-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
revert_migration.go
124 lines (104 loc) · 3.65 KB
/
revert_migration.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
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
/*
Copyright 2021 The Vitess 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.
*/
package engine
import (
"context"
"fmt"
"vitess.io/vitess/go/sqltypes"
"vitess.io/vitess/go/vt/key"
querypb "vitess.io/vitess/go/vt/proto/query"
vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc"
"vitess.io/vitess/go/vt/schema"
"vitess.io/vitess/go/vt/sqlparser"
"vitess.io/vitess/go/vt/vterrors"
"vitess.io/vitess/go/vt/vtgate/vindexes"
)
var _ Primitive = (*RevertMigration)(nil)
// RevertMigration represents the instructions to perform an online schema change via vtctld
type RevertMigration struct {
Keyspace *vindexes.Keyspace
Stmt *sqlparser.RevertMigration
Query string
TargetDestination key.Destination
noTxNeeded
noInputs
}
func (v *RevertMigration) description() PrimitiveDescription {
return PrimitiveDescription{
OperatorType: "RevertMigration",
Keyspace: v.Keyspace,
Other: map[string]any{
"query": v.Query,
},
}
}
// RouteType implements the Primitive interface
func (v *RevertMigration) RouteType() string {
return "RevertMigration"
}
// GetKeyspaceName implements the Primitive interface
func (v *RevertMigration) GetKeyspaceName() string {
return v.Keyspace.Name
}
// GetTableName implements the Primitive interface
func (v *RevertMigration) GetTableName() string {
return ""
}
// TryExecute implements the Primitive interface
func (v *RevertMigration) TryExecute(ctx context.Context, vcursor VCursor, bindVars map[string]*querypb.BindVariable, wantfields bool) (result *sqltypes.Result, err error) {
result = &sqltypes.Result{
Fields: []*querypb.Field{
{
Name: "uuid",
Type: sqltypes.VarChar,
},
},
Rows: [][]sqltypes.Value{},
}
sql := fmt.Sprintf("revert %s", v.Stmt.UUID)
ddlStrategySetting, err := schema.ParseDDLStrategy(vcursor.Session().GetDDLStrategy())
if err != nil {
return nil, err
}
ddlStrategySetting.Strategy = schema.DDLStrategyOnline // and we keep the options as they were
onlineDDL, err := schema.NewOnlineDDL(v.GetKeyspaceName(), "", sql, ddlStrategySetting, fmt.Sprintf("vtgate:%s", vcursor.Session().GetSessionUUID()), "")
if err != nil {
return result, err
}
s := Send{
Keyspace: v.Keyspace,
TargetDestination: v.TargetDestination,
Query: onlineDDL.SQL,
IsDML: false,
SingleShardOnly: false,
}
if _, err := vcursor.ExecutePrimitive(ctx, &s, bindVars, wantfields); err != nil {
return result, err
}
result.Rows = append(result.Rows, []sqltypes.Value{
sqltypes.NewVarChar(onlineDDL.UUID),
})
return result, err
}
// TryStreamExecute implements the Primitive interface
func (v *RevertMigration) TryStreamExecute(ctx context.Context, vcursor VCursor, bindVars map[string]*querypb.BindVariable, wantfields bool, callback func(*sqltypes.Result) error) error {
results, err := v.TryExecute(ctx, vcursor, bindVars, wantfields)
if err != nil {
return err
}
return callback(results)
}
// GetFields implements the Primitive interface
func (v *RevertMigration) GetFields(ctx context.Context, vcursor VCursor, bindVars map[string]*querypb.BindVariable) (*sqltypes.Result, error) {
return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "[BUG] GetFields is not reachable")
}