forked from cockroachdb/cockroach
/
set.go
67 lines (57 loc) · 1.87 KB
/
set.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
// Copyright 2015 The Cockroach Authors.
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License. See the AUTHORS file
// for names of contributors.
//
// Author: Peter Mattis (peter@cockroachlabs.com)
// This code was derived from https://github.com/youtube/vitess.
//
// Copyright 2012, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file
package parser
import "fmt"
// Set represents a SET statement.
type Set struct {
Name *QualifiedName
Values Exprs
}
func (node *Set) String() string {
if node.Values == nil {
return fmt.Sprintf("SET %s = DEFAULT", node.Name)
}
return fmt.Sprintf("SET %s = %v", node.Name, node.Values)
}
// SetTransaction represents a SET TRANSACTION statement.
type SetTransaction struct {
Isolation IsolationLevel
}
func (node *SetTransaction) String() string {
return fmt.Sprintf("SET TRANSACTION ISOLATION LEVEL %s", node.Isolation)
}
// SetTimeZone represents a SET TIME ZONE statement.
type SetTimeZone struct {
Value Expr
}
func (node *SetTimeZone) String() string {
prefix := "SET TIME ZONE"
switch v := node.Value.(type) {
case DInterval:
return fmt.Sprintf("%s INTERVAL '%s'", prefix, v)
case DString:
if zone := string(v); zone == "DEFAULT" || zone == "LOCAL" {
return fmt.Sprintf("%s %s", prefix, zone)
}
}
return fmt.Sprintf("%s %s", prefix, node.Value)
}