Add binding to sqlite3_limit

limit.go

+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package sqlite
+
+/*
+#include <sqlite3.h>
+*/
+import "C"
+
+type Limit int32
+
+const (
+	LimitLength            Limit = C.SQLITE_LIMIT_LENGTH
+	LimitColumn            Limit = C.SQLITE_LIMIT_COLUMN
+	LimitExprDepth         Limit = C.SQLITE_LIMIT_EXPR_DEPTH
+	LimitCompoundSelect    Limit = C.SQLITE_LIMIT_COMPOUND_SELECT
+	LimitVdbeOp            Limit = C.SQLITE_LIMIT_VDBE_OP
+	LimitFunctionArg       Limit = C.SQLITE_LIMIT_FUNCTION_ARG
+	LimitAttached          Limit = C.SQLITE_LIMIT_ATTACHED
+	LimitLikePatternLength Limit = C.SQLITE_LIMIT_LIKE_PATTERN_LENGTH
+	LimitVariableNumber    Limit = C.SQLITE_LIMIT_VARIABLE_NUMBER
+	LimitTriggerLength     Limit = C.SQLITE_LIMIT_TRIGGER_DEPTH
+)
+
+// Limit queries the current value of a limit.
+// (See http://www.sqlite.org/c3ref/c_limit_attached.html)
+func (c *Conn) Limit(id Limit) int32 {
+	return int32(C.sqlite3_limit(c.db, C.int(id), -1))
+}
+
+// SetLimit changes the value of a limit.
+// (See http://www.sqlite.org/c3ref/c_limit_attached.html)
+func (c *Conn) SetLimit(id Limit, newVal int32) int32 {
+	return int32(C.sqlite3_limit(c.db, C.int(id), C.int(newVal)))
+}

limit_test.go

+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package sqlite_test
+
+import (
+	"testing"
+
+	"github.com/bmizerany/assert"
+	. "github.com/gwenn/gosqlite"
+)
+
+func TestLimit(t *testing.T) {
+	db := open(t)
+	defer checkClose(db, t)
+
+	limitVariableNumber := db.Limit(LimitVariableNumber)
+	assert.T(t, limitVariableNumber < 1000, "unexpected value for LimitVariableNumber")
+	oldLimitVariableNumber := db.SetLimit(LimitVariableNumber, 99)
+	assert.Equalf(t, limitVariableNumber, oldLimitVariableNumber, "unexpected value for LimitVariableNumber: %d <> %d", limitVariableNumber, oldLimitVariableNumber)
+	limitVariableNumber = db.Limit(LimitVariableNumber)
+	assert.Equalf(t, int32(99), limitVariableNumber, "unexpected value for LimitVariableNumber: %d <> %d", 99, limitVariableNumber)
+
+}