qb_mysql.go
3.37 KB
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
// Copyright 2014 beego Author. All Rights Reserved.
//
// 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.
package orm
import (
"fmt"
"strconv"
"strings"
)
type MySQLQueryBuilder struct {
QueryTokens []string
}
func (qb *MySQLQueryBuilder) Select(fields ...string) QueryBuilder {
segment := fmt.Sprintf("SELECT %s", strings.Join(fields, ", "))
qb.QueryTokens = append(qb.QueryTokens, segment)
return qb
}
func (qb *MySQLQueryBuilder) From(tables ...string) QueryBuilder {
segment := fmt.Sprintf("FROM %s", strings.Join(tables, ", "))
qb.QueryTokens = append(qb.QueryTokens, segment)
return qb
}
func (qb *MySQLQueryBuilder) InnerJoin(table string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "INNER JOIN "+table)
return qb
}
func (qb *MySQLQueryBuilder) LeftJoin(table string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "LEFT JOIN "+table)
return qb
}
func (qb *MySQLQueryBuilder) RightJoin(table string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "RIGHT JOIN "+table)
return qb
}
func (qb *MySQLQueryBuilder) On(cond string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "ON "+cond)
return qb
}
func (qb *MySQLQueryBuilder) Where(cond string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "WHERE "+cond)
return qb
}
func (qb *MySQLQueryBuilder) And(cond string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "AND "+cond)
return qb
}
func (qb *MySQLQueryBuilder) Or(cond string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "OR "+cond)
return qb
}
func (qb *MySQLQueryBuilder) In(vals ...string) QueryBuilder {
segment := fmt.Sprintf("IN (%s)", strings.Join(vals, ", "))
qb.QueryTokens = append(qb.QueryTokens, segment)
return qb
}
func (qb *MySQLQueryBuilder) OrderBy(fields ...string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "ORDER BY "+strings.Join(fields, ", "))
return qb
}
func (qb *MySQLQueryBuilder) Asc() QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "ASC")
return qb
}
func (qb *MySQLQueryBuilder) Desc() QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "DESC")
return qb
}
func (qb *MySQLQueryBuilder) Limit(limit int) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "LIMIT "+strconv.Itoa(limit))
return qb
}
func (qb *MySQLQueryBuilder) Offset(offset int) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "OFFSET "+strconv.Itoa(offset))
return qb
}
func (qb *MySQLQueryBuilder) GroupBy(fields ...string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "GROUP BY "+strings.Join(fields, ", "))
return qb
}
func (qb *MySQLQueryBuilder) Having(cond string) QueryBuilder {
qb.QueryTokens = append(qb.QueryTokens, "HAVING "+cond)
return qb
}
func (qb *MySQLQueryBuilder) Subquery(sub string, alias string) string {
return fmt.Sprintf("(%s) AS %s", sub, alias)
}
func (qb *MySQLQueryBuilder) String() string {
return strings.Join(qb.QueryTokens, " ")
}