/* Package sqlite3 provides interface to SQLite3 databases. This works as a driver for database/sql. Installation go get github.com/mattn/go-sqlite3 Supported Types Currently, go-sqlite3 supports the following data types. +------------------------------+ |go | sqlite3 | |----------|-------------------| |nil | null | |int | integer | |int64 | integer | |float64 | float | |bool | integer | |[]byte | blob | |string | text | |time.Time | timestamp/datetime| +------------------------------+ SQLite3 Extension You can write your own extension module for sqlite3. For example, below is an extension for a Regexp matcher operation. #include <pcre.h> #include <string.h> #include <stdio.h> #include <sqlite3ext.h> SQLITE_EXTENSION_INIT1 static void regexp_func(sqlite3_context *context, int argc, sqlite3_value **argv) { if (argc >= 2) { const char *target = (const char *)sqlite3_value_text(argv[1]); const char *pattern = (const char *)sqlite3_value_text(argv[0]); const char* errstr = NULL; int erroff = 0; int vec[500]; int n, rc; pcre* re = pcre_compile(pattern, 0, &errstr, &erroff, NULL); rc = pcre_exec(re, NULL, target, strlen(target), 0, 0, vec, 500); if (rc <= 0) { sqlite3_result_error(context, errstr, 0); return; } sqlite3_result_int(context, 1); } } #ifdef _WIN32 __declspec(dllexport) #endif int sqlite3_extension_init(sqlite3 *db, char **errmsg, const sqlite3_api_routines *api) { SQLITE_EXTENSION_INIT2(api); return sqlite3_create_function(db, "regexp", 2, SQLITE_UTF8, (void*)db, regexp_func, NULL, NULL); } It needs to be built as a so/dll shared library. And you need to register the extension module like below. sql.Register("sqlite3_with_extensions", &sqlite3.SQLiteDriver{ Extensions: []string{ "sqlite3_mod_regexp", }, }) Then, you can use this extension. rows, err := db.Query("select text from mytable where name regexp '^golang'") Connection Hook You can hook and inject your code when the connection is established. database/sql doesn't provide a way to get native go-sqlite3 interfaces. So if you want, you need to set ConnectHook and get the SQLiteConn. sql.Register("sqlite3_with_hook_example", &sqlite3.SQLiteDriver{ ConnectHook: func(conn *sqlite3.SQLiteConn) error { sqlite3conn = append(sqlite3conn, conn) return nil }, }) Go SQlite3 Extensions If you want to register Go functions as SQLite extension functions, call RegisterFunction from ConnectHook. regex = func(re, s string) (bool, error) { return regexp.MatchString(re, s) } sql.Register("sqlite3_with_go_func", &sqlite3.SQLiteDriver{ ConnectHook: func(conn *sqlite3.SQLiteConn) error { return conn.RegisterFunc("regexp", regex, true) }, }) See the documentation of RegisterFunc for more details. */ package sqlite3