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
|
package bun
import (
"context"
"database/sql"
"github.com/uptrace/bun/internal"
"github.com/uptrace/bun/schema"
)
type DropTableQuery struct {
baseQuery
cascadeQuery
ifExists bool
}
var _ Query = (*DropTableQuery)(nil)
func NewDropTableQuery(db *DB) *DropTableQuery {
q := &DropTableQuery{
baseQuery: baseQuery{
db: db,
conn: db.DB,
},
}
return q
}
func (q *DropTableQuery) Conn(db IConn) *DropTableQuery {
q.setConn(db)
return q
}
func (q *DropTableQuery) Model(model interface{}) *DropTableQuery {
q.setModel(model)
return q
}
func (q *DropTableQuery) Err(err error) *DropTableQuery {
q.setErr(err)
return q
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) Table(tables ...string) *DropTableQuery {
for _, table := range tables {
q.addTable(schema.UnsafeIdent(table))
}
return q
}
func (q *DropTableQuery) TableExpr(query string, args ...interface{}) *DropTableQuery {
q.addTable(schema.SafeQuery(query, args))
return q
}
func (q *DropTableQuery) ModelTableExpr(query string, args ...interface{}) *DropTableQuery {
q.modelTableName = schema.SafeQuery(query, args)
return q
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) IfExists() *DropTableQuery {
q.ifExists = true
return q
}
func (q *DropTableQuery) Cascade() *DropTableQuery {
q.cascade = true
return q
}
func (q *DropTableQuery) Restrict() *DropTableQuery {
q.restrict = true
return q
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) Operation() string {
return "DROP TABLE"
}
func (q *DropTableQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
if q.err != nil {
return nil, q.err
}
b = append(b, "DROP TABLE "...)
if q.ifExists {
b = append(b, "IF EXISTS "...)
}
b, err = q.appendTables(fmter, b)
if err != nil {
return nil, err
}
b = q.appendCascade(fmter, b)
return b, nil
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
if q.table != nil {
if err := q.beforeDropTableHook(ctx); err != nil {
return nil, err
}
}
queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
if err != nil {
return nil, err
}
query := internal.String(queryBytes)
res, err := q.exec(ctx, q, query)
if err != nil {
return nil, err
}
if q.table != nil {
if err := q.afterDropTableHook(ctx); err != nil {
return nil, err
}
}
return res, nil
}
func (q *DropTableQuery) beforeDropTableHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(BeforeDropTableHook); ok {
if err := hook.BeforeDropTable(ctx, q); err != nil {
return err
}
}
return nil
}
func (q *DropTableQuery) afterDropTableHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(AfterDropTableHook); ok {
if err := hook.AfterDropTable(ctx, q); err != nil {
return err
}
}
return nil
}
|
