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This commit is contained in:
Gert-Jan Timmer 2018-06-19 17:53:53 +02:00
parent 8221c6527b
commit 2866d285fb
22 changed files with 1559 additions and 227 deletions
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70
_driver/connection_go18.go
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@ -1,70 +0,0 @@
// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
// +build go1.8
package sqlite3
import (
"database/sql/driver"
"errors"
"context"
)
// Ping implement Pinger.
func (c *SQLiteConn) Ping(ctx context.Context) error {
if c.db == nil {
return errors.New("Connection was closed")
}
return nil
}
// QueryContext implement QueryerContext.
func (c *SQLiteConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return c.query(ctx, query, list)
}
// ExecContext implement ExecerContext.
func (c *SQLiteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return c.exec(ctx, query, list)
}
// PrepareContext implement ConnPrepareContext.
func (c *SQLiteConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
return c.prepare(ctx, query)
}
// BeginTx implement ConnBeginTx.
func (c *SQLiteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
return c.begin(ctx)
}
// QueryContext implement QueryerContext.
func (s *SQLiteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return s.query(ctx, list)
}
// ExecContext implement ExecerContext.
func (s *SQLiteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return s.exec(ctx, list)
}

5
_driver/callback.go → driver/callback.go
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@ -1,8 +1,10 @@
// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
// You can't export a Go function to C and have definitions in the C
@ -16,6 +18,7 @@ package sqlite3
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
void _sqlite3_result_text(sqlite3_context* ctx, const char* s);

7
_driver/callback_test.go → driver/callback_test.go
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@ -1,3 +1,10 @@
// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
import (

309
driver/connection.go
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@ -3,7 +3,314 @@
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
type SQLiteConn struct {
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
static int
_sqlite3_open_v2(const char *filename, sqlite3 **ppDb, int flags, const char *zVfs) {
#ifdef SQLITE_OPEN_URI
return sqlite3_open_v2(filename, ppDb, flags | SQLITE_OPEN_URI, zVfs);
#else
return sqlite3_open_v2(filename, ppDb, flags, zVfs);
#endif
}
*/
import "C"
import (
"context"
"database/sql/driver"
"errors"
"fmt"
"reflect"
"runtime"
"strings"
"sync"
"time"
"unsafe"
)
var (
_ driver.Conn = (*SQLiteConn)(nil)
_ driver.Execer = (*SQLiteConn)(nil)
)
// SQLiteConn implement sql.Conn.
type SQLiteConn struct {
mu sync.Mutex
db *C.sqlite3
loc *time.Location
txlock string
funcs []*functionInfo
aggregators []*aggInfo
}
type functionInfo struct {
f reflect.Value
argConverters []callbackArgConverter
variadicConverter callbackArgConverter
retConverter callbackRetConverter
}
func (fi *functionInfo) Call(ctx *C.sqlite3_context, argv []*C.sqlite3_value) {
args, err := callbackConvertArgs(argv, fi.argConverters, fi.variadicConverter)
if err != nil {
callbackError(ctx, err)
return
}
ret := fi.f.Call(args)
if len(ret) == 2 && ret[1].Interface() != nil {
callbackError(ctx, ret[1].Interface().(error))
return
}
err = fi.retConverter(ctx, ret[0])
if err != nil {
callbackError(ctx, err)
return
}
}
type aggInfo struct {
constructor reflect.Value
// Active aggregator objects for aggregations in flight. The
// aggregators are indexed by a counter stored in the aggregation
// user data space provided by sqlite.
active map[int64]reflect.Value
next int64
stepArgConverters []callbackArgConverter
stepVariadicConverter callbackArgConverter
doneRetConverter callbackRetConverter
}
func (ai *aggInfo) agg(ctx *C.sqlite3_context) (int64, reflect.Value, error) {
aggIdx := (*int64)(C.sqlite3_aggregate_context(ctx, C.int(8)))
if *aggIdx == 0 {
*aggIdx = ai.next
ret := ai.constructor.Call(nil)
if len(ret) == 2 && ret[1].Interface() != nil {
return 0, reflect.Value{}, ret[1].Interface().(error)
}
if ret[0].IsNil() {
return 0, reflect.Value{}, errors.New("aggregator constructor returned nil state")
}
ai.next++
ai.active[*aggIdx] = ret[0]
}
return *aggIdx, ai.active[*aggIdx], nil
}
func (ai *aggInfo) Step(ctx *C.sqlite3_context, argv []*C.sqlite3_value) {
_, agg, err := ai.agg(ctx)
if err != nil {
callbackError(ctx, err)
return
}
args, err := callbackConvertArgs(argv, ai.stepArgConverters, ai.stepVariadicConverter)
if err != nil {
callbackError(ctx, err)
return
}
ret := agg.MethodByName("Step").Call(args)
if len(ret) == 1 && ret[0].Interface() != nil {
callbackError(ctx, ret[0].Interface().(error))
return
}
}
func (ai *aggInfo) Done(ctx *C.sqlite3_context) {
idx, agg, err := ai.agg(ctx)
if err != nil {
callbackError(ctx, err)
return
}
defer func() { delete(ai.active, idx) }()
ret := agg.MethodByName("Done").Call(nil)
if len(ret) == 2 && ret[1].Interface() != nil {
callbackError(ctx, ret[1].Interface().(error))
return
}
err = ai.doneRetConverter(ctx, ret[0])
if err != nil {
callbackError(ctx, err)
return
}
}
type namedValue struct {
Name string
Ordinal int
Value driver.Value
}
// Query implements Queryer.
func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, error) {
list := make([]namedValue, len(args))
for i, v := range args {
list[i] = namedValue{
Ordinal: i + 1,
Value: v,
}
}
return c.query(context.Background(), query, list)
}
func (c *SQLiteConn) query(ctx context.Context, query string, args []namedValue) (driver.Rows, error) {
start := 0
for {
s, err := c.prepare(ctx, 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: want %d got %d", na, len(args))
}
for i := 0; i < na; i++ {
args[i].Ordinal -= start
}
rows, err := s.(*SQLiteStmt).query(ctx, args[:na])
if err != nil && err != driver.ErrSkip {
s.Close()
return rows, err
}
args = args[na:]
start += na
tail := s.(*SQLiteStmt).t
if tail == "" {
return rows, nil
}
rows.Close()
s.Close()
query = tail
}
}
// Exec implements Execer.
func (c *SQLiteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
fmt.Println("Exec()")
list := make([]namedValue, len(args))
for i, v := range args {
list[i] = namedValue{
Ordinal: i + 1,
Value: v,
}
}
return c.exec(context.Background(), query, list)
}
func (c *SQLiteConn) exec(ctx context.Context, query string, args []namedValue) (driver.Result, error) {
start := 0
for {
s, err := c.prepare(ctx, query)
if err != nil {
return nil, err
}
var res driver.Result
if s.(*SQLiteStmt).s != nil {
na := s.NumInput()
if len(args) < na {
s.Close()
return nil, fmt.Errorf("not enough args to execute query: want %d got %d", na, len(args))
}
for i := 0; i < na; i++ {
args[i].Ordinal -= start
}
res, err = s.(*SQLiteStmt).exec(ctx, args[:na])
if err != nil && err != driver.ErrSkip {
s.Close()
fmt.Printf("exec() %s\n", err)
return nil, err
}
args = args[na:]
start += na
}
tail := s.(*SQLiteStmt).t
s.Close()
if tail == "" {
return res, nil
}
query = tail
}
}
// AutoCommit return which currently auto commit or not.
func (c *SQLiteConn) AutoCommit() bool {
return int(C.sqlite3_get_autocommit(c.db)) != 0
}
// GetFilename returns the absolute path to the file containing
// the requested schema. When passed an empty string, it will
// instead use the database's default schema: "main".
// See: sqlite3_db_filename, https://www.sqlite.org/c3ref/db_filename.html
func (c *SQLiteConn) GetFilename(schemaName string) string {
if schemaName == "" {
schemaName = "main"
}
return C.GoString(C.sqlite3_db_filename(c.db, C.CString(schemaName)))
}
// Close the connection.
func (c *SQLiteConn) Close() error {
rv := C.sqlite3_close_v2(c.db)
if rv != C.SQLITE_OK {
return c.lastError()
}
deleteHandles(c)
c.mu.Lock()
c.db = nil
c.mu.Unlock()
runtime.SetFinalizer(c, nil)
return nil
}
func (c *SQLiteConn) dbConnOpen() bool {
if c == nil {
return false
}
c.mu.Lock()
defer c.mu.Unlock()
return c.db != nil
}
// Prepare the query string. Return a new statement.
func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
return c.prepare(context.Background(), query)
}
func (c *SQLiteConn) prepare(ctx context.Context, 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))
}
ss := &SQLiteStmt{c: c, s: s, t: t}
runtime.SetFinalizer(ss, (*SQLiteStmt).Close)
return ss, nil
}

53
driver/connection_go18.go
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@ -3,6 +3,59 @@
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
// +build go1.8
package sqlite3
import (
"database/sql/driver"
"errors"
"context"
)
// Enforce implementation
var (
_ driver.ConnBeginTx = (*SQLiteConn)(nil)
_ driver.ConnPrepareContext = (*SQLiteConn)(nil)
_ driver.ExecerContext = (*SQLiteConn)(nil)
_ driver.QueryerContext = (*SQLiteConn)(nil)
_ driver.Pinger = (*SQLiteConn)(nil)
)
// Ping implement Pinger.
func (c *SQLiteConn) Ping(ctx context.Context) error {
if c.db == nil {
return errors.New("Connection was closed")
}
return nil
}
// QueryContext implement QueryerContext.
func (c *SQLiteConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return c.query(ctx, query, list)
}
// ExecContext implement ExecerContext.
func (c *SQLiteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return c.exec(ctx, query, list)
}
// PrepareContext implement ConnPrepareContext.
func (c *SQLiteConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
return c.prepare(ctx, query)
}
// BeginTx implement ConnBeginTx.
func (c *SQLiteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
return c.begin(ctx)
}

0
_driver/connection_go18_test.go → driver/connection_go18_test.go
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5
driver/connector.go
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@ -3,6 +3,7 @@
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
// +build go1.10
package sqlite3
@ -12,6 +13,10 @@ import (
"database/sql/driver"
)
var (
_ driver.Connector = (*Connector)(nil)
)
// Connector is a driver in a fixed configuration.
type Connector struct {
}

53
driver/const.go Normal file
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@ -0,0 +1,53 @@
// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
*/
import "C"
const (
SQLiteDelete = C.SQLITE_DELETE
SQLiteInsert = C.SQLITE_INSERT
SQLiteUpdate = C.SQLITE_UPDATE
)
// Backward compliant
const (
SQLITE_DELETE = SQLiteDelete
SQLITE_INSERT = SQLiteInsert
SQLITE_UPDATE = SQLiteUpdate
)
const (
columnDate string = "date"
columnDatetime string = "datetime"
columnTimestamp string = "timestamp"
)
// Run-Time Limit Categories.
// See: http://www.sqlite.org/c3ref/c_limit_attached.html
const (
SQLITE_LIMIT_LENGTH = C.SQLITE_LIMIT_LENGTH
SQLITE_LIMIT_SQL_LENGTH = C.SQLITE_LIMIT_SQL_LENGTH
SQLITE_LIMIT_COLUMN = C.SQLITE_LIMIT_COLUMN
SQLITE_LIMIT_EXPR_DEPTH = C.SQLITE_LIMIT_EXPR_DEPTH
SQLITE_LIMIT_COMPOUND_SELECT = C.SQLITE_LIMIT_COMPOUND_SELECT
SQLITE_LIMIT_VDBE_OP = C.SQLITE_LIMIT_VDBE_OP
SQLITE_LIMIT_FUNCTION_ARG = C.SQLITE_LIMIT_FUNCTION_ARG
SQLITE_LIMIT_ATTACHED = C.SQLITE_LIMIT_ATTACHED
SQLITE_LIMIT_LIKE_PATTERN_LENGTH = C.SQLITE_LIMIT_LIKE_PATTERN_LENGTH
SQLITE_LIMIT_VARIABLE_NUMBER = C.SQLITE_LIMIT_VARIABLE_NUMBER
SQLITE_LIMIT_TRIGGER_DEPTH = C.SQLITE_LIMIT_TRIGGER_DEPTH
SQLITE_LIMIT_WORKER_THREADS = C.SQLITE_LIMIT_WORKER_THREADS
)

5
_driver/sqlite3_context.go → driver/context.go
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@ -1,8 +1,10 @@
// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
@ -11,6 +13,7 @@ package sqlite3
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
// These wrappers are necessary because SQLITE_TRANSIENT

69
driver/driver.go
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@ -3,8 +3,71 @@
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
// SQLiteDriver is exported to make the driver directly accessible.
// In general the driver is used via the database/sql package.
type SQLiteDriver struct{}
/*
#cgo CFLAGS: -std=gnu99
#cgo CFLAGS: -DSQLITE_ENABLE_RTREE
#cgo CFLAGS: -DSQLITE_THREADSAFE=1
#cgo CFLAGS: -DHAVE_USLEEP=1
#cgo CFLAGS: -DSQLITE_ENABLE_FTS3
#cgo CFLAGS: -DSQLITE_ENABLE_FTS3_PARENTHESIS
#cgo CFLAGS: -DSQLITE_ENABLE_FTS4_UNICODE61
#cgo CFLAGS: -DSQLITE_TRACE_SIZE_LIMIT=15
#cgo CFLAGS: -DSQLITE_OMIT_DEPRECATED
#cgo CFLAGS: -DSQLITE_DISABLE_INTRINSIC
#cgo CFLAGS: -DSQLITE_DEFAULT_WAL_SYNCHRONOUS=1
#cgo CFLAGS: -DSQLITE_ENABLE_UPDATE_DELETE_LIMIT
#cgo CFLAGS: -Wno-deprecated-declarations
#cgo linux,!android CFLAGS: -DHAVE_PREAD64=1 -DHAVE_PWRITE64=1
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
#include <string.h>
#ifdef __CYGWIN__
# include <errno.h>
#endif
#ifndef SQLITE_OPEN_READWRITE
# define SQLITE_OPEN_READWRITE 0
#endif
#ifndef SQLITE_OPEN_FULLMUTEX
# define SQLITE_OPEN_FULLMUTEX 0
#endif
#ifndef SQLITE_DETERMINISTIC
# define SQLITE_DETERMINISTIC 0
#endif
*/
import "C"
import (
"database/sql"
"database/sql/driver"
)
var (
_ driver.Driver = (*SQLiteDriver)(nil)
)
func init() {
sql.Register("sqlite3", &SQLiteDriver{})
}
// SQLiteDriver implement sql.Driver.
type SQLiteDriver struct {
Extensions []string
ConnectHook func(*SQLiteConn) error
}
// Open database and return a new connection.
func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
return nil, nil
}

16
driver/driver_go110.go
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@ -3,6 +3,22 @@
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
// +build go1.10
package sqlite3
import "database/sql/driver"
var (
_ driver.DriverContext = (*SQLiteDriver)(nil)
)
// OpenConnector will call OpenConnector to obtain a Connector and then invoke
// that Connector's Conn method to obtain each needed connection,
// instead of invoking the Driver's Open method for each connection.
// The two-step sequence allows drivers to parse the name just once and also provides
// access to per-Conn contexts.
func (d *SQLiteDriver) OpenConnector(name string) (driver.Connector, error) {
return nil, nil
}

41
_driver/error.go → driver/error.go
View File

@ -1,11 +1,29 @@
// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
#include <string.h>
#ifdef __CYGWIN__
# include <errno.h>
#endif
*/
import "C"
import (
"fmt"
)
// ErrNo inherit errno.
type ErrNo int
@ -133,3 +151,24 @@ var (
ErrNoticeRecoverRollback = ErrNotice.Extend(2)
ErrWarningAutoIndex = ErrWarning.Extend(1)
)
func lastError(db *C.sqlite3) error {
rv := C.sqlite3_errcode(db)
if rv == C.SQLITE_OK {
return nil
}
return Error{
Code: ErrNo(rv),
ExtendedCode: ErrNoExtended(C.sqlite3_extended_errcode(db)),
err: C.GoString(C.sqlite3_errmsg(db)),
}
}
func errorString(err Error) string {
fmt.Println("errorString")
return C.GoString(C.sqlite3_errstr(C.int(err.Code)))
}
func (c *SQLiteConn) lastError() error {
return lastError(c.db)
}

0
_driver/error_test.go → driver/error_test.go
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274
driver/func.go Normal file
View File

@ -0,0 +1,274 @@
// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
void callbackTrampoline(sqlite3_context*, int, sqlite3_value**);
void stepTrampoline(sqlite3_context*, int, sqlite3_value**);
void doneTrampoline(sqlite3_context*);
int compareTrampoline(void*, int, char*, int, char*);
int _sqlite3_create_function(
sqlite3 *db,
const char *zFunctionName,
int nArg,
int eTextRep,
uintptr_t pApp,
void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
void (*xStep)(sqlite3_context*,int,sqlite3_value**),
void (*xFinal)(sqlite3_context*)
) {
return sqlite3_create_function(db, zFunctionName, nArg, eTextRep, (void*) pApp, xFunc, xStep, xFinal);
}
*/
import "C"
import (
"errors"
"reflect"
"unsafe"
)
func sqlite3CreateFunction(db *C.sqlite3, zFunctionName *C.char, nArg C.int, eTextRep C.int, pApp uintptr, xFunc unsafe.Pointer, xStep unsafe.Pointer, xFinal unsafe.Pointer) C.int {
return C._sqlite3_create_function(db, zFunctionName, nArg, eTextRep, C.uintptr_t(pApp), (*[0]byte)(xFunc), (*[0]byte)(xStep), (*[0]byte)(xFinal))
}
// RegisterCollation makes a Go function available as a collation.
//
// cmp receives two UTF-8 strings, a and b. The result should be 0 if
// a==b, -1 if a < b, and +1 if a > b.
//
// cmp must always return the same result given the same
// inputs. Additionally, it must have the following properties for all
// strings A, B and C: if A==B then B==A; if A==B and B==C then A==C;
// if A<B then B>A; if A<B and B<C then A<C.
//
// If cmp does not obey these constraints, sqlite3's behavior is
// undefined when the collation is used.
func (c *SQLiteConn) RegisterCollation(name string, cmp func(string, string) int) error {
handle := newHandle(c, cmp)
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
rv := C.sqlite3_create_collation(c.db, cname, C.SQLITE_UTF8, unsafe.Pointer(handle), (*[0]byte)(unsafe.Pointer(C.compareTrampoline)))
if rv != C.SQLITE_OK {
return c.lastError()
}
return nil
}
// RegisterFunc makes a Go function available as a SQLite function.
//
// The Go function can have arguments of the following types: any
// numeric type except complex, bool, []byte, string and
// interface{}. interface{} arguments are given the direct translation
// of the SQLite data type: int64 for INTEGER, float64 for FLOAT,
// []byte for BLOB, string for TEXT.
//
// The function can additionally be variadic, as long as the type of
// the variadic argument is one of the above.
//
// If pure is true. SQLite will assume that the function's return
// value depends only on its inputs, and make more aggressive
// optimizations in its queries.
//
// See _example/go_custom_funcs for a detailed example.
func (c *SQLiteConn) RegisterFunc(name string, impl interface{}, pure bool) error {
var fi functionInfo
fi.f = reflect.ValueOf(impl)
t := fi.f.Type()
if t.Kind() != reflect.Func {
return errors.New("Non-function passed to RegisterFunc")
}
if t.NumOut() != 1 && t.NumOut() != 2 {
return errors.New("SQLite functions must return 1 or 2 values")
}
if t.NumOut() == 2 && !t.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
return errors.New("Second return value of SQLite function must be error")
}
numArgs := t.NumIn()
if t.IsVariadic() {
numArgs--
}
for i := 0; i < numArgs; i++ {
conv, err := callbackArg(t.In(i))
if err != nil {
return err
}
fi.argConverters = append(fi.argConverters, conv)
}
if t.IsVariadic() {
conv, err := callbackArg(t.In(numArgs).Elem())
if err != nil {
return err
}
fi.variadicConverter = conv
// Pass -1 to sqlite so that it allows any number of
// arguments. The call helper verifies that the minimum number
// of arguments is present for variadic functions.
numArgs = -1
}
conv, err := callbackRet(t.Out(0))
if err != nil {
return err
}
fi.retConverter = conv
// fi must outlast the database connection, or we'll have dangling pointers.
c.funcs = append(c.funcs, &fi)
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
opts := C.SQLITE_UTF8
if pure {
opts |= C.SQLITE_DETERMINISTIC
}
rv := sqlite3CreateFunction(c.db, cname, C.int(numArgs), C.int(opts), newHandle(c, &fi), C.callbackTrampoline, nil, nil)
if rv != C.SQLITE_OK {
return c.lastError()
}
return nil
}
// RegisterAggregator makes a Go type available as a SQLite aggregation function.
//
// Because aggregation is incremental, it's implemented in Go with a
// type that has 2 methods: func Step(values) accumulates one row of
// data into the accumulator, and func Done() ret finalizes and
// returns the aggregate value. "values" and "ret" may be any type
// supported by RegisterFunc.
//
// RegisterAggregator takes as implementation a constructor function
// that constructs an instance of the aggregator type each time an
// aggregation begins. The constructor must return a pointer to a
// type, or an interface that implements Step() and Done().
//
// The constructor function and the Step/Done methods may optionally
// return an error in addition to their other return values.
//
// See _example/go_custom_funcs for a detailed example.
func (c *SQLiteConn) RegisterAggregator(name string, impl interface{}, pure bool) error {
var ai aggInfo
ai.constructor = reflect.ValueOf(impl)
t := ai.constructor.Type()
if t.Kind() != reflect.Func {
return errors.New("non-function passed to RegisterAggregator")
}
if t.NumOut() != 1 && t.NumOut() != 2 {
return errors.New("SQLite aggregator constructors must return 1 or 2 values")
}
if t.NumOut() == 2 && !t.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
return errors.New("Second return value of SQLite function must be error")
}
if t.NumIn() != 0 {
return errors.New("SQLite aggregator constructors must not have arguments")
}
agg := t.Out(0)
switch agg.Kind() {
case reflect.Ptr, reflect.Interface:
default:
return errors.New("SQlite aggregator constructor must return a pointer object")
}
stepFn, found := agg.MethodByName("Step")
if !found {
return errors.New("SQlite aggregator doesn't have a Step() function")
}
step := stepFn.Type
if step.NumOut() != 0 && step.NumOut() != 1 {
return errors.New("SQlite aggregator Step() function must return 0 or 1 values")
}
if step.NumOut() == 1 && !step.Out(0).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
return errors.New("type of SQlite aggregator Step() return value must be error")
}
stepNArgs := step.NumIn()
start := 0
if agg.Kind() == reflect.Ptr {
// Skip over the method receiver
stepNArgs--
start++
}
if step.IsVariadic() {
stepNArgs--
}
for i := start; i < start+stepNArgs; i++ {
conv, err := callbackArg(step.In(i))
if err != nil {
return err
}
ai.stepArgConverters = append(ai.stepArgConverters, conv)
}
if step.IsVariadic() {
conv, err := callbackArg(t.In(start + stepNArgs).Elem())
if err != nil {
return err
}
ai.stepVariadicConverter = conv
// Pass -1 to sqlite so that it allows any number of
// arguments. The call helper verifies that the minimum number
// of arguments is present for variadic functions.
stepNArgs = -1
}
doneFn, found := agg.MethodByName("Done")
if !found {
return errors.New("SQlite aggregator doesn't have a Done() function")
}
done := doneFn.Type
doneNArgs := done.NumIn()
if agg.Kind() == reflect.Ptr {
// Skip over the method receiver
doneNArgs--
}
if doneNArgs != 0 {
return errors.New("SQlite aggregator Done() function must have no arguments")
}
if done.NumOut() != 1 && done.NumOut() != 2 {
return errors.New("SQLite aggregator Done() function must return 1 or 2 values")
}
if done.NumOut() == 2 && !done.Out(1).Implements(reflect.TypeOf((*error)(nil)).Elem()) {
return errors.New("second return value of SQLite aggregator Done() function must be error")
}
conv, err := callbackRet(done.Out(0))
if err != nil {
return err
}
ai.doneRetConverter = conv
ai.active = make(map[int64]reflect.Value)
ai.next = 1
// ai must outlast the database connection, or we'll have dangling pointers.
c.aggregators = append(c.aggregators, &ai)
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
opts := C.SQLITE_UTF8
if pure {
opts |= C.SQLITE_DETERMINISTIC
}
rv := sqlite3CreateFunction(c.db, cname, C.int(stepNArgs), C.int(opts), newHandle(c, &ai), nil, C.stepTrampoline, C.doneTrampoline)
if rv != C.SQLITE_OK {
return c.lastError()
}
return nil
}

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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
#include <string.h>
int commitHookTrampoline(void*);
void rollbackHookTrampoline(void*);
void updateHookTrampoline(void*, int, char*, char*, sqlite3_int64);
*/
import "C"
import "unsafe"
// RegisterCommitHook sets the commit hook for a connection.
//
// If the callback returns non-zero the transaction will become a rollback.
//
// If there is an existing commit hook for this connection, it will be
// removed. If callback is nil the existing hook (if any) will be removed
// without creating a new one.
func (c *SQLiteConn) RegisterCommitHook(callback func() int) {
if callback == nil {
C.sqlite3_commit_hook(c.db, nil, nil)
} else {
C.sqlite3_commit_hook(c.db, (*[0]byte)(C.commitHookTrampoline), unsafe.Pointer(newHandle(c, callback)))
}
}
// RegisterRollbackHook sets the rollback hook for a connection.
//
// If there is an existing rollback hook for this connection, it will be
// removed. If callback is nil the existing hook (if any) will be removed
// without creating a new one.
func (c *SQLiteConn) RegisterRollbackHook(callback func()) {
if callback == nil {
C.sqlite3_rollback_hook(c.db, nil, nil)
} else {
C.sqlite3_rollback_hook(c.db, (*[0]byte)(C.rollbackHookTrampoline), unsafe.Pointer(newHandle(c, callback)))
}
}
// RegisterUpdateHook sets the update hook for a connection.
//
// The parameters to the callback are the operation (one of the constants
// SQLITE_INSERT, SQLITE_DELETE, or SQLITE_UPDATE), the database name, the
// table name, and the rowid.
//
// If there is an existing update hook for this connection, it will be
// removed. If callback is nil the existing hook (if any) will be removed
// without creating a new one.
func (c *SQLiteConn) RegisterUpdateHook(callback func(int, string, string, int64)) {
if callback == nil {
C.sqlite3_update_hook(c.db, nil, nil)
} else {
C.sqlite3_update_hook(c.db, (*[0]byte)(C.updateHookTrampoline), unsafe.Pointer(newHandle(c, callback)))
}
}

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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
#include <string.h>
#ifdef SQLITE_LIMIT_WORKER_THREADS
# define _SQLITE_HAS_LIMIT
# define SQLITE_LIMIT_LENGTH 0
# define SQLITE_LIMIT_SQL_LENGTH 1
# define SQLITE_LIMIT_COLUMN 2
# define SQLITE_LIMIT_EXPR_DEPTH 3
# define SQLITE_LIMIT_COMPOUND_SELECT 4
# define SQLITE_LIMIT_VDBE_OP 5
# define SQLITE_LIMIT_FUNCTION_ARG 6
# define SQLITE_LIMIT_ATTACHED 7
# define SQLITE_LIMIT_LIKE_PATTERN_LENGTH 8
# define SQLITE_LIMIT_VARIABLE_NUMBER 9
# define SQLITE_LIMIT_TRIGGER_DEPTH 10
# define SQLITE_LIMIT_WORKER_THREADS 11
# else
# define SQLITE_LIMIT_WORKER_THREADS 11
#endif
static int _sqlite3_limit(sqlite3* db, int limitId, int newLimit) {
#ifndef _SQLITE_HAS_LIMIT
return -1;
#else
return sqlite3_limit(db, limitId, newLimit);
#endif
}
*/
import "C"
// GetLimit returns the current value of a run-time limit.
// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
func (c *SQLiteConn) GetLimit(id int) int {
return int(C._sqlite3_limit(c.db, C.int(id), -1))
}
// SetLimit changes the value of a run-time limits.
// Then this method returns the prior value of the limit.
// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
func (c *SQLiteConn) SetLimit(id int, newVal int) int {
return int(C._sqlite3_limit(c.db, C.int(id), C.int(newVal)))
}

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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
void _sqlite3_result_text(sqlite3_context* ctx, const char* s) {
sqlite3_result_text(ctx, s, -1, &free);
}
void _sqlite3_result_blob(sqlite3_context* ctx, const void* b, int l) {
sqlite3_result_blob(ctx, b, l, SQLITE_TRANSIENT);
}
*/
import "C"
import (
"database/sql/driver"
"io"
"strings"
"time"
"unsafe"
)
var (
_ driver.Result = (*SQLiteResult)(nil)
_ driver.Rows = (*SQLiteRows)(nil)
)
// SQLiteResult implement sql.Result.
type SQLiteResult struct {
id int64
changes int64
}
// SQLiteRows implement sql.Rows.
type SQLiteRows struct {
s *SQLiteStmt
nc int
cols []string
decltype []string
cls bool
closed bool
done chan struct{}
}
// LastInsertId teturn last inserted ID.
func (r *SQLiteResult) LastInsertId() (int64, error) {
return r.id, nil
}
// RowsAffected return how many rows affected.
func (r *SQLiteResult) RowsAffected() (int64, error) {
return r.changes, nil
}
// Close the rows.
func (rc *SQLiteRows) Close() error {
rc.s.mu.Lock()
if rc.s.closed || rc.closed {
rc.s.mu.Unlock()
return nil
}
rc.closed = true
if rc.done != nil {
close(rc.done)
}
if rc.cls {
rc.s.mu.Unlock()
return rc.s.Close()
}
rv := C.sqlite3_reset(rc.s.s)
if rv != C.SQLITE_OK {
rc.s.mu.Unlock()
return rc.s.c.lastError()
}
rc.s.mu.Unlock()
return nil
}
// Columns return column names.
func (rc *SQLiteRows) Columns() []string {
rc.s.mu.Lock()
defer rc.s.mu.Unlock()
if rc.s.s != nil && 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
}
func (rc *SQLiteRows) declTypes() []string {
if rc.s.s != nil && 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
}
// DeclTypes return column types.
func (rc *SQLiteRows) DeclTypes() []string {
rc.s.mu.Lock()
defer rc.s.mu.Unlock()
return rc.declTypes()
}
// Next move cursor to next.
func (rc *SQLiteRows) Next(dest []driver.Value) error {
if rc.s.closed {
return io.EOF
}
rc.s.mu.Lock()
defer rc.s.mu.Unlock()
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 columnTimestamp, columnDatetime, columnDate:
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
t = time.Unix(0, val)
} else {
t = time.Unix(val, 0)
}
t = t.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) {
default:
slice := make([]byte, n)
copy(slice[:], (*[1 << 30]byte)(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 columnTimestamp, columnDatetime, columnDate:
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
}

150
driver/sqlite3.go
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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#cgo CFLAGS: -DSQLITE_ENABLE_RTREE
#cgo CFLAGS: -DSQLITE_THREADSAFE=1
#cgo CFLAGS: -DHAVE_USLEEP=1
#cgo CFLAGS: -DSQLITE_ENABLE_FTS3
#cgo CFLAGS: -DSQLITE_ENABLE_FTS3_PARENTHESIS
#cgo CFLAGS: -DSQLITE_ENABLE_FTS4_UNICODE61
#cgo CFLAGS: -DSQLITE_TRACE_SIZE_LIMIT=15
#cgo CFLAGS: -DSQLITE_OMIT_DEPRECATED
#cgo CFLAGS: -DSQLITE_DISABLE_INTRINSIC
#cgo CFLAGS: -DSQLITE_DEFAULT_WAL_SYNCHRONOUS=1
#cgo CFLAGS: -DSQLITE_ENABLE_UPDATE_DELETE_LIMIT
#cgo CFLAGS: -Wno-deprecated-declarations
#cgo CFLAGS: -std=gnu99
#cgo linux,!android CFLAGS: -DHAVE_PREAD64=1 -DHAVE_PWRITE64=1
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
#include <string.h>
#ifdef __CYGWIN__
# include <errno.h>
#endif
#ifndef SQLITE_OPEN_READWRITE
# define SQLITE_OPEN_READWRITE 0
#endif
#ifndef SQLITE_OPEN_FULLMUTEX
# define SQLITE_OPEN_FULLMUTEX 0
#endif
#ifndef SQLITE_DETERMINISTIC
# define SQLITE_DETERMINISTIC 0
#endif
static int
_sqlite3_open_v2(const char *filename, sqlite3 **ppDb, int flags, const char *zVfs) {
#ifdef SQLITE_OPEN_URI
return sqlite3_open_v2(filename, ppDb, flags | SQLITE_OPEN_URI, zVfs);
#else
return sqlite3_open_v2(filename, ppDb, flags, zVfs);
#endif
}
static int
_sqlite3_bind_text(sqlite3_stmt *stmt, int n, char *p, int np) {
return sqlite3_bind_text(stmt, n, p, np, SQLITE_TRANSIENT);
}
static int
_sqlite3_bind_blob(sqlite3_stmt *stmt, int n, void *p, int np) {
return sqlite3_bind_blob(stmt, n, p, np, SQLITE_TRANSIENT);
}
#include <stdio.h>
#include <stdint.h>
static int
_sqlite3_exec(sqlite3* db, const char* pcmd, long long* rowid, long long* changes)
{
int rv = sqlite3_exec(db, pcmd, 0, 0, 0);
*rowid = (long long) sqlite3_last_insert_rowid(db);
*changes = (long long) sqlite3_changes(db);
return rv;
}
static int
_sqlite3_step(sqlite3_stmt* stmt, long long* rowid, long long* changes)
{
int rv = sqlite3_step(stmt);
sqlite3* db = sqlite3_db_handle(stmt);
*rowid = (long long) sqlite3_last_insert_rowid(db);
*changes = (long long) sqlite3_changes(db);
return rv;
}
void _sqlite3_result_text(sqlite3_context* ctx, const char* s) {
sqlite3_result_text(ctx, s, -1, &free);
}
void _sqlite3_result_blob(sqlite3_context* ctx, const void* b, int l) {
sqlite3_result_blob(ctx, b, l, SQLITE_TRANSIENT);
}
int _sqlite3_create_function(
sqlite3 *db,
const char *zFunctionName,
int nArg,
int eTextRep,
uintptr_t pApp,
void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
void (*xStep)(sqlite3_context*,int,sqlite3_value**),
void (*xFinal)(sqlite3_context*)
) {
return sqlite3_create_function(db, zFunctionName, nArg, eTextRep, (void*) pApp, xFunc, xStep, xFinal);
}
void callbackTrampoline(sqlite3_context*, int, sqlite3_value**);
void stepTrampoline(sqlite3_context*, int, sqlite3_value**);
void doneTrampoline(sqlite3_context*);
int compareTrampoline(void*, int, char*, int, char*);
int commitHookTrampoline(void*);
void rollbackHookTrampoline(void*);
void updateHookTrampoline(void*, int, char*, char*, sqlite3_int64);
#ifdef SQLITE_LIMIT_WORKER_THREADS
# define _SQLITE_HAS_LIMIT
# define SQLITE_LIMIT_LENGTH 0
# define SQLITE_LIMIT_SQL_LENGTH 1
# define SQLITE_LIMIT_COLUMN 2
# define SQLITE_LIMIT_EXPR_DEPTH 3
# define SQLITE_LIMIT_COMPOUND_SELECT 4
# define SQLITE_LIMIT_VDBE_OP 5
# define SQLITE_LIMIT_FUNCTION_ARG 6
# define SQLITE_LIMIT_ATTACHED 7
# define SQLITE_LIMIT_LIKE_PATTERN_LENGTH 8
# define SQLITE_LIMIT_VARIABLE_NUMBER 9
# define SQLITE_LIMIT_TRIGGER_DEPTH 10
# define SQLITE_LIMIT_WORKER_THREADS 11
# else
# define SQLITE_LIMIT_WORKER_THREADS 11
#endif
static int _sqlite3_limit(sqlite3* db, int limitId, int newLimit) {
#ifndef _SQLITE_HAS_LIMIT
return -1;
#else
return sqlite3_limit(db, limitId, newLimit);
#endif
}
*/
import "C"

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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
static int
_sqlite3_bind_text(sqlite3_stmt *stmt, int n, char *p, int np) {
return sqlite3_bind_text(stmt, n, p, np, SQLITE_TRANSIENT);
}
static int
_sqlite3_bind_blob(sqlite3_stmt *stmt, int n, void *p, int np) {
return sqlite3_bind_blob(stmt, n, p, np, SQLITE_TRANSIENT);
}
static int
_sqlite3_step(sqlite3_stmt* stmt, long long* rowid, long long* changes)
{
int rv = sqlite3_step(stmt);
sqlite3* db = sqlite3_db_handle(stmt);
*rowid = (long long) sqlite3_last_insert_rowid(db);
*changes = (long long) sqlite3_changes(db);
return rv;
}
*/
import "C"
import (
"context"
"database/sql/driver"
"errors"
"runtime"
"sync"
"time"
"unsafe"
)
var (
_ driver.Stmt = (*SQLiteStmt)(nil)
)
// SQLiteStmt implement sql.Stmt.
type SQLiteStmt struct {
mu sync.Mutex
c *SQLiteConn
s *C.sqlite3_stmt
t string
closed bool
cls bool
}
// Close the statement.
func (s *SQLiteStmt) Close() error {
s.mu.Lock()
defer s.mu.Unlock()
if s.closed {
return nil
}
s.closed = true
if !s.c.dbConnOpen() {
return errors.New("sqlite statement with already closed database connection")
}
rv := C.sqlite3_finalize(s.s)
s.s = nil
if rv != C.SQLITE_OK {
return s.c.lastError()
}
runtime.SetFinalizer(s, nil)
return nil
}
// NumInput return a number of parameters.
func (s *SQLiteStmt) NumInput() int {
return int(C.sqlite3_bind_parameter_count(s.s))
}
type bindArg struct {
n int
v driver.Value
}
var placeHolder = []byte{0}
func (s *SQLiteStmt) bind(args []namedValue) error {
rv := C.sqlite3_reset(s.s)
if rv != C.SQLITE_ROW && rv != C.SQLITE_OK && rv != C.SQLITE_DONE {
return s.c.lastError()
}
for i, v := range args {
if v.Name != "" {
cname := C.CString(":" + v.Name)
args[i].Ordinal = int(C.sqlite3_bind_parameter_index(s.s, cname))
C.free(unsafe.Pointer(cname))
}
}
for _, arg := range args {
n := C.int(arg.Ordinal)
switch v := arg.Value.(type) {
case nil:
rv = C.sqlite3_bind_null(s.s, n)
case string:
if len(v) == 0 {
rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&placeHolder[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 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 v == nil {
rv = C.sqlite3_bind_null(s.s, n)
} else {
ln := len(v)
if ln == 0 {
v = placeHolder
}
rv = C._sqlite3_bind_blob(s.s, n, unsafe.Pointer(&v[0]), C.int(ln))
}
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) {
list := make([]namedValue, len(args))
for i, v := range args {
list[i] = namedValue{
Ordinal: i + 1,
Value: v,
}
}
return s.query(context.Background(), list)
}
func (s *SQLiteStmt) query(ctx context.Context, args []namedValue) (driver.Rows, error) {
if err := s.bind(args); err != nil {
return nil, err
}
rows := &SQLiteRows{
s: s,
nc: int(C.sqlite3_column_count(s.s)),
cols: nil,
decltype: nil,
cls: s.cls,
closed: false,
done: make(chan struct{}),
}
if ctxdone := ctx.Done(); ctxdone != nil {
go func(db *C.sqlite3) {
select {
case <-ctxdone:
select {
case <-rows.done:
default:
C.sqlite3_interrupt(db)
rows.Close()
}
case <-rows.done:
}
}(s.c.db)
}
return rows, nil
}
// Exec execute the statement with arguments. Return result object.
func (s *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
list := make([]namedValue, len(args))
for i, v := range args {
list[i] = namedValue{
Ordinal: i + 1,
Value: v,
}
}
return s.exec(context.Background(), list)
}
func (s *SQLiteStmt) exec(ctx context.Context, args []namedValue) (driver.Result, error) {
if err := s.bind(args); err != nil {
C.sqlite3_reset(s.s)
C.sqlite3_clear_bindings(s.s)
return nil, err
}
if ctxdone := ctx.Done(); ctxdone != nil {
done := make(chan struct{})
defer close(done)
go func(db *C.sqlite3) {
select {
case <-done:
case <-ctxdone:
select {
case <-done:
default:
C.sqlite3_interrupt(db)
}
}
}(s.c.db)
}
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{id: int64(rowid), changes: int64(changes)}, nil
}

37
driver/statement_go18.go Normal file
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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
// +build go1.8
package sqlite3
import (
"context"
"database/sql/driver"
)
var (
_ driver.StmtExecContext = (*SQLiteStmt)(nil)
_ driver.StmtQueryContext = (*SQLiteStmt)(nil)
)
// QueryContext implement QueryerContext.
func (s *SQLiteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return s.query(ctx, list)
}
// ExecContext implement ExecerContext.
func (s *SQLiteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
list := make([]namedValue, len(args))
for i, nv := range args {
list[i] = namedValue(nv)
}
return s.exec(ctx, list)
}

60
driver/transaction.go Normal file
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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
*/
import "C"
import (
"context"
"database/sql/driver"
)
var (
_ driver.Tx = (*SQLiteTx)(nil)
)
// SQLiteTx implemen sql.Tx.
type SQLiteTx struct {
c *SQLiteConn
}
// Begin transaction.
func (c *SQLiteConn) Begin() (driver.Tx, error) {
return c.begin(context.Background())
}
func (c *SQLiteConn) begin(ctx context.Context) (driver.Tx, error) {
if _, err := c.exec(ctx, c.txlock, nil); err != nil {
return nil, err
}
return &SQLiteTx{c}, nil
}
// Commit transaction.
func (tx *SQLiteTx) Commit() error {
_, err := tx.c.exec(context.Background(), "COMMIT", nil)
if err != nil && err.(Error).Code == C.SQLITE_BUSY {
// sqlite3 will leave the transaction open in this scenario.
// However, database/sql considers the transaction complete once we
// return from Commit() - we must clean up to honour its semantics.
tx.c.exec(context.Background(), "ROLLBACK", nil)
}
return err
}
// Rollback transaction.
func (tx *SQLiteTx) Rollback() error {
_, err := tx.c.exec(context.Background(), "ROLLBACK", nil)
return err
}

45
driver/util.go Normal file
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// Copyright (C) 2018 The Go-SQLite3 Authors.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build cgo
package sqlite3
/*
#ifndef USE_LIBSQLITE3
#include <sqlite3-binding.h>
#else
#include <sqlite3.h>
#endif
#include <stdlib.h>
#include <string.h>
*/
import "C"
// SQLiteTimestampFormats is timestamp formats understood by both this module
// and SQLite. The first format in the slice will be used when saving time
// values into the database. When parsing a string from a timestamp or datetime
// column, the formats are tried in order.
var SQLiteTimestampFormats = []string{
// By default, store timestamps with whatever timezone they come with.
// When parsed, they will be returned with the same timezone.
"2006-01-02 15:04:05.999999999-07:00",
"2006-01-02T15:04:05.999999999-07:00",
"2006-01-02 15:04:05.999999999",
"2006-01-02T15:04:05.999999999",
"2006-01-02 15:04:05",
"2006-01-02T15:04:05",
"2006-01-02 15:04",
"2006-01-02T15:04",
"2006-01-02",
}
// Version returns SQLite library version information.
func Version() (libVersion string, libVersionNumber int, sourceID string) {
libVersion = C.GoString(C.sqlite3_libversion())
libVersionNumber = int(C.sqlite3_libversion_number())
sourceID = C.GoString(C.sqlite3_sourceid())
return libVersion, libVersionNumber, sourceID
}