34 lines
1.1 KiB
Go
34 lines
1.1 KiB
Go
|
// Copyright 2015 PingCAP, Inc.
|
||
|
//
|
||
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
// you may not use this file except in compliance with the License.
|
||
|
// You may obtain a copy of the License at
|
||
|
//
|
||
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
//
|
||
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
// See the License for the specific language governing permissions and
|
||
|
// limitations under the License.
|
||
|
|
||
|
// Package forupdate record information for "select ... for update" statement
|
||
|
package forupdate
|
||
|
|
||
|
import "github.com/pingcap/tidb/context"
|
||
|
|
||
|
// A dummy type to avoid naming collision in context.
|
||
|
type forupdateKeyType int
|
||
|
|
||
|
// String defines a Stringer function for debugging and pretty printing.
|
||
|
func (k forupdateKeyType) String() string {
|
||
|
return "for update"
|
||
|
}
|
||
|
|
||
|
// ForUpdateKey is used to retrive "select for update" statement information
|
||
|
const ForUpdateKey forupdateKeyType = 0
|
||
|
|
||
|
// SetForUpdate set "select for update" flag.
|
||
|
func SetForUpdate(ctx context.Context) {
|
||
|
ctx.SetValue(ForUpdateKey, true)
|
||
|
}
|