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
|
package schema
import (
"database/sql"
"encoding/hex"
"strconv"
"time"
"unicode/utf8"
"github.com/uptrace/bun/dialect"
"github.com/uptrace/bun/dialect/feature"
"github.com/uptrace/bun/internal/parser"
)
type Dialect interface {
Init(db *sql.DB)
Name() dialect.Name
Features() feature.Feature
Tables() *Tables
OnTable(table *Table)
IdentQuote() byte
AppendUint32(b []byte, n uint32) []byte
AppendUint64(b []byte, n uint64) []byte
AppendTime(b []byte, tm time.Time) []byte
AppendString(b []byte, s string) []byte
AppendBytes(b []byte, bs []byte) []byte
AppendJSON(b, jsonb []byte) []byte
AppendBool(b []byte, v bool) []byte
}
//------------------------------------------------------------------------------
type BaseDialect struct{}
func (BaseDialect) AppendUint32(b []byte, n uint32) []byte {
return strconv.AppendUint(b, uint64(n), 10)
}
func (BaseDialect) AppendUint64(b []byte, n uint64) []byte {
return strconv.AppendUint(b, n, 10)
}
func (BaseDialect) AppendTime(b []byte, tm time.Time) []byte {
b = append(b, '\'')
b = tm.UTC().AppendFormat(b, "2006-01-02 15:04:05.999999-07:00")
b = append(b, '\'')
return b
}
func (BaseDialect) AppendString(b []byte, s string) []byte {
b = append(b, '\'')
for _, r := range s {
if r == '\000' {
continue
}
if r == '\'' {
b = append(b, '\'', '\'')
continue
}
if r < utf8.RuneSelf {
b = append(b, byte(r))
continue
}
l := len(b)
if cap(b)-l < utf8.UTFMax {
b = append(b, make([]byte, utf8.UTFMax)...)
}
n := utf8.EncodeRune(b[l:l+utf8.UTFMax], r)
b = b[:l+n]
}
b = append(b, '\'')
return b
}
func (BaseDialect) AppendBytes(b, bs []byte) []byte {
if bs == nil {
return dialect.AppendNull(b)
}
b = append(b, `'\x`...)
s := len(b)
b = append(b, make([]byte, hex.EncodedLen(len(bs)))...)
hex.Encode(b[s:], bs)
b = append(b, '\'')
return b
}
func (BaseDialect) AppendJSON(b, jsonb []byte) []byte {
b = append(b, '\'')
p := parser.New(jsonb)
for p.Valid() {
c := p.Read()
switch c {
case '"':
b = append(b, '"')
case '\'':
b = append(b, "''"...)
case '\000':
continue
case '\\':
if p.SkipBytes([]byte("u0000")) {
b = append(b, `\\u0000`...)
} else {
b = append(b, '\\')
if p.Valid() {
b = append(b, p.Read())
}
}
default:
b = append(b, c)
}
}
b = append(b, '\'')
return b
}
func (BaseDialect) AppendBool(b []byte, v bool) []byte {
return dialect.AppendBool(b, v)
}
//------------------------------------------------------------------------------
type nopDialect struct {
BaseDialect
tables *Tables
features feature.Feature
}
func newNopDialect() *nopDialect {
d := new(nopDialect)
d.tables = NewTables(d)
d.features = feature.Returning
return d
}
func (d *nopDialect) Init(*sql.DB) {}
func (d *nopDialect) Name() dialect.Name {
return dialect.Invalid
}
func (d *nopDialect) Features() feature.Feature {
return d.features
}
func (d *nopDialect) Tables() *Tables {
return d.tables
}
func (d *nopDialect) OnField(field *Field) {}
func (d *nopDialect) OnTable(table *Table) {}
func (d *nopDialect) IdentQuote() byte {
return '"'
}
|
