite3_free()]
+** prior to assigning a new string to zErrMsg.  ^After the error message
+** is delivered up to the client application, the string will be automatically
+** freed by sqlite3_free() and the zErrMsg field will be zeroed.
+*/
+struct sqlite3_vtab
+{
+    const(sqlite3_module)* pModule; /* The module for this virtual table */
+    int nRef; /* Number of open cursors */
+    char* zErrMsg; /* Error message from sqlite3_mprintf() */
+    /* Virtual table implementations will typically add additional fields */
+}
+
+/*
+** CAPI3REF: Virtual Table Cursor Object
+** KEYWORDS: sqlite3_vtab_cursor {virtual table cursor}
+**
+** Every [virtual table module] implementation uses a subclass of the
+** following structure to describe cursors that point into the
+** [virtual table] and are used
+** to loop through the virtual table.  Cursors are created using the
+** [sqlite3_module.xOpen | xOpen] method of the module and are destroyed
+** by the [sqlite3_module.xClose | xClose] method.  Cursors are used
+** by the [xFilter], [xNext], [xEof], [xColumn], and [xRowid] methods
+** of the module.  Each module implementation will define
+** the content of a cursor structure to suit its own needs.
+**
+** This superclass exists in order to define fields of the cursor that
+** are common to all implementations.
+*/
+struct sqlite3_vtab_cursor
+{
+    sqlite3_vtab* pVtab; /* Virtual table of this cursor */
+    /* Virtual table implementations will typically add additional fields */
+}
+
+/*
+** CAPI3REF: Declare The Schema Of A Virtual Table
+**
+** ^The [xCreate] and [xConnect] methods of a
+** [virtual table module] call this interface
+** to declare the format (the names and datatypes of the columns) of
+** the virtual tables they implement.
+*/
+int sqlite3_declare_vtab(sqlite3*, const(char)* zSQL);
+
+/*
+** CAPI3REF: Overload A Function For A Virtual Table
+** METHOD: sqlite3
+**
+** ^(Virtual tables can provide alternative implementations of functions
+** using the [xFindFunction] method of the [virtual table module].
+** But global versions of those functions
+** must exist in order to be overloaded.)^
+**
+** ^(This API makes sure a global version of a function with a particular
+** name and number of parameters exists.  If no such function exists
+** before this API is called, a new function is created.)^  ^The implementation
+** of the new function always causes an exception to be thrown.  So
+** the new function is not good for anything by itself.  Its only
+** purpose is to be a placeholder function that can be overloaded
+** by a [virtual table].
+*/
+int sqlite3_overload_function(sqlite3*, const(char)* zFuncName, int nArg);
+
+/*
+** The interface to the virtual-table mechanism defined above (back up
+** to a comment remarkably similar to this one) is currently considered
+** to be experimental.  The interface might change in incompatible ways.
+** If this is a problem for you, do not use the interface at this time.
+**
+** When the virtual-table mechanism stabilizes, we will declare the
+** interface fixed, support it indefinitely, and remove this comment.
+*/
+
+/*
+** CAPI3REF: A Handle To An Open BLOB
+** KEYWORDS: {BLOB handle} {BLOB handles}
+**
+** An instance of this object represents an open BLOB on which
+** [sqlite3_blob_open | incremental BLOB I/O] can be performed.
+** ^Objects of this type are created by [sqlite3_blob_open()]
+** and destroyed by [sqlite3_blob_close()].
+** ^The [sqlite3_blob_read()] and [sqlite3_blob_write()] interfaces
+** can be used to read or write small subsections of the BLOB.
+** ^The [sqlite3_blob_bytes()] interface returns the size of the BLOB in bytes.
+*/
+struct sqlite3_blob;
+
+/*
+** CAPI3REF: Open A BLOB For Incremental I/O
+** METHOD: sqlite3
+** CONSTRUCTOR: sqlite3_blob
+**
+** ^(This interfaces opens a [BLOB handle | handle] to the BLOB located
+** in row iRow, column zColumn, table zTable in database zDb;
+** in other words, the same BLOB that would be selected by:
+**
+** <pre>
+**     SELECT zColumn FROM zDb.zTable WHERE [rowid] = iRow;
+** </pre>)^
+**
+** ^(Parameter zDb is not the filename that contains the database, but
+** rather the symbolic name of the database. For attached databases, this is
+** the name that appears after the AS keyword in the [ATTACH] statement.
+** For the main database file, the database name is "main". For TEMP
+** tables, the database name is "temp".)^
+**
+** ^If the flags parameter is non-zero, then the BLOB is opened for read
+** and write access. ^If the flags parameter is zero, the BLOB is opened for
+** read-only access.
+**
+** ^(On success, [SQLITE_OK] is returned and the new [BLOB handle] is stored
+** in *ppBlob. Otherwise an [error code] is returned and, unless the error
+** code is SQLITE_MISUSE, *ppBlob is set to NULL.)^ ^This means that, provided
+** the API is not misused, it is always safe to call [sqlite3_blob_close()]
+** on *ppBlob after this function it returns.
+**
+** This function fails with SQLITE_ERROR if any of the following are true:
+** <ul>
+**   <li> ^(Database zDb does not exist)^,
+**   <li> ^(Table zTable does not exist within database zDb)^,
+**   <li> ^(Table zTable is a WITHOUT ROWID table)^,
+**   <li> ^(Column zColumn does not exist)^,
+**   <li> ^(Row iRow is not present in the table)^,
+**   <li> ^(The specified column of row iRow contains a value that is not
+**         a TEXT or BLOB value)^,
+**   <li> ^(Column zColumn is part of an index, PRIMARY KEY or UNIQUE
+**         constraint and the blob is being opened for read/write access)^,
+**   <li> ^([foreign key constraints | Foreign key constraints] are enabled,
+**         column zColumn is part of a [child key] definition and the blob is
+**         being opened for read/write access)^.
+** </ul>
+**
+** ^Unless it returns SQLITE_MISUSE, this function sets the
+** [database connection] error code and message accessible via
+** [sqlite3_errcode()] and [sqlite3_errmsg()] and related functions.
+**
+** A BLOB referenced by sqlite3_blob_open() may be read using the
+** [sqlite3_blob_read()] interface and modified by using
+** [sqlite3_blob_write()].  The [BLOB handle] can be moved to a
+** different row of the same table using the [sqlite3_blob_reopen()]
+** interface.  However, the column, table, or database of a [BLOB handle]
+** cannot be changed after the [BLOB handle] is opened.
+**
+** ^(If the row that a BLOB handle points to is modified by an
+** [UPDATE], [DELETE], or by [ON CONFLICT] side-effects
+** then the BLOB handle is marked as "expired".
+** This is true if any column of the row is changed, even a column
+** other than the one the BLOB handle is open on.)^
+** ^Calls to [sqlite3_blob_read()] and [sqlite3_blob_write()] for
+** an expired BLOB handle fail with a return code of [SQLITE_ABORT].
+** ^(Changes written into a BLOB prior to the BLOB expiring are not
+** rolled back by the expiration of the BLOB.  Such changes will eventually
+** commit if the transaction continues to completion.)^
+**
+** ^Use the [sqlite3_blob_bytes()] interface to determine the size of
+** the opened blob.  ^The size of a blob may not be changed by this
+** interface.  Use the [UPDATE] SQL command to change the size of a
+** blob.
+**
+** ^The [sqlite3_bind_zeroblob()] and [sqlite3_result_zeroblob()] interfaces
+** and the built-in [zeroblob] SQL function may be used to create a
+** zero-filled blob to read or write using the incremental-blob interface.
+**
+** To avoid a resource leak, every open [BLOB handle] should eventually
+** be released by a call to [sqlite3_blob_close()].
+**
+** See also: [sqlite3_blob_close()],
+** [sqlite3_blob_reopen()], [sqlite3_blob_read()],
+** [sqlite3_blob_bytes()], [sqlite3_blob_write()].
+*/
+int sqlite3_blob_open(
+    sqlite3*,
+    const(char)* zDb,
+    const(char)* zTable,
+    const(char)* zColumn,
+    sqlite3_int64 iRow,
+    int flags,
+    sqlite3_blob** ppBlob);
+
+/*
+** CAPI3REF: Move a BLOB Handle to a New Row
+** METHOD: sqlite3_blob
+**
+** ^This function is used to move an existing [BLOB handle] so that it points
+** to a different row of the same database table. ^The new row is identified
+** by the rowid value passed as the second argument. Only the row can be
+** changed. ^The database, table and column on which the blob handle is open
+** remain the same. Moving an existing [BLOB handle] to a new row is
+** faster than closing the existing handle and opening a new one.
+**
+** ^(The new row must meet the same criteria as for [sqlite3_blob_open()] -
+** it must exist and there must be either a blob or text value stored in
+** the nominated column.)^ ^If the new row is not present in the table, or if
+** it does not contain a blob or text value, or if another error occurs, an
+** SQLite error code is returned and the blob handle is considered aborted.
+** ^All subsequent calls to [sqlite3_blob_read()], [sqlite3_blob_write()] or
+** [sqlite3_blob_reopen()] on an aborted blob handle immediately return
+** SQLITE_ABORT. ^Calling [sqlite3_blob_bytes()] on an aborted blob handle
+** always returns zero.
+**
+** ^This function sets the database handle error code and message.
+*/
+int sqlite3_blob_reopen(sqlite3_blob*, sqlite3_int64);
+
+/*
+** CAPI3REF: Close A BLOB Handle
+** DESTRUCTOR: sqlite3_blob
+**
+** ^This function closes an open [BLOB handle]. ^(The BLOB handle is closed
+** unconditionally.  Even if this routine returns an error code, the
+** handle is still closed.)^
+**
+** ^If the blob handle being closed was opened for read-write access, and if
+** the database is in auto-commit mode and there are no other open read-write
+** blob handles or active write statements, the current transaction is
+** committed. ^If an error occurs while committing the transaction, an error
+** code is returned and the transaction rolled back.
+**
+** Calling this function with an argument that is not a NULL pointer or an
+** open blob handle results in undefined behaviour. ^Calling this routine
+** with a null pointer (such as would be returned by a failed call to
+** [sqlite3_blob_open()]) is a harmless no-op. ^Otherwise, if this function
+** is passed a valid open blob handle, the values returned by the
+** sqlite3_errcode() and sqlite3_errmsg() functions are set before returning.
+*/
+int sqlite3_blob_close(sqlite3_blob*);
+
+/*
+** CAPI3REF: Return The Size Of An Open BLOB
+** METHOD: sqlite3_blob
+**
+** ^Returns the size in bytes of the BLOB accessible via the
+** successfully opened [BLOB handle] in its only argument.  ^The
+** incremental blob I/O routines can only read or overwriting existing
+** blob content; they cannot change the size of a blob.
+**
+** This routine only works on a [BLOB handle] which has been created
+** by a prior successful call to [sqlite3_blob_open()] and which has not
+** been closed by [sqlite3_blob_close()].  Passing any other pointer in
+** to this routine results in undefined and probably undesirable behavior.
+*/
+int sqlite3_blob_bytes(sqlite3_blob*);
+
+/*
+** CAPI3REF: Read Data From A BLOB Incrementally
+** METHOD: sqlite3_blob
+**
+** ^(This function is used to read data from an open [BLOB handle] into a
+** caller-supplied buffer. N bytes of data are copied into buffer Z
+** from the open BLOB, starting at offset iOffset.)^
+**
+** ^If offset iOffset is less than N bytes from the end of the BLOB,
+** [SQLITE_ERROR] is returned and no data is read.  ^If N or iOffset is
+** less than zero, [SQLITE_ERROR] is returned and no data is read.
+** ^The size of the blob (and hence the maximum value of N+iOffset)
+** can be determined using the [sqlite3_blob_bytes()] interface.
+**
+** ^An attempt to read from an expired [BLOB handle] fails with an
+** error code of [SQLITE_ABORT].
+**
+** ^(On success, sqlite3_blob_read() returns SQLITE_OK.
+** Otherwise, an [error code] or an [extended error code] is returned.)^
+**
+** This routine only works on a [BLOB handle] which has been created
+** by a prior successful call to [sqlite3_blob_open()] and which has not
+** been closed by [sqlite3_blob_close()].  Passing any other pointer in
+** to this routine results in undefined and probably undesirable behavior.
+**
+** See also: [sqlite3_blob_write()].
+*/
+int sqlite3_blob_read(sqlite3_blob*, void* Z, int N, int iOffset);
+
+/*
+** CAPI3REF: Write Data Into A BLOB Incrementally
+** METHOD: sqlite3_blob
+**
+** ^(This function is used to write data into an open [BLOB handle] from a
+** caller-supplied buffer. N bytes of data are copied from the buffer Z
+** into the open BLOB, starting at offset iOffset.)^
+**
+** ^(On success, sqlite3_blob_write() returns SQLITE_OK.
+** Otherwise, an  [error code] or an [extended error code] is returned.)^
+** ^Unless SQLITE_MISUSE is returned, this function sets the
+** [database connection] error code and message accessible via
+** [sqlite3_errcode()] and [sqlite3_errmsg()] and related functions.
+**
+** ^If the [BLOB handle] passed as the first argument was not opened for
+** writing (the flags parameter to [sqlite3_blob_open()] was zero),
+** this function returns [SQLITE_READONLY].
+**
+** This function may only modify the contents of the BLOB; it is
+** not possible to increase the size of a BLOB using this API.
+** ^If offset iOffset is less than N bytes from the end of the BLOB,
+** [SQLITE_ERROR] is returned and no data is written. The size of the
+** BLOB (and hence the maximum value of N+iOffset) can be determined
+** using the [sqlite3_blob_bytes()] interface. ^If N or iOffset are less
+** than zero [SQLITE_ERROR] is returned and no data is written.
+**
+** ^An attempt to write to an expired [BLOB handle] fails with an
+** error code of [SQLITE_ABORT].  ^Writes to the BLOB that occurred
+** before the [BLOB handle] expired are not rolled back by the
+** expiration of the handle, though of course those changes might
+** have been overwritten by the statement that expired the BLOB handle
+** or by other independent statements.
+**
+** This routine only works on a [BLOB handle] which has been created
+** by a prior successful call to [sqlite3_blob_open()] and which has not
+** been closed by [sqlite3_blob_close()].  Passing any other pointer in
+** to this routine results in undefined and probably undesirable behavior.
+**
+** See also: [sqlite3_blob_read()].
+*/
+int sqlite3_blob_write(sqlite3_blob*, const(void)* z, int n, int iOffset);
+
+/*
+** CAPI3REF: Virtual File System Objects
+**
+** A virtual filesystem (VFS) is an [sqlite3_vfs] object
+** that SQLite uses to interact
+** with the underlying operating system.  Most SQLite builds come with a
+** single default VFS that is appropriate for the host computer.
+** New VFSes can be registered and existing VFSes can be unregistered.
+** The following interfaces are provided.
+**
+** ^The sqlite3_vfs_find() interface returns a pointer to a VFS given its name.
+** ^Names are case sensitive.
+** ^Names are zero-terminated UTF-8 strings.
+** ^If there is no match, a NULL pointer is returned.
+** ^If zVfsName is NULL then the default VFS is returned.
+**
+** ^New VFSes are registered with sqlite3_vfs_register().
+** ^Each new VFS becomes the default VFS if the makeDflt flag is set.
+** ^The same VFS can be registered multiple times without injury.
+** ^To make an existing VFS into the default VFS, register it again
+** with the makeDflt flag set.  If two different VFSes with the
+** same name are registered, the behavior is undefined.  If a
+** VFS is registered with a name that is NULL or an empty string,
+** then the behavior is undefined.
+**
+** ^Unregister a VFS with the sqlite3_vfs_unregister() interface.
+** ^(If the default VFS is unregistered, another VFS is chosen as
+** the default.  The choice for the new VFS is arbitrary.)^
+*/
+sqlite3_vfs* sqlite3_vfs_find(const(char)* zVfsName);
+int sqlite3_vfs_register(sqlite3_vfs*, int makeDflt);
+int sqlite3_vfs_unregister(sqlite3_vfs*);
+
+/*
+** CAPI3REF: Mutexes
+**
+** The SQLite core uses these routines for thread
+** synchronization. Though they are intended for internal
+** use by SQLite, code that links against SQLite is
+** permitted to use any of these routines.
+**
+** The SQLite source code contains multiple implementations
+** of these mutex routines.  An appropriate implementation
+** is selected automatically at compile-time.  The following
+** implementations are available in the SQLite core:
+**
+** <ul>
+** <li>   SQLITE_MUTEX_PTHREADS
+** <li>   SQLITE_MUTEX_W32
+** <li>   SQLITE_MUTEX_NOOP
+** </ul>
+**
+** The SQLITE_MUTEX_NOOP implementation is a set of routines
+** that does no real locking and is appropriate for use in
+** a single-threaded application.  The SQLITE_MUTEX_PTHREADS and
+** SQLITE_MUTEX_W32 implementations are appropriate for use on Unix
+** and Windows.
+**
+** If SQLite is compiled with the SQLITE_MUTEX_APPDEF preprocessor
+** macro defined (with "-DSQLITE_MUTEX_APPDEF=1"), then no mutex
+** implementation is included with the library. In this case the
+** application must supply a custom mutex implementation using the
+** [SQLITE_CONFIG_MUTEX] option of the sqlite3_config() function
+** before calling sqlite3_initialize() or any other public sqlite3_
+** function that calls sqlite3_initialize().
+**
+** ^The sqlite3_mutex_alloc() routine allocates a new
+** mutex and returns a pointer to it. ^The sqlite3_mutex_alloc()
+** routine returns NULL if it is unable to allocate the requested
+** mutex.  The argument to sqlite3_mutex_alloc() must one of these
+** integer constants:
+**
+** <ul>
+** <li>  SQLITE_MUTEX_FAST
+** <li>  SQLITE_MUTEX_RECURSIVE
+** <li>  SQLITE_MUTEX_STATIC_MASTER
+** <li>  SQLITE_MUTEX_STATIC_MEM
+** <li>  SQLITE_MUTEX_STATIC_OPEN
+** <li>  SQLITE_MUTEX_STATIC_PRNG
+** <li>  SQLITE_MUTEX_STATIC_LRU
+** <li>  SQLITE_MUTEX_STATIC_PMEM
+** <li>  SQLITE_MUTEX_STATIC_APP1
+** <li>  SQLITE_MUTEX_STATIC_APP2
+** <li>  SQLITE_MUTEX_STATIC_APP3
+** <li>  SQLITE_MUTEX_STATIC_VFS1
+** <li>  SQLITE_MUTEX_STATIC_VFS2
+** <li>  SQLITE_MUTEX_STATIC_VFS3
+** </ul>
+**
+** ^The first two constants (SQLITE_MUTEX_FAST and SQLITE_MUTEX_RECURSIVE)
+** cause sqlite3_mutex_alloc() to create
+** a new mutex.  ^The new mutex is recursive when SQLITE_MUTEX_RECURSIVE
+** is used but not necessarily so when SQLITE_MUTEX_FAST is used.
+** The mutex implementation does not need to make a distinction
+** between SQLITE_MUTEX_RECURSIVE and SQLITE_MUTEX_FAST if it does
+** not want to.  SQLite will only request a recursive mutex in
+** cases where it really needs one.  If a faster non-recursive mutex
+** implementation is available on the host platform, the mutex subsystem
+** might return such a mutex in response to SQLITE_MUTEX_FAST.
+**
+** ^The other allowed parameters to sqlite3_mutex_alloc() (anything other
+** than SQLITE_MUTEX_FAST and SQLITE_MUTEX_RECURSIVE) each return
+** a pointer to a static preexisting mutex.  ^Nine static mutexes are
+** used by the current version of SQLite.  Future versions of SQLite
+** may add additional static mutexes.  Static mutexes are for internal
+** use by SQLite only.  Applications that use SQLite mutexes should
+** use only the dynamic mutexes returned by SQLITE_MUTEX_FAST or
+** SQLITE_MUTEX_RECURSIVE.
+**
+** ^Note that if one of the dynamic mutex parameters (SQLITE_MUTEX_FAST
+** or SQLITE_MUTEX_RECURSIVE) is used then sqlite3_mutex_alloc()
+** returns a different mutex on every call.  ^For the static
+** mutex types, the same mutex is returned on every call that has
+** the same type number.
+**
+** ^The sqlite3_mutex_free() routine deallocates a previously
+** allocated dynamic mutex.  Attempting to deallocate a static
+** mutex results in undefined behavior.
+**
+** ^The sqlite3_mutex_enter() and sqlite3_mutex_try() routines attempt
+** to enter a mutex.  ^If another thread is already within the mutex,
+** sqlite3_mutex_enter() will block and sqlite3_mutex_try() will return
+** SQLITE_BUSY.  ^The sqlite3_mutex_try() interface returns [SQLITE_OK]
+** upon successful entry.  ^(Mutexes created using
+** SQLITE_MUTEX_RECURSIVE can be entered multiple times by the same thread.
+** In such cases, the
+** mutex must be exited an equal number of times before another thread
+** can enter.)^  If the same thread tries to enter any mutex other
+** than an SQLITE_MUTEX_RECURSIVE more than once, the behavior is undefined.
+**
+** ^(Some systems (for example, Windows 95) do not support the operation
+** implemented by sqlite3_mutex_try().  On those systems, sqlite3_mutex_try()
+** will always return SQLITE_BUSY. The SQLite core only ever uses
+** sqlite3_mutex_try() as an optimization so this is acceptable
+** behavior.)^
+**
+** ^The sqlite3_mutex_leave() routine exits a mutex that was
+** previously entered by the same thread.   The behavior
+** is undefined if the mutex is not currently entered by the
+** calling thread or is not currently allocated.
+**
+** ^If the argument to sqlite3_mutex_enter(), sqlite3_mutex_try(), or
+** sqlite3_mutex_leave() is a NULL pointer, then all three routines
+** behave as no-ops.
+**
+** See also: [sqlite3_mutex_held()] and [sqlite3_mutex_notheld()].
+*/
+sqlite3_mutex* sqlite3_mutex_alloc(int);
+void sqlite3_mutex_free(sqlite3_mutex*);
+void sqlite3_mutex_enter(sqlite3_mutex*);
+int sqlite3_mutex_try(sqlite3_mutex*);
+void sqlite3_mutex_leave(sqlite3_mutex*);
+
+/*
+** CAPI3REF: Mutex Methods Object
+**
+** An instance of this structure defines the low-level routines
+** used to allocate and use mutexes.
+**
+** Usually, the default mutex implementations provided by SQLite are
+** sufficient, however the application has the option of substituting a custom
+** implementation for specialized deployments or systems for which SQLite
+** does not provide a suitable implementation. In this case, the application
+** creates and populates an instance of this structure to pass
+** to sqlite3_config() along with the [SQLITE_CONFIG_MUTEX] option.
+** Additionally, an instance of this structure can be used as an
+** output variable when querying the system for the current mutex
+** implementation, using the [SQLITE_CONFIG_GETMUTEX] option.
+**
+** ^The xMutexInit method defined by this structure is invoked as
+** part of system initialization by the sqlite3_initialize() function.
+** ^The xMutexInit routine is called by SQLite exactly once for each
+** effective call to [sqlite3_initialize()].
+**
+** ^The xMutexEnd method defined by this structure is invoked as
+** part of system shutdown by the sqlite3_shutdown() function. The
+** implementation of this method is expected to release all outstanding
+** resources obtained by the mutex methods implementation, especially
+** those obtained by the xMutexInit method.  ^The xMutexEnd()
+** interface is invoked exactly once for each call to [sqlite3_shutdown()].
+**
+** ^(The remaining seven methods defined by this structure (xMutexAlloc,
+** xMutexFree, xMutexEnter, xMutexTry, xMutexLeave, xMutexHeld and
+** xMutexNotheld) implement the following interfaces (respectively):
+**
+** <ul>
+**   <li>  [sqlite3_mutex_alloc()] </li>
+**   <li>  [sqlite3_mutex_free()] </li>
+**   <li>  [sqlite3_mutex_enter()] </li>
+**   <li>  [sqlite3_mutex_try()] </li>
+**   <li>  [sqlite3_mutex_leave()] </li>
+**   <li>  [sqlite3_mutex_held()] </li>
+**   <li>  [sqlite3_mutex_notheld()] </li>
+** </ul>)^
+**
+** The only difference is that the public sqlite3_XXX functions enumerated
+** above silently ignore any invocations that pass a NULL pointer instead
+** of a valid mutex handle. The implementations of the methods defined
+** by this structure are not required to handle this case, the results
+** of passing a NULL pointer instead of a valid mutex handle are undefined
+** (i.e. it is acceptable to provide an implementation that segfaults if
+** it is passed a NULL pointer).
+**
+** The xMutexInit() method must be threadsafe.  It must be harmless to
+** invoke xMutexInit() multiple times within the same process and without
+** intervening calls to xMutexEnd().  Second and subsequent calls to
+** xMutexInit() must be no-ops.
+**
+** xMutexInit() must not use SQLite memory allocation ([sqlite3_malloc()]
+** and its associates).  Similarly, xMutexAlloc() must not use SQLite memory
+** allocation for a static mutex.  ^However xMutexAlloc() may use SQLite
+** memory allocation for a fast or recursive mutex.
+**
+** ^SQLite will invoke the xMutexEnd() method when [sqlite3_shutdown()] is
+** called, but only if the prior call to xMutexInit returned SQLITE_OK.
+** If xMutexInit fails in any way, it is expected to clean up after itself
+** prior to returning.
+*/
+struct sqlite3_mutex_methods
+{
+    int function() xMutexInit;
+    int function() xMutexEnd;
+    sqlite3_mutex* function(int) xMutexAlloc;
+    void function(sqlite3_mutex*) xMutexFree;
+    void function(sqlite3_mutex*) xMutexEnter;
+    int function(sqlite3_mutex*) xMutexTry;
+    void function(sqlite3_mutex*) xMutexLeave;
+    int function(sqlite3_mutex*) xMutexHeld;
+    int function(sqlite3_mutex*) xMutexNotheld;
+}
+
+/*
+** CAPI3REF: Mutex Verification Routines
+**
+** The sqlite3_mutex_held() and sqlite3_mutex_notheld() routines
+** are intended for use inside assert() statements.  The SQLite core
+** never uses these routines except inside an assert() and applications
+** are advised to follow the lead of the core.  The SQLite core only
+** provides implementations for these routines when it is compiled
+** with the SQLITE_DEBUG flag.  External mutex implementations
+** are only required to provide these routines if SQLITE_DEBUG is
+** defined and if NDEBUG is not defined.
+**
+** These routines should return true if the mutex in their argument
+** is held or not held, respectively, by the calling thread.
+**
+** The implementation is not required to provide versions of these
+** routines that actually work. If the implementation does not provide working
+** versions of these routines, it should at least provide stubs that always
+** return true so that one does not get spurious assertion failures.
+**
+** If the argument to sqlite3_mutex_held() is a NULL pointer then
+** the routine should return 1.   This seems counter-intuitive since
+** clearly the mutex cannot be held if it does not exist.  But
+** the reason the mutex does not exist is because the build is not
+** using mutexes.  And we do not want the assert() containing the
+** call to sqlite3_mutex_held() to fail, so a non-zero return is
+** the appropriate thing to do.  The sqlite3_mutex_notheld()
+** interface should also return 1 when given a NULL pointer.
+*/
+
+int sqlite3_mutex_held(sqlite3_mutex*);
+int sqlite3_mutex_notheld(sqlite3_mutex*);
+
+/*
+** CAPI3REF: Mutex Types
+**
+** The [sqlite3_mutex_alloc()] interface takes a single argument
+** which is one of these integer constants.
+**
+** The set of static mutexes may change from one SQLite release to the
+** next.  Applications that override the built-in mutex logic must be
+** prepared to accommodate additional static mutexes.
+*/
+enum SQLITE_MUTEX_FAST = 0;
+enum SQLITE_MUTEX_RECURSIVE = 1;
+enum SQLITE_MUTEX_STATIC_MASTER = 2;
+enum SQLITE_MUTEX_STATIC_MEM = 3; /* sqlite3_malloc() */
+enum SQLITE_MUTEX_STATIC_MEM2 = 4; /* NOT USED */
+enum SQLITE_MUTEX_STATIC_OPEN = 4; /* sqlite3BtreeOpen() */
+enum SQLITE_MUTEX_STATIC_PRNG = 5; /* sqlite3_randomness() */
+enum SQLITE_MUTEX_STATIC_LRU = 6; /* lru page list */
+enum SQLITE_MUTEX_STATIC_LRU2 = 7; /* NOT USED */
+enum SQLITE_MUTEX_STATIC_PMEM = 7; /* sqlite3PageMalloc() */
+enum SQLITE_MUTEX_STATIC_APP1 = 8; /* For use by application */
+enum SQLITE_MUTEX_STATIC_APP2 = 9; /* For use by application */
+enum SQLITE_MUTEX_STATIC_APP3 = 10; /* For use by application */
+enum SQLITE_MUTEX_STATIC_VFS1 = 11; /* For use by built-in VFS */
+enum SQLITE_MUTEX_STATIC_VFS2 = 12; /* For use by extension VFS */
+enum SQLITE_MUTEX_STATIC_VFS3 = 13; /* For use by application VFS */
+
+/*
+** CAPI3REF: Retrieve the mutex for a database connection
+** METHOD: sqlite3
+**
+** ^This interface returns a pointer the [sqlite3_mutex] object that
+** serializes access to the [database connection] given in the argument
+** when the [threading mode] is Serialized.
+** ^If the [threading mode] is Single-thread or Multi-thread then this
+** routine returns a NULL pointer.
+*/
+sqlite3_mutex* sqlite3_db_mutex(sqlite3*);
+
+/*
+** CAPI3REF: Low-Level Control Of Database Files
+** METHOD: sqlite3
+** KEYWORDS: {file control}
+**
+** ^The [sqlite3_file_control()] interface makes a direct call to the
+** xFileControl method for the [sqlite3_io_methods] object associated
+** with a particular database identified by the second argument. ^The
+** name of the database is "main" for the main database or "temp" for the
+** TEMP database, or the name that appears after the AS keyword for
+** databases that are added using the [ATTACH] SQL command.
+** ^A NULL pointer can be used in place of "main" to refer to the
+** main database file.
+** ^The third and fourth parameters to this routine
+** are passed directly through to the second and third parameters of
+** the xFileControl method.  ^The return value of the xFileControl
+** method becomes the return value of this routine.
+**
+** A few opcodes for [sqlite3_file_control()] are handled directly
+** by the SQLite core and never invoke the
+** sqlite3_io_methods.xFileControl method.
+** ^The [SQLITE_FCNTL_FILE_POINTER] value for the op parameter causes
+** a pointer to the underlying [sqlite3_file] object to be written into
+** the space pointed to by the 4th parameter.  The
+** [SQLITE_FCNTL_JOURNAL_POINTER] works similarly except that it returns
+** the [sqlite3_file] object associated with the journal file instead of
+** the main database.  The [SQLITE_FCNTL_VFS_POINTER] opcode returns
+** a pointer to the underlying [sqlite3_vfs] object for the file.
+** The [SQLITE_FCNTL_DATA_VERSION] returns the data version counter
+** from the pager.
+**
+** ^If the second parameter (zDbName) does not match the name of any
+** open database file, then SQLITE_ERROR is returned.  ^This error
+** code is not remembered and will not be recalled by [sqlite3_errcode()]
+** or [sqlite3_errmsg()].  The underlying xFileControl method might
+** also return SQLITE_ERROR.  There is no way to distinguish between
+** an incorrect zDbName and an SQLITE_ERROR return from the underlying
+** xFileControl method.
+**
+** See also: [file control opcodes]
+*/
+int sqlite3_file_control(sqlite3*, const(char)* zDbName, int op, void*);
+
+/*
+** CAPI3REF: Testing Interface
+**
+** ^The sqlite3_test_control() interface is used to read out internal
+** state of SQLite and to inject faults into SQLite for testing
+** purposes.  ^The first parameter is an operation code that determines
+** the number, meaning, and operation of all subsequent parameters.
+**
+** This interface is not for use by applications.  It exists solely
+** for verifying the correct operation of the SQLite library.  Depending
+** on how the SQLite library is compiled, this interface might not exist.
+**
+** The details of the operation codes, their meanings, the parameters
+** they take, and what they do are all subject to change without notice.
+** Unlike most of the SQLite API, this function is not guaranteed to
+** operate consistently from one release to the next.
+*/
+int sqlite3_test_control(int op, ...);
+
+/*
+** CAPI3REF: Testing Interface Operation Codes
+**
+** These constants are the valid operation code parameters used
+** as the first argument to [sqlite3_test_control()].
+**
+** These parameters and their meanings are subject to change
+** without notice.  These values are for testing purposes only.
+** Applications should not use any of these parameters or the
+** [sqlite3_test_control()] interface.
+*/
+enum SQLITE_TESTCTRL_FIRST = 5;
+enum SQLITE_TESTCTRL_PRNG_SAVE = 5;
+enum SQLITE_TESTCTRL_PRNG_RESTORE = 6;
+enum SQLITE_TESTCTRL_PRNG_RESET = 7;
+enum SQLITE_TESTCTRL_BITVEC_TEST = 8;
+enum SQLITE_TESTCTRL_FAULT_INSTALL = 9;
+enum SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS = 10;
+enum SQLITE_TESTCTRL_PENDING_BYTE = 11;
+enum SQLITE_TESTCTRL_ASSERT = 12;
+enum SQLITE_TESTCTRL_ALWAYS = 13;
+enum SQLITE_TESTCTRL_RESERVE = 14;
+enum SQLITE_TESTCTRL_OPTIMIZATIONS = 15;
+enum SQLITE_TESTCTRL_ISKEYWORD = 16; /* NOT USED */
+enum SQLITE_TESTCTRL_SCRATCHMALLOC = 17; /* NOT USED */
+enum SQLITE_TESTCTRL_LOCALTIME_FAULT = 18;
+enum SQLITE_TESTCTRL_EXPLAIN_STMT = 19; /* NOT USED */
+enum SQLITE_TESTCTRL_ONCE_RESET_THRESHOLD = 19;
+enum SQLITE_TESTCTRL_NEVER_CORRUPT = 20;
+enum SQLITE_TESTCTRL_VDBE_COVERAGE = 21;
+enum SQLITE_TESTCTRL_BYTEORDER = 22;
+enum SQLITE_TESTCTRL_ISINIT = 23;
+enum SQLITE_TESTCTRL_SORTER_MMAP = 24;
+enum SQLITE_TESTCTRL_IMPOSTER = 25;
+enum SQLITE_TESTCTRL_PARSER_COVERAGE = 26;
+enum SQLITE_TESTCTRL_LAST = 26; /* Largest TESTCTRL */
+
+/*
+** CAPI3REF: SQL Keyword Checking
+**
+** These routines provide access to the set of SQL language keywords
+** recognized by SQLite.  Applications can uses these routines to determine
+** whether or not a specific identifier needs to be escaped (for example,
+** by enclosing in double-quotes) so as not to confuse the parser.
+**
+** The sqlite3_keyword_count() interface returns the number of distinct
+** keywords understood by SQLite.
+**
+** The sqlite3_keyword_name(N,Z,L) interface finds the N-th keyword and
+** makes *Z point to that keyword expressed as UTF8 and writes the number
+** of bytes in the keyword into *L.  The string that *Z points to is not
+** zero-terminated.  The sqlite3_keyword_name(N,Z,L) routine returns
+** SQLITE_OK if N is within bounds and SQLITE_ERROR if not. If either Z
+** or L are NULL or invalid pointers then calls to
+** sqlite3_keyword_name(N,Z,L) result in undefined behavior.
+**
+** The sqlite3_keyword_check(Z,L) interface checks to see whether or not
+** the L-byte UTF8 identifier that Z points to is a keyword, returning non-zero
+** if it is and zero if not.
+**
+** The parser used by SQLite is forgiving.  It is often possible to use
+** a keyword as an identifier as long as such use does not result in a
+** parsing ambiguity.  For example, the statement
+** "CREATE TABLE BEGIN(REPLACE,PRAGMA,END);" is accepted by SQLite, and
+** creates a new table named "BEGIN" with three columns named
+** "REPLACE", "PRAGMA", and "END".  Nevertheless, best practice is to avoid
+** using keywords as identifiers.  Common techniques used to avoid keyword
+** name collisions include:
+** <ul>
+** <li> Put all identifier names inside double-quotes.  This is the official
+**      SQL way to escape identifier names.
+** <li> Put identifier names inside &#91;...&#93;.  This is not standard SQL,
+**      but it is what SQL Server does and so lots of programmers use this
+**      technique.
+** <li> Begin every identifier with the letter "Z" as no SQL keywords start
+**      with "Z".
+** <li> Include a digit somewhere in every identifier name.
+** </ul>
+**
+** Note that the number of keywords understood by SQLite can depend on
+** compile-time options.  For example, "VACUUM" is not a keyword if
+** SQLite is compiled with the [-DSQLITE_OMIT_VACUUM] option.  Also,
+** new keywords may be added to future releases of SQLite.
+*/
+int sqlite3_keyword_count();
+int sqlite3_keyword_name(int, const(char*)*, int*);
+int sqlite3_keyword_check(const(char)*, int);
+
+/*
+** CAPI3REF: Dynamic String Object
+** KEYWORDS: {dynamic string}
+**
+** An instance of the sqlite3_str object contains a dynamically-sized
+** string under construction.
+**
+** The lifecycle of an sqlite3_str object is as follows:
+** <ol>
+** <li> ^The sqlite3_str object is created using [sqlite3_str_new()].
+** <li> ^Text is appended to the sqlite3_str object using various
+** methods, such as [sqlite3_str_appendf()].
+** <li> ^The sqlite3_str object is destroyed and the string it created
+** is returned using the [sqlite3_str_finish()] interface.
+** </ol>
+*/
+struct sqlite3_str;
+
+/*
+** CAPI3REF: Create A New Dynamic String Object
+** CONSTRUCTOR: sqlite3_str
+**
+** ^The [sqlite3_str_new(D)] interface allocates and initializes
+** a new [sqlite3_str] object.  To avoid memory leaks, the object returned by
+** [sqlite3_str_new()] must be freed by a subsequent call to
+** [sqlite3_str_finish(X)].
+**
+** ^The [sqlite3_str_new(D)] interface always returns a pointer to a
+** valid [sqlite3_str] object, though in the event of an out-of-memory
+** error the returned object might be a special singleton that will
+** silently reject new text, always return SQLITE_NOMEM from
+** [sqlite3_str_errcode()], always return 0 for
+** [sqlite3_str_length()], and always return NULL from
+** [sqlite3_str_finish(X)].  It is always safe to use the value
+** returned by [sqlite3_str_new(D)] as the sqlite3_str parameter
+** to any of the other [sqlite3_str] methods.
+**
+** The D parameter to [sqlite3_str_new(D)] may be NULL.  If the
+** D parameter in [sqlite3_str_new(D)] is not NULL, then the maximum
+** length of the string contained in the [sqlite3_str] object will be
+** the value set for [sqlite3_limit](D,[SQLITE_LIMIT_LENGTH]) instead
+** of [SQLITE_MAX_LENGTH].
+*/
+sqlite3_str* sqlite3_str_new(sqlite3*);
+
+/*
+** CAPI3REF: Finalize A Dynamic String
+** DESTRUCTOR: sqlite3_str
+**
+** ^The [sqlite3_str_finish(X)] interface destroys the sqlite3_str object X
+** and returns a pointer to a memory buffer obtained from [sqlite3_malloc64()]
+** that contains the constructed string.  The calling application should
+** pass the returned value to [sqlite3_free()] to avoid a memory leak.
+** ^The [sqlite3_str_finish(X)] interface may return a NULL pointer if any
+** errors were encountered during construction of the string.  ^The
+** [sqlite3_str_finish(X)] interface will also return a NULL pointer if the
+** string in [sqlite3_str] object X is zero bytes long.
+*/
+char* sqlite3_str_finish(sqlite3_str*);
+
+/*
+** CAPI3REF: Add Content To A Dynamic String
+** METHOD: sqlite3_str
+**
+** These interfaces add content to an sqlite3_str object previously obtained
+** from [sqlite3_str_new()].
+**
+** ^The [sqlite3_str_appendf(X,F,...)] and
+** [sqlite3_str_vappendf(X,F,V)] interfaces uses the [built-in printf]
+** functionality of SQLite to append formatted text onto the end of
+** [sqlite3_str] object X.
+**
+** ^The [sqlite3_str_append(X,S,N)] method appends exactly N bytes from string S
+** onto the end of the [sqlite3_str] object X.  N must be non-negative.
+** S must contain at least N non-zero bytes of content.  To append a
+** zero-terminated string in its entirety, use the [sqlite3_str_appendall()]
+** method instead.
+**
+** ^The [sqlite3_str_appendall(X,S)] method appends the complete content of
+** zero-terminated string S onto the end of [sqlite3_str] object X.
+**
+** ^The [sqlite3_str_appendchar(X,N,C)] method appends N copies of the
+** single-byte character C onto the end of [sqlite3_str] object X.
+** ^This method can be used, for example, to add whitespace indentation.
+**
+** ^The [sqlite3_str_reset(X)] method resets the string under construction
+** inside [sqlite3_str] object X back to zero bytes in length.
+**
+** These methods do not return a result code.  ^If an error occurs, that fact
+** is recorded in the [sqlite3_str] object and can be recovered by a
+** subsequent call to [sqlite3_str_errcode(X)].
+*/
+void sqlite3_str_appendf(sqlite3_str*, const(char)* zFormat, ...);
+void sqlite3_str_vappendf(sqlite3_str*, const(char)* zFormat, va_list);
+void sqlite3_str_append(sqlite3_str*, const(char)* zIn, int N);
+void sqlite3_str_appendall(sqlite3_str*, const(char)* zIn);
+void sqlite3_str_appendchar(sqlite3_str*, int N, char C);
+void sqlite3_str_reset(sqlite3_str*);
+
+/*
+** CAPI3REF: Status Of A Dynamic String
+** METHOD: sqlite3_str
+**
+** These interfaces return the current status of an [sqlite3_str] object.
+**
+** ^If any prior errors have occurred while constructing the dynamic string
+** in sqlite3_str X, then the [sqlite3_str_errcode(X)] method will return
+** an appropriate error code.  ^The [sqlite3_str_errcode(X)] method returns
+** [SQLITE_NOMEM] following any out-of-memory error, or
+** [SQLITE_TOOBIG] if the size of the dynamic string exceeds
+** [SQLITE_MAX_LENGTH], or [SQLITE_OK] if there have been no errors.
+**
+** ^The [sqlite3_str_length(X)] method returns the current length, in bytes,
+** of the dynamic string under construction in [sqlite3_str] object X.
+** ^The length returned by [sqlite3_str_length(X)] does not include the
+** zero-termination byte.
+**
+** ^The [sqlite3_str_value(X)] method returns a pointer to the current
+** content of the dynamic string under construction in X.  The value
+** returned by [sqlite3_str_value(X)] is managed by the sqlite3_str object X
+** and might be freed or altered by any subsequent method on the same
+** [sqlite3_str] object.  Applications must not used the pointer returned
+** [sqlite3_str_value(X)] after any subsequent method call on the same
+** object.  ^Applications may change the content of the string returned
+** by [sqlite3_str_value(X)] as long as they do not write into any bytes
+** outside the range of 0 to [sqlite3_str_length(X)] and do not read or
+** write any byte after any subsequent sqlite3_str method call.
+*/
+int sqlite3_str_errcode(sqlite3_str*);
+int sqlite3_str_length(sqlite3_str*);
+char* sqlite3_str_value(sqlite3_str*);
+
+/*
+** CAPI3REF: SQLite Runtime Status
+**
+** ^These interfaces are used to retrieve runtime status information
+** about the performance of SQLite, and optionally to reset various
+** highwater marks.  ^The first argument is an integer code for
+** the specific parameter to measure.  ^(Recognized integer codes
+** are of the form [status parameters | SQLITE_STATUS_...].)^
+** ^The current value of the parameter is returned into *pCurrent.
+** ^The highest recorded value is returned in *pHighwater.  ^If the
+** resetFlag is true, then the highest record value is reset after
+** *pHighwater is written.  ^(Some parameters do not record the highest
+** value.  For those parameters
+** nothing is written into *pHighwater and the resetFlag is ignored.)^
+** ^(Other parameters record only the highwater mark and not the current
+** value.  For these latter parameters nothing is written into *pCurrent.)^
+**
+** ^The sqlite3_status() and sqlite3_status64() routines return
+** SQLITE_OK on success and a non-zero [error code] on failure.
+**
+** If either the current value or the highwater mark is too large to
+** be represented by a 32-bit integer, then the values returned by
+** sqlite3_status() are undefined.
+**
+** See also: [sqlite3_db_status()]
+*/
+int sqlite3_status(int op, int* pCurrent, int* pHighwater, int resetFlag);
+int sqlite3_status64(
+    int op,
+    sqlite3_int64* pCurrent,
+    sqlite3_int64* pHighwater,
+    int resetFlag);
+
+/*
+** CAPI3REF: Status Parameters
+** KEYWORDS: {status parameters}
+**
+** These integer constants designate various run-time status parameters
+** that can be returned by [sqlite3_status()].
+**
+** <dl>
+** [[SQLITE_STATUS_MEMORY_USED]] ^(<dt>SQLITE_STATUS_MEMORY_USED</dt>
+** <dd>This parameter is the current amount of memory checked out
+** using [sqlite3_malloc()], either directly or indirectly.  The
+** figure includes calls made to [sqlite3_malloc()] by the application
+** and internal memory usage by the SQLite library.  Auxiliary page-cache
+** memory controlled by [SQLITE_CONFIG_PAGECACHE] is not included in
+** this parameter.  The amount returned is the sum of the allocation
+** sizes as reported by the xSize method in [sqlite3_mem_methods].</dd>)^
+**
+** [[SQLITE_STATUS_MALLOC_SIZE]] ^(<dt>SQLITE_STATUS_MALLOC_SIZE</dt>
+** <dd>This parameter records the largest memory allocation request
+** handed to [sqlite3_malloc()] or [sqlite3_realloc()] (or their
+** internal equivalents).  Only the value returned in the
+** *pHighwater parameter to [sqlite3_status()] is of interest.
+** The value written into the *pCurrent parameter is undefined.</dd>)^
+**
+** [[SQLITE_STATUS_MALLOC_COUNT]] ^(<dt>SQLITE_STATUS_MALLOC_COUNT</dt>
+** <dd>This parameter records the number of separate memory allocations
+** currently checked out.</dd>)^
+**
+** [[SQLITE_STATUS_PAGECACHE_USED]] ^(<dt>SQLITE_STATUS_PAGECACHE_USED</dt>
+** <dd>This parameter returns the number of pages used out of the
+** [pagecache memory allocator] that was configured using
+** [SQLITE_CONFIG_PAGECACHE].  The
+** value returned is in pages, not in bytes.</dd>)^
+**
+** [[SQLITE_STATUS_PAGECACHE_OVERFLOW]]
+** ^(<dt>SQLITE_STATUS_PAGECACHE_OVERFLOW</dt>
+** <dd>This parameter returns the number of bytes of page cache
+** allocation which could not be satisfied by the [SQLITE_CONFIG_PAGECACHE]
+** buffer and where forced to overflow to [sqlite3_malloc()].  The
+** returned value includes allocations that overflowed because they
+** where too large (they were larger than the "sz" parameter to
+** [SQLITE_CONFIG_PAGECACHE]) and allocations that overflowed because
+** no space was left in the page cache.</dd>)^
+**
+** [[SQLITE_STATUS_PAGECACHE_SIZE]] ^(<dt>SQLITE_STATUS_PAGECACHE_SIZE</dt>
+** <dd>This parameter records the largest memory allocation request
+** handed to [pagecache memory allocator].  Only the value returned in the
+** *pHighwater parameter to [sqlite3_status()] is of interest.
+** The value written into the *pCurrent parameter is undefined.</dd>)^
+**
+** [[SQLITE_STATUS_SCRATCH_USED]] <dt>SQLITE_STATUS_SCRATCH_USED</dt>
+** <dd>No longer used.</dd>
+**
+** [[SQLITE_STATUS_SCRATCH_OVERFLOW]] ^(<dt>SQLITE_STATUS_SCRATCH_OVERFLOW</dt>
+** <dd>No longer used.</dd>
+**
+** [[SQLITE_STATUS_SCRATCH_SIZE]] <dt>SQLITE_STATUS_SCRATCH_SIZE</dt>
+** <dd>No longer used.</dd>
+**
+** [[SQLITE_STATUS_PARSER_STACK]] ^(<dt>SQLITE_STATUS_PARSER_STACK</dt>
+** <dd>The *pHighwater parameter records the deepest parser stack.
+** The *pCurrent value is undefined.  The *pHighwater value is only
+** meaningful if SQLite is compiled with [YYTRACKMAXSTACKDEPTH].</dd>)^
+** </dl>
+**
+** New status parameters may be added from time to time.
+*/
+enum SQLITE_STATUS_MEMORY_USED = 0;
+enum SQLITE_STATUS_PAGECACHE_USED = 1;
+enum SQLITE_STATUS_PAGECACHE_OVERFLOW = 2;
+enum SQLITE_STATUS_SCRATCH_USED = 3; /* NOT USED */
+enum SQLITE_STATUS_SCRATCH_OVERFLOW = 4; /* NOT USED */
+enum SQLITE_STATUS_MALLOC_SIZE = 5;
+enum SQLITE_STATUS_PARSER_STACK = 6;
+enum SQLITE_STATUS_PAGECACHE_SIZE = 7;
+enum SQLITE_STATUS_SCRATCH_SIZE = 8; /* NOT USED */
+enum SQLITE_STATUS_MALLOC_COUNT = 9;
+
+/*
+** CAPI3REF: Database Connection Status
+** METHOD: sqlite3
+**
+** ^This interface is used to retrieve runtime status information
+** about a single [database connection].  ^The first argument is the
+** database connection object to be interrogated.  ^The second argument
+** is an integer constant, taken from the set of
+** [SQLITE_DBSTATUS options], that
+** determines the parameter to interrogate.  The set of
+** [SQLITE_DBSTATUS options] is likely
+** to grow in future releases of SQLite.
+**
+** ^The current value of the requested parameter is written into *pCur
+** and the highest instantaneous value is written into *pHiwtr.  ^If
+** the resetFlg is true, then the highest instantaneous value is
+** reset back down to the current value.
+**
+** ^The sqlite3_db_status() routine returns SQLITE_OK on success and a
+** non-zero [error code] on failure.
+**
+** See also: [sqlite3_status()] and [sqlite3_stmt_status()].
+*/
+int sqlite3_db_status(sqlite3*, int op, int* pCur, int* pHiwtr, int resetFlg);
+
+/*
+** CAPI3REF: Status Parameters for database connections
+** KEYWORDS: {SQLITE_DBSTATUS options}
+**
+** These constants are the available integer "verbs" that can be passed as
+** the second argument to the [sqlite3_db_status()] interface.
+**
+** New verbs may be added in future releases of SQLite. Existing verbs
+** might be discontinued. Applications should check the return code from
+** [sqlite3_db_status()] to make sure that the call worked.
+** The [sqlite3_db_status()] interface will return a non-zero error code
+** if a discontinued or unsupported verb is invoked.
+**
+** <dl>
+** [[SQLITE_DBSTATUS_LOOKASIDE_USED]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt>
+** <dd>This parameter returns the number of lookaside memory slots currently
+** checked out.</dd>)^
+**
+** [[SQLITE_DBSTATUS_LOOKASIDE_HIT]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_HIT</dt>
+** <dd>This parameter returns the number malloc attempts that were
+** satisfied using lookaside memory. Only the high-water value is meaningful;
+** the current value is always zero.)^
+**
+** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE]]
+** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE</dt>
+** <dd>This parameter returns the number malloc attempts that might have
+** been satisfied using lookaside memory but failed due to the amount of
+** memory requested being larger than the lookaside slot size.
+** Only the high-water value is meaningful;
+** the current value is always zero.)^
+**
+** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL]]
+** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL</dt>
+** <dd>This parameter returns the number malloc attempts that might have
+** been satisfied using lookaside memory but failed due to all lookaside
+** memory already being in use.
+** Only the high-water value is meaningful;
+** the current value is always zero.)^
+**
+** [[SQLITE_DBSTATUS_CACHE_USED]] ^(<dt>SQLITE_DBSTATUS_CACHE_USED</dt>
+** <dd>This parameter returns the approximate number of bytes of heap
+** memory used by all pager caches associated with the database connection.)^
+** ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_USED is always 0.
+**
+** [[SQLITE_DBSTATUS_CACHE_USED_SHARED]]
+** ^(<dt>SQLITE_DBSTATUS_CACHE_USED_SHARED</dt>
+** <dd>This parameter is similar to DBSTATUS_CACHE_USED, except that if a
+** pager cache is shared between two or more connections the bytes of heap
+** memory used by that pager cache is divided evenly between the attached
+** connections.)^  In other words, if none of the pager caches associated
+** with the database connection are shared, this request returns the same
+** value as DBSTATUS_CACHE_USED. Or, if one or more or the pager caches are
+** shared, the value returned by this call will be smaller than that returned
+** by DBSTATUS_CACHE_USED. ^The highwater mark associated with
+** SQLITE_DBSTATUS_CACHE_USED_SHARED is always 0.
+**
+** [[SQLITE_DBSTATUS_SCHEMA_USED]] ^(<dt>SQLITE_DBSTATUS_SCHEMA_USED</dt>
+** <dd>This parameter returns the approximate number of bytes of heap
+** memory used to store the schema for all databases associated
+** with the connection - main, temp, and any [ATTACH]-ed databases.)^
+** ^The full amount of memory used by the schemas is reported, even if the
+** schema memory is shared with other database connections due to
+** [shared cache mode] being enabled.
+** ^The highwater mark associated with SQLITE_DBSTATUS_SCHEMA_USED is always 0.
+**
+** [[SQLITE_DBSTATUS_STMT_USED]] ^(<dt>SQLITE_DBSTATUS_STMT_USED</dt>
+** <dd>This parameter returns the approximate number of bytes of heap
+** and lookaside memory used by all prepared statements associated with
+** the database connection.)^
+** ^The highwater mark associated with SQLITE_DBSTATUS_STMT_USED is always 0.
+** </dd>
+**
+** [[SQLITE_DBSTATUS_CACHE_HIT]] ^(<dt>SQLITE_DBSTATUS_CACHE_HIT</dt>
+** <dd>This parameter returns the number of pager cache hits that have
+** occurred.)^ ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_HIT
+** is always 0.
+** </dd>
+**
+** [[SQLITE_DBSTATUS_CACHE_MISS]] ^(<dt>SQLITE_DBSTATUS_CACHE_MISS</dt>
+** <dd>This parameter returns the number of pager cache misses that have
+** occurred.)^ ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_MISS
+** is always 0.
+** </dd>
+**
+** [[SQLITE_DBSTATUS_CACHE_WRITE]] ^(<dt>SQLITE_DBSTATUS_CACHE_WRITE</dt>
+** <dd>This parameter returns the number of dirty cache entries that have
+** been written to disk. Specifically, the number of pages written to the
+** wal file in wal mode databases, or the number of pages written to the
+** database file in rollback mode databases. Any pages written as part of
+** transaction rollback or database recovery operations are not included.
+** If an IO or other error occurs while writing a page to disk, the effect
+** on subsequent SQLITE_DBSTATUS_CACHE_WRITE requests is undefined.)^ ^The
+** highwater mark associated with SQLITE_DBSTATUS_CACHE_WRITE is always 0.
+** </dd>
+**
+** [[SQLITE_DBSTATUS_CACHE_SPILL]] ^(<dt>SQLITE_DBSTATUS_CACHE_SPILL</dt>
+** <dd>This parameter returns the number of dirty cache entries that have
+** been written to disk in the middle of a transaction due to the page
+** cache overflowing. Transactions are more efficient if they are written
+** to disk all at once. When pages spill mid-transaction, that introduces
+** additional overhead. This parameter can be used help identify
+** inefficiencies that can be resolve by increasing the cache size.
+** </dd>
+**
+** [[SQLITE_DBSTATUS_DEFERRED_FKS]] ^(<dt>SQLITE_DBSTATUS_DEFERRED_FKS</dt>
+** <dd>This parameter returns zero for the current value if and only if
+** all foreign key constraints (deferred or immediate) have been
+** resolved.)^  ^The highwater mark is always 0.
+** </dd>
+** </dl>
+*/
+enum SQLITE_DBSTATUS_LOOKASIDE_USED = 0;
+enum SQLITE_DBSTATUS_CACHE_USED = 1;
+enum SQLITE_DBSTATUS_SCHEMA_USED = 2;
+enum SQLITE_DBSTATUS_STMT_USED = 3;
+enum SQLITE_DBSTATUS_LOOKASIDE_HIT = 4;
+enum SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE = 5;
+enum SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL = 6;
+enum SQLITE_DBSTATUS_CACHE_HIT = 7;
+enum SQLITE_DBSTATUS_CACHE_MISS = 8;
+enum SQLITE_DBSTATUS_CACHE_WRITE = 9;
+enum SQLITE_DBSTATUS_DEFERRED_FKS = 10;
+enum SQLITE_DBSTATUS_CACHE_USED_SHARED = 11;
+enum SQLITE_DBSTATUS_CACHE_SPILL = 12;
+enum SQLITE_DBSTATUS_MAX = 12; /* Largest defined DBSTATUS */
+
+/*
+** CAPI3REF: Prepared Statement Status
+** METHOD: sqlite3_stmt
+**
+** ^(Each prepared statement maintains various
+** [SQLITE_STMTSTATUS counters] that measure the number
+** of times it has performed specific operations.)^  These counters can
+** be used to monitor the performance characteristics of the prepared
+** statements.  For example, if the number of table steps greatly exceeds
+** the number of table searches or result rows, that would tend to indicate
+** that the prepared statement is using a full table scan rather than
+** an index.
+**
+** ^(This interface is used to retrieve and reset counter values from
+** a [prepared statement].  The first argument is the prepared statement
+** object to be interrogated.  The second argument
+** is an integer code for a specific [SQLITE_STMTSTATUS counter]
+** to be interrogated.)^
+** ^The current value of the requested counter is returned.
+** ^If the resetFlg is true, then the counter is reset to zero after this
+** interface call returns.
+**
+** See also: [sqlite3_status()] and [sqlite3_db_status()].
+*/
+int sqlite3_stmt_status(sqlite3_stmt*, int op, int resetFlg);
+
+/*
+** CAPI3REF: Status Parameters for prepared statements
+** KEYWORDS: {SQLITE_STMTSTATUS counter} {SQLITE_STMTSTATUS counters}
+**
+** These preprocessor macros define integer codes that name counter
+** values associated with the [sqlite3_stmt_status()] interface.
+** The meanings of the various counters are as follows:
+**
+** <dl>
+** [[SQLITE_STMTSTATUS_FULLSCAN_STEP]] <dt>SQLITE_STMTSTATUS_FULLSCAN_STEP</dt>
+** <dd>^This is the number of times that SQLite has stepped forward in
+** a table as part of a full table scan.  Large numbers for this counter
+** may indicate opportunities for performance improvement through
+** careful use of indices.</dd>
+**
+** [[SQLITE_STMTSTATUS_SORT]] <dt>SQLITE_STMTSTATUS_SORT</dt>
+** <dd>^This is the number of sort operations that have occurred.
+** A non-zero value in this counter may indicate an opportunity to
+** improvement performance through careful use of indices.</dd>
+**
+** [[SQLITE_STMTSTATUS_AUTOINDEX]] <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt>
+** <dd>^This is the number of rows inserted into transient indices that
+** were created automatically in order to help joins run faster.
+** A non-zero value in this counter may indicate an opportunity to
+** improvement performance by adding permanent indices that do not
+** need to be reinitialized each time the statement is run.</dd>
+**
+** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
+** <dd>^This is the number of virtual machine operations executed
+** by the prepared statement if that number is less than or equal
+** to 2147483647.  The number of virtual machine operations can be
+** used as a proxy for the total work done by the prepared statement.
+** If the number of virtual machine operations exceeds 2147483647
+** then the value returned by this statement status code is undefined.
+**
+** [[SQLITE_STMTSTATUS_REPREPARE]] <dt>SQLITE_STMTSTATUS_REPREPARE</dt>
+** <dd>^This is the number of times that the prepare statement has been
+** automatically regenerated due to schema changes or change to
+** [bound parameters] that might affect the query plan.
+**
+** [[SQLITE_STMTSTATUS_RUN]] <dt>SQLITE_STMTSTATUS_RUN</dt>
+** <dd>^This is the number of times that the prepared statement has
+** been run.  A single "run" for the purposes of this counter is one
+** or more calls to [sqlite3_step()] followed by a call to [sqlite3_reset()].
+** The counter is incremented on the first [sqlite3_step()] call of each
+** cycle.
+**
+** [[SQLITE_STMTSTATUS_MEMUSED]] <dt>SQLITE_STMTSTATUS_MEMUSED</dt>
+** <dd>^This is the approximate number of bytes of heap memory
+** used to store the prepared statement.  ^This value is not actually
+** a counter, and so the resetFlg parameter to sqlite3_stmt_status()
+** is ignored when the opcode is SQLITE_STMTSTATUS_MEMUSED.
+** </dd>
+** </dl>
+*/
+enum SQLITE_STMTSTATUS_FULLSCAN_STEP = 1;
+enum SQLITE_STMTSTATUS_SORT = 2;
+enum SQLITE_STMTSTATUS_AUTOINDEX = 3;
+enum SQLITE_STMTSTATUS_VM_STEP = 4;
+enum SQLITE_STMTSTATUS_REPREPARE = 5;
+enum SQLITE_STMTSTATUS_RUN = 6;
+enum SQLITE_STMTSTATUS_MEMUSED = 99;
+
+/*
+** CAPI3REF: Custom Page Cache Object
+**
+** The sqlite3_pcache type is opaque.  It is implemented by
+** the pluggable module.  The SQLite core has no knowledge of
+** its size or internal structure and never deals with the
+** sqlite3_pcache object except by holding and passing pointers
+** to the object.
+**
+** See [sqlite3_pcache_methods2] for additional information.
+*/
+struct sqlite3_pcache;
+
+/*
+** CAPI3REF: Custom Page Cache Object
+**
+** The sqlite3_pcache_page object represents a single page in the
+** page cache.  The page cache will allocate instances of this
+** object.  Various methods of the page cache use pointers to instances
+** of this object as parameters or as their return value.
+**
+** See [sqlite3_pcache_methods2] for additional information.
+*/
+struct sqlite3_pcache_page
+{
+    void* pBuf; /* The content of the page */
+    void* pExtra; /* Extra information associated with the page */
+}
+
+/*
+** CAPI3REF: Application Defined Page Cache.
+** KEYWORDS: {page cache}
+**
+** ^(The [sqlite3_config]([SQLITE_CONFIG_PCACHE2], ...) interface can
+** register an alternative page cache implementation by passing in an
+** instance of the sqlite3_pcache_methods2 structure.)^
+** In many applications, most of the heap memory allocated by
+** SQLite is used for the page cache.
+** By implementing a
+** custom page cache using this API, an application can better control
+** the amount of memory consumed by SQLite, the way in which
+** that memory is allocated and released, and the policies used to
+** determine exactly which parts of a database file are cached and for
+** how long.
+**
+** The alternative page cache mechanism is an
+** extreme measure that is only needed by the most demanding applications.
+** The built-in page cache is recommended for most uses.
+**
+** ^(The contents of the sqlite3_pcache_methods2 structure are copied to an
+** internal buffer by SQLite within the call to [sqlite3_config].  Hence
+** the application may discard the parameter after the call to
+** [sqlite3_config()] returns.)^
+**
+** [[the xInit() page cache method]]
+** ^(The xInit() method is called once for each effective
+** call to [sqlite3_initialize()])^
+** (usually only once during the lifetime of the process). ^(The xInit()
+** method is passed a copy of the sqlite3_pcache_methods2.pArg value.)^
+** The intent of the xInit() method is to set up global data structures
+** required by the custom page cache implementation.
+** ^(If the xInit() method is NULL, then the
+** built-in default page cache is used instead of the application defined
+** page cache.)^
+**
+** [[the xShutdown() page cache method]]
+** ^The xShutdown() method is called by [sqlite3_shutdown()].
+** It can be used to clean up
+** any outstanding resources before process shutdown, if required.
+** ^The xShutdown() method may be NULL.
+**
+** ^SQLite automatically serializes calls to the xInit method,
+** so the xInit method need not be threadsafe.  ^The
+** xShutdown method is only called from [sqlite3_shutdown()] so it does
+** not need to be threadsafe either.  All other methods must be threadsafe
+** in multithreaded applications.
+**
+** ^SQLite will never invoke xInit() more than once without an intervening
+** call to xShutdown().
+**
+** [[the xCreate() page cache methods]]
+** ^SQLite invokes the xCreate() method to construct a new cache instance.
+** SQLite will typically create one cache instance for each open database file,
+** though this is not guaranteed. ^The
+** first parameter, szPage, is the size in bytes of the pages that must
+** be allocated by the cache.  ^szPage will always a power of two.  ^The
+** second parameter szExtra is a number of bytes of extra storage
+** associated with each page cache entry.  ^The szExtra parameter will
+** a number less than 250.  SQLite will use the
+** extra szExtra bytes on each page to store metadata about the underlying
+** database page on disk.  The value passed into szExtra depends
+** on the SQLite version, the target platform, and how SQLite was compiled.
+** ^The third argument to xCreate(), bPurgeable, is true if the cache being
+** created will be used to cache database pages of a file stored on disk, or
+** false if it is used for an in-memory database. The cache implementation
+** does not have to do anything special based with the value of bPurgeable;
+** it is purely advisory.  ^On a cache where bPurgeable is false, SQLite will
+** never invoke xUnpin() except to deliberately delete a page.
+** ^In other words, calls to xUnpin() on a cache with bPurgeable set to
+** false will always have the "discard" flag set to true.
+** ^Hence, a cache created with bPurgeable false will
+** never contain any unpinned pages.
+**
+** [[the xCachesize() page cache method]]
+** ^(The xCachesize() method may be called at any time by SQLite to set the
+** suggested maximum cache-size (number of pages stored by) the cache
+** instance passed as the first argument. This is the value configured using
+** the SQLite "[PRAGMA cache_size]" command.)^  As with the bPurgeable
+** parameter, the implementation is not required to do anything with this
+** value; it is advisory only.
+**
+** [[the xPagecount() page cache methods]]
+** The xPagecount() method must return the number of pages currently
+** stored in the cache, both pinned and unpinned.
+**
+** [[the xFetch() page cache methods]]
+** The xFetch() method locates a page in the cache and returns a pointer to
+** an sqlite3_pcache_page object associated with that page, or a NULL pointer.
+** The pBuf element of the returned sqlite3_pcache_page object will be a
+** pointer to a buffer of szPage bytes used to store the content of a
+** single database page.  The pExtra element of sqlite3_pcache_page will be
+** a pointer to the szExtra bytes of extra storage that SQLite has requested
+** for each entry in the page cache.
+**
+** The page to be fetched is determined by the key. ^The minimum key value
+** is 1.  After it has been retrieved using xFetch, the page is considered
+** to be "pinned".
+**
+** If the requested page is already in the page cache, then the page cache
+** implementation must return a pointer to the page buffer with its content
+** intact.  If the requested page is not already in the cache, then the
+** cache implementation should use the value of the createFlag
+** parameter to help it determined what action to take:
+**
+** <table border=1 width=85% align=center>
+** <tr><th> createFlag <th> Behavior when page is not already in cache
+** <tr><td> 0 <td> Do not allocate a new page.  Return NULL.
+** <tr><td> 1 <td> Allocate a new page if it easy and convenient to do so.
+**                 Otherwise return NULL.
+** <tr><td> 2 <td> Make every effort to allocate a new page.  Only return
+**                 NULL if allocating a new page is effectively impossible.
+** </table>
+**
+** ^(SQLite will normally invoke xFetch() with a createFlag of 0 or 1.  SQLite
+** will only use a createFlag of 2 after a prior call with a createFlag of 1
+** failed.)^  In between the to xFetch() calls, SQLite may
+** attempt to unpin one or more cache pages by spilling the content of
+** pinned pages to disk and synching the operating system disk cache.
+**
+** [[the xUnpin() page cache method]]
+** ^xUnpin() is called by SQLite with a pointer to a currently pinned page
+** as its second argument.  If the third parameter, discard, is non-zero,
+** then the page must be evicted from the cache.
+** ^If the discard parameter is
+** zero, then the page may be discarded or retained at the discretion of
+** page cache implementation. ^The page cache implementation
+** may choose to evict unpinned pages at any time.
+**
+** The cache must not perform any reference counting. A single
+** call to xUnpin() unpins the page regardless of the number of prior calls
+** to xFetch().
+**
+** [[the xRekey() page cache methods]]
+** The xRekey() method is used to change the key value associated with the
+** page passed as the second argument. If the cache
+** previously contains an entry associated with newKey, it must be
+** discarded. ^Any prior cache entry associated with newKey is guaranteed not
+** to be pinned.
+**
+** When SQLite calls the xTruncate() method, the cache must discard all
+** existing cache entries with page numbers (keys) greater than or equal
+** to the value of the iLimit parameter passed to xTruncate(). If any
+** of these pages are pinned, they are implicitly unpinned, meaning that
+** they can be safely discarded.
+**
+** [[the xDestroy() page cache method]]
+** ^The xDestroy() method is used to delete a cache allocated by xCreate().
+** All resources associated with the specified cache should be freed. ^After
+** calling the xDestroy() method, SQLite considers the [sqlite3_pcache*]
+** handle invalid, and will not use it with any other sqlite3_pcache_methods2
+** functions.
+**
+** [[the xShrink() page cache method]]
+** ^SQLite invokes the xShrink() method when it wants the page cache to
+** free up as much of heap memory as possible.  The page cache implementation
+** is not obligated to free any memory, but well-behaved implementations should
+** do their best.
+*/
+struct sqlite3_pcache_methods2
+{
+    int iVersion;
+    void* pArg;
+    int function(void*) xInit;
+    void function(void*) xShutdown;
+    sqlite3_pcache* function(int szPage, int szExtra, int bPurgeable) xCreate;
+    void function(sqlite3_pcache*, int nCachesize) xCachesize;
+    int function(sqlite3_pcache*) xPagecount;
+    sqlite3_pcache_page* function(sqlite3_pcache*, uint key, int createFlag) xFetch;
+    void function(sqlite3_pcache*, sqlite3_pcache_page*, int discard) xUnpin;
+    void function(sqlite3_pcache*, sqlite3_pcache_page*, uint oldKey, uint newKey) xRekey;
+    void function(sqlite3_pcache*, uint iLimit) xTruncate;
+    void function(sqlite3_pcache*) xDestroy;
+    void function(sqlite3_pcache*) xShrink;
+}
+
+/*
+** This is the obsolete pcache_methods object that has now been replaced
+** by sqlite3_pcache_methods2.  This object is not used by SQLite.  It is
+** retained in the header file for backwards compatibility only.
+*/
+struct sqlite3_pcache_methods
+{
+    void* pArg;
+    int function(void*) xInit;
+    void function(void*) xShutdown;
+    sqlite3_pcache* function(int szPage, int bPurgeable) xCreate;
+    void function(sqlite3_pcache*, int nCachesize) xCachesize;
+    int function(sqlite3_pcache*) xPagecount;
+    void* function(sqlite3_pcache*, uint key, int createFlag) xFetch;
+    void function(sqlite3_pcache*, void*, int discard) xUnpin;
+    void function(sqlite3_pcache*, void*, uint oldKey, uint newKey) xRekey;
+    void function(sqlite3_pcache*, uint iLimit) xTruncate;
+    void function(sqlite3_pcache*) xDestroy;
+}
+
+/*
+** CAPI3REF: Online Backup Object
+**
+** The sqlite3_backup object records state information about an ongoing
+** online backup operation.  ^The sqlite3_backup object is created by
+** a call to [sqlite3_backup_init()] and is destroyed by a call to
+** [sqlite3_backup_finish()].
+**
+** See Also: [Using the SQLite Online Backup API]
+*/
+struct sqlite3_backup;
+
+/*
+** CAPI3REF: Online Backup API.
+**
+** The backup API copies the content of one database into another.
+** It is useful either for creating backups of databases or
+** for copying in-memory databases to or from persistent files.
+**
+** See Also: [Using the SQLite Online Backup API]
+**
+** ^SQLite holds a write transaction open on the destination database file
+** for the duration of the backup operation.
+** ^The source database is read-locked only while it is being read;
+** it is not locked continuously for the entire backup operation.
+** ^Thus, the backup may be performed on a live source database without
+** preventing other database connections from
+** reading or writing to the source database while the backup is underway.
+**
+** ^(To perform a backup operation:
+**   <ol>
+**     <li><b>sqlite3_backup_init()</b> is called once to initialize the
+**         backup,
+**     <li><b>sqlite3_backup_step()</b> is called one or more times to transfer
+**         the data between the two databases, and finally
+**     <li><b>sqlite3_backup_finish()</b> is called to release all resources
+**         associated with the backup operation.
+**   </ol>)^
+** There should be exactly one call to sqlite3_backup_finish() for each
+** successful call to sqlite3_backup_init().
+**
+** [[sqlite3_backup_init()]] <b>sqlite3_backup_init()</b>
+**
+** ^The D and N arguments to sqlite3_backup_init(D,N,S,M) are the
+** [database connection] associated with the destination database
+** and the database name, respectively.
+** ^The database name is "main" for the main database, "temp" for the
+** temporary database, or the name specified after the AS keyword in
+** an [ATTACH] statement for an attached database.
+** ^The S and M arguments passed to
+** sqlite3_backup_init(D,N,S,M) identify the [database connection]
+** and database name of the source database, respectively.
+** ^The source and destination [database connections] (parameters S and D)
+** must be different or else sqlite3_backup_init(D,N,S,M) will fail with
+** an error.
+**
+** ^A call to sqlite3_backup_init() will fail, returning NULL, if
+** there is already a read or read-write transaction open on the
+** destination database.
+**
+** ^If an error occurs within sqlite3_backup_init(D,N,S,M), then NULL is
+** returned and an error code and error message are stored in the
+** destination [database connection] D.
+** ^The error code and message for the failed call to sqlite3_backup_init()
+** can be retrieved using the [sqlite3_errcode()], [sqlite3_errmsg()], and/or
+** [sqlite3_errmsg16()] functions.
+** ^A successful call to sqlite3_backup_init() returns a pointer to an
+** [sqlite3_backup] object.
+** ^The [sqlite3_backup] object may be used with the sqlite3_backup_step() and
+** sqlite3_backup_finish() functions to perform the specified backup
+** operation.
+**
+** [[sqlite3_backup_step()]] <b>sqlite3_backup_step()</b>
+**
+** ^Function sqlite3_backup_step(B,N) will copy up to N pages between
+** the source and destination databases specified by [sqlite3_backup] object B.
+** ^If N is negative, all remaining source pages are copied.
+** ^If sqlite3_backup_step(B,N) successfully copies N pages and there
+** are still more pages to be copied, then the function returns [SQLITE_OK].
+** ^If sqlite3_backup_step(B,N) successfully finishes copying all pages
+** from source to destination, then it returns [SQLITE_DONE].
+** ^If an error occurs while running sqlite3_backup_step(B,N),
+** then an [error code] is returned. ^As well as [SQLITE_OK] and
+** [SQLITE_DONE], a call to sqlite3_backup_step() may return [SQLITE_READONLY],
+** [SQLITE_NOMEM], [SQLITE_BUSY], [SQLITE_LOCKED], or an
+** [SQLITE_IOERR_ACCESS | SQLITE_IOERR_XXX] extended error code.
+**
+** ^(The sqlite3_backup_step() might return [SQLITE_READONLY] if
+** <ol>
+** <li> the destination database was opened read-only, or
+** <li> the destination database is using write-ahead-log journaling
+** and the destination and source page sizes differ, or
+** <li> the destination database is an in-memory database and the
+** destination and source page sizes differ.
+** </ol>)^
+**
+** ^If sqlite3_backup_step() cannot obtain a required file-system lock, then
+** the [sqlite3_busy_handler | busy-handler function]
+** is invoked (if one is specified). ^If the
+** busy-handler returns non-zero before the lock is available, then
+** [SQLITE_BUSY] is returned to the caller. ^In this case the call to
+** sqlite3_backup_step() can be retried later. ^If the source
+** [database connection]
+** is being used to write to the source database when sqlite3_backup_step()
+** is called, then [SQLITE_LOCKED] is returned immediately. ^Again, in this
+** case the call to sqlite3_backup_step() can be retried later on. ^(If
+** [SQLITE_IOERR_ACCESS | SQLITE_IOERR_XXX], [SQLITE_NOMEM], or
+** [SQLITE_READONLY] is returned, then
+** there is no point in retrying the call to sqlite3_backup_step(). These
+** errors are considered fatal.)^  The application must accept
+** that the backup operation has failed and pass the backup operation handle
+** to the sqlite3_backup_finish() to release associated resources.
+**
+** ^The first call to sqlite3_backup_step() obtains an exclusive lock
+** on the destination file. ^The exclusive lock is not released until either
+** sqlite3_backup_finish() is called or the backup operation is complete
+** and sqlite3_backup_step() returns [SQLITE_DONE].  ^Every call to
+** sqlite3_backup_step() obtains a [shared lock] on the source database that
+** lasts for the duration of the sqlite3_backup_step() call.
+** ^Because the source database is not locked between calls to
+** sqlite3_backup_step(), the source database may be modified mid-way
+** through the backup process.  ^If the source database is modified by an
+** external process or via a database connection other than the one being
+** used by the backup operation, then the backup will be automatically
+** restarted by the next call to sqlite3_backup_step(). ^If the source
+** database is modified by the using the same database connection as is used
+** by the backup operation, then the backup database is automatically
+** updated at the same time.
+**
+** [[sqlite3_backup_finish()]] <b>sqlite3_backup_finish()</b>
+**
+** When sqlite3_backup_step() has returned [SQLITE_DONE], or when the
+** application wishes to abandon the backup operation, the application
+** should destroy the [sqlite3_backup] by passing it to sqlite3_backup_finish().
+** ^The sqlite3_backup_finish() interfaces releases all
+** resources associated with the [sqlite3_backup] object.
+** ^If sqlite3_backup_step() has not yet returned [SQLITE_DONE], then any
+** active write-transaction on the destination database is rolled back.
+** The [sqlite3_backup] object is invalid
+** and may not be used following a call to sqlite3_backup_finish().
+**
+** ^The value returned by sqlite3_backup_finish is [SQLITE_OK] if no
+** sqlite3_backup_step() errors occurred, regardless or whether or not
+** sqlite3_backup_step() completed.
+** ^If an out-of-memory condition or IO error occurred during any prior
+** sqlite3_backup_step() call on the same [sqlite3_backup] object, then
+** sqlite3_backup_finish() returns the corresponding [error code].
+**
+** ^A return of [SQLITE_BUSY] or [SQLITE_LOCKED] from sqlite3_backup_step()
+** is not a permanent error and does not affect the return value of
+** sqlite3_backup_finish().
+**
+** [[sqlite3_backup_remaining()]] [[sqlite3_backup_pagecount()]]
+** <b>sqlite3_backup_remaining() and sqlite3_backup_pagecount()</b>
+**
+** ^The sqlite3_backup_remaining() routine returns the number of pages still
+** to be backed up at the conclusion of the most recent sqlite3_backup_step().
+** ^The sqlite3_backup_pagecount() routine returns the total number of pages
+** in the source database at the conclusion of the most recent
+** sqlite3_backup_step().
+** ^(The values returned by these functions are only updated by
+** sqlite3_backup_step(). If the source database is modified in a way that
+** changes the size of the source database or the number of pages remaining,
+** those changes are not reflected in the output of sqlite3_backup_pagecount()
+** and sqlite3_backup_remaining() until after the next
+** sqlite3_backup_step().)^
+**
+** <b>Concurrent Usage of Database Handles</b>
+**
+** ^The source [database connection] may be used by the application for other
+** purposes while a backup operation is underway or being initialized.
+** ^If SQLite is compiled and configured to support threadsafe database
+** connections, then the source database connection may be used concurrently
+** from within other threads.
+**
+** However, the application must guarantee that the destination
+** [database connection] is not passed to any other API (by any thread) after
+** sqlite3_backup_init() is called and before the corresponding call to
+** sqlite3_backup_finish().  SQLite does not currently check to see
+** if the application incorrectly accesses the destination [database connection]
+** and so no error code is reported, but the operations may malfunction
+** nevertheless.  Use of the destination database connection while a
+** backup is in progress might also also cause a mutex deadlock.
+**
+** If running in [shared cache mode], the application must
+** guarantee that the shared cache used by the destination database
+** is not accessed while the backup is running. In practice this means
+** that the application must guarantee that the disk file being
+** backed up to is not accessed by any connection within the process,
+** not just the specific connection that was passed to sqlite3_backup_init().
+**
+** The [sqlite3_backup] object itself is partially threadsafe. Multiple
+** threads may safely make multiple concurrent calls to sqlite3_backup_step().
+** However, the sqlite3_backup_remaining() and sqlite3_backup_pagecount()
+** APIs are not strictly speaking threadsafe. If they are invoked at the
+** same time as another thread is invoking sqlite3_backup_step() it is
+** possible that they return invalid values.
+*/
+/* Destination database handle */
+/* Destination database name */
+/* Source database handle */
+/* Source database name */
+sqlite3_backup* sqlite3_backup_init(
+    sqlite3* pDest,
+    const(char)* zDestName,
+    sqlite3* pSource,
+    const(char)* zSourceName);
+int sqlite3_backup_step(sqlite3_backup* p, int nPage);
+int sqlite3_backup_finish(sqlite3_backup* p);
+int sqlite3_backup_remaining(sqlite3_backup* p);
+int sqlite3_backup_pagecount(sqlite3_backup* p);
+
+/*
+** CAPI3REF: Unlock Notification
+** METHOD: sqlite3
+**
+** ^When running in shared-cache mode, a database operation may fail with
+** an [SQLITE_LOCKED] error if the required locks on the shared-cache or
+** individual tables within the shared-cache cannot be obtained. See
+** [SQLite Shared-Cache Mode] for a description of shared-cache locking.
+** ^This API may be used to register a callback that SQLite will invoke
+** when the connection currently holding the required lock relinquishes it.
+** ^This API is only available if the library was compiled with the
+** [SQLITE_ENABLE_UNLOCK_NOTIFY] C-preprocessor symbol defined.
+**
+** See Also: [Using the SQLite Unlock Notification Feature].
+**
+** ^Shared-cache locks are released when a database connection concludes
+** its current transaction, either by committing it or rolling it back.
+**
+** ^When a connection (known as the blocked connection) fails to obtain a
+** shared-cache lock and SQLITE_LOCKED is returned to the caller, the
+** identity of the database connection (the blocking connection) that
+** has locked the required resource is stored internally. ^After an
+** application receives an SQLITE_LOCKED error, it may call the
+** sqlite3_unlock_notify() method with the blocked connection handle as
+** the first argument to register for a callback that will be invoked
+** when the blocking connections current transaction is concluded. ^The
+** callback is invoked from within the [sqlite3_step] or [sqlite3_close]
+** call that concludes the blocking connections transaction.
+**
+** ^(If sqlite3_unlock_notify() is called in a multi-threaded application,
+** there is a chance that the blocking connection will have already
+** concluded its transaction by the time sqlite3_unlock_notify() is invoked.
+** If this happens, then the specified callback is invoked immediately,
+** from within the call to sqlite3_unlock_notify().)^
+**
+** ^If the blocked connection is attempting to obtain a write-lock on a
+** shared-cache table, and more than one other connection currently holds
+** a read-lock on the same table, then SQLite arbitrarily selects one of
+** the other connections to use as the blocking connection.
+**
+** ^(There may be at most one unlock-notify callback registered by a
+** blocked connection. If sqlite3_unlock_notify() is called when the
+** blocked connection already has a registered unlock-notify callback,
+** then the new callback replaces the old.)^ ^If sqlite3_unlock_notify() is
+** called with a NULL pointer as its second argument, then any existing
+** unlock-notify callback is canceled. ^The blocked connections
+** unlock-notify callback may also be canceled by closing the blocked
+** connection using [sqlite3_close()].
+**
+** The unlock-notify callback is not reentrant. If an application invokes
+** any sqlite3_xxx API functions from within an unlock-notify callback, a
+** crash or deadlock may be the result.
+**
+** ^Unless deadlock is detected (see below), sqlite3_unlock_notify() always
+** returns SQLITE_OK.
+**
+** <b>Callback Invocation Details</b>
+**
+** When an unlock-notify callback is registered, the application provides a
+** single void* pointer that is passed to the callback when it is invoked.
+** However, the signature of the callback function allows SQLite to pass
+** it an array of void* context pointers. The first argument passed to
+** an unlock-notify callback is a pointer to an array of void* pointers,
+** and the second is the number of entries in the array.
+**
+** When a blocking connections transaction is concluded, there may be
+** more than one blocked connection that has registered for an unlock-notify
+** callback. ^If two or more such blocked connections have specified the
+** same callback function, then instead of invoking the callback function
+** multiple times, it is invoked once with the set of void* context pointers
+** specified by the blocked connections bundled together into an array.
+** This gives the application an opportunity to prioritize any actions
+** related to the set of unblocked database connections.
+**
+** <b>Deadlock Detection</b>
+**
+** Assuming that after registering for an unlock-notify callback a
+** database waits for the callback to be issued before taking any further
+** action (a reasonable assumption), then using this API may cause the
+** application to deadlock. For example, if connection X is waiting for
+** connection Y's transaction to be concluded, and similarly connection
+** Y is waiting on connection X's transaction, then neither connection
+** will proceed and the system may remain deadlocked indefinitely.
+**
+** To avoid this scenario, the sqlite3_unlock_notify() performs deadlock
+** detection. ^If a given call to sqlite3_unlock_notify() would put the
+** system in a deadlocked state, then SQLITE_LOCKED is returned and no
+** unlock-notify callback is registered. The system is said to be in
+** a deadlocked state if connection A has registered for an unlock-notify
+** callback on the conclusion of connection B's transaction, and connection
+** B has itself registered for an unlock-notify callback when connection
+** A's transaction is concluded. ^Indirect deadlock is also detected, so
+** the system is also considered to be deadlocked if connection B has
+** registered for an unlock-notify callback on the conclusion of connection
+** C's transaction, where connection C is waiting on connection A. ^Any
+** number of levels of indirection are allowed.
+**
+** <b>The "DROP TABLE" Exception</b>
+**
+** When a call to [sqlite3_step()] returns SQLITE_LOCKED, it is almost
+** always appropriate to call sqlite3_unlock_notify(). There is however,
+** one exception. When executing a "DROP TABLE" or "DROP INDEX" statement,
+** SQLite checks if there are any currently executing SELECT statements
+** that belong to the same connection. If there are, SQLITE_LOCKED is
+** returned. In this case there is no "blocking connection", so invoking
+** sqlite3_unlock_notify() results in the unlock-notify callback being
+** invoked immediately. If the application then re-attempts the "DROP TABLE"
+** or "DROP INDEX" query, an infinite loop might be the result.
+**
+** One way around this problem is to check the extended error code returned
+** by an sqlite3_step() call. ^(If there is a blocking connection, then the
+** extended error code is set to SQLITE_LOCKED_SHAREDCACHE. Otherwise, in
+** the special "DROP TABLE/INDEX" case, the extended error code is just
+** SQLITE_LOCKED.)^
+*/
+/* Waiting connection */
+/* Callback function to invoke */
+/* Argument to pass to xNotify */
+int sqlite3_unlock_notify(
+    sqlite3* pBlocked,
+    void function(void** apArg, int nArg) xNotify,
+    void* pNotifyArg);
+
+/*
+** CAPI3REF: String Comparison
+**
+** ^The [sqlite3_stricmp()] and [sqlite3_strnicmp()] APIs allow applications
+** and extensions to compare the contents of two buffers containing UTF-8
+** strings in a case-independent fashion, using the same definition of "case
+** independence" that SQLite uses internally when comparing identifiers.
+*/
+int sqlite3_stricmp(const(char)*, const(char)*);
+int sqlite3_strnicmp(const(char)*, const(char)*, int);
+
+/*
+** CAPI3REF: String Globbing
+*
+** ^The [sqlite3_strglob(P,X)] interface returns zero if and only if
+** string X matches the [GLOB] pattern P.
+** ^The definition of [GLOB] pattern matching used in
+** [sqlite3_strglob(P,X)] is the same as for the "X GLOB P" operator in the
+** SQL dialect understood by SQLite.  ^The [sqlite3_strglob(P,X)] function
+** is case sensitive.
+**
+** Note that this routine returns zero on a match and non-zero if the strings
+** do not match, the same as [sqlite3_stricmp()] and [sqlite3_strnicmp()].
+**
+** See also: [sqlite3_strlike()].
+*/
+int sqlite3_strglob(const(char)* zGlob, const(char)* zStr);
+
+/*
+** CAPI3REF: String LIKE Matching
+*
+** ^The [sqlite3_strlike(P,X,E)] interface returns zero if and only if
+** string X matches the [LIKE] pattern P with escape character E.
+** ^The definition of [LIKE] pattern matching used in
+** [sqlite3_strlike(P,X,E)] is the same as for the "X LIKE P ESCAPE E"
+** operator in the SQL dialect understood by SQLite.  ^For "X LIKE P" without
+** the ESCAPE clause, set the E parameter of [sqlite3_strlike(P,X,E)] to 0.
+** ^As with the LIKE operator, the [sqlite3_strlike(P,X,E)] function is case
+** insensitive - equivalent upper and lower case ASCII characters match
+** one another.
+**
+** ^The [sqlite3_strlike(P,X,E)] function matches Unicode characters, though
+** only ASCII characters are case folded.
+**
+** Note that this routine returns zero on a match and non-zero if the strings
+** do not match, the same as [sqlite3_stricmp()] and [sqlite3_strnicmp()].
+**
+** See also: [sqlite3_strglob()].
+*/
+int sqlite3_strlike(const(char)* zGlob, const(char)* zStr, uint cEsc);
+
+/*
+** CAPI3REF: Error Logging Interface
+**
+** ^The [sqlite3_log()] interface writes a message into the [error log]
+** established by the [SQLITE_CONFIG_LOG] option to [sqlite3_config()].
+** ^If logging is enabled, the zFormat string and subsequent arguments are
+** used with [sqlite3_snprintf()] to generate the final output string.
+**
+** The sqlite3_log() interface is intended for use by extensions such as
+** virtual tables, collating functions, and SQL functions.  While there is
+** nothing to prevent an application from calling sqlite3_log(), doing so
+** is considered bad form.
+**
+** The zFormat string must not be NULL.
+**
+** To avoid deadlocks and other threading problems, the sqlite3_log() routine
+** will not use dynamically allocated memory.  The log message is stored in
+** a fixed-length buffer on the stack.  If the log message is longer than
+** a few hundred characters, it will be truncated to the length of the
+** buffer.
+*/
+void sqlite3_log(int iErrCode, const(char)* zFormat, ...);
+
+/*
+** CAPI3REF: Write-Ahead Log Commit Hook
+** METHOD: sqlite3
+**
+** ^The [sqlite3_wal_hook()] function is used to register a callback that
+** is invoked each time data is committed to a database in wal mode.
+**
+** ^(The callback is invoked by SQLite after the commit has taken place and
+** the associated write-lock on the database released)^, so the implementation
+** may read, write or [checkpoint] the database as required.
+**
+** ^The first parameter passed to the callback function when it is invoked
+** is a copy of the third parameter passed to sqlite3_wal_hook() when
+** registering the callback. ^The second is a copy of the database handle.
+** ^The third parameter is the name of the database that was written to -
+** either "main" or the name of an [ATTACH]-ed database. ^The fourth parameter
+** is the number of pages currently in the write-ahead log file,
+** including those that were just committed.
+**
+** The callback function should normally return [SQLITE_OK].  ^If an error
+** code is returned, that error will propagate back up through the
+** SQLite code base to cause the statement that provoked the callback
+** to report an error, though the commit will have still occurred. If the
+** callback returns [SQLITE_ROW] or [SQLITE_DONE], or if it returns a value
+** that does not correspond to any valid SQLite error code, the results
+** are undefined.
+**
+** A single database handle may have at most a single write-ahead log callback
+** registered at one time. ^Calling [sqlite3_wal_hook()] replaces any
+** previously registered write-ahead log callback. ^Note that the
+** [sqlite3_wal_autocheckpoint()] interface and the
+** [wal_autocheckpoint pragma] both invoke [sqlite3_wal_hook()] and will
+** overwrite any prior [sqlite3_wal_hook()] settings.
+*/
+void* sqlite3_wal_hook(
+    sqlite3*,
+    int function(void*, sqlite3*, const(char)*, int),
+    void*);
+
+/*
+** CAPI3REF: Configure an auto-checkpoint
+** METHOD: sqlite3
+**
+** ^The [sqlite3_wal_autocheckpoint(D,N)] is a wrapper around
+** [sqlite3_wal_hook()] that causes any database on [database connection] D
+** to automatically [checkpoint]
+** after committing a transaction if there are N or
+** more frames in the [write-ahead log] file.  ^Passing zero or
+** a negative value as the nFrame parameter disables automatic
+** checkpoints entirely.
+**
+** ^The callback registered by this function replaces any existing callback
+** registered using [sqlite3_wal_hook()].  ^Likewise, registering a callback
+** using [sqlite3_wal_hook()] disables the automatic checkpoint mechanism
+** configured by this function.
+**
+** ^The [wal_autocheckpoint pragma] can be used to invoke this interface
+** from SQL.
+**
+** ^Checkpoints initiated by this mechanism are
+** [sqlite3_wal_checkpoint_v2|PASSIVE].
+**
+** ^Every new [database connection] defaults to having the auto-checkpoint
+** enabled with a threshold of 1000 or [SQLITE_DEFAULT_WAL_AUTOCHECKPOINT]
+** pages.  The use of this interface
+** is only necessary if the default setting is found to be suboptimal
+** for a particular application.
+*/
+int sqlite3_wal_autocheckpoint(sqlite3* db, int N);
+
+/*
+** CAPI3REF: Checkpoint a database
+** METHOD: sqlite3
+**
+** ^(The sqlite3_wal_checkpoint(D,X) is equivalent to
+** [sqlite3_wal_checkpoint_v2](D,X,[SQLITE_CHECKPOINT_PASSIVE],0,0).)^
+**
+** In brief, sqlite3_wal_checkpoint(D,X) causes the content in the
+** [write-ahead log] for database X on [database connection] D to be
+** transferred into the database file and for the write-ahead log to
+** be reset.  See the [checkpointing] documentation for addition
+** information.
+**
+** This interface used to be the only way to cause a checkpoint to
+** occur.  But then the newer and more powerful [sqlite3_wal_checkpoint_v2()]
+** interface was added.  This interface is retained for backwards
+** compatibility and as a convenience for applications that need to manually
+** start a callback but which do not need the full power (and corresponding
+** complication) of [sqlite3_wal_checkpoint_v2()].
+*/
+int sqlite3_wal_checkpoint(sqlite3* db, const(char)* zDb);
+
+/*
+** CAPI3REF: Checkpoint a database
+** METHOD: sqlite3
+**
+** ^(The sqlite3_wal_checkpoint_v2(D,X,M,L,C) interface runs a checkpoint
+** operation on database X of [database connection] D in mode M.  Status
+** information is written back into integers pointed to by L and C.)^
+** ^(The M parameter must be a valid [checkpoint mode]:)^
+**
+** <dl>
+** <dt>SQLITE_CHECKPOINT_PASSIVE<dd>
+**   ^Checkpoint as many frames as possible without waiting for any database
+**   readers or writers to finish, then sync the database file if all frames
+**   in the log were checkpointed. ^The [busy-handler callback]
+**   is never invoked in the SQLITE_CHECKPOINT_PASSIVE mode.
+**   ^On the other hand, passive mode might leave the checkpoint unfinished
+**   if there are concurrent readers or writers.
+**
+** <dt>SQLITE_CHECKPOINT_FULL<dd>
+**   ^This mode blocks (it invokes the
+**   [sqlite3_busy_handler|busy-handler callback]) until there is no
+**   database writer and all readers are reading from the most recent database
+**   snapshot. ^It then checkpoints all frames in the log file and syncs the
+**   database file. ^This mode blocks new database writers while it is pending,
+**   but new database readers are allowed to continue unimpeded.
+**
+** <dt>SQLITE_CHECKPOINT_RESTART<dd>
+**   ^This mode works the same way as SQLITE_CHECKPOINT_FULL with the addition
+**   that after checkpointing the log file it blocks (calls the
+**   [busy-handler callback])
+**   until all readers are reading from the database file only. ^This ensures
+**   that the next writer will restart the log file from the beginning.
+**   ^Like SQLITE_CHECKPOINT_FULL, this mode blocks new
+**   database writer attempts while it is pending, but does not impede readers.
+**
+** <dt>SQLITE_CHECKPOINT_TRUNCATE<dd>
+**   ^This mode works the same way as SQLITE_CHECKPOINT_RESTART with the
+**   addition that it also truncates the log file to zero bytes just prior
+**   to a successful return.
+** </dl>
+**
+** ^If pnLog is not NULL, then *pnLog is set to the total number of frames in
+** the log file or to -1 if the checkpoint could not run because
+** of an error or because the database is not in [WAL mode]. ^If pnCkpt is not
+** NULL,then *pnCkpt is set to the total number of checkpointed frames in the
+** log file (including any that were already checkpointed before the function
+** was called) or to -1 if the checkpoint could not run due to an error or
+** because the database is not in WAL mode. ^Note that upon successful
+** completion of an SQLITE_CHECKPOINT_TRUNCATE, the log file will have been
+** truncated to zero bytes and so both *pnLog and *pnCkpt will be set to zero.
+**
+** ^All calls obtain an exclusive "checkpoint" lock on the database file. ^If
+** any other process is running a checkpoint operation at the same time, the
+** lock cannot be obtained and SQLITE_BUSY is returned. ^Even if there is a
+** busy-handler configured, it will not be invoked in this case.
+**
+** ^The SQLITE_CHECKPOINT_FULL, RESTART and TRUNCATE modes also obtain the
+** exclusive "writer" lock on the database file. ^If the writer lock cannot be
+** obtained immediately, and a busy-handler is configured, it is invoked and
+** the writer lock retried until either the busy-handler returns 0 or the lock
+** is successfully obtained. ^The busy-handler is also invoked while waiting for
+** database readers as described above. ^If the busy-handler returns 0 before
+** the writer lock is obtained or while waiting for database readers, the
+** checkpoint operation proceeds from that point in the same way as
+** SQLITE_CHECKPOINT_PASSIVE - checkpointing as many frames as possible
+** without blocking any further. ^SQLITE_BUSY is returned in this case.
+**
+** ^If parameter zDb is NULL or points to a zero length string, then the
+** specified operation is attempted on all WAL databases [attached] to
+** [database connection] db.  In this case the
+** values written to output parameters *pnLog and *pnCkpt are undefined. ^If
+** an SQLITE_BUSY error is encountered when processing one or more of the
+** attached WAL databases, the operation is still attempted on any remaining
+** attached databases and SQLITE_BUSY is returned at the end. ^If any other
+** error occurs while processing an attached database, processing is abandoned
+** and the error code is returned to the caller immediately. ^If no error
+** (SQLITE_BUSY or otherwise) is encountered while processing the attached
+** databases, SQLITE_OK is returned.
+**
+** ^If database zDb is the name of an attached database that is not in WAL
+** mode, SQLITE_OK is returned and both *pnLog and *pnCkpt set to -1. ^If
+** zDb is not NULL (or a zero length string) and is not the name of any
+** attached database, SQLITE_ERROR is returned to the caller.
+**
+** ^Unless it returns SQLITE_MISUSE,
+** the sqlite3_wal_checkpoint_v2() interface
+** sets the error information that is queried by
+** [sqlite3_errcode()] and [sqlite3_errmsg()].
+**
+** ^The [PRAGMA wal_checkpoint] command can be used to invoke this interface
+** from SQL.
+*/
+/* Database handle */
+/* Name of attached database (or NULL) */
+/* SQLITE_CHECKPOINT_* value */
+/* OUT: Size of WAL log in frames */
+/* OUT: Total number of frames checkpointed */
+int sqlite3_wal_checkpoint_v2(
+    sqlite3* db,
+    const(char)* zDb,
+    int eMode,
+    int* pnLog,
+    int* pnCkpt);
+
+/*
+** CAPI3REF: Checkpoint Mode Values
+** KEYWORDS: {checkpoint mode}
+**
+** These constants define all valid values for the "checkpoint mode" passed
+** as the third parameter to the [sqlite3_wal_checkpoint_v2()] interface.
+** See the [sqlite3_wal_checkpoint_v2()] documentation for details on the
+** meaning of each of these checkpoint modes.
+*/
+enum SQLITE_CHECKPOINT_PASSIVE = 0; /* Do as much as possible w/o blocking */
+enum SQLITE_CHECKPOINT_FULL = 1; /* Wait for writers, then checkpoint */
+enum SQLITE_CHECKPOINT_RESTART = 2; /* Like FULL but wait for for readers */
+enum SQLITE_CHECKPOINT_TRUNCATE = 3; /* Like RESTART but also truncate WAL */
+
+/*
+** CAPI3REF: Virtual Table Interface Configuration
+**
+** This function may be called by either the [xConnect] or [xCreate] method
+** of a [virtual table] implementation to configure
+** various facets of the virtual table interface.
+**
+** If this interface is invoked outside the context of an xConnect or
+** xCreate virtual table method then the behavior is undefined.
+**
+** At present, there is only one option that may be configured using
+** this function. (See [SQLITE_VTAB_CONSTRAINT_SUPPORT].)  Further options
+** may be added in the future.
+*/
+int sqlite3_vtab_config(sqlite3*, int op, ...);
+
+/*
+** CAPI3REF: Virtual Table Configuration Options
+**
+** These macros define the various options to the
+** [sqlite3_vtab_config()] interface that [virtual table] implementations
+** can use to customize and optimize their behavior.
+**
+** <dl>
+** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT
+** <dd>Calls of the form
+** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported,
+** where X is an integer.  If X is zero, then the [virtual table] whose
+** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not
+** support constraints.  In this configuration (which is the default) if
+** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire
+** statement is rolled back as if [ON CONFLICT | OR ABORT] had been
+** specified as part of the users SQL statement, regardless of the actual
+** ON CONFLICT mode specified.
+**
+** If X is non-zero, then the virtual table implementation guarantees
+** that if [xUpdate] returns [SQLITE_CONSTRAINT], it will do so before
+** any modifications to internal or persistent data structures have been made.
+** If the [ON CONFLICT] mode is ABORT, FAIL, IGNORE or ROLLBACK, SQLite
+** is able to roll back a statement or database transaction, and abandon
+** or continue processing the current SQL statement as appropriate.
+** If the ON CONFLICT mode is REPLACE and the [xUpdate] method returns
+** [SQLITE_CONSTRAINT], SQLite handles this as if the ON CONFLICT mode
+** had been ABORT.
+**
+** Virtual table implementations that are required to handle OR REPLACE
+** must do so within the [xUpdate] method. If a call to the
+** [sqlite3_vtab_on_conflict()] function indicates that the current ON
+** CONFLICT policy is REPLACE, the virtual table implementation should
+** silently replace the appropriate rows within the xUpdate callback and
+** return SQLITE_OK. Or, if this is not possible, it may return
+** SQLITE_CONSTRAINT, in which case SQLite falls back to OR ABORT
+** constraint handling.
+** </dl>
+*/
+enum SQLITE_VTAB_CONSTRAINT_SUPPORT = 1;
+
+/*
+** CAPI3REF: Determine The Virtual Table Conflict Policy
+**
+** This function may only be called from within a call to the [xUpdate] method
+** of a [virtual table] implementation for an INSERT or UPDATE operation. ^The
+** value returned is one of [SQLITE_ROLLBACK], [SQLITE_IGNORE], [SQLITE_FAIL],
+** [SQLITE_ABORT], or [SQLITE_REPLACE], according to the [ON CONFLICT] mode
+** of the SQL statement that triggered the call to the [xUpdate] method of the
+** [virtual table].
+*/
+int sqlite3_vtab_on_conflict(sqlite3*);
+
+/*
+** CAPI3REF: Determine If Virtual Table Column Access Is For UPDATE
+**
+** If the sqlite3_vtab_nochange(X) routine is called within the [xColumn]
+** method of a [virtual table], then it returns true if and only if the
+** column is being fetched as part of an UPDATE operation during which the
+** column value will not change.  Applications might use this to substitute
+** a return value that is less expensive to compute and that the corresponding
+** [xUpdate] method understands as a "no-change" value.
+**
+** If the [xColumn] method calls sqlite3_vtab_nochange() and finds that
+** the column is not changed by the UPDATE statement, then the xColumn
+** method can optionally return without setting a result, without calling
+** any of the [sqlite3_result_int|sqlite3_result_xxxxx() interfaces].
+** In that case, [sqlite3_value_nochange(X)] will return true for the
+** same column in the [xUpdate] method.
+*/
+int sqlite3_vtab_nochange(sqlite3_context*);
+
+/*
+** CAPI3REF: Determine The Collation For a Virtual Table Constraint
+**
+** This function may only be called from within a call to the [xBestIndex]
+** method of a [virtual table].
+**
+** The first argument must be the sqlite3_index_info object that is the
+** first parameter to the xBestIndex() method. The second argument must be
+** an index into the aConstraint[] array belonging to the sqlite3_index_info
+** structure passed to xBestIndex. This function returns a pointer to a buffer
+** containing the name of the collation sequence for the corresponding
+** constraint.
+*/
+const(char)* sqlite3_vtab_collation(sqlite3_index_info*, int);
+
+/*
+** CAPI3REF: Conflict resolution modes
+** KEYWORDS: {conflict resolution mode}
+**
+** These constants are returned by [sqlite3_vtab_on_conflict()] to
+** inform a [virtual table] implementation what the [ON CONFLICT] mode
+** is for the SQL statement being evaluated.
+**
+** Note that the [SQLITE_IGNORE] constant is also used as a potential
+** return value from the [sqlite3_set_authorizer()] callback and that
+** [SQLITE_ABORT] is also a [result code].
+*/
+enum SQLITE_ROLLBACK = 1;
+/* #define SQLITE_IGNORE 2 // Also used by sqlite3_authorizer() callback */
+enum SQLITE_FAIL = 3;
+/* #define SQLITE_ABORT 4  // Also an error code */
+enum SQLITE_REPLACE = 5;
+
+/*
+** CAPI3REF: Prepared Statement Scan Status Opcodes
+** KEYWORDS: {scanstatus options}
+**
+** The following constants can be used for the T parameter to the
+** [sqlite3_stmt_scanstatus(S,X,T,V)] interface.  Each constant designates a
+** different metric for sqlite3_stmt_scanstatus() to return.
+**
+** When the value returned to V is a string, space to hold that string is
+** managed by the prepared statement S and will be automatically freed when
+** S is finalized.
+**
+** <dl>
+** [[SQLITE_SCANSTAT_NLOOP]] <dt>SQLITE_SCANSTAT_NLOOP</dt>
+** <dd>^The [sqlite3_int64] variable pointed to by the T parameter will be
+** set to the total number of times that the X-th loop has run.</dd>
+**
+** [[SQLITE_SCANSTAT_NVISIT]] <dt>SQLITE_SCANSTAT_NVISIT</dt>
+** <dd>^The [sqlite3_int64] variable pointed to by the T parameter will be set
+** to the total number of rows examined by all iterations of the X-th loop.</dd>
+**
+** [[SQLITE_SCANSTAT_EST]] <dt>SQLITE_SCANSTAT_EST</dt>
+** <dd>^The "double" variable pointed to by the T parameter will be set to the
+** query planner's estimate for the average number of rows output from each
+** iteration of the X-th loop.  If the query planner's estimates was accurate,
+** then this value will approximate the quotient NVISIT/NLOOP and the
+** product of this value for all prior loops with the same SELECTID will
+** be the NLOOP value for the current loop.
+**
+** [[SQLITE_SCANSTAT_NAME]] <dt>SQLITE_SCANSTAT_NAME</dt>
+** <dd>^The "const char *" variable pointed to by the T parameter will be set
+** to a zero-terminated UTF-8 string containing the name of the index or table
+** used for the X-th loop.
+**
+** [[SQLITE_SCANSTAT_EXPLAIN]] <dt>SQLITE_SCANSTAT_EXPLAIN</dt>
+** <dd>^The "const char *" variable pointed to by the T parameter will be set
+** to a zero-terminated UTF-8 string containing the [EXPLAIN QUERY PLAN]
+** description for the X-th loop.
+**
+** [[SQLITE_SCANSTAT_SELECTID]] <dt>SQLITE_SCANSTAT_SELECT</dt>
+** <dd>^The "int" variable pointed to by the T parameter will be set to the
+** "select-id" for the X-th loop.  The select-id identifies which query or
+** subquery the loop is part of.  The main query has a select-id of zero.
+** The select-id is the same value as is output in the first column
+** of an [EXPLAIN QUERY PLAN] query.
+** </dl>
+*/
+enum SQLITE_SCANSTAT_NLOOP = 0;
+enum SQLITE_SCANSTAT_NVISIT = 1;
+enum SQLITE_SCANSTAT_EST = 2;
+enum SQLITE_SCANSTAT_NAME = 3;
+enum SQLITE_SCANSTAT_EXPLAIN = 4;
+enum SQLITE_SCANSTAT_SELECTID = 5;
+
+/*
+** CAPI3REF: Prepared Statement Scan Status
+** METHOD: sqlite3_stmt
+**
+** This interface returns information about the predicted and measured
+** performance for pStmt.  Advanced applications can use this
+** interface to compare the predicted and the measured performance and
+** issue warnings and/or rerun [ANALYZE] if discrepancies are found.
+**
+** Since this interface is expected to be rarely used, it is only
+** available if SQLite is compiled using the [SQLITE_ENABLE_STMT_SCANSTATUS]
+** compile-time option.
+**
+** The "iScanStatusOp" parameter determines which status information to return.
+** The "iScanStatusOp" must be one of the [scanstatus options] or the behavior
+** of this interface is undefined.
+** ^The requested measurement is written into a variable pointed to by
+** the "pOut" parameter.
+** Parameter "idx" identifies the specific loop to retrieve statistics for.
+** Loops are numbered starting from zero. ^If idx is out of range - less than
+** zero or greater than or equal to the total number of loops used to implement
+** the statement - a non-zero value is returned and the variable that pOut
+** points to is unchanged.
+**
+** ^Statistics might not be available for all loops in all statements. ^In cases
+** where there exist loops with no available statistics, this function behaves
+** as if the loop did not exist - it returns non-zero and leave the variable
+** that pOut points to unchanged.
+**
+** See also: [sqlite3_stmt_scanstatus_reset()]
+*/
+/* Prepared statement for which info desired */
+/* Index of loop to report on */
+/* Information desired.  SQLITE_SCANSTAT_* */
+/* Result written here */
+int sqlite3_stmt_scanstatus(
+    sqlite3_stmt* pStmt,
+    int idx,
+    int iScanStatusOp,
+    void* pOut);
+
+/*
+** CAPI3REF: Zero Scan-Status Counters
+** METHOD: sqlite3_stmt
+**
+** ^Zero all [sqlite3_stmt_scanstatus()] related event counters.
+**
+** This API is only available if the library is built with pre-processor
+** symbol [SQLITE_ENABLE_STMT_SCANSTATUS] defined.
+*/
+void sqlite3_stmt_scanstatus_reset(sqlite3_stmt*);
+
+/*
+** CAPI3REF: Flush caches to disk mid-transaction
+**
+** ^If a write-transaction is open on [database connection] D when the
+** [sqlite3_db_cacheflush(D)] interface invoked, any dirty
+** pages in the pager-cache that are not currently in use are written out
+** to disk. A dirty page may be in use if a database cursor created by an
+** active SQL statement is reading from it, or if it is page 1 of a database
+** file (page 1 is always "in use").  ^The [sqlite3_db_cacheflush(D)]
+** interface flushes caches for all schemas - "main", "temp", and
+** any [attached] databases.
+**
+** ^If this function needs to obtain extra database locks before dirty pages
+** can be flushed to disk, it does so. ^If those locks cannot be obtained
+** immediately and there is a busy-handler callback configured, it is invoked
+** in the usual manner. ^If the required lock still cannot be obtained, then
+** the database is skipped and an attempt made to flush any dirty pages
+** belonging to the next (if any) database. ^If any databases are skipped
+** because locks cannot be obtained, but no other error occurs, this
+** function returns SQLITE_BUSY.
+**
+** ^If any other error occurs while flushing dirty pages to disk (for
+** example an IO error or out-of-memory condition), then processing is
+** abandoned and an SQLite [error code] is returned to the caller immediately.
+**
+** ^Otherwise, if no error occurs, [sqlite3_db_cacheflush()] returns SQLITE_OK.
+**
+** ^This function does not set the database handle error code or message
+** returned by the [sqlite3_errcode()] and [sqlite3_errmsg()] functions.
+*/
+int sqlite3_db_cacheflush(sqlite3*);
+
+/*
+** CAPI3REF: The pre-update hook.
+**
+** ^These interfaces are only available if SQLite is compiled using the
+** [SQLITE_ENABLE_PREUPDATE_HOOK] compile-time option.
+**
+** ^The [sqlite3_preupdate_hook()] interface registers a callback function
+** that is invoked prior to each [INSERT], [UPDATE], and [DELETE] operation
+** on a database table.
+** ^At most one preupdate hook may be registered at a time on a single
+** [database connection]; each call to [sqlite3_preupdate_hook()] overrides
+** the previous setting.
+** ^The preupdate hook is disabled by invoking [sqlite3_preupdate_hook()]
+** with a NULL pointer as the second parameter.
+** ^The third parameter to [sqlite3_preupdate_hook()] is passed through as
+** the first parameter to callbacks.
+**
+** ^The preupdate hook only fires for changes to real database tables; the
+** preupdate hook is not invoked for changes to [virtual tables] or to
+** system tables like sqlite_master or sqlite_stat1.
+**
+** ^The second parameter to the preupdate callback is a pointer to
+** the [database connection] that registered the preupdate hook.
+** ^The third parameter to the preupdate callback is one of the constants
+** [SQLITE_INSERT], [SQLITE_DELETE], or [SQLITE_UPDATE] to identify the
+** kind of update operation that is about to occur.
+** ^(The fourth parameter to the preupdate callback is the name of the
+** database within the database connection that is being modified.  This
+** will be "main" for the main database or "temp" for TEMP tables or
+** the name given after the AS keyword in the [ATTACH] statement for attached
+** databases.)^
+** ^The fifth parameter to the preupdate callback is the name of the
+** table that is being modified.
+**
+** For an UPDATE or DELETE operation on a [rowid table], the sixth
+** parameter passed to the preupdate callback is the initial [rowid] of the
+** row being modified or deleted. For an INSERT operation on a rowid table,
+** or any operation on a WITHOUT ROWID table, the value of the sixth
+** parameter is undefined. For an INSERT or UPDATE on a rowid table the
+** seventh parameter is the final rowid value of the row being inserted
+** or updated. The value of the seventh parameter passed to the callback
+** function is not defined for operations on WITHOUT ROWID tables, or for
+** INSERT operations on rowid tables.
+**
+** The [sqlite3_preupdate_old()], [sqlite3_preupdate_new()],
+** [sqlite3_preupdate_count()], and [sqlite3_preupdate_depth()] interfaces
+** provide additional information about a preupdate event. These routines
+** may only be called from within a preupdate callback.  Invoking any of
+** these routines from outside of a preupdate callback or with a
+** [database connection] pointer that is different from the one supplied
+** to the preupdate callback results in undefined and probably undesirable
+** behavior.
+**
+** ^The [sqlite3_preupdate_count(D)] interface returns the number of columns
+** in the row that is being inserted, updated, or deleted.
+**
+** ^The [sqlite3_preupdate_old(D,N,P)] interface writes into P a pointer to
+** a [protected sqlite3_value] that contains the value of the Nth column of
+** the table row before it is updated.  The N parameter must be between 0
+** and one less than the number of columns or the behavior will be
+** undefined. This must only be used within SQLITE_UPDATE and SQLITE_DELETE
+** preupdate callbacks; if it is used by an SQLITE_INSERT callback then the
+** behavior is undefined.  The [sqlite3_value] that P points to
+** will be destroyed when the preupdate callback returns.
+**
+** ^The [sqlite3_preupdate_new(D,N,P)] interface writes into P a pointer to
+** a [protected sqlite3_value] that contains the value of the Nth column of
+** the table row after it is updated.  The N parameter must be between 0
+** and one less than the number of columns or the behavior will be
+** undefined. This must only be used within SQLITE_INSERT and SQLITE_UPDATE
+** preupdate callbacks; if it is used by an SQLITE_DELETE callback then the
+** behavior is undefined.  The [sqlite3_value] that P points to
+** will be destroyed when the preupdate callback returns.
+**
+** ^The [sqlite3_preupdate_depth(D)] interface returns 0 if the preupdate
+** callback was invoked as a result of a direct insert, update, or delete
+** operation; or 1 for inserts, updates, or deletes invoked by top-level
+** triggers; or 2 for changes resulting from triggers called by top-level
+** triggers; and so forth.
+**
+** See also:  [sqlite3_update_hook()]
+*/
+
+/* Copy of third arg to preupdate_hook() */
+/* Database handle */
+/* SQLITE_UPDATE, DELETE or INSERT */
+/* Database name */
+/* Table name */
+/* Rowid of row about to be deleted/updated */
+/* New rowid value (for a rowid UPDATE) */
+
+/*
+** CAPI3REF: Low-level system error code
+**
+** ^Attempt to return the underlying operating system error code or error
+** number that caused the most recent I/O error or failure to open a file.
+** The return value is OS-dependent.  For example, on unix systems, after
+** [sqlite3_open_v2()] returns [SQLITE_CANTOPEN], this interface could be
+** called to get back the underlying "errno" that caused the problem, such
+** as ENOSPC, EAUTH, EISDIR, and so forth.
+*/
+int sqlite3_system_errno(sqlite3*);
+
+/*
+** CAPI3REF: Database Snapshot
+** KEYWORDS: {snapshot} {sqlite3_snapshot}
+**
+** An instance of the snapshot object records the state of a [WAL mode]
+** database for some specific point in history.
+**
+** In [WAL mode], multiple [database connections] that are open on the
+** same database file can each be reading a different historical version
+** of the database file.  When a [database connection] begins a read
+** transaction, that connection sees an unchanging copy of the database
+** as it existed for the point in time when the transaction first started.
+** Subsequent changes to the database from other connections are not seen
+** by the reader until a new read transaction is started.
+**
+** The sqlite3_snapshot object records state information about an historical
+** version of the database file so that it is possible to later open a new read
+** transaction that sees that historical version of the database rather than
+** the most recent version.
+*/
+struct sqlite3_snapshot
+{
+    ubyte[48] hidden;
+}
+
+/*
+** CAPI3REF: Record A Database Snapshot
+** CONSTRUCTOR: sqlite3_snapshot
+**
+** ^The [sqlite3_snapshot_get(D,S,P)] interface attempts to make a
+** new [sqlite3_snapshot] object that records the current state of
+** schema S in database connection D.  ^On success, the
+** [sqlite3_snapshot_get(D,S,P)] interface writes a pointer to the newly
+** created [sqlite3_snapshot] object into *P and returns SQLITE_OK.
+** If there is not already a read-transaction open on schema S when
+** this function is called, one is opened automatically.
+**
+** The following must be true for this function to succeed. If any of
+** the following statements are false when sqlite3_snapshot_get() is
+** called, SQLITE_ERROR is returned. The final value of *P is undefined
+** in this case.
+**
+** <ul>
+**   <li> The database handle must not be in [autocommit mode].
+**
+**   <li> Schema S of [database connection] D must be a [WAL mode] database.
+**
+**   <li> There must not be a write transaction open on schema S of database
+**        connection D.
+**
+**   <li> One or more transactions must have been written to the current wal
+**        file since it was created on disk (by any connection). This means
+**        that a snapshot cannot be taken on a wal mode database with no wal
+**        file immediately after it is first opened. At least one transaction
+**        must be written to it first.
+** </ul>
+**
+** This function may also return SQLITE_NOMEM.  If it is called with the
+** database handle in autocommit mode but fails for some other reason,
+** whether or not a read transaction is opened on schema S is undefined.
+**
+** The [sqlite3_snapshot] object returned from a successful call to
+** [sqlite3_snapshot_get()] must be freed using [sqlite3_snapshot_free()]
+** to avoid a memory leak.
+**
+** The [sqlite3_snapshot_get()] interface is only available when the
+** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
+*/
+int sqlite3_snapshot_get(
+    sqlite3* db,
+    const(char)* zSchema,
+    sqlite3_snapshot** ppSnapshot);
+
+/*
+** CAPI3REF: Start a read transaction on an historical snapshot
+** METHOD: sqlite3_snapshot
+**
+** ^The [sqlite3_snapshot_open(D,S,P)] interface either starts a new read
+** transaction or upgrades an existing one for schema S of
+** [database connection] D such that the read transaction refers to
+** historical [snapshot] P, rather than the most recent change to the
+** database. ^The [sqlite3_snapshot_open()] interface returns SQLITE_OK
+** on success or an appropriate [error code] if it fails.
+**
+** ^In order to succeed, the database connection must not be in
+** [autocommit mode] when [sqlite3_snapshot_open(D,S,P)] is called. If there
+** is already a read transaction open on schema S, then the database handle
+** must have no active statements (SELECT statements that have been passed
+** to sqlite3_step() but not sqlite3_reset() or sqlite3_finalize()).
+** SQLITE_ERROR is returned if either of these conditions is violated, or
+** if schema S does not exist, or if the snapshot object is invalid.
+**
+** ^A call to sqlite3_snapshot_open() will fail to open if the specified
+** snapshot has been overwritten by a [checkpoint]. In this case
+** SQLITE_ERROR_SNAPSHOT is returned.
+**
+** If there is already a read transaction open when this function is
+** invoked, then the same read transaction remains open (on the same
+** database snapshot) if SQLITE_ERROR, SQLITE_BUSY or SQLITE_ERROR_SNAPSHOT
+** is returned. If another error code - for example SQLITE_PROTOCOL or an
+** SQLITE_IOERR error code - is returned, then the final state of the
+** read transaction is undefined. If SQLITE_OK is returned, then the
+** read transaction is now open on database snapshot P.
+**
+** ^(A call to [sqlite3_snapshot_open(D,S,P)] will fail if the
+** database connection D does not know that the database file for
+** schema S is in [WAL mode].  A database connection might not know
+** that the database file is in [WAL mode] if there has been no prior
+** I/O on that database connection, or if the database entered [WAL mode]
+** after the most recent I/O on the database connection.)^
+** (Hint: Run "[PRAGMA application_id]" against a newly opened
+** database connection in order to make it ready to use snapshots.)
+**
+** The [sqlite3_snapshot_open()] interface is only available when the
+** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
+*/
+int sqlite3_snapshot_open(
+    sqlite3* db,
+    const(char)* zSchema,
+    sqlite3_snapshot* pSnapshot);
+
+/*
+** CAPI3REF: Destroy a snapshot
+** DESTRUCTOR: sqlite3_snapshot
+**
+** ^The [sqlite3_snapshot_free(P)] interface destroys [sqlite3_snapshot] P.
+** The application must eventually free every [sqlite3_snapshot] object
+** using this routine to avoid a memory leak.
+**
+** The [sqlite3_snapshot_free()] interface is only available when the
+** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
+*/
+void sqlite3_snapshot_free(sqlite3_snapshot*);
+
+/*
+** CAPI3REF: Compare the ages of two snapshot handles.
+** METHOD: sqlite3_snapshot
+**
+** The sqlite3_snapshot_cmp(P1, P2) interface is used to compare the ages
+** of two valid snapshot handles.
+**
+** If the two snapshot handles are not associated with the same database
+** file, the result of the comparison is undefined.
+**
+** Additionally, the result of the comparison is only valid if both of the
+** snapshot handles were obtained by calling sqlite3_snapshot_get() since the
+** last time the wal file was deleted. The wal file is deleted when the
+** database is changed back to rollback mode or when the number of database
+** clients drops to zero. If either snapshot handle was obtained before the
+** wal file was last deleted, the value returned by this function
+** is undefined.
+**
+** Otherwise, this API returns a negative value if P1 refers to an older
+** snapshot than P2, zero if the two handles refer to the same database
+** snapshot, and a positive value if P1 is a newer snapshot than P2.
+**
+** This interface is only available if SQLite is compiled with the
+** [SQLITE_ENABLE_SNAPSHOT] option.
+*/
+int sqlite3_snapshot_cmp(sqlite3_snapshot* p1, sqlite3_snapshot* p2);
+
+/*
+** CAPI3REF: Recover snapshots from a wal file
+** METHOD: sqlite3_snapshot
+**
+** If a [WAL file] remains on disk after all database connections close
+** (either through the use of the [SQLITE_FCNTL_PERSIST_WAL] [file control]
+** or because the last process to have the database opened exited without
+** calling [sqlite3_close()]) and a new connection is subsequently opened
+** on that database and [WAL file], the [sqlite3_snapshot_open()] interface
+** will only be able to open the last transaction added to the WAL file
+** even though the WAL file contains other valid transactions.
+**
+** This function attempts to scan the WAL file associated with database zDb
+** of database handle db and make all valid snapshots available to
+** sqlite3_snapshot_open(). It is an error if there is already a read
+** transaction open on the database, or if the database is not a WAL mode
+** database.
+**
+** SQLITE_OK is returned if successful, or an SQLite error code otherwise.
+**
+** This interface is only available if SQLite is compiled with the
+** [SQLITE_ENABLE_SNAPSHOT] option.
+*/
+int sqlite3_snapshot_recover(sqlite3* db, const(char)* zDb);
+
+/*
+** CAPI3REF: Serialize a database
+**
+** The sqlite3_serialize(D,S,P,F) interface returns a pointer to memory
+** that is a serialization of the S database on [database connection] D.
+** If P is not a NULL pointer, then the size of the database in bytes
+** is written into *P.
+**
+** For an ordinary on-disk database file, the serialization is just a
+** copy of the disk file.  For an in-memory database or a "TEMP" database,
+** the serialization is the same sequence of bytes which would be written
+** to disk if that database where backed up to disk.
+**
+** The usual case is that sqlite3_serialize() copies the serialization of
+** the database into memory obtained from [sqlite3_malloc64()] and returns
+** a pointer to that memory.  The caller is responsible for freeing the
+** returned value to avoid a memory leak.  However, if the F argument
+** contains the SQLITE_SERIALIZE_NOCOPY bit, then no memory allocations
+** are made, and the sqlite3_serialize() function will return a pointer
+** to the contiguous memory representation of the database that SQLite
+** is currently using for that database, or NULL if the no such contiguous
+** memory representation of the database exists.  A contiguous memory
+** representation of the database will usually only exist if there has
+** been a prior call to [sqlite3_deserialize(D,S,...)] with the same
+** values of D and S.
+** The size of the database is written into *P even if the
+** SQLITE_SERIALIZE_NOCOPY bit is set but no contiguous copy
+** of the database exists.
+**
+** A call to sqlite3_serialize(D,S,P,F) might return NULL even if the
+** SQLITE_SERIALIZE_NOCOPY bit is omitted from argument F if a memory
+** allocation error occurs.
+**
+** This interface is only available if SQLite is compiled with the
+** [SQLITE_ENABLE_DESERIALIZE] option.
+*/
+/* The database connection */
+/* Which DB to serialize. ex: "main", "temp", ... */
+/* Write size of the DB here, if not NULL */
+/* Zero or more SQLITE_SERIALIZE_* flags */
+ubyte* sqlite3_serialize(
+    sqlite3* db,
+    const(char)* zSchema,
+    sqlite3_int64* piSize,
+    uint mFlags);
+
+/*
+** CAPI3REF: Flags for sqlite3_serialize
+**
+** Zero or more of the following constants can be OR-ed together for
+** the F argument to [sqlite3_serialize(D,S,P,F)].
+**
+** SQLITE_SERIALIZE_NOCOPY means that [sqlite3_serialize()] will return
+** a pointer to contiguous in-memory database that it is currently using,
+** without making a copy of the database.  If SQLite is not currently using
+** a contiguous in-memory database, then this option causes
+** [sqlite3_serialize()] to return a NULL pointer.  SQLite will only be
+** using a contiguous in-memory database if it has been initialized by a
+** prior call to [sqlite3_deserialize()].
+*/
+enum SQLITE_SERIALIZE_NOCOPY = 0x001; /* Do no memory allocations */
+
+/*
+** CAPI3REF: Deserialize a database
+**
+** The sqlite3_deserialize(D,S,P,N,M,F) interface causes the
+** [database connection] D to disconnect from database S and then
+** reopen S as an in-memory database based on the serialization contained
+** in P.  The serialized database P is N bytes in size.  M is the size of
+** the buffer P, which might be larger than N.  If M is larger than N, and
+** the SQLITE_DESERIALIZE_READONLY bit is not set in F, then SQLite is
+** permitted to add content to the in-memory database as long as the total
+** size does not exceed M bytes.
+**
+** If the SQLITE_DESERIALIZE_FREEONCLOSE bit is set in F, then SQLite will
+** invoke sqlite3_free() on the serialization buffer when the database
+** connection closes.  If the SQLITE_DESERIALIZE_RESIZEABLE bit is set, then
+** SQLite will try to increase the buffer size using sqlite3_realloc64()
+** if writes on the database cause it to grow larger than M bytes.
+**
+** The sqlite3_deserialize() interface will fail with SQLITE_BUSY if the
+** database is currently in a read transaction or is involved in a backup
+** operation.
+**
+** If sqlite3_deserialize(D,S,P,N,M,F) fails for any reason and if the
+** SQLITE_DESERIALIZE_FREEONCLOSE bit is set in argument F, then
+** [sqlite3_free()] is invoked on argument P prior to returning.
+**
+** This interface is only available if SQLite is compiled with the
+** [SQLITE_ENABLE_DESERIALIZE] option.
+*/
+/* The database connection */
+/* Which DB to reopen with the deserialization */
+/* The serialized database content */
+/* Number bytes in the deserialization */
+/* Total size of buffer pData[] */
+/* Zero or more SQLITE_DESERIALIZE_* flags */
+int sqlite3_deserialize(
+    sqlite3* db,
+    const(char)* zSchema,
+    ubyte* pData,
+    sqlite3_int64 szDb,
+    sqlite3_int64 szBuf,
+    uint mFlags);
+
+/*
+** CAPI3REF: Flags for sqlite3_deserialize()
+**
+** The following are allowed values for 6th argument (the F argument) to
+** the [sqlite3_deserialize(D,S,P,N,M,F)] interface.
+**
+** The SQLITE_DESERIALIZE_FREEONCLOSE means that the database serialization
+** in the P argument is held in memory obtained from [sqlite3_malloc64()]
+** and that SQLite should take ownership of this memory and automatically
+** free it when it has finished using it.  Without this flag, the caller
+** is responsible for freeing any dynamically allocated memory.
+**
+** The SQLITE_DESERIALIZE_RESIZEABLE flag means that SQLite is allowed to
+** grow the size of the database using calls to [sqlite3_realloc64()].  This
+** flag should only be used if SQLITE_DESERIALIZE_FREEONCLOSE is also used.
+** Without this flag, the deserialized database cannot increase in size beyond
+** the number of bytes specified by the M parameter.
+**
+** The SQLITE_DESERIALIZE_READONLY flag means that the deserialized database
+** should be treated as read-only.
+*/
+enum SQLITE_DESERIALIZE_FREEONCLOSE = 1; /* Call sqlite3_free() on close */
+enum SQLITE_DESERIALIZE_RESIZEABLE = 2; /* Resize using sqlite3_realloc64() */
+enum SQLITE_DESERIALIZE_READONLY = 4; /* Database is read-only */
+
+/*
+** Undo the hack that converts floating point types to integer for
+** builds on processors without floating point support.
+*/
+
+/* End of the 'extern "C"' block */
+
+/* SQLITE3_H */
+
+/******** Begin file sqlite3rtree.h *********/
+/*
+** 2010 August 30
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+*/
+
+/* The double-precision datatype used by RTree depends on the
+** SQLITE_RTREE_INT_ONLY compile-time option.
+*/
+
+alias sqlite3_rtree_dbl = double;
+
+/*
+** Register a geometry callback named zGeom that can be used as part of an
+** R-Tree geometry query as follows:
+**
+**   SELECT ... FROM <rtree> WHERE <rtree col> MATCH $zGeom(... params ...)
+*/
+int sqlite3_rtree_geometry_callback(
+    sqlite3* db,
+    const(char)* zGeom,
+    int function(sqlite3_rtree_geometry*, int, sqlite3_rtree_dbl*, int*) xGeom,
+    void* pContext);
+
+/*
+** A pointer to a structure of the following type is passed as the first
+** argument to callbacks registered using rtree_geometry_callback().
+*/
+struct sqlite3_rtree_geometry
+{
+    void* pContext; /* Copy of pContext passed to s_r_g_c() */
+    int nParam; /* Size of array aParam[] */
+    sqlite3_rtree_dbl* aParam; /* Parameters passed to SQL geom function */
+    void* pUser; /* Callback implementation user data */
+    void function(void*) xDelUser; /* Called by SQLite to clean up pUser */
+}
+
+/*
+** Register a 2nd-generation geometry callback named zScore that can be
+** used as part of an R-Tree geometry query as follows:
+**
+**   SELECT ... FROM <rtree> WHERE <rtree col> MATCH $zQueryFunc(... params ...)
+*/
+int sqlite3_rtree_query_callback(
+    sqlite3* db,
+    const(char)* zQueryFunc,
+    int function(sqlite3_rtree_query_info*) xQueryFunc,
+    void* pContext,
+    void function(void*) xDestructor);
+
+/*
+** A pointer to a structure of the following type is passed as the
+** argument to scored geometry callback registered using
+** sqlite3_rtree_query_callback().
+**
+** Note that the first 5 fields of this structure are identical to
+** sqlite3_rtree_geometry.  This structure is a subclass of
+** sqlite3_rtree_geometry.
+*/
+struct sqlite3_rtree_query_info
+{
+    void* pContext; /* pContext from when function registered */
+    int nParam; /* Number of function parameters */
+    sqlite3_rtree_dbl* aParam; /* value of function parameters */
+    void* pUser; /* callback can use this, if desired */
+    void function(void*) xDelUser; /* function to free pUser */
+    sqlite3_rtree_dbl* aCoord; /* Coordinates of node or entry to check */
+    uint* anQueue; /* Number of pending entries in the queue */
+    int nCoord; /* Number of coordinates */
+    int iLevel; /* Level of current node or entry */
+    int mxLevel; /* The largest iLevel value in the tree */
+    sqlite3_int64 iRowid; /* Rowid for current entry */
+    sqlite3_rtree_dbl rParentScore; /* Score of parent node */
+    int eParentWithin; /* Visibility of parent node */
+    int eWithin; /* OUT: Visiblity */
+    sqlite3_rtree_dbl rScore; /* OUT: Write the score here */
+    /* The following fields are only available in 3.8.11 and later */
+    sqlite3_value** apSqlParam; /* Original SQL values of parameters */
+}
+
+/*
+** Allowed values for sqlite3_rtree_query.eWithin and .eParentWithin.
+*/
+enum NOT_WITHIN = 0; /* Object completely outside of query region */
+enum PARTLY_WITHIN = 1; /* Object partially overlaps query region */
+enum FULLY_WITHIN = 2; /* Object fully contained within query region */
+
+/* end of the 'extern "C"' block */
+
+/* ifndef _SQLITE3RTREE_H_ */
+
+/******** End of sqlite3rtree.h *********/
+/******** Begin file sqlite3session.h *********/
+
+/*
+** Make sure we can call this stuff from C++.
+*/
+
+/*
+** CAPI3REF: Session Object Handle
+**
+** An instance of this object is a [session] that can be used to
+** record changes to a database.
+*/
+
+/*
+** CAPI3REF: Changeset Iterator Handle
+**
+** An instance of this object acts as a cursor for iterating
+** over the elements of a [changeset] or [patchset].
+*/
+
+/*
+** CAPI3REF: Create A New Session Object
+** CONSTRUCTOR: sqlite3_session
+**
+** Create a new session object attached to database handle db. If successful,
+** a pointer to the new object is written to *ppSession and SQLITE_OK is
+** returned. If an error occurs, *ppSession is set to NULL and an SQLite
+** error code (e.g. SQLITE_NOMEM) is returned.
+**
+** It is possible to create multiple session objects attached to a single
+** database handle.
+**
+** Session objects created using this function should be deleted using the
+** [sqlite3session_delete()] function before the database handle that they
+** are attached to is itself closed. If the database handle is closed before
+** the session object is deleted, then the results of calling any session
+** module function, including [sqlite3session_delete()] on the session object
+** are undefined.
+**
+** Because the session module uses the [sqlite3_preupdate_hook()] API, it
+** is not possible for an application to register a pre-update hook on a
+** database handle that has one or more session objects attached. Nor is
+** it possible to create a session object attached to a database handle for
+** which a pre-update hook is already defined. The results of attempting
+** either of these things are undefined.
+**
+** The session object will be used to create changesets for tables in
+** database zDb, where zDb is either "main", or "temp", or the name of an
+** attached database. It is not an error if database zDb is not attached
+** to the database when the session object is created.
+*/
+
+/* Database handle */
+/* Name of db (e.g. "main") */
+/* OUT: New session object */
+
+/*
+** CAPI3REF: Delete A Session Object
+** DESTRUCTOR: sqlite3_session
+**
+** Delete a session object previously allocated using
+** [sqlite3session_create()]. Once a session object has been deleted, the
+** results of attempting to use pSession with any other session module
+** function are undefined.
+**
+** Session objects must be deleted before the database handle to which they
+** are attached is closed. Refer to the documentation for
+** [sqlite3session_create()] for details.
+*/
+
+/*
+** CAPI3REF: Enable Or Disable A Session Object
+** METHOD: sqlite3_session
+**
+** Enable or disable the recording of changes by a session object. When
+** enabled, a session object records changes made to the database. When
+** disabled - it does not. A newly created session object is enabled.
+** Refer to the documentation for [sqlite3session_changeset()] for further
+** details regarding how enabling and disabling a session object affects
+** the eventual changesets.
+**
+** Passing zero to this function disables the session. Passing a value
+** greater than zero enables it. Passing a value less than zero is a
+** no-op, and may be used to query the current state of the session.
+**
+** The return value indicates the final state of the session object: 0 if
+** the session is disabled, or 1 if it is enabled.
+*/
+
+/*
+** CAPI3REF: Set Or Clear the Indirect Change Flag
+** METHOD: sqlite3_session
+**
+** Each change recorded by a session object is marked as either direct or
+** indirect. A change is marked as indirect if either:
+**
+** <ul>
+**   <li> The session object "indirect" flag is set when the change is
+**        made, or
+**   <li> The change is made by an SQL trigger or foreign key action
+**        instead of directly as a result of a users SQL statement.
+** </ul>
+**
+** If a single row is affected by more than one operation within a session,
+** then the change is considered indirect if all operations meet the criteria
+** for an indirect change above, or direct otherwise.
+**
+** This function is used to set, clear or query the session object indirect
+** flag.  If the second argument passed to this function is zero, then the
+** indirect flag is cleared. If it is greater than zero, the indirect flag
+** is set. Passing a value less than zero does not modify the current value
+** of the indirect flag, and may be used to query the current state of the
+** indirect flag for the specified session object.
+**
+** The return value indicates the final state of the indirect flag: 0 if
+** it is clear, or 1 if it is set.
+*/
+
+/*
+** CAPI3REF: Attach A Table To A Session Object
+** METHOD: sqlite3_session
+**
+** If argument zTab is not NULL, then it is the name of a table to attach
+** to the session object passed as the first argument. All subsequent changes
+** made to the table while the session object is enabled will be recorded. See
+** documentation for [sqlite3session_changeset()] for further details.
+**
+** Or, if argument zTab is NULL, then changes are recorded for all tables
+** in the database. If additional tables are added to the database (by
+** executing "CREATE TABLE" statements) after this call is made, changes for
+** the new tables are also recorded.
+**
+** Changes can only be recorded for tables that have a PRIMARY KEY explicitly
+** defined as part of their CREATE TABLE statement. It does not matter if the
+** PRIMARY KEY is an "INTEGER PRIMARY KEY" (rowid alias) or not. The PRIMARY
+** KEY may consist of a single column, or may be a composite key.
+**
+** It is not an error if the named table does not exist in the database. Nor
+** is it an error if the named table does not have a PRIMARY KEY. However,
+** no changes will be recorded in either of these scenarios.
+**
+** Changes are not recorded for individual rows that have NULL values stored
+** in one or more of their PRIMARY KEY columns.
+**
+** SQLITE_OK is returned if the call completes without error. Or, if an error
+** occurs, an SQLite error code (e.g. SQLITE_NOMEM) is returned.
+**
+** <h3>Special sqlite_stat1 Handling</h3>
+**
+** As of SQLite version 3.22.0, the "sqlite_stat1" table is an exception to
+** some of the rules above. In SQLite, the schema of sqlite_stat1 is:
+**  <pre>
+**  &nbsp;     CREATE TABLE sqlite_stat1(tbl,idx,stat)
+**  </pre>
+**
+** Even though sqlite_stat1 does not have a PRIMARY KEY, changes are
+** recorded for it as if the PRIMARY KEY is (tbl,idx). Additionally, changes
+** are recorded for rows for which (idx IS NULL) is true. However, for such
+** rows a zero-length blob (SQL value X'') is stored in the changeset or
+** patchset instead of a NULL value. This allows such changesets to be
+** manipulated by legacy implementations of sqlite3changeset_invert(),
+** concat() and similar.
+**
+** The sqlite3changeset_apply() function automatically converts the
+** zero-length blob back to a NULL value when updating the sqlite_stat1
+** table. However, if the application calls sqlite3changeset_new(),
+** sqlite3changeset_old() or sqlite3changeset_conflict on a changeset
+** iterator directly (including on a changeset iterator passed to a
+** conflict-handler callback) then the X'' value is returned. The application
+** must translate X'' to NULL itself if required.
+**
+** Legacy (older than 3.22.0) versions of the sessions module cannot capture
+** changes made to the sqlite_stat1 table. Legacy versions of the
+** sqlite3changeset_apply() function silently ignore any modifications to the
+** sqlite_stat1 table that are part of a changeset or patchset.
+*/
+
+/* Session object */
+/* Table name */
+
+/*
+** CAPI3REF: Set a table filter on a Session Object.
+** METHOD: sqlite3_session
+**
+** The second argument (xFilter) is the "filter callback". For changes to rows
+** in tables that are not attached to the Session object, the filter is called
+** to determine whether changes to the table's rows should be tracked or not.
+** If xFilter returns 0, changes is not tracked. Note that once a table is
+** attached, xFilter will not be called again.
+*/
+
+/* Session object */
+
+/* Copy of third arg to _filter_table() */
+/* Table name */
+
+/* First argument passed to xFilter */
+
+/*
+** CAPI3REF: Generate A Changeset From A Session Object
+** METHOD: sqlite3_session
+**
+** Obtain a changeset containing changes to the tables attached to the
+** session object passed as the first argument. If successful,
+** set *ppChangeset to point to a buffer containing the changeset
+** and *pnChangeset to the size of the changeset in bytes before returning
+** SQLITE_OK. If an error occurs, set both *ppChangeset and *pnChangeset to
+** zero and return an SQLite error code.
+**
+** A changeset consists of zero or more INSERT, UPDATE and/or DELETE changes,
+** each representing a change to a single row of an attached table. An INSERT
+** change contains the values of each field of a new database row. A DELETE
+** contains the original values of each field of a deleted database row. An
+** UPDATE change contains the original values of each field of an updated
+** database row along with the updated values for each updated non-primary-key
+** column. It is not possible for an UPDATE change to represent a change that
+** modifies the values of primary key columns. If such a change is made, it
+** is represented in a changeset as a DELETE followed by an INSERT.
+**
+** Changes are not recorded for rows that have NULL values stored in one or
+** more of their PRIMARY KEY columns. If such a row is inserted or deleted,
+** no corresponding change is present in the changesets returned by this
+** function. If an existing row with one or more NULL values stored in
+** PRIMARY KEY columns is updated so that all PRIMARY KEY columns are non-NULL,
+** only an INSERT is appears in the changeset. Similarly, if an existing row
+** with non-NULL PRIMARY KEY values is updated so that one or more of its
+** PRIMARY KEY columns are set to NULL, the resulting changeset contains a
+** DELETE change only.
+**
+** The contents of a changeset may be traversed using an iterator created
+** using the [sqlite3changeset_start()] API. A changeset may be applied to
+** a database with a compatible schema using the [sqlite3changeset_apply()]
+** API.
+**
+** Within a changeset generated by this function, all changes related to a
+** single table are grouped together. In other words, when iterating through
+** a changeset or when applying a changeset to a database, all changes related
+** to a single table are processed before moving on to the next table. Tables
+** are sorted in the same order in which they were attached (or auto-attached)
+** to the sqlite3_session object. The order in which the changes related to
+** a single table are stored is undefined.
+**
+** Following a successful call to this function, it is the responsibility of
+** the caller to eventually free the buffer that *ppChangeset points to using
+** [sqlite3_free()].
+**
+** <h3>Changeset Generation</h3>
+**
+** Once a table has been attached to a session object, the session object
+** records the primary key values of all new rows inserted into the table.
+** It also records the original primary key and other column values of any
+** deleted or updated rows. For each unique primary key value, data is only
+** recorded once - the first time a row with said primary key is inserted,
+** updated or deleted in the lifetime of the session.
+**
+** There is one exception to the previous paragraph: when a row is inserted,
+** updated or deleted, if one or more of its primary key columns contain a
+** NULL value, no record of the change is made.
+**
+** The session object therefore accumulates two types of records - those
+** that consist of primary key values only (created when the user inserts
+** a new record) and those that consist of the primary key values and the
+** original values of other table columns (created when the users deletes
+** or updates a record).
+**
+** When this function is called, the requested changeset is created using
+** both the accumulated records and the current contents of the database
+** file. Specifically:
+**
+** <ul>
+**   <li> For each record generated by an insert, the database is queried
+**        for a row with a matching primary key. If one is found, an INSERT
+**        change is added to the changeset. If no such row is found, no change
+**        is added to the changeset.
+**
+**   <li> For each record generated by an update or delete, the database is
+**        queried for a row with a matching primary key. If such a row is
+**        found and one or more of the non-primary key fields have been
+**        modified from their original values, an UPDATE change is added to
+**        the changeset. Or, if no such row is found in the table, a DELETE
+**        change is added to the changeset. If there is a row with a matching
+**        primary key in the database, but all fields contain their original
+**        values, no change is added to the changeset.
+** </ul>
+**
+** This means, amongst other things, that if a row is inserted and then later
+** deleted while a session object is active, neither the insert nor the delete
+** will be present in the changeset. Or if a row is deleted and then later a
+** row with the same primary key values inserted while a session object is
+** active, the resulting changeset will contain an UPDATE change instead of
+** a DELETE and an INSERT.
+**
+** When a session object is disabled (see the [sqlite3session_enable()] API),
+** it does not accumulate records when rows are inserted, updated or deleted.
+** This may appear to have some counter-intuitive effects if a single row
+** is written to more than once during a session. For example, if a row
+** is inserted while a session object is enabled, then later deleted while
+** the same session object is disabled, no INSERT record will appear in the
+** changeset, even though the delete took place while the session was disabled.
+** Or, if one field of a row is updated while a session is disabled, and
+** another field of the same row is updated while the session is enabled, the
+** resulting changeset will contain an UPDATE change that updates both fields.
+*/
+
+/* Session object */
+/* OUT: Size of buffer at *ppChangeset */
+/* OUT: Buffer containing changeset */
+
+/*
+** CAPI3REF: Load The Difference Between Tables Into A Session
+** METHOD: sqlite3_session
+**
+** If it is not already attached to the session object passed as the first
+** argument, this function attaches table zTbl in the same manner as the
+** [sqlite3session_attach()] function. If zTbl does not exist, or if it
+** does not have a primary key, this function is a no-op (but does not return
+** an error).
+**
+** Argument zFromDb must be the name of a database ("main", "temp" etc.)
+** attached to the same database handle as the session object that contains
+** a table compatible with the table attached to the session by this function.
+** A table is considered compatible if it:
+**
+** <ul>
+**   <li> Has the same name,
+**   <li> Has the same set of columns declared in the same order, and
+**   <li> Has the same PRIMARY KEY definition.
+** </ul>
+**
+** If the tables are not compatible, SQLITE_SCHEMA is returned. If the tables
+** are compatible but do not have any PRIMARY KEY columns, it is not an error
+** but no changes are added to the session object. As with other session
+** APIs, tables without PRIMARY KEYs are simply ignored.
+**
+** This function adds a set of changes to the session object that could be
+** used to update the table in database zFrom (call this the "from-table")
+** so that its content is the same as the table attached to the session
+** object (call this the "to-table"). Specifically:
+**
+** <ul>
+**   <li> For each row (primary key) that exists in the to-table but not in
+**     the from-table, an INSERT record is added to the session object.
+**
+**   <li> For each row (primary key) that exists in the to-table but not in
+**     the from-table, a DELETE record is added to the session object.
+**
+**   <li> For each row (primary key) that exists in both tables, but features
+**     different non-PK values in each, an UPDATE record is added to the
+**     session.
+** </ul>
+**
+** To clarify, if this function is called and then a changeset constructed
+** using [sqlite3session_changeset()], then after applying that changeset to
+** database zFrom the contents of the two compatible tables would be
+** identical.
+**
+** It an error if database zFrom does not exist or does not contain the
+** required compatible table.
+**
+** If the operation successful, SQLITE_OK is returned. Otherwise, an SQLite
+** error code. In this case, if argument pzErrMsg is not NULL, *pzErrMsg
+** may be set to point to a buffer containing an English language error
+** message. It is the responsibility of the caller to free this buffer using
+** sqlite3_free().
+*/
+
+/*
+** CAPI3REF: Generate A Patchset From A Session Object
+** METHOD: sqlite3_session
+**
+** The differences between a patchset and a changeset are that:
+**
+** <ul>
+**   <li> DELETE records consist of the primary key fields only. The
+**        original values of other fields are omitted.
+**   <li> The original values of any modified fields are omitted from
+**        UPDATE records.
+** </ul>
+**
+** A patchset blob may be used with up to date versions of all
+** sqlite3changeset_xxx API functions except for sqlite3changeset_invert(),
+** which returns SQLITE_CORRUPT if it is passed a patchset. Similarly,
+** attempting to use a patchset blob with old versions of the
+** sqlite3changeset_xxx APIs also provokes an SQLITE_CORRUPT error.
+**
+** Because the non-primary key "old.*" fields are omitted, no
+** SQLITE_CHANGESET_DATA conflicts can be detected or reported if a patchset
+** is passed to the sqlite3changeset_apply() API. Other conflict types work
+** in the same way as for changesets.
+**
+** Changes within a patchset are ordered in the same way as for changesets
+** generated by the sqlite3session_changeset() function (i.e. all changes for
+** a single table are grouped together, tables appear in the order in which
+** they were attached to the session object).
+*/
+
+/* Session object */
+/* OUT: Size of buffer at *ppPatchset */
+/* OUT: Buffer containing patchset */
+
+/*
+** CAPI3REF: Test if a changeset has recorded any changes.
+**
+** Return non-zero if no changes to attached tables have been recorded by
+** the session object passed as the first argument. Otherwise, if one or
+** more changes have been recorded, return zero.
+**
+** Even if this function returns zero, it is possible that calling
+** [sqlite3session_changeset()] on the session handle may still return a
+** changeset that contains no changes. This can happen when a row in
+** an attached table is modified and then later on the original values
+** are restored. However, if this function returns non-zero, then it is
+** guaranteed that a call to sqlite3session_changeset() will return a
+** changeset containing zero changes.
+*/
+
+/*
+** CAPI3REF: Create An Iterator To Traverse A Changeset
+** CONSTRUCTOR: sqlite3_changeset_iter
+**
+** Create an iterator used to iterate through the contents of a changeset.
+** If successful, *pp is set to point to the iterator handle and SQLITE_OK
+** is returned. Otherwise, if an error occurs, *pp is set to zero and an
+** SQLite error code is returned.
+**
+** The following functions can be used to advance and query a changeset
+** iterator created by this function:
+**
+** <ul>
+**   <li> [sqlite3changeset_next()]
+**   <li> [sqlite3changeset_op()]
+**   <li> [sqlite3changeset_new()]
+**   <li> [sqlite3changeset_old()]
+** </ul>
+**
+** It is the responsibility of the caller to eventually destroy the iterator
+** by passing it to [sqlite3changeset_finalize()]. The buffer containing the
+** changeset (pChangeset) must remain valid until after the iterator is
+** destroyed.
+**
+** Assuming the changeset blob was created by one of the
+** [sqlite3session_changeset()], [sqlite3changeset_concat()] or
+** [sqlite3changeset_invert()] functions, all changes within the changeset
+** that apply to a single table are grouped together. This means that when
+** an application iterates through a changeset using an iterator created by
+** this function, all changes that relate to a single table are visited
+** consecutively. There is no chance that the iterator will visit a change
+** the applies to table X, then one for table Y, and then later on visit
+** another change for table X.
+*/
+
+/* OUT: New changeset iterator handle */
+/* Size of changeset blob in bytes */
+/* Pointer to blob containing changeset */
+
+/*
+** CAPI3REF: Advance A Changeset Iterator
+** METHOD: sqlite3_changeset_iter
+**
+** This function may only be used with iterators created by function
+** [sqlite3changeset_start()]. If it is called on an iterator passed to
+** a conflict-handler callback by [sqlite3changeset_apply()], SQLITE_MISUSE
+** is returned and the call has no effect.
+**
+** Immediately after an iterator is created by sqlite3changeset_start(), it
+** does not point to any change in the changeset. Assuming the changeset
+** is not empty, the first call to this function advances the iterator to
+** point to the first change in the changeset. Each subsequent call advances
+** the iterator to point to the next change in the changeset (if any). If
+** no error occurs and the iterator points to a valid change after a call
+** to sqlite3changeset_next() has advanced it, SQLITE_ROW is returned.
+** Otherwise, if all changes in the changeset have already been visited,
+** SQLITE_DONE is returned.
+**
+** If an error occurs, an SQLite error code is returned. Possible error
+** codes include SQLITE_CORRUPT (if the changeset buffer is corrupt) or
+** SQLITE_NOMEM.
+*/
+
+/*
+** CAPI3REF: Obtain The Current Operation From A Changeset Iterator
+** METHOD: sqlite3_changeset_iter
+**
+** The pIter argument passed to this function may either be an iterator
+** passed to a conflict-handler by [sqlite3changeset_apply()], or an iterator
+** created by [sqlite3changeset_start()]. In the latter case, the most recent
+** call to [sqlite3changeset_next()] must have returned [SQLITE_ROW]. If this
+** is not the case, this function returns [SQLITE_MISUSE].
+**
+** If argument pzTab is not NULL, then *pzTab is set to point to a
+** nul-terminated utf-8 encoded string containing the name of the table
+** affected by the current change. The buffer remains valid until either
+** sqlite3changeset_next() is called on the iterator or until the
+** conflict-handler function returns. If pnCol is not NULL, then *pnCol is
+** set to the number of columns in the table affected by the change. If
+** pbIncorrect is not NULL, then *pbIndirect is set to true (1) if the change
+** is an indirect change, or false (0) otherwise. See the documentation for
+** [sqlite3session_indirect()] for a description of direct and indirect
+** changes. Finally, if pOp is not NULL, then *pOp is set to one of
+** [SQLITE_INSERT], [SQLITE_DELETE] or [SQLITE_UPDATE], depending on the
+** type of change that the iterator currently points to.
+**
+** If no error occurs, SQLITE_OK is returned. If an error does occur, an
+** SQLite error code is returned. The values of the output variables may not
+** be trusted in this case.
+*/
+
+/* Iterator object */
+/* OUT: Pointer to table name */
+/* OUT: Number of columns in table */
+/* OUT: SQLITE_INSERT, DELETE or UPDATE */
+/* OUT: True for an 'indirect' change */
+
+/*
+** CAPI3REF: Obtain The Primary Key Definition Of A Table
+** METHOD: sqlite3_changeset_iter
+**
+** For each modified table, a changeset includes the following:
+**
+** <ul>
+**   <li> The number of columns in the table, and
+**   <li> Which of those columns make up the tables PRIMARY KEY.
+** </ul>
+**
+** This function is used to find which columns comprise the PRIMARY KEY of
+** the table modified by the change that iterator pIter currently points to.
+** If successful, *pabPK is set to point to an array of nCol entries, where
+** nCol is the number of columns in the table. Elements of *pabPK are set to
+** 0x01 if the corresponding column is part of the tables primary key, or
+** 0x00 if it is not.
+**
+** If argument pnCol is not NULL, then *pnCol is set to the number of columns
+** in the table.
+**
+** If this function is called when the iterator does not point to a valid
+** entry, SQLITE_MISUSE is returned and the output variables zeroed. Otherwise,
+** SQLITE_OK is returned and the output variables populated as described
+** above.
+*/
+
+/* Iterator object */
+/* OUT: Array of boolean - true for PK cols */
+/* OUT: Number of entries in output array */
+
+/*
+** CAPI3REF: Obtain old.* Values From A Changeset Iterator
+** METHOD: sqlite3_changeset_iter
+**
+** The pIter argument passed to this function may either be an iterator
+** passed to a conflict-handler by [sqlite3changeset_apply()], or an iterator
+** created by [sqlite3changeset_start()]. In the latter case, the most recent
+** call to [sqlite3changeset_next()] must have returned SQLITE_ROW.
+** Furthermore, it may only be called if the type of change that the iterator
+** currently points to is either [SQLITE_DELETE] or [SQLITE_UPDATE]. Otherwise,
+** this function returns [SQLITE_MISUSE] and sets *ppValue to NULL.
+**
+** Argument iVal must be greater than or equal to 0, and less than the number
+** of columns in the table affected by the current change. Otherwise,
+** [SQLITE_RANGE] is returned and *ppValue is set to NULL.
+**
+** If successful, this function sets *ppValue to point to a protected
+** sqlite3_value object containing the iVal'th value from the vector of
+** original row values stored as part of the UPDATE or DELETE change and
+** returns SQLITE_OK. The name of the function comes from the fact that this
+** is similar to the "old.*" columns available to update or delete triggers.
+**
+** If some other error occurs (e.g. an OOM condition), an SQLite error code
+** is returned and *ppValue is set to NULL.
+*/
+
+/* Changeset iterator */
+/* Column number */
+/* OUT: Old value (or NULL pointer) */
+
+/*
+** CAPI3REF: Obtain new.* Values From A Changeset Iterator
+** METHOD: sqlite3_changeset_iter
+**
+** The pIter argument passed to this function may either be an iterator
+** passed to a conflict-handler by [sqlite3changeset_apply()], or an iterator
+** created by [sqlite3changeset_start()]. In the latter case, the most recent
+** call to [sqlite3changeset_next()] must have returned SQLITE_ROW.
+** Furthermore, it may only be called if the type of change that the iterator
+** currently points to is either [SQLITE_UPDATE] or [SQLITE_INSERT]. Otherwise,
+** this function returns [SQLITE_MISUSE] and sets *ppValue to NULL.
+**
+** Argument iVal must be greater than or equal to 0, and less than the number
+** of columns in the table affected by the current change. Otherwise,
+** [SQLITE_RANGE] is returned and *ppValue is set to NULL.
+**
+** If successful, this function sets *ppValue to point to a protected
+** sqlite3_value object containing the iVal'th value from the vector of
+** new row values stored as part of the UPDATE or INSERT change and
+** returns SQLITE_OK. If the change is an UPDATE and does not include
+** a new value for the requested column, *ppValue is set to NULL and
+** SQLITE_OK returned. The name of the function comes from the fact that
+** this is similar to the "new.*" columns available to update or delete
+** triggers.
+**
+** If some other error occurs (e.g. an OOM condition), an SQLite error code
+** is returned and *ppValue is set to NULL.
+*/
+
+/* Changeset iterator */
+/* Column number */
+/* OUT: New value (or NULL pointer) */
+
+/*
+** CAPI3REF: Obtain Conflicting Row Values From A Changeset Iterator
+** METHOD: sqlite3_changeset_iter
+**
+** This function should only be used with iterator objects passed to a
+** conflict-handler callback by [sqlite3changeset_apply()] with either
+** [SQLITE_CHANGESET_DATA] or [SQLITE_CHANGESET_CONFLICT]. If this function
+** is called on any other iterator, [SQLITE_MISUSE] is returned and *ppValue
+** is set to NULL.
+**
+** Argument iVal must be greater than or equal to 0, and less than the number
+** of columns in the table affected by the current change. Otherwise,
+** [SQLITE_RANGE] is returned and *ppValue is set to NULL.
+**
+** If successful, this function sets *ppValue to point to a protected
+** sqlite3_value object containing the iVal'th value from the
+** "conflicting row" associated with the current conflict-handler callback
+** and returns SQLITE_OK.
+**
+** If some other error occurs (e.g. an OOM condition), an SQLite error code
+** is returned and *ppValue is set to NULL.
+*/
+
+/* Changeset iterator */
+/* Column number */
+/* OUT: Value from conflicting row */
+
+/*
+** CAPI3REF: Determine The Number Of Foreign Key Constraint Violations
+** METHOD: sqlite3_changeset_iter
+**
+** This function may only be called with an iterator passed to an
+** SQLITE_CHANGESET_FOREIGN_KEY conflict handler callback. In this case
+** it sets the output variable to the total number of known foreign key
+** violations in the destination database and returns SQLITE_OK.
+**
+** In all other cases this function returns SQLITE_MISUSE.
+*/
+
+/* Changeset iterator */
+/* OUT: Number of FK violations */
+
+/*
+** CAPI3REF: Finalize A Changeset Iterator
+** METHOD: sqlite3_changeset_iter
+**
+** This function is used to finalize an iterator allocated with
+** [sqlite3changeset_start()].
+**
+** This function should only be called on iterators created using the
+** [sqlite3changeset_start()] function. If an application calls this
+** function with an iterator passed to a conflict-handler by
+** [sqlite3changeset_apply()], [SQLITE_MISUSE] is immediately returned and the
+** call has no effect.
+**
+** If an error was encountered within a call to an sqlite3changeset_xxx()
+** function (for example an [SQLITE_CORRUPT] in [sqlite3changeset_next()] or an
+** [SQLITE_NOMEM] in [sqlite3changeset_new()]) then an error code corresponding
+** to that error is returned by this function. Otherwise, SQLITE_OK is
+** returned. This is to allow the following pattern (pseudo-code):
+**
+** <pre>
+**   sqlite3changeset_start();
+**   while( SQLITE_ROW==sqlite3changeset_next() ){
+**     // Do something with change.
+**   }
+**   rc = sqlite3changeset_finalize();
+**   if( rc!=SQLITE_OK ){
+**     // An error has occurred
+**   }
+** </pre>
+*/
+
+/*
+** CAPI3REF: Invert A Changeset
+**
+** This function is used to "invert" a changeset object. Applying an inverted
+** changeset to a database reverses the effects of applying the uninverted
+** changeset. Specifically:
+**
+** <ul>
+**   <li> Each DELETE change is changed to an INSERT, and
+**   <li> Each INSERT change is changed to a DELETE, and
+**   <li> For each UPDATE change, the old.* and new.* values are exchanged.
+** </ul>
+**
+** This function does not change the order in which changes appear within
+** the changeset. It merely reverses the sense of each individual change.
+**
+** If successful, a pointer to a buffer containing the inverted changeset
+** is stored in *ppOut, the size of the same buffer is stored in *pnOut, and
+** SQLITE_OK is returned. If an error occurs, both *pnOut and *ppOut are
+** zeroed and an SQLite error code returned.
+**
+** It is the responsibility of the caller to eventually call sqlite3_free()
+** on the *ppOut pointer to free the buffer allocation following a successful
+** call to this function.
+**
+** WARNING/TODO: This function currently assumes that the input is a valid
+** changeset. If it is not, the results are undefined.
+*/
+
+/* Input changeset */
+/* OUT: Inverse of input */
+
+/*
+** CAPI3REF: Concatenate Two Changeset Objects
+**
+** This function is used to concatenate two changesets, A and B, into a
+** single changeset. The result is a changeset equivalent to applying
+** changeset A followed by changeset B.
+**
+** This function combines the two input changesets using an
+** sqlite3_changegroup object. Calling it produces similar results as the
+** following code fragment:
+**
+** <pre>
+**   sqlite3_changegroup *pGrp;
+**   rc = sqlite3_changegroup_new(&pGrp);
+**   if( rc==SQLITE_OK ) rc = sqlite3changegroup_add(pGrp, nA, pA);
+**   if( rc==SQLITE_OK ) rc = sqlite3changegroup_add(pGrp, nB, pB);
+**   if( rc==SQLITE_OK ){
+**     rc = sqlite3changegroup_output(pGrp, pnOut, ppOut);
+**   }else{
+**     *ppOut = 0;
+**     *pnOut = 0;
+**   }
+** </pre>
+**
+** Refer to the sqlite3_changegroup documentation below for details.
+*/
+
+/* Number of bytes in buffer pA */
+/* Pointer to buffer containing changeset A */
+/* Number of bytes in buffer pB */
+/* Pointer to buffer containing changeset B */
+/* OUT: Number of bytes in output changeset */
+/* OUT: Buffer containing output changeset */
+
+/*
+** CAPI3REF: Changegroup Handle
+**
+** A changegroup is an object used to combine two or more
+** [changesets] or [patchsets]
+*/
+
+/*
+** CAPI3REF: Create A New Changegroup Object
+** CONSTRUCTOR: sqlite3_changegroup
+**
+** An sqlite3_changegroup object is used to combine two or more changesets
+** (or patchsets) into a single changeset (or patchset). A single changegroup
+** object may combine changesets or patchsets, but not both. The output is
+** always in the same format as the input.
+**
+** If successful, this function returns SQLITE_OK and populates (*pp) with
+** a pointer to a new sqlite3_changegroup object before returning. The caller
+** should eventually free the returned object using a call to
+** sqlite3changegroup_delete(). If an error occurs, an SQLite error code
+** (i.e. SQLITE_NOMEM) is returned and *pp is set to NULL.
+**
+** The usual usage pattern for an sqlite3_changegroup object is as follows:
+**
+** <ul>
+**   <li> It is created using a call to sqlite3changegroup_new().
+**
+**   <li> Zero or more changesets (or patchsets) are added to the object
+**        by calling sqlite3changegroup_add().
+**
+**   <li> The result of combining all input changesets together is obtained
+**        by the application via a call to sqlite3changegroup_output().
+**
+**   <li> The object is deleted using a call to sqlite3changegroup_delete().
+** </ul>
+**
+** Any number of calls to add() and output() may be made between the calls to
+** new() and delete(), and in any order.
+**
+** As well as the regular sqlite3changegroup_add() and
+** sqlite3changegroup_output() functions, also available are the streaming
+** versions sqlite3changegroup_add_strm() and sqlite3changegroup_output_strm().
+*/
+
+/*
+** CAPI3REF: Add A Changeset To A Changegroup
+** METHOD: sqlite3_changegroup
+**
+** Add all changes within the changeset (or patchset) in buffer pData (size
+** nData bytes) to the changegroup.
+**
+** If the buffer contains a patchset, then all prior calls to this function
+** on the same changegroup object must also have specified patchsets. Or, if
+** the buffer contains a changeset, so must have the earlier calls to this
+** function. Otherwise, SQLITE_ERROR is returned and no changes are added
+** to the changegroup.
+**
+** Rows within the changeset and changegroup are identified by the values in
+** their PRIMARY KEY columns. A change in the changeset is considered to
+** apply to the same row as a change already present in the changegroup if
+** the two rows have the same primary key.
+**
+** Changes to rows that do not already appear in the changegroup are
+** simply copied into it. Or, if both the new changeset and the changegroup
+** contain changes that apply to a single row, the final contents of the
+** changegroup depends on the type of each change, as follows:
+**
+** <table border=1 style="margin-left:8ex;margin-right:8ex">
+**   <tr><th style="white-space:pre">Existing Change  </th>
+**       <th style="white-space:pre">New Change       </th>
+**       <th>Output Change
+**   <tr><td>INSERT <td>INSERT <td>
+**       The new change is ignored. This case does not occur if the new
+**       changeset was recorded immediately after the changesets already
+**       added to the changegroup.
+**   <tr><td>INSERT <td>UPDATE <td>
+**       The INSERT change remains in the changegroup. The values in the
+**       INSERT change are modified as if the row was inserted by the
+**       existing change and then updated according to the new change.
+**   <tr><td>INSERT <td>DELETE <td>
+**       The existing INSERT is removed from the changegroup. The DELETE is
+**       not added.
+**   <tr><td>UPDATE <td>INSERT <td>
+**       The new change is ignored. This case does not occur if the new
+**       changeset was recorded immediately after the changesets already
+**       added to the changegroup.
+**   <tr><td>UPDATE <td>UPDATE <td>
+**       The existing UPDATE remains within the changegroup. It is amended
+**       so that the accompanying values are as if the row was updated once
+**       by the existing change and then again by the new change.
+**   <tr><td>UPDATE <td>DELETE <td>
+**       The existing UPDATE is replaced by the new DELETE within the
+**       changegroup.
+**   <tr><td>DELETE <td>INSERT <td>
+**       If one or more of the column values in the row inserted by the
+**       new change differ from those in the row deleted by the existing
+**       change, the existing DELETE is replaced by an UPDATE within the
+**       changegroup. Otherwise, if the inserted row is exactly the same
+**       as the deleted row, the existing DELETE is simply discarded.
+**   <tr><td>DELETE <td>UPDATE <td>
+**       The new change is ignored. This case does not occur if the new
+**       changeset was recorded immediately after the changesets already
+**       added to the changegroup.
+**   <tr><td>DELETE <td>DELETE <td>
+**       The new change is ignored. This case does not occur if the new
+**       changeset was recorded immediately after the changesets already
+**       added to the changegroup.
+** </table>
+**
+** If the new changeset contains changes to a table that is already present
+** in the changegroup, then the number of columns and the position of the
+** primary key columns for the table must be consistent. If this is not the
+** case, this function fails with SQLITE_SCHEMA. If the input changeset
+** appears to be corrupt and the corruption is detected, SQLITE_CORRUPT is
+** returned. Or, if an out-of-memory condition occurs during processing, this
+** function returns SQLITE_NOMEM. In all cases, if an error occurs the
+** final contents of the changegroup is undefined.
+**
+** If no error occurs, SQLITE_OK is returned.
+*/
+
+/*
+** CAPI3REF: Obtain A Composite Changeset From A Changegroup
+** METHOD: sqlite3_changegroup
+**
+** Obtain a buffer containing a changeset (or patchset) representing the
+** current contents of the changegroup. If the inputs to the changegroup
+** were themselves changesets, the output is a changeset. Or, if the
+** inputs were patchsets, the output is also a patchset.
+**
+** As with the output of the sqlite3session_changeset() and
+** sqlite3session_patchset() functions, all changes related to a single
+** table are grouped together in the output of this function. Tables appear
+** in the same order as for the very first changeset added to the changegroup.
+** If the second or subsequent changesets added to the changegroup contain
+** changes for tables that do not appear in the first changeset, they are
+** appended onto the end of the output changeset, again in the order in
+** which they are first encountered.
+**
+** If an error occurs, an SQLite error code is returned and the output
+** variables (*pnData) and (*ppData) are set to 0. Otherwise, SQLITE_OK
+** is returned and the output variables are set to the size of and a
+** pointer to the output buffer, respectively. In this case it is the
+** responsibility of the caller to eventually free the buffer using a
+** call to sqlite3_free().
+*/
+
+/* OUT: Size of output buffer in bytes */
+/* OUT: Pointer to output buffer */
+
+/*
+** CAPI3REF: Delete A Changegroup Object
+** DESTRUCTOR: sqlite3_changegroup
+*/
+
+/*
+** CAPI3REF: Apply A Changeset To A Database
+**
+** Apply a changeset or patchset to a database. These functions attempt to
+** update the "main" database attached to handle db with the changes found in
+** the changeset passed via the second and third arguments.
+**
+** The fourth argument (xFilter) passed to these functions is the "filter
+** callback". If it is not NULL, then for each table affected by at least one
+** change in the changeset, the filter callback is invoked with
+** the table name as the second argument, and a copy of the context pointer
+** passed as the sixth argument as the first. If the "filter callback"
+** returns zero, then no attempt is made to apply any changes to the table.
+** Otherwise, if the return value is non-zero or the xFilter argument to
+** is NULL, all changes related to the table are attempted.
+**
+** For each table that is not excluded by the filter callback, this function
+** tests that the target database contains a compatible table. A table is
+** considered compatible if all of the following are true:
+**
+** <ul>
+**   <li> The table has the same name as the name recorded in the
+**        changeset, and
+**   <li> The table has at least as many columns as recorded in the
+**        changeset, and
+**   <li> The table has primary key columns in the same position as
+**        recorded in the changeset.
+** </ul>
+**
+** If there is no compatible table, it is not an error, but none of the
+** changes associated with the table are applied. A warning message is issued
+** via the sqlite3_log() mechanism with the error code SQLITE_SCHEMA. At most
+** one such warning is issued for each table in the changeset.
+**
+** For each change for which there is a compatible table, an attempt is made
+** to modify the table contents according to the UPDATE, INSERT or DELETE
+** change. If a change cannot be applied cleanly, the conflict handler
+** function passed as the fifth argument to sqlite3changeset_apply() may be
+** invoked. A description of exactly when the conflict handler is invoked for
+** each type of change is below.
+**
+** Unlike the xFilter argument, xConflict may not be passed NULL. The results
+** of passing anything other than a valid function pointer as the xConflict
+** argument are undefined.
+**
+** Each time the conflict handler function is invoked, it must return one
+** of [SQLITE_CHANGESET_OMIT], [SQLITE_CHANGESET_ABORT] or
+** [SQLITE_CHANGESET_REPLACE]. SQLITE_CHANGESET_REPLACE may only be returned
+** if the second argument passed to the conflict handler is either
+** SQLITE_CHANGESET_DATA or SQLITE_CHANGESET_CONFLICT. If the conflict-handler
+** returns an illegal value, any changes already made are rolled back and
+** the call to sqlite3changeset_apply() returns SQLITE_MISUSE. Different
+** actions are taken by sqlite3changeset_apply() depending on the value
+** returned by each invocation of the conflict-handler function. Refer to
+** the documentation for the three
+** [SQLITE_CHANGESET_OMIT|available return values] for details.
+**
+** <dl>
+** <dt>DELETE Changes<dd>
+**   For each DELETE change, the function checks if the target database
+**   contains a row with the same primary key value (or values) as the
+**   original row values stored in the changeset. If it does, and the values
+**   stored in all non-primary key columns also match the values stored in
+**   the changeset the row is deleted from the target database.
+**
+**   If a row with matching primary key values is found, but one or more of
+**   the non-primary key fields contains a value different from the original
+**   row value stored in the changeset, the conflict-handler function is
+**   invoked with [SQLITE_CHANGESET_DATA] as the second argument. If the
+**   database table has more columns than are recorded in the changeset,
+**   only the values of those non-primary key fields are compared against
+**   the current database contents - any trailing database table columns
+**   are ignored.
+**
+**   If no row with matching primary key values is found in the database,
+**   the conflict-handler function is invoked with [SQLITE_CHANGESET_NOTFOUND]
+**   passed as the second argument.
+**
+**   If the DELETE operation is attempted, but SQLite returns SQLITE_CONSTRAINT
+**   (which can only happen if a foreign key constraint is violated), the
+**   conflict-handler function is invoked with [SQLITE_CHANGESET_CONSTRAINT]
+**   passed as the second argument. This includes the case where the DELETE
+**   operation is attempted because an earlier call to the conflict handler
+**   function returned [SQLITE_CHANGESET_REPLACE].
+**
+** <dt>INSERT Changes<dd>
+**   For each INSERT change, an attempt is made to insert the new row into
+**   the database. If the changeset row contains fewer fields than the
+**   database table, the trailing fields are populated with their default
+**   values.
+**
+**   If the attempt to insert the row fails because the database already
+**   contains a row with the same primary key values, the conflict handler
+**   function is invoked with the second argument set to
+**   [SQLITE_CHANGESET_CONFLICT].
+**
+**   If the attempt to insert the row fails because of some other constraint
+**   violation (e.g. NOT NULL or UNIQUE), the conflict handler function is
+**   invoked with the second argument set to [SQLITE_CHANGESET_CONSTRAINT].
+**   This includes the case where the INSERT operation is re-attempted because
+**   an earlier call to the conflict handler function returned
+**   [SQLITE_CHANGESET_REPLACE].
+**
+** <dt>UPDATE Changes<dd>
+**   For each UPDATE change, the function checks if the target database
+**   contains a row with the same primary key value (or values) as the
+**   original row values stored in the changeset. If it does, and the values
+**   stored in all modified non-primary key columns also match the values
+**   stored in the changeset the row is updated within the target database.
+**
+**   If a row with matching primary key values is found, but one or more of
+**   the modified non-primary key fields contains a value different from an
+**   original row value stored in the changeset, the conflict-handler function
+**   is invoked with [SQLITE_CHANGESET_DATA] as the second argument. Since
+**   UPDATE changes only contain values for non-primary key fields that are
+**   to be modified, only those fields need to match the original values to
+**   avoid the SQLITE_CHANGESET_DATA conflict-handler callback.
+**
+**   If no row with matching primary key values is found in the database,
+**   the conflict-handler function is invoked with [SQLITE_CHANGESET_NOTFOUND]
+**   passed as the second argument.
+**
+**   If the UPDATE operation is attempted, but SQLite returns
+**   SQLITE_CONSTRAINT, the conflict-handler function is invoked with
+**   [SQLITE_CHANGESET_CONSTRAINT] passed as the second argument.
+**   This includes the case where the UPDATE operation is attempted after
+**   an earlier call to the conflict handler function returned
+**   [SQLITE_CHANGESET_REPLACE].
+** </dl>
+**
+** It is safe to execute SQL statements, including those that write to the
+** table that the callback related to, from within the xConflict callback.
+** This can be used to further customize the applications conflict
+** resolution strategy.
+**
+** All changes made by these functions are enclosed in a savepoint transaction.
+** If any other error (aside from a constraint failure when attempting to
+** write to the target database) occurs, then the savepoint transaction is
+** rolled back, restoring the target database to its original state, and an
+** SQLite error code returned.
+**
+** If the output parameters (ppRebase) and (pnRebase) are non-NULL and
+** the input is a changeset (not a patchset), then sqlite3changeset_apply_v2()
+** may set (*ppRebase) to point to a "rebase" that may be used with the
+** sqlite3_rebaser APIs buffer before returning. In this case (*pnRebase)
+** is set to the size of the buffer in bytes. It is the responsibility of the
+** caller to eventually free any such buffer using sqlite3_free(). The buffer
+** is only allocated and populated if one or more conflicts were encountered
+** while applying the patchset. See comments surrounding the sqlite3_rebaser
+** APIs for further details.
+**
+** The behavior of sqlite3changeset_apply_v2() and its streaming equivalent
+** may be modified by passing a combination of
+** [SQLITE_CHANGESETAPPLY_NOSAVEPOINT | supported flags] as the 9th parameter.
+**
+** Note that the sqlite3changeset_apply_v2() API is still <b>experimental</b>
+** and therefore subject to change.
+*/
+
+/* Apply change to "main" db of this handle */
+/* Size of changeset in bytes */
+/* Changeset blob */
+
+/* Copy of sixth arg to _apply() */
+/* Table name */
+
+/* Copy of sixth arg to _apply() */
+/* DATA, MISSING, CONFLICT, CONSTRAINT */
+/* Handle describing change and conflict */
+
+/* First argument passed to xConflict */
+
+/* Apply change to "main" db of this handle */
+/* Size of changeset in bytes */
+/* Changeset blob */
+
+/* Copy of sixth arg to _apply() */
+/* Table name */
+
+/* Copy of sixth arg to _apply() */
+/* DATA, MISSING, CONFLICT, CONSTRAINT */
+/* Handle describing change and conflict */
+
+/* First argument passed to xConflict */
+/* OUT: Rebase data */
+/* Combination of SESSION_APPLY_* flags */
+
+/*
+** CAPI3REF: Flags for sqlite3changeset_apply_v2
+**
+** The following flags may passed via the 9th parameter to
+** [sqlite3changeset_apply_v2] and [sqlite3changeset_apply_v2_strm]:
+**
+** <dl>
+** <dt>SQLITE_CHANGESETAPPLY_NOSAVEPOINT <dd>
+**   Usually, the sessions module encloses all operations performed by
+**   a single call to apply_v2() or apply_v2_strm() in a [SAVEPOINT]. The
+**   SAVEPOINT is committed if the changeset or patchset is successfully
+**   applied, or rolled back if an error occurs. Specifying this flag
+**   causes the sessions module to omit this savepoint. In this case, if the
+**   caller has an open transaction or savepoint when apply_v2() is called,
+**   it may revert the partially applied changeset by rolling it back.
+*/
+
+/*
+** CAPI3REF: Constants Passed To The Conflict Handler
+**
+** Values that may be passed as the second argument to a conflict-handler.
+**
+** <dl>
+** <dt>SQLITE_CHANGESET_DATA<dd>
+**   The conflict handler is invoked with CHANGESET_DATA as the second argument
+**   when processing a DELETE or UPDATE change if a row with the required
+**   PRIMARY KEY fields is present in the database, but one or more other
+**   (non primary-key) fields modified by the update do not contain the
+**   expected "before" values.
+**
+**   The conflicting row, in this case, is the database row with the matching
+**   primary key.
+**
+** <dt>SQLITE_CHANGESET_NOTFOUND<dd>
+**   The conflict handler is invoked with CHANGESET_NOTFOUND as the second
+**   argument when processing a DELETE or UPDATE change if a row with the
+**   required PRIMARY KEY fields is not present in the database.
+**
+**   There is no conflicting row in this case. The results of invoking the
+**   sqlite3changeset_conflict() API are undefined.
+**
+** <dt>SQLITE_CHANGESET_CONFLICT<dd>
+**   CHANGESET_CONFLICT is passed as the second argument to the conflict
+**   handler while processing an INSERT change if the operation would result
+**   in duplicate primary key values.
+**
+**   The conflicting row in this case is the database row with the matching
+**   primary key.
+**
+** <dt>SQLITE_CHANGESET_FOREIGN_KEY<dd>
+**   If foreign key handling is enabled, and applying a changeset leaves the
+**   database in a state containing foreign key violations, the conflict
+**   handler is invoked with CHANGESET_FOREIGN_KEY as the second argument
+**   exactly once before the changeset is committed. If the conflict handler
+**   returns CHANGESET_OMIT, the changes, including those that caused the
+**   foreign key constraint violation, are committed. Or, if it returns
+**   CHANGESET_ABORT, the changeset is rolled back.
+**
+**   No current or conflicting row information is provided. The only function
+**   it is possible to call on the supplied sqlite3_changeset_iter handle
+**   is sqlite3changeset_fk_conflicts().
+**
+** <dt>SQLITE_CHANGESET_CONSTRAINT<dd>
+**   If any other constraint violation occurs while applying a change (i.e.
+**   a UNIQUE, CHECK or NOT NULL constraint), the conflict handler is
+**   invoked with CHANGESET_CONSTRAINT as the second argument.
+**
+**   There is no conflicting row in this case. The results of invoking the
+**   sqlite3changeset_conflict() API are undefined.
+**
+** </dl>
+*/
+
+/*
+** CAPI3REF: Constants Returned By The Conflict Handler
+**
+** A conflict handler callback must return one of the following three values.
+**
+** <dl>
+** <dt>SQLITE_CHANGESET_OMIT<dd>
+**   If a conflict handler returns this value no special action is taken. The
+**   change that caused the conflict is not applied. The session module
+**   continues to the next change in the changeset.
+**
+** <dt>SQLITE_CHANGESET_REPLACE<dd>
+**   This value may only be returned if the second argument to the conflict
+**   handler was SQLITE_CHANGESET_DATA or SQLITE_CHANGESET_CONFLICT. If this
+**   is not the case, any changes applied so far are rolled back and the
+**   call to sqlite3changeset_apply() returns SQLITE_MISUSE.
+**
+**   If CHANGESET_REPLACE is returned by an SQLITE_CHANGESET_DATA conflict
+**   handler, then the conflicting row is either updated or deleted, depending
+**   on the type of change.
+**
+**   If CHANGESET_REPLACE is returned by an SQLITE_CHANGESET_CONFLICT conflict
+**   handler, then the conflicting row is removed from the database and a
+**   second attempt to apply the change is made. If this second attempt fails,
+**   the original row is restored to the database before continuing.
+**
+** <dt>SQLITE_CHANGESET_ABORT<dd>
+**   If this value is returned, any changes applied so far are rolled back
+**   and the call to sqlite3changeset_apply() returns SQLITE_ABORT.
+** </dl>
+*/
+
+/*
+** CAPI3REF: Rebasing changesets
+** EXPERIMENTAL
+**
+** Suppose there is a site hosting a database in state S0. And that
+** modifications are made that move that database to state S1 and a
+** changeset recorded (the "local" changeset). Then, a changeset based
+** on S0 is received from another site (the "remote" changeset) and
+** applied to the database. The database is then in state
+** (S1+"remote"), where the exact state depends on any conflict
+** resolution decisions (OMIT or REPLACE) made while applying "remote".
+** Rebasing a changeset is to update it to take those conflict
+** resolution decisions into account, so that the same conflicts
+** do not have to be resolved elsewhere in the network.
+**
+** For example, if both the local and remote changesets contain an
+** INSERT of the same key on "CREATE TABLE t1(a PRIMARY KEY, b)":
+**
+**   local:  INSERT INTO t1 VALUES(1, 'v1');
+**   remote: INSERT INTO t1 VALUES(1, 'v2');
+**
+** and the conflict resolution is REPLACE, then the INSERT change is
+** removed from the local changeset (it was overridden). Or, if the
+** conflict resolution was "OMIT", then the local changeset is modified
+** to instead contain:
+**
+**           UPDATE t1 SET b = 'v2' WHERE a=1;
+**
+** Changes within the local changeset are rebased as follows:
+**
+** <dl>
+** <dt>Local INSERT<dd>
+**   This may only conflict with a remote INSERT. If the conflict
+**   resolution was OMIT, then add an UPDATE change to the rebased
+**   changeset. Or, if the conflict resolution was REPLACE, add
+**   nothing to the rebased changeset.
+**
+** <dt>Local DELETE<dd>
+**   This may conflict with a remote UPDATE or DELETE. In both cases the
+**   only possible resolution is OMIT. If the remote operation was a
+**   DELETE, then add no change to the rebased changeset. If the remote
+**   operation was an UPDATE, then the old.* fields of change are updated
+**   to reflect the new.* values in the UPDATE.
+**
+** <dt>Local UPDATE<dd>
+**   This may conflict with a remote UPDATE or DELETE. If it conflicts
+**   with a DELETE, and the conflict resolution was OMIT, then the update
+**   is changed into an INSERT. Any undefined values in the new.* record
+**   from the update change are filled in using the old.* values from
+**   the conflicting DELETE. Or, if the conflict resolution was REPLACE,
+**   the UPDATE change is simply omitted from the rebased changeset.
+**
+**   If conflict is with a remote UPDATE and the resolution is OMIT, then
+**   the old.* values are rebased using the new.* values in the remote
+**   change. Or, if the resolution is REPLACE, then the change is copied
+**   into the rebased changeset with updates to columns also updated by
+**   the conflicting remote UPDATE removed. If this means no columns would
+**   be updated, the change is omitted.
+** </dl>
+**
+** A local change may be rebased against multiple remote changes
+** simultaneously. If a single key is modified by multiple remote
+** changesets, they are combined as follows before the local changeset
+** is rebased:
+**
+** <ul>
+**    <li> If there has been one or more REPLACE resolutions on a
+**         key, it is rebased according to a REPLACE.
+**
+**    <li> If there have been no REPLACE resolutions on a key, then
+**         the local changeset is rebased according to the most recent
+**         of the OMIT resolutions.
+** </ul>
+**
+** Note that conflict resolutions from multiple remote changesets are
+** combined on a per-field basis, not per-row. This means that in the
+** case of multiple remote UPDATE operations, some fields of a single
+** local change may be rebased for REPLACE while others are rebased for
+** OMIT.
+**
+** In order to rebase a local changeset, the remote changeset must first
+** be applied to the local database using sqlite3changeset_apply_v2() and
+** the buffer of rebase information captured. Then:
+**
+** <ol>
+**   <li> An sqlite3_rebaser object is created by calling
+**        sqlite3rebaser_create().
+**   <li> The new object is configured with the rebase buffer obtained from
+**        sqlite3changeset_apply_v2() by calling sqlite3rebaser_configure().
+**        If the local changeset is to be rebased against multiple remote
+**        changesets, then sqlite3rebaser_configure() should be called
+**        multiple times, in the same order that the multiple
+**        sqlite3changeset_apply_v2() calls were made.
+**   <li> Each local changeset is rebased by calling sqlite3rebaser_rebase().
+**   <li> The sqlite3_rebaser object is deleted by calling
+**        sqlite3rebaser_delete().
+** </ol>
+*/
+
+/*
+** CAPI3REF: Create a changeset rebaser object.
+** EXPERIMENTAL
+**
+** Allocate a new changeset rebaser object. If successful, set (*ppNew) to
+** point to the new object and return SQLITE_OK. Otherwise, if an error
+** occurs, return an SQLite error code (e.g. SQLITE_NOMEM) and set (*ppNew)
+** to NULL.
+*/
+
+/*
+** CAPI3REF: Configure a changeset rebaser object.
+** EXPERIMENTAL
+**
+** Configure the changeset rebaser object to rebase changesets according
+** to the conflict resolutions described by buffer pRebase (size nRebase
+** bytes), which must have been obtained from a previous call to
+** sqlite3changeset_apply_v2().
+*/
+
+/*
+** CAPI3REF: Rebase a changeset
+** EXPERIMENTAL
+**
+** Argument pIn must point to a buffer containing a changeset nIn bytes
+** in size. This function allocates and populates a buffer with a copy
+** of the changeset rebased rebased according to the configuration of the
+** rebaser object passed as the first argument. If successful, (*ppOut)
+** is set to point to the new buffer containing the rebased changset and
+** (*pnOut) to its size in bytes and SQLITE_OK returned. It is the
+** responsibility of the caller to eventually free the new buffer using
+** sqlite3_free(). Otherwise, if an error occurs, (*ppOut) and (*pnOut)
+** are set to zero and an SQLite error code returned.
+*/
+
+/*
+** CAPI3REF: Delete a changeset rebaser object.
+** EXPERIMENTAL
+**
+** Delete the changeset rebaser object and all associated resources. There
+** should be one call to this function for each successful invocation
+** of sqlite3rebaser_create().
+*/
+
+/*
+** CAPI3REF: Streaming Versions of API functions.
+**
+** The six streaming API xxx_strm() functions serve similar purposes to the
+** corresponding non-streaming API functions:
+**
+** <table border=1 style="margin-left:8ex;margin-right:8ex">
+**   <tr><th>Streaming function<th>Non-streaming equivalent</th>
+**   <tr><td>sqlite3changeset_apply_strm<td>[sqlite3changeset_apply]
+**   <tr><td>sqlite3changeset_apply_strm_v2<td>[sqlite3changeset_apply_v2]
+**   <tr><td>sqlite3changeset_concat_strm<td>[sqlite3changeset_concat]
+**   <tr><td>sqlite3changeset_invert_strm<td>[sqlite3changeset_invert]
+**   <tr><td>sqlite3changeset_start_strm<td>[sqlite3changeset_start]
+**   <tr><td>sqlite3session_changeset_strm<td>[sqlite3session_changeset]
+**   <tr><td>sqlite3session_patchset_strm<td>[sqlite3session_patchset]
+** </table>
+**
+** Non-streaming functions that accept changesets (or patchsets) as input
+** require that the entire changeset be stored in a single buffer in memory.
+** Similarly, those that return a changeset or patchset do so by returning
+** a pointer to a single large buffer allocated using sqlite3_malloc().
+** Normally this is convenient. However, if an application running in a
+** low-memory environment is required to handle very large changesets, the
+** large contiguous memory allocations required can become onerous.
+**
+** In order to avoid this problem, instead of a single large buffer, input
+** is passed to a streaming API functions by way of a callback function that
+** the sessions module invokes to incrementally request input data as it is
+** required. In all cases, a pair of API function parameters such as
+**
+**  <pre>
+**  &nbsp;     int nChangeset,
+**  &nbsp;     void *pChangeset,
+**  </pre>
+**
+** Is replaced by:
+**
+**  <pre>
+**  &nbsp;     int (*xInput)(void *pIn, void *pData, int *pnData),
+**  &nbsp;     void *pIn,
+**  </pre>
+**
+** Each time the xInput callback is invoked by the sessions module, the first
+** argument passed is a copy of the supplied pIn context pointer. The second
+** argument, pData, points to a buffer (*pnData) bytes in size. Assuming no
+** error occurs the xInput method should copy up to (*pnData) bytes of data
+** into the buffer and set (*pnData) to the actual number of bytes copied
+** before returning SQLITE_OK. If the input is completely exhausted, (*pnData)
+** should be set to zero to indicate this. Or, if an error occurs, an SQLite
+** error code should be returned. In all cases, if an xInput callback returns
+** an error, all processing is abandoned and the streaming API function
+** returns a copy of the error code to the caller.
+**
+** In the case of sqlite3changeset_start_strm(), the xInput callback may be
+** invoked by the sessions module at any point during the lifetime of the
+** iterator. If such an xInput callback returns an error, the iterator enters
+** an error state, whereby all subsequent calls to iterator functions
+** immediately fail with the same error code as returned by xInput.
+**
+** Similarly, streaming API functions that return changesets (or patchsets)
+** return them in chunks by way of a callback function instead of via a
+** pointer to a single large buffer. In this case, a pair of parameters such
+** as:
+**
+**  <pre>
+**  &nbsp;     int *pnChangeset,
+**  &nbsp;     void **ppChangeset,
+**  </pre>
+**
+** Is replaced by:
+**
+**  <pre>
+**  &nbsp;     int (*xOutput)(void *pOut, const void *pData, int nData),
+**  &nbsp;     void *pOut
+**  </pre>
+**
+** The xOutput callback is invoked zero or more times to return data to
+** the application. The first parameter passed to each call is a copy of the
+** pOut pointer supplied by the application. The second parameter, pData,
+** points to a buffer nData bytes in size containing the chunk of output
+** data being returned. If the xOutput callback successfully processes the
+** supplied data, it should return SQLITE_OK to indicate success. Otherwise,
+** it should return some other SQLite error code. In this case processing
+** is immediately abandoned and the streaming API function returns a copy
+** of the xOutput error code to the application.
+**
+** The sessions module never invokes an xOutput callback with the third
+** parameter set to a value less than or equal to zero. Other than this,
+** no guarantees are made as to the size of the chunks of data returned.
+*/
+
+/* Apply change to "main" db of this handle */
+/* Input function */
+/* First arg for xInput */
+
+/* Copy of sixth arg to _apply() */
+/* Table name */
+
+/* Copy of sixth arg to _apply() */
+/* DATA, MISSING, CONFLICT, CONSTRAINT */
+/* Handle describing change and conflict */
+
+/* First argument passed to xConflict */
+
+/* Apply change to "main" db of this handle */
+/* Input function */
+/* First arg for xInput */
+
+/* Copy of sixth arg to _apply() */
+/* Table name */
+
+/* Copy of sixth arg to _apply() */
+/* DATA, MISSING, CONFLICT, CONSTRAINT */
+/* Handle describing change and conflict */
+
+/* First argument passed to xConflict */
+
+/*
+** Make sure we can call this stuff from C++.
+*/
+
+/* !defined(__SQLITESESSION_H_) && defined(SQLITE_ENABLE_SESSION) */
+
+/******** End of sqlite3session.h *********/
+/******** Begin file fts5.h *********/
+/*
+** 2014 May 31
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+******************************************************************************
+**
+** Interfaces to extend FTS5. Using the interfaces defined in this file,
+** FTS5 may be extended with:
+**
+**     * custom tokenizers, and
+**     * custom auxiliary functions.
+*/
+
+/*************************************************************************
+** CUSTOM AUXILIARY FUNCTIONS
+**
+** Virtual table implementations may overload SQL functions by implementing
+** the sqlite3_module.xFindFunction() method.
+*/
+
+struct Fts5Context;
+
+/* API offered by current FTS version */
+/* First arg to pass to pApi functions */
+/* Context for returning result/error */
+/* Number of values in apVal[] array */
+/* Array of trailing arguments */
+alias fts5_extension_function = void function(const(Fts5ExtensionApi)* pApi, Fts5Context* pFts, sqlite3_context* pCtx, int nVal, sqlite3_value** apVal);
+
+struct Fts5PhraseIter
+{
+    const(ubyte)* a;
+    const(ubyte)* b;
+}
+
+/*
+** EXTENSION API FUNCTIONS
+**
+** xUserData(pFts):
+**   Return a copy of the context pointer the extension function was
+**   registered with.
+**
+** xColumnTotalSize(pFts, iCol, pnToken):
+**   If parameter iCol is less than zero, set output variable *pnToken
+**   to the total number of tokens in the FTS5 table. Or, if iCol is
+**   non-negative but less than the number of columns in the table, return
+**   the total number of tokens in column iCol, considering all rows in
+**   the FTS5 table.
+**
+**   If parameter iCol is greater than or equal to the number of columns
+**   in the table, SQLITE_RANGE is returned. Or, if an error occurs (e.g.
+**   an OOM condition or IO error), an appropriate SQLite error code is
+**   returned.
+**
+** xColumnCount(pFts):
+**   Return the number of columns in the table.
+**
+** xColumnSize(pFts, iCol, pnToken):
+**   If parameter iCol is less than zero, set output variable *pnToken
+**   to the total number of tokens in the current row. Or, if iCol is
+**   non-negative but less than the number of columns in the table, set
+**   *pnToken to the number of tokens in column iCol of the current row.
+**
+**   If parameter iCol is greater than or equal to the number of columns
+**   in the table, SQLITE_RANGE is returned. Or, if an error occurs (e.g.
+**   an OOM condition or IO error), an appropriate SQLite error code is
+**   returned.
+**
+**   This function may be quite inefficient if used with an FTS5 table
+**   created with the "columnsize=0" option.
+**
+** xColumnText:
+**   This function attempts to retrieve the text of column iCol of the
+**   current document. If successful, (*pz) is set to point to a buffer
+**   containing the text in utf-8 encoding, (*pn) is set to the size in bytes
+**   (not characters) of the buffer and SQLITE_OK is returned. Otherwise,
+**   if an error occurs, an SQLite error code is returned and the final values
+**   of (*pz) and (*pn) are undefined.
+**
+** xPhraseCount:
+**   Returns the number of phrases in the current query expression.
+**
+** xPhraseSize:
+**   Returns the number of tokens in phrase iPhrase of the query. Phrases
+**   are numbered starting from zero.
+**
+** xInstCount:
+**   Set *pnInst to the total number of occurrences of all phrases within
+**   the query within the current row. Return SQLITE_OK if successful, or
+**   an error code (i.e. SQLITE_NOMEM) if an error occurs.
+**
+**   This API can be quite slow if used with an FTS5 table created with the
+**   "detail=none" or "detail=column" option. If the FTS5 table is created
+**   with either "detail=none" or "detail=column" and "content=" option
+**   (i.e. if it is a contentless table), then this API always returns 0.
+**
+** xInst:
+**   Query for the details of phrase match iIdx within the current row.
+**   Phrase matches are numbered starting from zero, so the iIdx argument
+**   should be greater than or equal to zero and smaller than the value
+**   output by xInstCount().
+**
+**   Usually, output parameter *piPhrase is set to the phrase number, *piCol
+**   to the column in which it occurs and *piOff the token offset of the
+**   first token of the phrase. The exception is if the table was created
+**   with the offsets=0 option specified. In this case *piOff is always
+**   set to -1.
+**
+**   Returns SQLITE_OK if successful, or an error code (i.e. SQLITE_NOMEM)
+**   if an error occurs.
+**
+**   This API can be quite slow if used with an FTS5 table created with the
+**   "detail=none" or "detail=column" option.
+**
+** xRowid:
+**   Returns the rowid of the current row.
+**
+** xTokenize:
+**   Tokenize text using the tokenizer belonging to the FTS5 table.
+**
+** xQueryPhrase(pFts5, iPhrase, pUserData, xCallback):
+**   This API function is used to query the FTS table for phrase iPhrase
+**   of the current query. Specifically, a query equivalent to:
+**
+**       ... FROM ftstable WHERE ftstable MATCH $p ORDER BY rowid
+**
+**   with $p set to a phrase equivalent to the phrase iPhrase of the
+**   current query is executed. Any column filter that applies to
+**   phrase iPhrase of the current query is included in $p. For each
+**   row visited, the callback function passed as the fourth argument
+**   is invoked. The context and API objects passed to the callback
+**   function may be used to access the properties of each matched row.
+**   Invoking Api.xUserData() returns a copy of the pointer passed as
+**   the third argument to pUserData.
+**
+**   If the callback function returns any value other than SQLITE_OK, the
+**   query is abandoned and the xQueryPhrase function returns immediately.
+**   If the returned value is SQLITE_DONE, xQueryPhrase returns SQLITE_OK.
+**   Otherwise, the error code is propagated upwards.
+**
+**   If the query runs to completion without incident, SQLITE_OK is returned.
+**   Or, if some error occurs before the query completes or is aborted by
+**   the callback, an SQLite error code is returned.
+**
+**
+** xSetAuxdata(pFts5, pAux, xDelete)
+**
+**   Save the pointer passed as the second argument as the extension functions
+**   "auxiliary data". The pointer may then be retrieved by the current or any
+**   future invocation of the same fts5 extension function made as part of
+**   of the same MATCH query using the xGetAuxdata() API.
+**
+**   Each extension function is allocated a single auxiliary data slot for
+**   each FTS query (MATCH expression). If the extension function is invoked
+**   more than once for a single FTS query, then all invocations share a
+**   single auxiliary data context.
+**
+**   If there is already an auxiliary data pointer when this function is
+**   invoked, then it is replaced by the new pointer. If an xDelete callback
+**   was specified along with the original pointer, it is invoked at this
+**   point.
+**
+**   The xDelete callback, if one is specified, is also invoked on the
+**   auxiliary data pointer after the FTS5 query has finished.
+**
+**   If an error (e.g. an OOM condition) occurs within this function, an
+**   the auxiliary data is set to NULL and an error code returned. If the
+**   xDelete parameter was not NULL, it is invoked on the auxiliary data
+**   pointer before returning.
+**
+**
+** xGetAuxdata(pFts5, bClear)
+**
+**   Returns the current auxiliary data pointer for the fts5 extension
+**   function. See the xSetAuxdata() method for details.
+**
+**   If the bClear argument is non-zero, then the auxiliary data is cleared
+**   (set to NULL) before this function returns. In this case the xDelete,
+**   if any, is not invoked.
+**
+**
+** xRowCount(pFts5, pnRow)
+**
+**   This function is used to retrieve the total number of rows in the table.
+**   In other words, the same value that would be returned by:
+**
+**        SELECT count(*) FROM ftstable;
+**
+** xPhraseFirst()
+**   This function is used, along with type Fts5PhraseIter and the xPhraseNext
+**   method, to iterate through all instances of a single query phrase within
+**   the current row. This is the same information as is accessible via the
+**   xInstCount/xInst APIs. While the xInstCount/xInst APIs are more convenient
+**   to use, this API may be faster under some circumstances. To iterate
+**   through instances of phrase iPhrase, use the following code:
+**
+**       Fts5PhraseIter iter;
+**       int iCol, iOff;
+**       for(pApi->xPhraseFirst(pFts, iPhrase, &iter, &iCol, &iOff);
+**           iCol>=0;
+**           pApi->xPhraseNext(pFts, &iter, &iCol, &iOff)
+**       ){
+**         // An instance of phrase iPhrase at offset iOff of column iCol
+**       }
+**
+**   The Fts5PhraseIter structure is defined above. Applications should not
+**   modify this structure directly - it should only be used as shown above
+**   with the xPhraseFirst() and xPhraseNext() API methods (and by
+**   xPhraseFirstColumn() and xPhraseNextColumn() as illustrated below).
+**
+**   This API can be quite slow if used with an FTS5 table created with the
+**   "detail=none" or "detail=column" option. If the FTS5 table is created
+**   with either "detail=none" or "detail=column" and "content=" option
+**   (i.e. if it is a contentless table), then this API always iterates
+**   through an empty set (all calls to xPhraseFirst() set iCol to -1).
+**
+** xPhraseNext()
+**   See xPhraseFirst above.
+**
+** xPhraseFirstColumn()
+**   This function and xPhraseNextColumn() are similar to the xPhraseFirst()
+**   and xPhraseNext() APIs described above. The difference is that instead
+**   of iterating through all instances of a phrase in the current row, these
+**   APIs are used to iterate through the set of columns in the current row
+**   that contain one or more instances of a specified phrase. For example:
+**
+**       Fts5PhraseIter iter;
+**       int iCol;
+**       for(pApi->xPhraseFirstColumn(pFts, iPhrase, &iter, &iCol);
+**           iCol>=0;
+**           pApi->xPhraseNextColumn(pFts, &iter, &iCol)
+**       ){
+**         // Column iCol contains at least one instance of phrase iPhrase
+**       }
+**
+**   This API can be quite slow if used with an FTS5 table created with the
+**   "detail=none" option. If the FTS5 table is created with either
+**   "detail=none" "content=" option (i.e. if it is a contentless table),
+**   then this API always iterates through an empty set (all calls to
+**   xPhraseFirstColumn() set iCol to -1).
+**
+**   The information accessed using this API and its companion
+**   xPhraseFirstColumn() may also be obtained using xPhraseFirst/xPhraseNext
+**   (or xInst/xInstCount). The chief advantage of this API is that it is
+**   significantly more efficient than those alternatives when used with
+**   "detail=column" tables.
+**
+** xPhraseNextColumn()
+**   See xPhraseFirstColumn above.
+*/
+struct Fts5ExtensionApi
+{
+    int iVersion; /* Currently always set to 3 */
+
+    void* function(Fts5Context*) xUserData;
+
+    int function(Fts5Context*) xColumnCount;
+    int function(Fts5Context*, sqlite3_int64* pnRow) xRowCount;
+    int function(Fts5Context*, int iCol, sqlite3_int64* pnToken) xColumnTotalSize;
+
+    /* Text to tokenize */
+    /* Context passed to xToken() */
+    /* Callback */
+    int function(Fts5Context*, const(char)* pText, int nText, void* pCtx, int function(void*, int, const(char)*, int, int, int) xToken) xTokenize;
+
+    int function(Fts5Context*) xPhraseCount;
+    int function(Fts5Context*, int iPhrase) xPhraseSize;
+
+    int function(Fts5Context*, int* pnInst) xInstCount;
+    int function(Fts5Context*, int iIdx, int* piPhrase, int* piCol, int* piOff) xInst;
+
+    sqlite3_int64 function(Fts5Context*) xRowid;
+    int function(Fts5Context*, int iCol, const(char*)* pz, int* pn) xColumnText;
+    int function(Fts5Context*, int iCol, int* pnToken) xColumnSize;
+
+    int function(Fts5Context*, int iPhrase, void* pUserData, int function(const(Fts5ExtensionApi)*, Fts5Context*, void*)) xQueryPhrase;
+    int function(Fts5Context*, void* pAux, void function(void*) xDelete) xSetAuxdata;
+    void* function(Fts5Context*, int bClear) xGetAuxdata;
+
+    int function(Fts5Context*, int iPhrase, Fts5PhraseIter*, int*, int*) xPhraseFirst;
+    void function(Fts5Context*, Fts5PhraseIter*, int* piCol, int* piOff) xPhraseNext;
+
+    int function(Fts5Context*, int iPhrase, Fts5PhraseIter*, int*) xPhraseFirstColumn;
+    void function(Fts5Context*, Fts5PhraseIter*, int* piCol) xPhraseNextColumn;
+}
+
+/*
+** CUSTOM AUXILIARY FUNCTIONS
+*************************************************************************/
+
+/*************************************************************************
+** CUSTOM TOKENIZERS
+**
+** Applications may also register custom tokenizer types. A tokenizer
+** is registered by providing fts5 with a populated instance of the
+** following structure. All structure methods must be defined, setting
+** any member of the fts5_tokenizer struct to NULL leads to undefined
+** behaviour. The structure methods are expected to function as follows:
+**
+** xCreate:
+**   This function is used to allocate and initialize a tokenizer instance.
+**   A tokenizer instance is required to actually tokenize text.
+**
+**   The first argument passed to this function is a copy of the (void*)
+**   pointer provided by the application when the fts5_tokenizer object
+**   was registered with FTS5 (the third argument to xCreateTokenizer()).
+**   The second and third arguments are an array of nul-terminated strings
+**   containing the tokenizer arguments, if any, specified following the
+**   tokenizer name as part of the CREATE VIRTUAL TABLE statement used
+**   to create the FTS5 table.
+**
+**   The final argument is an output variable. If successful, (*ppOut)
+**   should be set to point to the new tokenizer handle and SQLITE_OK
+**   returned. If an error occurs, some value other than SQLITE_OK should
+**   be returned. In this case, fts5 assumes that the final value of *ppOut
+**   is undefined.
+**
+** xDelete:
+**   This function is invoked to delete a tokenizer handle previously
+**   allocated using xCreate(). Fts5 guarantees that this function will
+**   be invoked exactly once for each successful call to xCreate().
+**
+** xTokenize:
+**   This function is expected to tokenize the nText byte string indicated
+**   by argument pText. pText may or may not be nul-terminated. The first
+**   argument passed to this function is a pointer to an Fts5Tokenizer object
+**   returned by an earlier call to xCreate().
+**
+**   The second argument indicates the reason that FTS5 is requesting
+**   tokenization of the supplied text. This is always one of the following
+**   four values:
+**
+**   <ul><li> <b>FTS5_TOKENIZE_DOCUMENT</b> - A document is being inserted into
+**            or removed from the FTS table. The tokenizer is being invoked to
+**            determine the set of tokens to add to (or delete from) the
+**            FTS index.
+**
+**       <li> <b>FTS5_TOKENIZE_QUERY</b> - A MATCH query is being executed
+**            against the FTS index. The tokenizer is being called to tokenize
+**            a bareword or quoted string specified as part of the query.
+**
+**       <li> <b>(FTS5_TOKENIZE_QUERY | FTS5_TOKENIZE_PREFIX)</b> - Same as
+**            FTS5_TOKENIZE_QUERY, except that the bareword or quoted string is
+**            followed by a "*" character, indicating that the last token
+**            returned by the tokenizer will be treated as a token prefix.
+**
+**       <li> <b>FTS5_TOKENIZE_AUX</b> - The tokenizer is being invoked to
+**            satisfy an fts5_api.xTokenize() request made by an auxiliary
+**            function. Or an fts5_api.xColumnSize() request made by the same
+**            on a columnsize=0 database.
+**   </ul>
+**
+**   For each token in the input string, the supplied callback xToken() must
+**   be invoked. The first argument to it should be a copy of the pointer
+**   passed as the second argument to xTokenize(). The third and fourth
+**   arguments are a pointer to a buffer containing the token text, and the
+**   size of the token in bytes. The 4th and 5th arguments are the byte offsets
+**   of the first byte of and first byte immediately following the text from
+**   which the token is derived within the input.
+**
+**   The second argument passed to the xToken() callback ("tflags") should
+**   normally be set to 0. The exception is if the tokenizer supports
+**   synonyms. In this case see the discussion below for details.
+**
+**   FTS5 assumes the xToken() callback is invoked for each token in the
+**   order that they occur within the input text.
+**
+**   If an xToken() callback returns any value other than SQLITE_OK, then
+**   the tokenization should be abandoned and the xTokenize() method should
+**   immediately return a copy of the xToken() return value. Or, if the
+**   input buffer is exhausted, xTokenize() should return SQLITE_OK. Finally,
+**   if an error occurs with the xTokenize() implementation itself, it
+**   may abandon the tokenization and return any error code other than
+**   SQLITE_OK or SQLITE_DONE.
+**
+** SYNONYM SUPPORT
+**
+**   Custom tokenizers may also support synonyms. Consider a case in which a
+**   user wishes to query for a phrase such as "first place". Using the
+**   built-in tokenizers, the FTS5 query 'first + place' will match instances
+**   of "first place" within the document set, but not alternative forms
+**   such as "1st place". In some applications, it would be better to match
+**   all instances of "first place" or "1st place" regardless of which form
+**   the user specified in the MATCH query text.
+**
+**   There are several ways to approach this in FTS5:
+**
+**   <ol><li> By mapping all synonyms to a single token. In this case, the
+**            In the above example, this means that the tokenizer returns the
+**            same token for inputs "first" and "1st". Say that token is in
+**            fact "first", so that when the user inserts the document "I won
+**            1st place" entries are added to the index for tokens "i", "won",
+**            "first" and "place". If the user then queries for '1st + place',
+**            the tokenizer substitutes "first" for "1st" and the query works
+**            as expected.
+**
+**       <li> By adding multiple synonyms for a single term to the FTS index.
+**            In this case, when tokenizing query text, the tokenizer may
+**            provide multiple synonyms for a single term within the document.
+**            FTS5 then queries the index for each synonym individually. For
+**            example, faced with the query:
+**
+**   <codeblock>
+**     ... MATCH 'first place'</codeblock>
+**
+**            the tokenizer offers both "1st" and "first" as synonyms for the
+**            first token in the MATCH query and FTS5 effectively runs a query
+**            similar to:
+**
+**   <codeblock>
+**     ... MATCH '(first OR 1st) place'</codeblock>
+**
+**            except that, for the purposes of auxiliary functions, the query
+**            still appears to contain just two phrases - "(first OR 1st)"
+**            being treated as a single phrase.
+**
+**       <li> By adding multiple synonyms for a single term to the FTS index.
+**            Using this method, when tokenizing document text, the tokenizer
+**            provides multiple synonyms for each token. So that when a
+**            document such as "I won first place" is tokenized, entries are
+**            added to the FTS index for "i", "won", "first", "1st" and
+**            "place".
+**
+**            This way, even if the tokenizer does not provide synonyms
+**            when tokenizing query text (it should not - to do would be
+**            inefficient), it doesn't matter if the user queries for
+**            'first + place' or '1st + place', as there are entries in the
+**            FTS index corresponding to both forms of the first token.
+**   </ol>
+**
+**   Whether it is parsing document or query text, any call to xToken that
+**   specifies a <i>tflags</i> argument with the FTS5_TOKEN_COLOCATED bit
+**   is considered to supply a synonym for the previous token. For example,
+**   when parsing the document "I won first place", a tokenizer that supports
+**   synonyms would call xToken() 5 times, as follows:
+**
+**   <codeblock>
+**       xToken(pCtx, 0, "i",                      1,  0,  1);
+**       xToken(pCtx, 0, "won",                    3,  2,  5);
+**       xToken(pCtx, 0, "first",                  5,  6, 11);
+**       xToken(pCtx, FTS5_TOKEN_COLOCATED, "1st", 3,  6, 11);
+**       xToken(pCtx, 0, "place",                  5, 12, 17);
+**</codeblock>
+**
+**   It is an error to specify the FTS5_TOKEN_COLOCATED flag the first time
+**   xToken() is called. Multiple synonyms may be specified for a single token
+**   by making multiple calls to xToken(FTS5_TOKEN_COLOCATED) in sequence.
+**   There is no limit to the number of synonyms that may be provided for a
+**   single token.
+**
+**   In many cases, method (1) above is the best approach. It does not add
+**   extra data to the FTS index or require FTS5 to query for multiple terms,
+**   so it is efficient in terms of disk space and query speed. However, it
+**   does not support prefix queries very well. If, as suggested above, the
+**   token "first" is substituted for "1st" by the tokenizer, then the query:
+**
+**   <codeblock>
+**     ... MATCH '1s*'</codeblock>
+**
+**   will not match documents that contain the token "1st" (as the tokenizer
+**   will probably not map "1s" to any prefix of "first").
+**
+**   For full prefix support, method (3) may be preferred. In this case,
+**   because the index contains entries for both "first" and "1st", prefix
+**   queries such as 'fi*' or '1s*' will match correctly. However, because
+**   extra entries are added to the FTS index, this method uses more space
+**   within the database.
+**
+**   Method (2) offers a midpoint between (1) and (3). Using this method,
+**   a query such as '1s*' will match documents that contain the literal
+**   token "1st", but not "first" (assuming the tokenizer is not able to
+**   provide synonyms for prefixes). However, a non-prefix query like '1st'
+**   will match against "1st" and "first". This method does not require
+**   extra disk space, as no extra entries are added to the FTS index.
+**   On the other hand, it may require more CPU cycles to run MATCH queries,
+**   as separate queries of the FTS index are required for each synonym.
+**
+**   When using methods (2) or (3), it is important that the tokenizer only
+**   provide synonyms when tokenizing document text (method (2)) or query
+**   text (method (3)), not both. Doing so will not cause any errors, but is
+**   inefficient.
+*/
+struct Fts5Tokenizer;
+
+struct fts5_tokenizer
+{
+    int function(void*, const(char*)* azArg, int nArg, Fts5Tokenizer** ppOut) xCreate;
+    void function(Fts5Tokenizer*) xDelete;
+
+    /* Mask of FTS5_TOKENIZE_* flags */
+
+    /* Copy of 2nd argument to xTokenize() */
+    /* Mask of FTS5_TOKEN_* flags */
+    /* Pointer to buffer containing token */
+    /* Size of token in bytes */
+    /* Byte offset of token within input text */
+    /* Byte offset of end of token within input text */
+    int function(Fts5Tokenizer*, void* pCtx, int flags, const(char)* pText, int nText, int function(void* pCtx, int tflags, const(char)* pToken, int nToken, int iStart, int iEnd) xToken) xTokenize;
+}
+
+/* Flags that may be passed as the third argument to xTokenize() */
+enum FTS5_TOKENIZE_QUERY = 0x0001;
+enum FTS5_TOKENIZE_PREFIX = 0x0002;
+enum FTS5_TOKENIZE_DOCUMENT = 0x0004;
+enum FTS5_TOKENIZE_AUX = 0x0008;
+
+/* Flags that may be passed by the tokenizer implementation back to FTS5
+** as the third argument to the supplied xToken callback. */
+enum FTS5_TOKEN_COLOCATED = 0x0001; /* Same position as prev. token */
+
+/*
+** END OF CUSTOM TOKENIZERS
+*************************************************************************/
+
+/*************************************************************************
+** FTS5 EXTENSION REGISTRATION API
+*/
+struct fts5_api
+{
+    int iVersion; /* Currently always set to 2 */
+
+    /* Create a new tokenizer */
+    int function(fts5_api* pApi, const(char)* zName, void* pContext, fts5_tokenizer* pTokenizer, void function(void*) xDestroy) xCreateTokenizer;
+
+    /* Find an existing tokenizer */
+    int function(fts5_api* pApi, const(char)* zName, void** ppContext, fts5_tokenizer* pTokenizer) xFindTokenizer;
+
+    /* Create a new auxiliary function */
+    int function(fts5_api* pApi, const(char)* zName, void* pContext, fts5_extension_function xFunction, void function(void*) xDestroy) xCreateFunction;
+}
+
+/*
+** END OF REGISTRATION API
+*************************************************************************/
+
+/* end of the 'extern "C"' block */
+
+/* _FTS5_H */
+
+/******** End of fts5.h *********/
diff --git a/src/ext_depends/d2sqlite3/source/d2sqlite3/statement.d b/src/ext_depends/d2sqlite3/source/d2sqlite3/statement.d
new file mode 100644
index 0000000..14fe855
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/d2sqlite3/statement.d
@@ -0,0 +1,438 @@
+/++
+Managing prepared statements.
+
+Authors:
+    Nicolas Sicard (biozic) and other contributors at $(LINK https://github.com/biozic/d2sqlite3)
+
+Copyright:
+    Copyright 2011-18 Nicolas Sicard.
+
+License:
+    $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
++/
+module d2sqlite3.statement;
+
+import d2sqlite3.database;
+import d2sqlite3.results;
+import d2sqlite3.sqlite3;
+import d2sqlite3.internal.memory;
+import d2sqlite3.internal.util;
+
+import std.conv : to;
+import std.exception : enforce;
+import std.string : format, toStringz;
+import std.typecons : Nullable;
+
+/// Set _UnlockNotify version if compiled with SqliteEnableUnlockNotify or SqliteFakeUnlockNotify
+version (SqliteEnableUnlockNotify) version = _UnlockNotify;
+else version (SqliteFakeUnlockNotify) version = _UnlockNotify;
+
+/++
+A prepared statement.
+
+This struct is a reference-counted wrapper around a `sqlite3_stmt*` pointer.
+Instances of this struct are typically returned by `Database.prepare()`.
++/
+struct Statement
+{
+    import std.meta : allSatisfy;
+    import std.traits : isIntegral, isSomeChar, isBoolean, isFloatingPoint,
+        isSomeString, isStaticArray, isDynamicArray, isIterable;
+    import std.typecons : RefCounted, RefCountedAutoInitialize;
+
+private:
+
+    /// Returns $(D true) if the value can be directly bound to the statement
+    enum bool isBindable(T) =
+        is(T == typeof(null)) || is(T == void*) || isIntegral!T || isSomeChar!T
+        || isBoolean!T || isFloatingPoint!T || isSomeString!T || isStaticArray!T
+        || isDynamicArray!T || is(T == Nullable!U, U...);
+
+    struct Payload
+    {
+        Database db;
+        sqlite3_stmt* handle; // null if error or empty statement
+        int paramCount;
+        debug string sql;
+
+        ~this() nothrow
+        {
+            debug ensureNotInGC!Statement(sql);
+            sqlite3_finalize(handle);
+        }
+    }
+
+    RefCounted!(Payload, RefCountedAutoInitialize.no) p;
+
+    void checkResult(int result)
+    {
+        enforce(result == SQLITE_OK, new SqliteException(errmsg(p.handle), result));
+    }
+
+    version (_UnlockNotify)
+    {
+        auto sqlite3_blocking_prepare_v2(Database db, const char *zSql, int nByte,
+                                         sqlite3_stmt **ppStmt, const char **pzTail)
+        {
+            int rc;
+            while(SQLITE_LOCKED == (rc = sqlite3_prepare_v2(db.handle(), zSql, nByte, ppStmt, pzTail)))
+            {
+                rc = db.waitForUnlockNotify();
+                if(rc != SQLITE_OK) break;
+            }
+            return rc;
+        }
+    }
+
+package(d2sqlite3):
+    this(Database db, string sql)
+    {
+        sqlite3_stmt* handle;
+        version (_UnlockNotify)
+        {
+            auto result = sqlite3_blocking_prepare_v2(db, sql.toStringz, sql.length.to!int,
+                &handle, null);
+        }
+        else
+        {
+            auto result = sqlite3_prepare_v2(db.handle(), sql.toStringz, sql.length.to!int,
+                &handle, null);
+        }
+        enforce(result == SQLITE_OK, new SqliteException(errmsg(db.handle()), result, sql));
+        p = Payload(db, handle);
+        p.paramCount = sqlite3_bind_parameter_count(p.handle);
+        debug p.sql = sql;
+    }
+
+    version (_UnlockNotify)
+    {
+        /// Setup and waits for unlock notify using the provided `IUnlockNotifyHandler`
+        auto waitForUnlockNotify()
+        {
+            return p.db.waitForUnlockNotify();
+        }
+    }
+
+public:
+    /++
+    Gets the SQLite internal _handle of the statement.
+    +/
+    inout(sqlite3_stmt)* handle() inout @safe pure nothrow @nogc
+    {
+        return p.handle;
+    }
+
+    /++
+    Explicitly finalizes the prepared statement.
+
+    After a call to `finalize()`, the `Statement` object is destroyed and cannot be used.
+    +/
+    void finalize()
+    {
+        destroy(p);
+    }
+
+    /++
+    Tells whether the statement is empty (no SQL statement).
+    +/
+    bool empty() const @safe pure nothrow @nogc
+    {
+        return p.handle is null;
+    }
+    ///
+    unittest
+    {
+        auto db = Database(":memory:");
+        auto statement = db.prepare(" ; ");
+        assert(statement.empty);
+    }
+
+    /++
+    Binds values to parameters of this statement, using parameter index.
+
+    Params:
+        index = The index of the parameter (starting from 1).
+
+        value = The bound _value. The type of value must be compatible with the SQLite
+        types: it must be a boolean or numeric type, a string, an array, null,
+        or a Nullable!T where T is any of the previous types.
+    +/
+    void bind(T)(int index, T value)
+    in
+    {
+        assert(index > 0 && index <= p.paramCount, "parameter index out of range");
+    }
+    body
+    {
+        assert(p.handle);
+
+        static if (is(T == typeof(null)) || is(T == void*))
+            checkResult(sqlite3_bind_null(p.handle, index));
+
+        // Handle nullable before user-provided hook as we don't want to write
+        // `Nullable.null` when the value `isNull`.
+        else static if (is(T == Nullable!U, U...))
+        {
+            if (value.isNull)
+                checkResult(sqlite3_bind_null(p.handle, index));
+            else
+                this.bind(index, value.get);
+        }
+
+        // Check for user-defined hook
+        else static if (is(typeof(value.toString((in char[]) {}))))
+        {
+            string str = format("%s", value);
+            auto ptr = anchorMem(cast(void*) str.ptr);
+            checkResult(sqlite3_bind_text64(p.handle, index, cast(const(char)*) ptr,
+                                            str.length, &releaseMem, SQLITE_UTF8));
+        }
+        else static if (is(typeof(value.toString()) : string))
+        {
+            string str = value.toString();
+            auto ptr = anchorMem(cast(void*) str.ptr);
+            checkResult(sqlite3_bind_text64(p.handle, index, cast(const(char)*) ptr,
+                                            str.length, &releaseMem, SQLITE_UTF8));
+        }
+
+        else static if (isIntegral!T || isSomeChar!T || isBoolean!T)
+            checkResult(sqlite3_bind_int64(p.handle, index, value.to!long));
+        else static if (isFloatingPoint!T)
+            checkResult(sqlite3_bind_double(p.handle, index, value.to!double));
+        else static if (isSomeString!T)
+        {
+            string str = value.to!string;
+            auto ptr = anchorMem(cast(void*) str.ptr);
+            checkResult(sqlite3_bind_text64(p.handle, index, cast(const(char)*) ptr,
+                                            str.length, &releaseMem, SQLITE_UTF8));
+        }
+        else static if (isStaticArray!T)
+            checkResult(sqlite3_bind_blob64(p.handle, index, cast(void*) value.ptr,
+                                            value.sizeof, SQLITE_TRANSIENT));
+        else static if (isDynamicArray!T)
+        {
+            const void[] arr = value;
+            checkResult(sqlite3_bind_blob64(p.handle, index, anchorMem(arr.ptr),
+                                            arr.length, &releaseMem));
+        }
+        else
+            static assert(0, "Don't know how to bind an instance of type: " ~ T.stringof);
+    }
+
+    /++
+    Binds values to parameters of this statement, using parameter names.
+
+    Params:
+        name = The name of the parameter, including the ':', '@' or '$' that introduced it.
+
+        value = The bound _value. The type of value must be compatible with the SQLite
+        types: it must be a boolean or numeric type, a string, an array, null,
+        or a Nullable!T where T is any of the previous types.
+
+    Warning:
+        While convenient, this overload of `bind` is less performant, because it has to
+        retrieve the column index with a call to the SQLite function
+        `sqlite3_bind_parameter_index`.
+    +/
+    void bind(T)(string name, T value)
+    in
+    {
+        assert(name.length);
+    }
+    body
+    {
+        assert(p.handle);
+        auto index = sqlite3_bind_parameter_index(p.handle, name.toStringz);
+        assert(index > 0, "no parameter named '%s'".format(name));
+        bind(index, value);
+    }
+
+    /++
+    Binds all the arguments at once in order.
+    +/
+    void bindAll(Args...)(Args args)
+    in
+    {
+        assert(Args.length == this.parameterCount, "parameter count mismatch");
+    }
+    body
+    {
+        foreach (index, _; Args)
+            bind(index + 1, args[index]);
+    }
+
+    /++
+    Clears the bindings.
+
+    This does not reset the statement. Use `Statement.reset()` for this.
+    +/
+    void clearBindings()
+    {
+        assert(p.handle);
+        checkResult(sqlite3_clear_bindings(p.handle));
+    }
+
+    /++
+    Executes the statement and return a (possibly empty) range of results.
+    +/
+    ResultRange execute()
+    {
+        return ResultRange(this);
+    }
+
+    /++
+    Resets a this statement before a new execution.
+
+    Calling this method invalidates any `ResultRange` struct returned by a previous call
+    to `Database.execute()` or `Statement.execute()`.
+
+    This does not clear the bindings. Use `Statement.clearBindings()` for this.
+    +/
+    void reset()
+    {
+        assert(p.handle);
+        checkResult(sqlite3_reset(p.handle));
+    }
+
+    /++
+    Binds arguments, executes and resets the statement, in one call.
+
+    This convenience function is equivalent to:
+    ---
+    bindAll(args);
+    execute();
+    reset();
+    ---
+    +/
+    void inject(Args...)(Args args)
+        if (allSatisfy!(isBindable, Args))
+    {
+        bindAll(args);
+        execute();
+        reset();
+    }
+
+    /++
+    Binds the fields of a struct in order, executes and resets the statement, in one call.
+    +/
+    void inject(T)(auto ref const T obj)
+        if (is(T == struct))
+    {
+        import std.meta : Filter;
+        import std.traits : FieldNameTuple;
+
+        enum accesible(string F) = __traits(compiles, __traits(getMember, obj, F));
+        enum bindable(string F) = isBindable!(typeof(__traits(getMember, obj, F)));
+
+        alias FieldNames = Filter!(bindable, Filter!(accesible, FieldNameTuple!T));
+        assert(FieldNames.length == this.parameterCount, "parameter count mismatch");
+        foreach (i, field; FieldNames)
+            bind(i + 1, __traits(getMember, obj, field));
+        execute();
+        reset();
+    }
+
+    /++
+    Binds iterable values in order, executes and resets the statement, in one call.
+    +/
+    void inject(T)(auto ref T obj)
+        if (!isBindable!T && isIterable!T)
+    in
+    {
+        static if (__traits(compiles, obj.length))
+            assert(obj.length == this.parameterCount, "parameter count mismatch");
+    }
+    body
+    {
+        static if (__traits(compiles, { foreach (string k, ref v; obj) {} }))
+        {
+            foreach (string k, ref v; obj) bind(k, v);
+        }
+        else
+        {
+            int i = 1;
+            foreach (ref v; obj) bind(i++, v);
+        }
+        execute();
+        reset();
+    }
+
+    /// Gets the count of bind parameters.
+    int parameterCount() nothrow
+    {
+        assert(p.handle);
+        return p.paramCount;
+    }
+
+    /++
+    Gets the name of the bind parameter at the given index.
+
+    Params:
+        index = The index of the parameter (the first parameter has the index 1).
+
+    Returns: The name of the parameter or null is not found or out of range.
+    +/
+    string parameterName(int index)
+    in
+    {
+        assert(index > 0 && index <= p.paramCount, "parameter index out of range");
+    }
+    body
+    {
+        assert(p.handle);
+        return sqlite3_bind_parameter_name(p.handle, index).to!string;
+    }
+
+    /++
+    Gets the index of a bind parameter.
+
+    Returns: The index of the parameter (the first parameter has the index 1)
+    or 0 is not found or out of range.
+    +/
+    int parameterIndex(string name)
+    in
+    {
+        assert(name.length);
+    }
+    body
+    {
+        assert(p.handle);
+        return sqlite3_bind_parameter_index(p.handle, name.toStringz);
+    }
+}
+
+/++
+Turns $(D_PARAM value) into a _literal that can be used in an SQLite expression.
++/
+string literal(T)(T value)
+{
+    import std.string : replace;
+    import std.traits : isBoolean, isNumeric, isSomeString, isArray;
+
+    static if (is(T == typeof(null)))
+        return "NULL";
+    else static if (isBoolean!T)
+        return value ? "1" : "0";
+    else static if (isNumeric!T)
+        return value.to!string();
+    else static if (isSomeString!T)
+        return format("'%s'", value.replace("'", "''"));
+    else static if (isArray!T)
+        return "'X%(%X%)'".format(cast(Blob) value);
+    else
+        static assert(false, "cannot make a literal of a value of type " ~ T.stringof);
+}
+///
+unittest
+{
+    assert(null.literal == "NULL");
+    assert(false.literal == "0");
+    assert(true.literal == "1");
+    assert(4.literal == "4");
+    assert(4.1.literal == "4.1");
+    assert("foo".literal == "'foo'");
+    assert("a'b'".literal == "'a''b'''");
+    import std.conv : hexString;
+    auto a = cast(Blob) hexString!"DEADBEEF";
+    assert(a.literal == "'XDEADBEEF'");
+}
diff --git a/src/ext_depends/d2sqlite3/source/tests.d b/src/ext_depends/d2sqlite3/source/tests.d
new file mode 100644
index 0000000..ff20af1
--- /dev/null
+++ b/src/ext_depends/d2sqlite3/source/tests.d
@@ -0,0 +1,931 @@
+module tests.d;
+
+version (unittest):
+
+import d2sqlite3;
+import std.algorithm;
+import std.exception : assertThrown, assertNotThrown;
+import std.string : format;
+import std.typecons : Nullable;
+import std.conv : hexString;
+
+unittest // Test version of SQLite library
+{
+    import std.string : startsWith;
+    assert(versionString.startsWith("3."));
+    assert(versionNumber >= 3_008_007);
+}
+
+unittest // COV
+{
+    auto ts = threadSafe;
+}
+
+unittest // Configuration logging and db.close()
+{
+    static extern (C) void loggerCallback(void* arg, int code, const(char)* msg) nothrow
+    {
+        ++*(cast(int*) arg);
+    }
+
+    int marker = 42;
+
+    shutdown();
+    config(SQLITE_CONFIG_MULTITHREAD);
+    config(SQLITE_CONFIG_LOG, &loggerCallback, &marker);
+    initialize();
+
+    {
+        auto db = Database(":memory:");
+        try
+        {
+            db.run("DROP TABLE wtf");
+        }
+        catch (Exception e)
+        {
+        }
+        db.close();
+    }
+    assert(marker == 43);
+
+    shutdown();
+    config(SQLITE_CONFIG_LOG, null, null);
+    initialize();
+
+    {
+        auto db = Database(":memory:");
+        try
+        {
+            db.run("DROP TABLE wtf");
+        }
+        catch (Exception e)
+        {
+        }
+    }
+    assert(marker == 43);
+}
+
+unittest // Database.tableColumnMetadata()
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (id INTEGER PRIMARY KEY AUTOINCREMENT,
+            val FLOAT NOT NULL)");
+    assert(db.tableColumnMetadata("test", "id") ==
+            TableColumnMetadata("INTEGER", "BINARY", false, true, true));
+    assert(db.tableColumnMetadata("test", "val") ==
+            TableColumnMetadata("FLOAT", "BINARY", true, false, false));
+}
+
+unittest // Database.run()
+{
+    auto db = Database(":memory:");
+    int i;
+    db.run(`SELECT 1; SELECT 2;`, (ResultRange r) { i = r.oneValue!int; return false; });
+    assert(i == 1);
+}
+
+unittest // Database.errorCode()
+{
+    auto db = Database(":memory:");
+    db.run(`SELECT 1;`);
+    assert(db.errorCode == SQLITE_OK);
+    try
+        db.run(`DROP TABLE non_existent`);
+    catch (SqliteException e)
+        assert(db.errorCode == SQLITE_ERROR);
+}
+
+unittest // Database.config
+{
+    auto db = Database(":memory:");
+    db.run(`
+        CREATE TABLE test (val INTEGER);
+        CREATE TRIGGER test_trig BEFORE INSERT ON test
+        BEGIN
+            SELECT RAISE(FAIL, 'Test failed');
+        END;
+    `);
+    int res = 42;
+    db.config(SQLITE_DBCONFIG_ENABLE_TRIGGER, 0, &res);
+    assert(res == 0);
+    db.execute("INSERT INTO test (val) VALUES (1)");
+}
+
+unittest // Database.createFunction(ColumnData[]...)
+{
+    string myList(ColumnData[] args...)
+    {
+        import std.array : appender;
+        import std.string : format, join;
+
+        auto app = appender!(string[]);
+        foreach (arg; args)
+        {
+            if (arg.type == SqliteType.TEXT)
+                app.put(`"%s"`.format(arg));
+            else
+                app.put("%s".format(arg));
+        }
+        return app.data.join(", ");
+    }
+    auto db = Database(":memory:");
+    db.createFunction("my_list", &myList);
+    auto list = db.execute("SELECT my_list(42, 3.14, 'text', x'00FF', NULL)").oneValue!string;
+    assert(list == `42, 3.14, "text", [0, 255], null`, list);
+}
+
+unittest // Database.createFunction() exceptions
+{
+    import std.exception : assertThrown;
+
+    int myFun(int a, int b = 1)
+    {
+        return a * b;
+    }
+
+    auto db = Database(":memory:");
+    db.createFunction("myFun", &myFun);
+    assertThrown!SqliteException(db.execute("SELECT myFun()"));
+    assertThrown!SqliteException(db.execute("SELECT myFun(1, 2, 3)"));
+    assert(db.execute("SELECT myFun(5)").oneValue!int == 5);
+    assert(db.execute("SELECT myFun(5, 2)").oneValue!int == 10);
+
+    db.createFunction("myFun", null);
+    assertThrown!SqliteException(db.execute("SELECT myFun(5)"));
+    assertThrown!SqliteException(db.execute("SELECT myFun(5, 2)"));
+}
+
+unittest // Database.setUpdateHook()
+{
+    int i;
+    auto db = Database(":memory:");
+    db.setUpdateHook((int type, string dbName, string tableName, long rowid) {
+        assert(type == SQLITE_INSERT);
+        assert(dbName == "main");
+        assert(tableName == "test");
+        assert(rowid == 1);
+        i = 42;
+    });
+    db.run("CREATE TABLE test (val INTEGER);
+            INSERT INTO test VALUES (100)");
+    assert(i == 42);
+    db.setUpdateHook(null);
+}
+
+unittest // Database commit and rollback hooks
+{
+    int i;
+    auto db = Database(":memory:");
+    db.setCommitHook({ i = 42; return SQLITE_OK; });
+    db.setRollbackHook({ i = 666; });
+    db.begin();
+    db.execute("CREATE TABLE test (val INTEGER)");
+    db.rollback();
+    assert(i == 666);
+    db.begin();
+    db.execute("CREATE TABLE test (val INTEGER)");
+    db.commit();
+    assert(i == 42);
+    db.setCommitHook(null);
+    db.setRollbackHook(null);
+}
+
+unittest // Miscellaneous functions
+{
+    auto db = Database(":memory:");
+    assert(db.attachedFilePath("main") is null);
+    assert(!db.isReadOnly);
+    db.close();
+}
+
+unittest // Execute an SQL statement
+{
+    auto db = Database(":memory:");
+    db.run("");
+    db.run("-- This is a comment!");
+    db.run(";");
+    db.run("ANALYZE; VACUUM;");
+}
+
+unittest // Unexpected multiple statements
+{
+    auto db = Database(":memory:");
+    db.execute("BEGIN; CREATE TABLE test (val INTEGER); ROLLBACK;");
+    assertThrown(db.execute("DROP TABLE test"));
+
+    db.execute("CREATE TABLE test (val INTEGER); DROP TABLE test;");
+    assertNotThrown(db.execute("DROP TABLE test"));
+
+    db.execute("SELECT 1; CREATE TABLE test (val INTEGER); DROP TABLE test;");
+    assertThrown(db.execute("DROP TABLE test"));
+}
+
+unittest // Multiple statements with callback
+{
+    import std.array : appender;
+    auto db = Database(":memory:");
+    auto test = appender!string;
+    db.run("SELECT 1, 2, 3; SELECT 'A', 'B', 'C';", (ResultRange r) {
+        foreach (col; r.front)
+            test.put(col.as!string);
+        return true;
+    });
+    assert(test.data == "123ABC");
+}
+
+unittest // Different arguments and result types with createFunction
+{
+    auto db = Database(":memory:");
+
+    T display(T)(T value)
+    {
+        return value;
+    }
+
+    db.createFunction("display_integer", &display!int);
+    db.createFunction("display_float", &display!double);
+    db.createFunction("display_text", &display!string);
+    db.createFunction("display_blob", &display!Blob);
+
+    assert(db.execute("SELECT display_integer(42)").oneValue!int == 42);
+    assert(db.execute("SELECT display_float(3.14)").oneValue!double == 3.14);
+    assert(db.execute("SELECT display_text('ABC')").oneValue!string == "ABC");
+    assert(db.execute("SELECT display_blob(x'ABCD')").oneValue!Blob == cast(Blob) hexString!"ABCD");
+
+    assert(db.execute("SELECT display_integer(NULL)").oneValue!int == 0);
+    assert(db.execute("SELECT display_float(NULL)").oneValue!double == 0.0);
+    assert(db.execute("SELECT display_text(NULL)").oneValue!string is null);
+    assert(db.execute("SELECT display_blob(NULL)").oneValue!(Blob) is null);
+}
+
+unittest // Different Nullable argument types with createFunction
+{
+    auto db = Database(":memory:");
+
+    auto display(T : Nullable!U, U...)(T value)
+    {
+        if (value.isNull)
+            return T.init;
+        return value;
+    }
+
+    db.createFunction("display_integer", &display!(Nullable!int));
+    db.createFunction("display_float", &display!(Nullable!double));
+    db.createFunction("display_text", &display!(Nullable!string));
+    db.createFunction("display_blob", &display!(Nullable!Blob));
+
+    assert(db.execute("SELECT display_integer(42)").oneValue!(Nullable!int) == 42);
+    assert(db.execute("SELECT display_float(3.14)").oneValue!(Nullable!double) == 3.14);
+    assert(db.execute("SELECT display_text('ABC')").oneValue!(Nullable!string) == "ABC");
+    assert(db.execute("SELECT display_blob(x'ABCD')").oneValue!(Nullable!Blob) == cast(Blob) hexString!"ABCD");
+
+    assert(db.execute("SELECT display_integer(NULL)").oneValue!(Nullable!int).isNull);
+    assert(db.execute("SELECT display_float(NULL)").oneValue!(Nullable!double).isNull);
+    assert(db.execute("SELECT display_text(NULL)").oneValue!(Nullable!string).isNull);
+    assert(db.execute("SELECT display_blob(NULL)").oneValue!(Nullable!Blob).isNull);
+}
+
+unittest // Callable struct with createFunction
+{
+    import std.functional : toDelegate;
+
+    struct Fun
+    {
+        int factor;
+
+        this(int factor)
+        {
+            this.factor = factor;
+        }
+
+        int opCall(int value)
+        {
+            return value * factor;
+        }
+    }
+
+    auto f = Fun(2);
+    auto db = Database(":memory:");
+    db.createFunction("my_fun", toDelegate(f));
+    assert(db.execute("SELECT my_fun(4)").oneValue!int == 8);
+}
+
+unittest // Callbacks
+{
+    bool wasTraced = false;
+    bool wasProfiled = false;
+    bool hasProgressed = false;
+
+    auto db = Database(":memory:");
+    db.setTraceCallback((string s) { wasTraced = true; });
+    db.execute("SELECT * FROM sqlite_master;");
+    assert(wasTraced);
+    db.setProfileCallback((string s, ulong t) { wasProfiled = true; });
+    db.execute("SELECT * FROM sqlite_master;");
+    assert(wasProfiled);
+
+    db.setProgressHandler(1, { hasProgressed = true; return 0; });
+    db.execute("SELECT * FROM sqlite_master;");
+    assert(hasProgressed);
+}
+
+unittest // Statement.oneValue()
+{
+    Statement statement;
+    {
+        auto db = Database(":memory:");
+        statement = db.prepare(" SELECT 42 ");
+    }
+    assert(statement.execute.oneValue!int == 42);
+}
+
+unittest // Statement.finalize()
+{
+    auto db = Database(":memory:");
+    auto statement = db.prepare(" SELECT 42 ");
+    statement.finalize();
+}
+
+unittest // Simple parameters binding
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (val INTEGER)");
+
+    auto statement = db.prepare("INSERT INTO test (val) VALUES (?)");
+    statement.bind(1, 36);
+    statement.clearBindings();
+    statement.bind(1, 42);
+    statement.execute();
+    statement.reset();
+    statement.bind(1, 42);
+    statement.execute();
+
+    assert(db.lastInsertRowid == 2);
+    assert(db.changes == 1);
+    assert(db.totalChanges == 2);
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+        assert(row.peek!int(0) == 42);
+}
+
+unittest // Multiple parameters binding
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (i INTEGER, f FLOAT, t TEXT)");
+    auto statement = db.prepare("INSERT INTO test (i, f, t) VALUES (:i, @f, $t)");
+
+    assert(statement.parameterCount == 3);
+    assert(statement.parameterName(2) == "@f");
+    assert(statement.parameterIndex("$t") == 3);
+    assert(statement.parameterIndex(":foo") == 0);
+
+    statement.bind("$t", "TEXT");
+    statement.bind(":i", 42);
+    statement.bind("@f", 3.14);
+    statement.execute();
+    statement.reset();
+    statement.bind(1, 42);
+    statement.bind(2, 3.14);
+    statement.bind(3, "TEXT");
+    statement.execute();
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+    {
+        assert(row.length == 3);
+        assert(row.peek!int("i") == 42);
+        assert(row.peek!double("f") == 3.14);
+        assert(row.peek!string("t") == "TEXT");
+    }
+}
+
+// Binding/peeking structs with `toString` and `fromString`
+unittest
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (val TEXT)");
+
+    static struct ToStringSink {
+        string value;
+        void toString(scope void delegate(in char[]) sink) const
+        {
+            sink(this.value);
+        }
+    }
+
+    static struct ToStringMethod {
+        string value;
+        string toString() const
+        {
+            return this.value;
+        }
+    }
+
+    auto statement = db.prepare("INSERT INTO test (val) VALUES (?)");
+    statement.bind(1, ToStringMethod("oldmethod"));
+    statement.clearBindings();
+    statement.bind(1, ToStringMethod("method"));
+    statement.execute();
+    statement.reset();
+    statement.bind(1, ToStringSink("sink"));
+    statement.execute();
+
+    assert(db.lastInsertRowid == 2);
+    assert(db.changes == 1);
+    assert(db.totalChanges == 2);
+
+    auto results = db.execute("SELECT * FROM test");
+    results.equal!((a, b) => a.peek!string(0) == b)(["method", "sink"]);
+}
+
+unittest // Multiple parameters binding: tuples
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (i INTEGER, f FLOAT, t TEXT)");
+    auto statement = db.prepare("INSERT INTO test (i, f, t) VALUES (?, ?, ?)");
+    statement.bindAll(42, 3.14, "TEXT");
+    statement.execute();
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+    {
+        assert(row.length == 3);
+        assert(row.peek!int(0) == 42);
+        assert(row.peek!double(1) == 3.14);
+        assert(row.peek!string(2) == "TEXT");
+    }
+}
+
+unittest // Binding/peeking integral values
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (val INTEGER)");
+
+    auto statement = db.prepare("INSERT INTO test (val) VALUES (?)");
+    statement.inject(cast(byte) 42);
+    statement.inject(42U);
+    statement.inject(42UL);
+    statement.inject('\x2A');
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+        assert(row.peek!long(0) == 42);
+}
+
+void foobar() // Binding/peeking floating point values
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (val FLOAT)");
+
+    auto statement = db.prepare("INSERT INTO test (val) VALUES (?)");
+    statement.inject(42.0F);
+    statement.inject(42.0);
+    statement.inject(42.0L);
+    statement.inject("42");
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+        assert(row.peek!double(0) == 42.0);
+}
+
+unittest // Binding/peeking text values
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (val TEXT);
+            INSERT INTO test (val) VALUES ('I am a text.')");
+
+    auto results = db.execute("SELECT * FROM test");
+    assert(results.front.peek!(string, PeekMode.slice)(0) == "I am a text.");
+    assert(results.front.peek!(string, PeekMode.copy)(0) == "I am a text.");
+
+    import std.exception : assertThrown;
+    import std.variant : VariantException;
+    assertThrown!VariantException(results.front[0].as!Blob);
+}
+
+unittest // Binding/peeking blob values
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (val BLOB)");
+
+    auto statement = db.prepare("INSERT INTO test (val) VALUES (?)");
+    auto array = cast(Blob) [1, 2, 3];
+    statement.inject(array);
+    ubyte[3] sarray = [1, 2, 3];
+    statement.inject(sarray);
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+    {
+        assert(row.peek!(Blob, PeekMode.slice)(0) ==  [1, 2, 3]);
+        assert(row[0].as!Blob == [1, 2, 3]);
+    }
+}
+
+unittest // Struct injecting
+{
+    static struct Test
+    {
+        int i;
+        double f;
+        string t;
+    }
+
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (i INTEGER, f FLOAT, t TEXT)");
+    auto statement = db.prepare("INSERT INTO test (i, f, t) VALUES (?, ?, ?)");
+    auto test = Test(42, 3.14, "TEXT");
+    statement.inject(test);
+    statement.inject(Test(42, 3.14, "TEXT"));
+    auto itest = cast(immutable) Test(42, 3.14, "TEXT");
+    statement.inject(itest);
+
+    auto results = db.execute("SELECT * FROM test");
+    assert(!results.empty);
+    foreach (row; results)
+    {
+        assert(row.length == 3);
+        assert(row.peek!int(0) == 42);
+        assert(row.peek!double(1) == 3.14);
+        assert(row.peek!string(2) == "TEXT");
+    }
+}
+
+unittest // Iterable struct injecting
+{
+    import std.range : iota;
+
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (a INTEGER, b INTEGER, c INTEGER)");
+    auto statement = db.prepare("INSERT INTO test (a, b, c) VALUES (?, ?, ?)");
+    statement.inject(iota(0, 3));
+
+    auto results = db.execute("SELECT * FROM test");
+    assert(!results.empty);
+    foreach (row; results)
+    {
+        assert(row.length == 3);
+        assert(row.peek!int(0) == 0);
+        assert(row.peek!int(1) == 1);
+        assert(row.peek!int(2) == 2);
+    }
+}
+
+unittest // Injecting nullable
+{
+    import std.array : array;
+
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (i INTEGER, s TEXT)");
+    auto statement = db.prepare("INSERT INTO test (i, s) VALUES (?, ?)");
+    statement.inject(Nullable!int(1), "one");
+    statement = db.prepare("INSERT INTO test (i) VALUES (?)");
+    statement.inject(Nullable!int.init);
+
+    auto results = db.execute("SELECT i FROM test ORDER BY rowid");
+    assert(results.equal!((a, b) => a.peek!(Nullable!int)(0) == b)(
+               [ Nullable!int(1), Nullable!int.init ] ));
+}
+
+unittest // Injecting tuple
+{
+    import std.typecons : tuple;
+
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (i INTEGER, f FLOAT, t TEXT)");
+    auto statement = db.prepare("INSERT INTO test (i, f, t) VALUES (?, ?, ?)");
+    statement.inject(tuple(42, 3.14, "TEXT"));
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+    {
+        assert(row.length == 3);
+        assert(row.peek!int(0) == 42);
+        assert(row.peek!double(1) == 3.14);
+        assert(row.peek!string(2) == "TEXT");
+    }
+}
+
+unittest // Injecting dict
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (a TEXT, b TEXT, c TEXT)");
+    auto statement = db.prepare("INSERT INTO test (c, b, a) VALUES (:c, :b, :a)");
+    statement.inject([":a":"a", ":b":"b", ":c":"c"]);
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+    {
+        assert(row.length == 3);
+        assert(row.peek!string(0) == "a");
+        assert(row.peek!string(1) == "b");
+        assert(row.peek!string(2) == "c");
+    }
+}
+
+unittest // Binding Nullable
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (a, b, c, d, e);");
+
+    auto statement = db.prepare("INSERT INTO test (a,b,c,d,e) VALUES (?,?,?,?,?)");
+    statement.bind(1, Nullable!int(123));
+    statement.bind(2, Nullable!int());
+    statement.bind(3, Nullable!(uint, 0)(42));
+    statement.bind(4, Nullable!(uint, 0)());
+    statement.bind(5, Nullable!bool(false));
+    statement.execute();
+
+    auto results = db.execute("SELECT * FROM test");
+    foreach (row; results)
+    {
+        assert(row.length == 5);
+        assert(row.peek!int(0) == 123);
+        assert(row.columnType(1) == SqliteType.NULL);
+        assert(row.peek!int(2) == 42);
+        assert(row.columnType(3) == SqliteType.NULL);
+        assert(!row.peek!bool(4));
+    }
+}
+
+unittest // Peeking Nullable
+{
+    auto db = Database(":memory:");
+    auto results = db.execute("SELECT 1, NULL, 8.5, NULL");
+    foreach (row; results)
+    {
+        assert(row.length == 4);
+        assert(row.peek!(Nullable!double)(2).get == 8.5);
+        assert(row.peek!(Nullable!double)(3).isNull);
+        assert(row.peek!(Nullable!(int, 0))(0).get == 1);
+        assert(row.peek!(Nullable!(int, 0))(1).isNull);
+    }
+}
+
+unittest // GC anchoring test
+{
+    import core.memory : GC;
+
+    auto db = Database(":memory:");
+    auto stmt = db.prepare("SELECT ?");
+
+    auto str = ("I am test string").dup;
+    stmt.bind(1, str);
+    str = null;
+
+    foreach (_; 0..3)
+    {
+        GC.collect();
+        GC.minimize();
+    }
+
+    ResultRange results = stmt.execute();
+    foreach(row; results)
+    {
+        assert(row.length == 1);
+        assert(row.peek!string(0) == "I am test string");
+    }
+}
+
+version (unittest) // ResultRange is an input range of Row
+{
+    import std.range.primitives : isInputRange, ElementType;
+    static assert(isInputRange!ResultRange);
+    static assert(is(ElementType!ResultRange == Row));
+}
+
+unittest // Statement error
+{
+    auto db = Database(":memory:");
+    db.execute("CREATE TABLE test (val INTEGER NOT NULL)");
+    auto stmt = db.prepare("INSERT INTO test (val) VALUES (?)");
+    stmt.bind(1, null);
+    import std.exception : assertThrown;
+    assertThrown!SqliteException(stmt.execute());
+}
+
+version (unittest) // Row is a random access range of ColumnData
+{
+    import std.range.primitives : isRandomAccessRange, ElementType;
+    static assert(isRandomAccessRange!Row);
+    static assert(is(ElementType!Row == ColumnData));
+}
+
+unittest // Row.init
+{
+    import core.exception : AssertError;
+
+    Row row;
+    assert(row.empty);
+    assertThrown!AssertError(row.front);
+    assertThrown!AssertError(row.back);
+    assertThrown!AssertError(row.popFront);
+    assertThrown!AssertError(row.popBack);
+    assertThrown!AssertError(row[""]);
+    assertThrown!AssertError(row.peek!long(0));
+}
+
+unittest // Peek
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (value);
+            INSERT INTO test VALUES (NULL);
+            INSERT INTO test VALUES (42);
+            INSERT INTO test VALUES (3.14);
+            INSERT INTO test VALUES ('ABC');
+            INSERT INTO test VALUES (x'DEADBEEF');");
+
+    import std.math : isNaN;
+    auto results = db.execute("SELECT * FROM test");
+    auto row = results.front;
+    assert(row.peek!long(0) == 0);
+    assert(row.peek!double(0) == 0);
+    assert(row.peek!string(0) is null);
+    assert(row.peek!Blob(0) is null);
+    results.popFront();
+    row = results.front;
+    assert(row.peek!long(0) == 42);
+    assert(row.peek!double(0) == 42);
+    assert(row.peek!string(0) == "42");
+    assert(row.peek!Blob(0) == cast(Blob) "42");
+    results.popFront();
+    row = results.front;
+    assert(row.peek!long(0) == 3);
+    assert(row.peek!double(0) == 3.14);
+    assert(row.peek!string(0) == "3.14");
+    assert(row.peek!Blob(0) == cast(Blob) "3.14");
+    results.popFront();
+    row = results.front;
+    assert(row.peek!long(0) == 0);
+    assert(row.peek!double(0) == 0.0);
+    assert(row.peek!string(0) == "ABC");
+    assert(row.peek!Blob(0) == cast(Blob) "ABC");
+    results.popFront();
+    row = results.front;
+    assert(row.peek!long(0) == 0);
+    assert(row.peek!double(0) == 0.0);
+    assert(row.peek!string(0) == hexString!"DEADBEEF");
+    assert(row.peek!Blob(0) == cast(Blob) hexString!"DEADBEEF");
+}
+
+unittest // Peeking NULL values
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (val TEXT);
+            INSERT INTO test (val) VALUES (NULL)");
+
+    auto results = db.execute("SELECT * FROM test");
+    assert(results.front.peek!bool(0) == false);
+    assert(results.front.peek!long(0) == 0);
+    assert(results.front.peek!double(0) == 0);
+    assert(results.front.peek!string(0) is null);
+    assert(results.front.peek!Blob(0) is null);
+}
+
+unittest // Row life-time
+{
+    auto db = Database(":memory:");
+    auto row = db.execute("SELECT 1 AS one").front;
+    assert(row[0].as!long == 1);
+    assert(row["one"].as!long == 1);
+}
+
+unittest // PeekMode
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (value);
+            INSERT INTO test VALUES (x'01020304');
+            INSERT INTO test VALUES (x'0A0B0C0D');");
+
+    auto results = db.execute("SELECT * FROM test");
+    auto row = results.front;
+    auto b1 = row.peek!(Blob, PeekMode.copy)(0);
+    auto b2 = row.peek!(Blob, PeekMode.slice)(0);
+    results.popFront();
+    row = results.front;
+    auto b3 = row.peek!(Blob, PeekMode.slice)(0);
+    auto b4 = row.peek!(Nullable!Blob, PeekMode.copy)(0);
+    assert(b1 == cast(Blob) hexString!"01020304");
+    // assert(b2 != cast(Blob) x"01020304"); // PASS if SQLite reuses internal buffer
+    // assert(b2 == cast(Blob) x"0A0B0C0D"); // PASS (idem)
+    assert(b3 == cast(Blob) hexString!"0A0B0C0D");
+    assert(!b4.isNull && b4 == cast(Blob) hexString!"0A0B0C0D");
+}
+
+unittest // Row random-access range interface
+{
+    import std.array : front, popFront;
+
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (a INTEGER, b INTEGER, c INTEGER, d INTEGER);
+        INSERT INTO test VALUES (1, 2, 3, 4);
+        INSERT INTO test VALUES (5, 6, 7, 8);");
+
+    {
+        auto results = db.execute("SELECT * FROM test");
+        auto values = [1, 2, 3, 4, 5, 6, 7, 8];
+        foreach (row; results)
+        {
+            while (!row.empty)
+            {
+                assert(row.front.as!int == values.front);
+                row.popFront();
+                values.popFront();
+            }
+        }
+    }
+
+    {
+        auto results = db.execute("SELECT * FROM test");
+        auto values = [4, 3, 2, 1, 8, 7, 6, 5];
+        foreach (row; results)
+        {
+            while (!row.empty)
+            {
+                assert(row.back.as!int == values.front);
+                row.popBack();
+                values.popFront();
+            }
+        }
+    }
+
+    {
+        auto row = db.execute("SELECT * FROM test").front;
+        row.popFront();
+        auto copy = row.save();
+        row.popFront();
+        assert(row.front.as!int == 3);
+        assert(copy.front.as!int == 2);
+    }
+}
+
+unittest // ColumnData.init
+{
+    import core.exception : AssertError;
+    ColumnData data;
+    assertThrown!AssertError(data.type);
+    assertThrown!AssertError(data.as!string);
+}
+
+unittest // ColumnData-compatible types
+{
+    import std.meta : AliasSeq;
+
+    alias AllCases = AliasSeq!(bool, true, int, int.max, float, float.epsilon,
+        real, 42.0L, string, "おはよう！", const(ubyte)[], [0x00, 0xFF],
+        string, "", Nullable!byte, 42);
+
+    void test(Cases...)()
+    {
+        auto cd = ColumnData(Cases[1]);
+        assert(cd.as!(Cases[0]) == Cases[1]);
+        static if (Cases.length > 2)
+            test!(Cases[2..$])();
+    }
+
+    test!AllCases();
+}
+
+unittest // ColumnData.toString
+{
+    auto db = Database(":memory:");
+    auto rc = db.execute("SELECT 42, 3.14, 'foo_bar', x'00FF', NULL").cached;
+    assert("%(%s%)".format(rc) == "[42, 3.14, foo_bar, [0, 255], null]");
+}
+
+unittest // CachedResults copies
+{
+    auto db = Database(":memory:");
+    db.run("CREATE TABLE test (msg TEXT);
+            INSERT INTO test (msg) VALUES ('ABC')");
+
+    static getdata(Database db)
+    {
+        return db.execute("SELECT * FROM test").cached;
+    }
+
+    auto data = getdata(db);
+    assert(data.length == 1);
+    assert(data[0][0].as!string == "ABC");
+}
+
+unittest // UTF-8
+{
+    auto db = Database(":memory:");
+    bool ran = false;
+    db.run("SELECT '\u2019\u2019';", (ResultRange r) {
+        assert(r.oneValue!string == "\u2019\u2019");
+        ran = true;
+        return true;
+    });
+    assert(ran);
+}
+
+unittest // loadExtension failure test
+{
+    import std.exception : collectExceptionMsg;
+    auto db = Database(":memory:");
+    auto msg = collectExceptionMsg(db.loadExtension("foobar"));
+    assert(msg.canFind("(not authorized)"));
+}