1007 lines
25 KiB
Go
1007 lines
25 KiB
Go
// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
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//
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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package sqlite3
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/*
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#cgo CFLAGS: -std=gnu99
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#cgo CFLAGS: -DSQLITE_ENABLE_RTREE -DSQLITE_THREADSAFE
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#cgo CFLAGS: -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS4_UNICODE61
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#ifndef USE_LIBSQLITE3
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#include <sqlite3-binding.h>
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#else
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#include <sqlite3.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#ifdef __CYGWIN__
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# include <errno.h>
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#endif
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#ifndef SQLITE_OPEN_READWRITE
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# define SQLITE_OPEN_READWRITE 0
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#endif
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#ifndef SQLITE_OPEN_FULLMUTEX
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# define SQLITE_OPEN_FULLMUTEX 0
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#endif
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#ifndef SQLITE_DETERMINISTIC
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# define SQLITE_DETERMINISTIC 0
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#endif
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static int
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_sqlite3_open_v2(const char *filename, sqlite3 **ppDb, int flags, const char *zVfs) {
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#ifdef SQLITE_OPEN_URI
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return sqlite3_open_v2(filename, ppDb, flags | SQLITE_OPEN_URI, zVfs);
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#else
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return sqlite3_open_v2(filename, ppDb, flags, zVfs);
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#endif
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}
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static int
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_sqlite3_bind_text(sqlite3_stmt *stmt, int n, char *p, int np) {
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return sqlite3_bind_text(stmt, n, p, np, SQLITE_TRANSIENT);
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}
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static int
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_sqlite3_bind_blob(sqlite3_stmt *stmt, int n, void *p, int np) {
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return sqlite3_bind_blob(stmt, n, p, np, SQLITE_TRANSIENT);
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}
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#include <stdio.h>
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#include <stdint.h>
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static int
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_sqlite3_exec(sqlite3* db, const char* pcmd, long long* rowid, long long* changes)
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{
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int rv = sqlite3_exec(db, pcmd, 0, 0, 0);
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*rowid = (long long) sqlite3_last_insert_rowid(db);
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*changes = (long long) sqlite3_changes(db);
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return rv;
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}
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static int
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_sqlite3_step(sqlite3_stmt* stmt, long long* rowid, long long* changes)
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{
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int rv = sqlite3_step(stmt);
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sqlite3* db = sqlite3_db_handle(stmt);
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*rowid = (long long) sqlite3_last_insert_rowid(db);
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*changes = (long long) sqlite3_changes(db);
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return rv;
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}
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void _sqlite3_result_text(sqlite3_context* ctx, const char* s) {
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sqlite3_result_text(ctx, s, -1, &free);
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}
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void _sqlite3_result_blob(sqlite3_context* ctx, const void* b, int l) {
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sqlite3_result_blob(ctx, b, l, SQLITE_TRANSIENT);
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}
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int _sqlite3_create_function(
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sqlite3 *db,
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const char *zFunctionName,
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int nArg,
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int eTextRep,
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uintptr_t pApp,
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void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
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void (*xStep)(sqlite3_context*,int,sqlite3_value**),
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void (*xFinal)(sqlite3_context*)
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) {
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return sqlite3_create_function(db, zFunctionName, nArg, eTextRep, (void*) pApp, xFunc, xStep, xFinal);
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}
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void callbackTrampoline(sqlite3_context*, int, sqlite3_value**);
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void stepTrampoline(sqlite3_context*, int, sqlite3_value**);
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void doneTrampoline(sqlite3_context*);
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*/
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import "C"
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import (
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"database/sql"
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"database/sql/driver"
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"errors"
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"fmt"
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"io"
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"net/url"
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"reflect"
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"runtime"
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"strconv"
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"strings"
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"time"
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"unsafe"
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)
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// Timestamp formats understood by both this module and SQLite.
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// The first format in the slice will be used when saving time values
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// into the database. When parsing a string from a timestamp or
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// datetime column, the formats are tried in order.
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var SQLiteTimestampFormats = []string{
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// By default, store timestamps with whatever timezone they come with.
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// When parsed, they will be returned with the same timezone.
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"2006-01-02 15:04:05.999999999-07:00",
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"2006-01-02T15:04:05.999999999-07:00",
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"2006-01-02 15:04:05.999999999",
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"2006-01-02T15:04:05.999999999",
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"2006-01-02 15:04:05",
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"2006-01-02T15:04:05",
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"2006-01-02 15:04",
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"2006-01-02T15:04",
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"2006-01-02",
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}
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func init() {
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sql.Register("sqlite3", &SQLiteDriver{})
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}
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// Version returns SQLite library version information.
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func Version() (libVersion string, libVersionNumber int, sourceId string) {
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libVersion = C.GoString(C.sqlite3_libversion())
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libVersionNumber = int(C.sqlite3_libversion_number())
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sourceId = C.GoString(C.sqlite3_sourceid())
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return libVersion, libVersionNumber, sourceId
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}
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// Driver struct.
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type SQLiteDriver struct {
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Extensions []string
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ConnectHook func(*SQLiteConn) error
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}
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// Conn struct.
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type SQLiteConn struct {
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db *C.sqlite3
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loc *time.Location
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txlock string
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funcs []*functionInfo
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aggregators []*aggInfo
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}
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// Tx struct.
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type SQLiteTx struct {
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c *SQLiteConn
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}
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// Stmt struct.
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type SQLiteStmt struct {
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c *SQLiteConn
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s *C.sqlite3_stmt
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nv int
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nn []string
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t string
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closed bool
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cls bool
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}
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// Result struct.
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type SQLiteResult struct {
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id int64
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changes int64
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}
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// Rows struct.
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type SQLiteRows struct {
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s *SQLiteStmt
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nc int
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cols []string
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decltype []string
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cls bool
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}
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type functionInfo struct {
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f reflect.Value
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argConverters []callbackArgConverter
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variadicConverter callbackArgConverter
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retConverter callbackRetConverter
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}
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func (fi *functionInfo) Call(ctx *C.sqlite3_context, argv []*C.sqlite3_value) {
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args, err := callbackConvertArgs(argv, fi.argConverters, fi.variadicConverter)
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if err != nil {
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callbackError(ctx, err)
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return
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}
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ret := fi.f.Call(args)
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if len(ret) == 2 && ret[1].Interface() != nil {
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callbackError(ctx, ret[1].Interface().(error))
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return
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}
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err = fi.retConverter(ctx, ret[0])
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if err != nil {
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callbackError(ctx, err)
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return
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}
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}
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type aggInfo struct {
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constructor reflect.Value
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// Active aggregator objects for aggregations in flight. The
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// aggregators are indexed by a counter stored in the aggregation
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// user data space provided by sqlite.
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active map[int64]reflect.Value
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next int64
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stepArgConverters []callbackArgConverter
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stepVariadicConverter callbackArgConverter
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doneRetConverter callbackRetConverter
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}
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func (ai *aggInfo) agg(ctx *C.sqlite3_context) (int64, reflect.Value, error) {
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aggIdx := (*int64)(C.sqlite3_aggregate_context(ctx, C.int(8)))
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if *aggIdx == 0 {
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*aggIdx = ai.next
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ret := ai.constructor.Call(nil)
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if len(ret) == 2 && ret[1].Interface() != nil {
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return 0, reflect.Value{}, ret[1].Interface().(error)
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}
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if ret[0].IsNil() {
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return 0, reflect.Value{}, errors.New("aggregator constructor returned nil state")
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}
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ai.next++
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ai.active[*aggIdx] = ret[0]
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}
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return *aggIdx, ai.active[*aggIdx], nil
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}
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func (ai *aggInfo) Step(ctx *C.sqlite3_context, argv []*C.sqlite3_value) {
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_, agg, err := ai.agg(ctx)
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if err != nil {
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callbackError(ctx, err)
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return
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}
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args, err := callbackConvertArgs(argv, ai.stepArgConverters, ai.stepVariadicConverter)
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if err != nil {
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callbackError(ctx, err)
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return
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}
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ret := agg.MethodByName("Step").Call(args)
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if len(ret) == 1 && ret[0].Interface() != nil {
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callbackError(ctx, ret[0].Interface().(error))
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return
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}
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}
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func (ai *aggInfo) Done(ctx *C.sqlite3_context) {
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idx, agg, err := ai.agg(ctx)
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if err != nil {
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callbackError(ctx, err)
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return
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}
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defer func() { delete(ai.active, idx) }()
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ret := agg.MethodByName("Done").Call(nil)
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if len(ret) == 2 && ret[1].Interface() != nil {
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callbackError(ctx, ret[1].Interface().(error))
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return
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}
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err = ai.doneRetConverter(ctx, ret[0])
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if err != nil {
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callbackError(ctx, err)
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return
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}
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}
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// Commit transaction.
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func (tx *SQLiteTx) Commit() error {
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_, err := tx.c.exec("COMMIT")
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return err
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}
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// Rollback transaction.
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func (tx *SQLiteTx) Rollback() error {
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_, err := tx.c.exec("ROLLBACK")
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return err
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}
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// RegisterFunc makes a Go function available as a SQLite function.
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//
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// The Go function can have arguments of the following types: any
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// numeric type except complex, bool, []byte, string and
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// interface{}. interface{} arguments are given the direct translation
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// of the SQLite data type: int64 for INTEGER, float64 for FLOAT,
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// []byte for BLOB, string for TEXT.
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//
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// The function can additionally be variadic, as long as the type of
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// the variadic argument is one of the above.
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//
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// If pure is true. SQLite will assume that the function's return
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// value depends only on its inputs, and make more aggressive
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// optimizations in its queries.
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//
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// See _example/go_custom_funcs for a detailed example.
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func (c *SQLiteConn) RegisterFunc(name string, impl interface{}, pure bool) error {
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var fi functionInfo
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fi.f = reflect.ValueOf(impl)
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t := fi.f.Type()
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if t.Kind() != reflect.Func {
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return errors.New("Non-function passed to RegisterFunc")
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}
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if t.NumOut() != 1 && t.NumOut() != 2 {
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return errors.New("SQLite functions must return 1 or 2 values")
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}
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if t.NumOut() == 2 && !t.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
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return errors.New("Second return value of SQLite function must be error")
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}
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numArgs := t.NumIn()
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if t.IsVariadic() {
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numArgs--
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}
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for i := 0; i < numArgs; i++ {
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conv, err := callbackArg(t.In(i))
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if err != nil {
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return err
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}
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fi.argConverters = append(fi.argConverters, conv)
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}
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if t.IsVariadic() {
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conv, err := callbackArg(t.In(numArgs).Elem())
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if err != nil {
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return err
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}
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fi.variadicConverter = conv
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// Pass -1 to sqlite so that it allows any number of
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// arguments. The call helper verifies that the minimum number
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// of arguments is present for variadic functions.
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numArgs = -1
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}
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conv, err := callbackRet(t.Out(0))
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if err != nil {
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return err
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}
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fi.retConverter = conv
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// fi must outlast the database connection, or we'll have dangling pointers.
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c.funcs = append(c.funcs, &fi)
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cname := C.CString(name)
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defer C.free(unsafe.Pointer(cname))
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opts := C.SQLITE_UTF8
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if pure {
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opts |= C.SQLITE_DETERMINISTIC
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}
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rv := C._sqlite3_create_function(c.db, cname, C.int(numArgs), C.int(opts), C.uintptr_t(newHandle(c, &fi)), (*[0]byte)(unsafe.Pointer(C.callbackTrampoline)), nil, nil)
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if rv != C.SQLITE_OK {
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return c.lastError()
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}
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return nil
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}
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// RegisterAggregator makes a Go type available as a SQLite aggregation function.
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//
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// Because aggregation is incremental, it's implemented in Go with a
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// type that has 2 methods: func Step(values) accumulates one row of
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// data into the accumulator, and func Done() ret finalizes and
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// returns the aggregate value. "values" and "ret" may be any type
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// supported by RegisterFunc.
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//
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// RegisterAggregator takes as implementation a constructor function
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// that constructs an instance of the aggregator type each time an
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// aggregation begins. The constructor must return a pointer to a
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// type, or an interface that implements Step() and Done().
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//
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// The constructor function and the Step/Done methods may optionally
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// return an error in addition to their other return values.
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//
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// See _example/go_custom_funcs for a detailed example.
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func (c *SQLiteConn) RegisterAggregator(name string, impl interface{}, pure bool) error {
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var ai aggInfo
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ai.constructor = reflect.ValueOf(impl)
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t := ai.constructor.Type()
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if t.Kind() != reflect.Func {
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return errors.New("non-function passed to RegisterAggregator")
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}
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if t.NumOut() != 1 && t.NumOut() != 2 {
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return errors.New("SQLite aggregator constructors must return 1 or 2 values")
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}
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if t.NumOut() == 2 && !t.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
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return errors.New("Second return value of SQLite function must be error")
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}
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if t.NumIn() != 0 {
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return errors.New("SQLite aggregator constructors must not have arguments")
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}
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agg := t.Out(0)
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switch agg.Kind() {
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case reflect.Ptr, reflect.Interface:
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default:
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return errors.New("SQlite aggregator constructor must return a pointer object")
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}
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stepFn, found := agg.MethodByName("Step")
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if !found {
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return errors.New("SQlite aggregator doesn't have a Step() function")
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}
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step := stepFn.Type
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if step.NumOut() != 0 && step.NumOut() != 1 {
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return errors.New("SQlite aggregator Step() function must return 0 or 1 values")
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}
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if step.NumOut() == 1 && !step.Out(0).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
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return errors.New("type of SQlite aggregator Step() return value must be error")
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}
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stepNArgs := step.NumIn()
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start := 0
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if agg.Kind() == reflect.Ptr {
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// Skip over the method receiver
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stepNArgs--
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start++
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}
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if step.IsVariadic() {
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stepNArgs--
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}
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for i := start; i < start+stepNArgs; i++ {
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conv, err := callbackArg(step.In(i))
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if err != nil {
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return err
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}
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ai.stepArgConverters = append(ai.stepArgConverters, conv)
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}
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if step.IsVariadic() {
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conv, err := callbackArg(t.In(start + stepNArgs).Elem())
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if err != nil {
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return err
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}
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ai.stepVariadicConverter = conv
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// Pass -1 to sqlite so that it allows any number of
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// arguments. The call helper verifies that the minimum number
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// of arguments is present for variadic functions.
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stepNArgs = -1
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}
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doneFn, found := agg.MethodByName("Done")
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if !found {
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return errors.New("SQlite aggregator doesn't have a Done() function")
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}
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done := doneFn.Type
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doneNArgs := done.NumIn()
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if agg.Kind() == reflect.Ptr {
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// Skip over the method receiver
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doneNArgs--
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}
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if doneNArgs != 0 {
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return errors.New("SQlite aggregator Done() function must have no arguments")
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}
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if done.NumOut() != 1 && done.NumOut() != 2 {
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return errors.New("SQLite aggregator Done() function must return 1 or 2 values")
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}
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if done.NumOut() == 2 && !done.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
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return errors.New("second return value of SQLite aggregator Done() function must be error")
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}
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conv, err := callbackRet(done.Out(0))
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if err != nil {
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return err
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}
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ai.doneRetConverter = conv
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ai.active = make(map[int64]reflect.Value)
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ai.next = 1
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// ai must outlast the database connection, or we'll have dangling pointers.
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c.aggregators = append(c.aggregators, &ai)
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cname := C.CString(name)
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defer C.free(unsafe.Pointer(cname))
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opts := C.SQLITE_UTF8
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if pure {
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opts |= C.SQLITE_DETERMINISTIC
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}
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rv := C._sqlite3_create_function(c.db, cname, C.int(stepNArgs), C.int(opts), C.uintptr_t(newHandle(c, &ai)), nil, (*[0]byte)(unsafe.Pointer(C.stepTrampoline)), (*[0]byte)(unsafe.Pointer(C.doneTrampoline)))
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if rv != C.SQLITE_OK {
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return c.lastError()
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}
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return nil
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}
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// AutoCommit return which currently auto commit or not.
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func (c *SQLiteConn) AutoCommit() bool {
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return int(C.sqlite3_get_autocommit(c.db)) != 0
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}
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func (c *SQLiteConn) lastError() Error {
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return Error{
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Code: ErrNo(C.sqlite3_errcode(c.db)),
|
|
ExtendedCode: ErrNoExtended(C.sqlite3_extended_errcode(c.db)),
|
|
err: C.GoString(C.sqlite3_errmsg(c.db)),
|
|
}
|
|
}
|
|
|
|
// Implements Execer
|
|
func (c *SQLiteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
|
|
if len(args) == 0 {
|
|
return c.exec(query)
|
|
}
|
|
|
|
for {
|
|
s, err := c.Prepare(query)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var res driver.Result
|
|
if s.(*SQLiteStmt).s != nil {
|
|
na := s.NumInput()
|
|
if len(args) < na {
|
|
return nil, fmt.Errorf("Not enough args to execute query. Expected %d, got %d.", na, len(args))
|
|
}
|
|
res, err = s.Exec(args[:na])
|
|
if err != nil && err != driver.ErrSkip {
|
|
s.Close()
|
|
return nil, err
|
|
}
|
|
args = args[na:]
|
|
}
|
|
tail := s.(*SQLiteStmt).t
|
|
s.Close()
|
|
if tail == "" {
|
|
return res, nil
|
|
}
|
|
query = tail
|
|
}
|
|
}
|
|
|
|
// Implements Queryer
|
|
func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, error) {
|
|
for {
|
|
s, err := c.Prepare(query)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
s.(*SQLiteStmt).cls = true
|
|
na := s.NumInput()
|
|
if len(args) < na {
|
|
return nil, fmt.Errorf("Not enough args to execute query. Expected %d, got %d.", na, len(args))
|
|
}
|
|
rows, err := s.Query(args[:na])
|
|
if err != nil && err != driver.ErrSkip {
|
|
s.Close()
|
|
return nil, err
|
|
}
|
|
args = args[na:]
|
|
tail := s.(*SQLiteStmt).t
|
|
if tail == "" {
|
|
return rows, nil
|
|
}
|
|
rows.Close()
|
|
s.Close()
|
|
query = tail
|
|
}
|
|
}
|
|
|
|
func (c *SQLiteConn) exec(cmd string) (driver.Result, error) {
|
|
pcmd := C.CString(cmd)
|
|
defer C.free(unsafe.Pointer(pcmd))
|
|
|
|
var rowid, changes C.longlong
|
|
rv := C._sqlite3_exec(c.db, pcmd, &rowid, &changes)
|
|
if rv != C.SQLITE_OK {
|
|
return nil, c.lastError()
|
|
}
|
|
return &SQLiteResult{int64(rowid), int64(changes)}, nil
|
|
}
|
|
|
|
// Begin transaction.
|
|
func (c *SQLiteConn) Begin() (driver.Tx, error) {
|
|
if _, err := c.exec(c.txlock); err != nil {
|
|
return nil, err
|
|
}
|
|
return &SQLiteTx{c}, nil
|
|
}
|
|
|
|
func errorString(err Error) string {
|
|
return C.GoString(C.sqlite3_errstr(C.int(err.Code)))
|
|
}
|
|
|
|
// Open database and return a new connection.
|
|
// You can specify a DSN string using a URI as the filename.
|
|
// test.db
|
|
// file:test.db?cache=shared&mode=memory
|
|
// :memory:
|
|
// file::memory:
|
|
// go-sqlite3 adds the following query parameters to those used by SQLite:
|
|
// _loc=XXX
|
|
// Specify location of time format. It's possible to specify "auto".
|
|
// _busy_timeout=XXX
|
|
// Specify value for sqlite3_busy_timeout.
|
|
// _txlock=XXX
|
|
// Specify locking behavior for transactions. XXX can be "immediate",
|
|
// "deferred", "exclusive".
|
|
func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
|
|
if C.sqlite3_threadsafe() == 0 {
|
|
return nil, errors.New("sqlite library was not compiled for thread-safe operation")
|
|
}
|
|
|
|
var loc *time.Location
|
|
txlock := "BEGIN"
|
|
busy_timeout := 5000
|
|
pos := strings.IndexRune(dsn, '?')
|
|
if pos >= 1 {
|
|
params, err := url.ParseQuery(dsn[pos+1:])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// _loc
|
|
if val := params.Get("_loc"); val != "" {
|
|
if val == "auto" {
|
|
loc = time.Local
|
|
} else {
|
|
loc, err = time.LoadLocation(val)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Invalid _loc: %v: %v", val, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// _busy_timeout
|
|
if val := params.Get("_busy_timeout"); val != "" {
|
|
iv, err := strconv.ParseInt(val, 10, 64)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Invalid _busy_timeout: %v: %v", val, err)
|
|
}
|
|
busy_timeout = int(iv)
|
|
}
|
|
|
|
// _txlock
|
|
if val := params.Get("_txlock"); val != "" {
|
|
switch val {
|
|
case "immediate":
|
|
txlock = "BEGIN IMMEDIATE"
|
|
case "exclusive":
|
|
txlock = "BEGIN EXCLUSIVE"
|
|
case "deferred":
|
|
txlock = "BEGIN"
|
|
default:
|
|
return nil, fmt.Errorf("Invalid _txlock: %v", val)
|
|
}
|
|
}
|
|
|
|
if !strings.HasPrefix(dsn, "file:") {
|
|
dsn = dsn[:pos]
|
|
}
|
|
}
|
|
|
|
var db *C.sqlite3
|
|
name := C.CString(dsn)
|
|
defer C.free(unsafe.Pointer(name))
|
|
rv := C._sqlite3_open_v2(name, &db,
|
|
C.SQLITE_OPEN_FULLMUTEX|
|
|
C.SQLITE_OPEN_READWRITE|
|
|
C.SQLITE_OPEN_CREATE,
|
|
nil)
|
|
if rv != 0 {
|
|
return nil, Error{Code: ErrNo(rv)}
|
|
}
|
|
if db == nil {
|
|
return nil, errors.New("sqlite succeeded without returning a database")
|
|
}
|
|
|
|
rv = C.sqlite3_busy_timeout(db, C.int(busy_timeout))
|
|
if rv != C.SQLITE_OK {
|
|
return nil, Error{Code: ErrNo(rv)}
|
|
}
|
|
|
|
conn := &SQLiteConn{db: db, loc: loc, txlock: txlock}
|
|
|
|
if len(d.Extensions) > 0 {
|
|
if err := conn.loadExtensions(d.Extensions); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if d.ConnectHook != nil {
|
|
if err := d.ConnectHook(conn); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
runtime.SetFinalizer(conn, (*SQLiteConn).Close)
|
|
return conn, nil
|
|
}
|
|
|
|
// Close the connection.
|
|
func (c *SQLiteConn) Close() error {
|
|
deleteHandles(c)
|
|
rv := C.sqlite3_close_v2(c.db)
|
|
if rv != C.SQLITE_OK {
|
|
return c.lastError()
|
|
}
|
|
c.db = nil
|
|
runtime.SetFinalizer(c, nil)
|
|
return nil
|
|
}
|
|
|
|
// Prepare the query string. Return a new statement.
|
|
func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
|
|
pquery := C.CString(query)
|
|
defer C.free(unsafe.Pointer(pquery))
|
|
var s *C.sqlite3_stmt
|
|
var tail *C.char
|
|
rv := C.sqlite3_prepare_v2(c.db, pquery, -1, &s, &tail)
|
|
if rv != C.SQLITE_OK {
|
|
return nil, c.lastError()
|
|
}
|
|
var t string
|
|
if tail != nil && *tail != '\000' {
|
|
t = strings.TrimSpace(C.GoString(tail))
|
|
}
|
|
nv := int(C.sqlite3_bind_parameter_count(s))
|
|
var nn []string
|
|
for i := 0; i < nv; i++ {
|
|
pn := C.GoString(C.sqlite3_bind_parameter_name(s, C.int(i+1)))
|
|
if len(pn) > 1 && pn[0] == '$' && 48 <= pn[1] && pn[1] <= 57 {
|
|
nn = append(nn, C.GoString(C.sqlite3_bind_parameter_name(s, C.int(i+1))))
|
|
}
|
|
}
|
|
ss := &SQLiteStmt{c: c, s: s, nv: nv, nn: nn, t: t}
|
|
runtime.SetFinalizer(ss, (*SQLiteStmt).Close)
|
|
return ss, nil
|
|
}
|
|
|
|
// Close the statement.
|
|
func (s *SQLiteStmt) Close() error {
|
|
if s.closed {
|
|
return nil
|
|
}
|
|
s.closed = true
|
|
if s.c == nil || s.c.db == nil {
|
|
return errors.New("sqlite statement with already closed database connection")
|
|
}
|
|
rv := C.sqlite3_finalize(s.s)
|
|
if rv != C.SQLITE_OK {
|
|
return s.c.lastError()
|
|
}
|
|
runtime.SetFinalizer(s, nil)
|
|
return nil
|
|
}
|
|
|
|
// Return a number of parameters.
|
|
func (s *SQLiteStmt) NumInput() int {
|
|
return s.nv
|
|
}
|
|
|
|
type bindArg struct {
|
|
n int
|
|
v driver.Value
|
|
}
|
|
|
|
func (s *SQLiteStmt) bind(args []driver.Value) error {
|
|
rv := C.sqlite3_reset(s.s)
|
|
if rv != C.SQLITE_ROW && rv != C.SQLITE_OK && rv != C.SQLITE_DONE {
|
|
return s.c.lastError()
|
|
}
|
|
|
|
var vargs []bindArg
|
|
narg := len(args)
|
|
vargs = make([]bindArg, narg)
|
|
if len(s.nn) > 0 {
|
|
for i, v := range s.nn {
|
|
if pi, err := strconv.Atoi(v[1:]); err == nil {
|
|
vargs[i] = bindArg{pi, args[i]}
|
|
}
|
|
}
|
|
} else {
|
|
for i, v := range args {
|
|
vargs[i] = bindArg{i + 1, v}
|
|
}
|
|
}
|
|
|
|
for _, varg := range vargs {
|
|
n := C.int(varg.n)
|
|
v := varg.v
|
|
switch v := v.(type) {
|
|
case nil:
|
|
rv = C.sqlite3_bind_null(s.s, n)
|
|
case string:
|
|
if len(v) == 0 {
|
|
b := []byte{0}
|
|
rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&b[0])), C.int(0))
|
|
} else {
|
|
b := []byte(v)
|
|
rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&b[0])), C.int(len(b)))
|
|
}
|
|
case int64:
|
|
rv = C.sqlite3_bind_int64(s.s, n, C.sqlite3_int64(v))
|
|
case bool:
|
|
if bool(v) {
|
|
rv = C.sqlite3_bind_int(s.s, n, 1)
|
|
} else {
|
|
rv = C.sqlite3_bind_int(s.s, n, 0)
|
|
}
|
|
case float64:
|
|
rv = C.sqlite3_bind_double(s.s, n, C.double(v))
|
|
case []byte:
|
|
if len(v) == 0 {
|
|
rv = C._sqlite3_bind_blob(s.s, n, nil, 0)
|
|
} else {
|
|
rv = C._sqlite3_bind_blob(s.s, n, unsafe.Pointer(&v[0]), C.int(len(v)))
|
|
}
|
|
case time.Time:
|
|
b := []byte(v.Format(SQLiteTimestampFormats[0]))
|
|
rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&b[0])), C.int(len(b)))
|
|
}
|
|
if rv != C.SQLITE_OK {
|
|
return s.c.lastError()
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Query the statement with arguments. Return records.
|
|
func (s *SQLiteStmt) Query(args []driver.Value) (driver.Rows, error) {
|
|
if err := s.bind(args); err != nil {
|
|
return nil, err
|
|
}
|
|
return &SQLiteRows{s, int(C.sqlite3_column_count(s.s)), nil, nil, s.cls}, nil
|
|
}
|
|
|
|
// Return last inserted ID.
|
|
func (r *SQLiteResult) LastInsertId() (int64, error) {
|
|
return r.id, nil
|
|
}
|
|
|
|
// Return how many rows affected.
|
|
func (r *SQLiteResult) RowsAffected() (int64, error) {
|
|
return r.changes, nil
|
|
}
|
|
|
|
// Execute the statement with arguments. Return result object.
|
|
func (s *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
|
|
if err := s.bind(args); err != nil {
|
|
C.sqlite3_reset(s.s)
|
|
C.sqlite3_clear_bindings(s.s)
|
|
return nil, err
|
|
}
|
|
var rowid, changes C.longlong
|
|
rv := C._sqlite3_step(s.s, &rowid, &changes)
|
|
if rv != C.SQLITE_ROW && rv != C.SQLITE_OK && rv != C.SQLITE_DONE {
|
|
err := s.c.lastError()
|
|
C.sqlite3_reset(s.s)
|
|
C.sqlite3_clear_bindings(s.s)
|
|
return nil, err
|
|
}
|
|
return &SQLiteResult{int64(rowid), int64(changes)}, nil
|
|
}
|
|
|
|
// Close the rows.
|
|
func (rc *SQLiteRows) Close() error {
|
|
if rc.s.closed {
|
|
return nil
|
|
}
|
|
if rc.cls {
|
|
return rc.s.Close()
|
|
}
|
|
rv := C.sqlite3_reset(rc.s.s)
|
|
if rv != C.SQLITE_OK {
|
|
return rc.s.c.lastError()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Return column names.
|
|
func (rc *SQLiteRows) Columns() []string {
|
|
if rc.nc != len(rc.cols) {
|
|
rc.cols = make([]string, rc.nc)
|
|
for i := 0; i < rc.nc; i++ {
|
|
rc.cols[i] = C.GoString(C.sqlite3_column_name(rc.s.s, C.int(i)))
|
|
}
|
|
}
|
|
return rc.cols
|
|
}
|
|
|
|
// Return column types.
|
|
func (rc *SQLiteRows) DeclTypes() []string {
|
|
if rc.decltype == nil {
|
|
rc.decltype = make([]string, rc.nc)
|
|
for i := 0; i < rc.nc; i++ {
|
|
rc.decltype[i] = strings.ToLower(C.GoString(C.sqlite3_column_decltype(rc.s.s, C.int(i))))
|
|
}
|
|
}
|
|
return rc.decltype
|
|
}
|
|
|
|
// Move cursor to next.
|
|
func (rc *SQLiteRows) Next(dest []driver.Value) error {
|
|
rv := C.sqlite3_step(rc.s.s)
|
|
if rv == C.SQLITE_DONE {
|
|
return io.EOF
|
|
}
|
|
if rv != C.SQLITE_ROW {
|
|
rv = C.sqlite3_reset(rc.s.s)
|
|
if rv != C.SQLITE_OK {
|
|
return rc.s.c.lastError()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
rc.DeclTypes()
|
|
|
|
for i := range dest {
|
|
switch C.sqlite3_column_type(rc.s.s, C.int(i)) {
|
|
case C.SQLITE_INTEGER:
|
|
val := int64(C.sqlite3_column_int64(rc.s.s, C.int(i)))
|
|
switch rc.decltype[i] {
|
|
case "timestamp", "datetime", "date":
|
|
var t time.Time
|
|
// Assume a millisecond unix timestamp if it's 13 digits -- too
|
|
// large to be a reasonable timestamp in seconds.
|
|
if val > 1e12 || val < -1e12 {
|
|
val *= int64(time.Millisecond) // convert ms to nsec
|
|
} else {
|
|
val *= int64(time.Second) // convert sec to nsec
|
|
}
|
|
t = time.Unix(0, val).UTC()
|
|
if rc.s.c.loc != nil {
|
|
t = t.In(rc.s.c.loc)
|
|
}
|
|
dest[i] = t
|
|
case "boolean":
|
|
dest[i] = val > 0
|
|
default:
|
|
dest[i] = val
|
|
}
|
|
case C.SQLITE_FLOAT:
|
|
dest[i] = float64(C.sqlite3_column_double(rc.s.s, C.int(i)))
|
|
case C.SQLITE_BLOB:
|
|
p := C.sqlite3_column_blob(rc.s.s, C.int(i))
|
|
if p == nil {
|
|
dest[i] = nil
|
|
continue
|
|
}
|
|
n := int(C.sqlite3_column_bytes(rc.s.s, C.int(i)))
|
|
switch dest[i].(type) {
|
|
case sql.RawBytes:
|
|
dest[i] = (*[1 << 30]byte)(unsafe.Pointer(p))[0:n]
|
|
default:
|
|
slice := make([]byte, n)
|
|
copy(slice[:], (*[1 << 30]byte)(unsafe.Pointer(p))[0:n])
|
|
dest[i] = slice
|
|
}
|
|
case C.SQLITE_NULL:
|
|
dest[i] = nil
|
|
case C.SQLITE_TEXT:
|
|
var err error
|
|
var timeVal time.Time
|
|
|
|
n := int(C.sqlite3_column_bytes(rc.s.s, C.int(i)))
|
|
s := C.GoStringN((*C.char)(unsafe.Pointer(C.sqlite3_column_text(rc.s.s, C.int(i)))), C.int(n))
|
|
|
|
switch rc.decltype[i] {
|
|
case "timestamp", "datetime", "date":
|
|
var t time.Time
|
|
s = strings.TrimSuffix(s, "Z")
|
|
for _, format := range SQLiteTimestampFormats {
|
|
if timeVal, err = time.ParseInLocation(format, s, time.UTC); err == nil {
|
|
t = timeVal
|
|
break
|
|
}
|
|
}
|
|
if err != nil {
|
|
// The column is a time value, so return the zero time on parse failure.
|
|
t = time.Time{}
|
|
}
|
|
if rc.s.c.loc != nil {
|
|
t = t.In(rc.s.c.loc)
|
|
}
|
|
dest[i] = t
|
|
default:
|
|
dest[i] = []byte(s)
|
|
}
|
|
|
|
}
|
|
}
|
|
return nil
|
|
}
|