GV

GeezerVison

The World Wide Web, restored to 800 pixels of glory.

Home|About|Gaming cabinet|Archives|How it works|Starter sites

On this site

  • Sign in
  • ActionsCI/CD and automation
  • CodespacesCloud development environments
  • All Features
  • Documentation
  • Training
  • Certifications
  • Build with Copilot
  • Customize Copilot
  • Integrations
  • Trending repos
  • GitHub Sponsors
  • Developer articles
  • Enterprises

This view

  • Original page
  • New address

GeezerVison is showing github.com — sqlparser/parsed_query.go at master · supercxx/sqlparser

Expand file tree

/

parsed_query.go

Copy path
More file actions
More file actions

Latest commit

 

History

History
History
180 lines (166 loc) · 3.93 KB
/

parsed_query.go

Copy path

File metadata and controls

180 lines (166 loc) · 3.93 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
// 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 sqlparser
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"github.com/xwb1989/sqlparser/dependency/sqltypes"
)
type bindLocation struct {
offset, length int
}
type ParsedQuery struct {
Query string
bindLocations []bindLocation
}
type EncoderFunc func(value interface{}) ([]byte, error)
func (pq *ParsedQuery) GenerateQuery(bindVariables map[string]interface{}) ([]byte, error) {
if len(pq.bindLocations) == 0 {
return []byte(pq.Query), nil
}
buf := bytes.NewBuffer(make([]byte, 0, len(pq.Query)))
current := 0
for _, loc := range pq.bindLocations {
buf.WriteString(pq.Query[current:loc.offset])
name := pq.Query[loc.offset : loc.offset+loc.length]
supplied, _, err := FetchBindVar(name, bindVariables)
if err != nil {
return nil, err
}
if err := EncodeValue(buf, supplied); err != nil {
return nil, err
}
current = loc.offset + loc.length
}
buf.WriteString(pq.Query[current:])
return buf.Bytes(), nil
}
func (pq *ParsedQuery) MarshalJSON() ([]byte, error) {
return json.Marshal(pq.Query)
}
func EncodeValue(buf *bytes.Buffer, value interface{}) error {
switch bindVal := value.(type) {
case nil:
buf.WriteString("null")
case []sqltypes.Value:
for i := 0; i < len(bindVal); i++ {
if i != 0 {
buf.WriteString(", ")
}
if err := EncodeValue(buf, bindVal[i]); err != nil {
return err
}
}
case [][]sqltypes.Value:
for i := 0; i < len(bindVal); i++ {
if i != 0 {
buf.WriteString(", ")
}
buf.WriteByte('(')
if err := EncodeValue(buf, bindVal[i]); err != nil {
return err
}
buf.WriteByte(')')
}
case []interface{}:
buf.WriteByte('(')
for i, v := range bindVal {
if i != 0 {
buf.WriteString(", ")
}
if err := EncodeValue(buf, v); err != nil {
return err
}
}
buf.WriteByte(')')
case TupleEqualityList:
if err := bindVal.Encode(buf); err != nil {
return err
}
default:
v, err := sqltypes.BuildValue(bindVal)
if err != nil {
return err
}
v.EncodeSql(buf)
}
return nil
}
type TupleEqualityList struct {
Columns []string
Rows [][]sqltypes.Value
}
func (tpl *TupleEqualityList) Encode(buf *bytes.Buffer) error {
if len(tpl.Rows) == 0 {
return errors.New("cannot encode with 0 rows")
}
if len(tpl.Columns) == 1 {
return tpl.encodeAsIN(buf)
}
return tpl.encodeAsEquality(buf)
}
func (tpl *TupleEqualityList) encodeAsIN(buf *bytes.Buffer) error {
buf.WriteString(tpl.Columns[0])
buf.WriteString(" in (")
for i, r := range tpl.Rows {
if len(r) != 1 {
return errors.New("values don't match column count")
}
if i != 0 {
buf.WriteString(", ")
}
if err := EncodeValue(buf, r); err != nil {
return err
}
}
buf.WriteByte(')')
return nil
}
func (tpl *TupleEqualityList) encodeAsEquality(buf *bytes.Buffer) error {
for i, r := range tpl.Rows {
if i != 0 {
buf.WriteString(" or ")
}
buf.WriteString("(")
for j, c := range tpl.Columns {
if j != 0 {
buf.WriteString(" and ")
}
buf.WriteString(c)
buf.WriteString(" = ")
if err := EncodeValue(buf, r[j]); err != nil {
return err
}
}
buf.WriteByte(')')
}
return nil
}
func FetchBindVar(name string, bindVariables map[string]interface{}) (val interface{}, isList bool, err error) {
name = name[1:]
if name[0] == ':' {
name = name[1:]
isList = true
}
supplied, ok := bindVariables[name]
if !ok {
return nil, false, fmt.Errorf("missing bind var %s", name)
}
list, gotList := supplied.([]interface{})
if isList {
if !gotList {
return nil, false, fmt.Errorf("unexpected list arg type %T for key %s", supplied, name)
}
if len(list) == 0 {
return nil, false, fmt.Errorf("empty list supplied for %s", name)
}
return list, true, nil
}
if gotList {
return nil, false, fmt.Errorf("unexpected arg type %T for key %s", supplied, name)
}
return supplied, false, nil
}
You are visitor 01402520 — GeezerVison does not store the pages you look up.
Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.