-
Notifications
You must be signed in to change notification settings - Fork 92
/
analyze_table.go
175 lines (145 loc) · 4.25 KB
/
analyze_table.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
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
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 dal
import (
"context"
"strings"
)
import (
"github.com/pkg/errors"
)
import (
"github.com/arana-db/arana/pkg/dataset"
"github.com/arana-db/arana/pkg/mysql/rows"
"github.com/arana-db/arana/pkg/proto"
"github.com/arana-db/arana/pkg/proto/rule"
"github.com/arana-db/arana/pkg/resultx"
"github.com/arana-db/arana/pkg/runtime/ast"
"github.com/arana-db/arana/pkg/runtime/plan"
)
type AnalyzeTablePlan struct {
plan.BasePlan
Stmt *ast.AnalyzeTableStatement
Shards rule.DatabaseTables
ShardsByName map[string]rule.DatabaseTables
}
func NewAnalyzeTablePlan(
stmt *ast.AnalyzeTableStatement,
shards rule.DatabaseTables,
shardsByName map[string]rule.DatabaseTables,
) *AnalyzeTablePlan {
return &AnalyzeTablePlan{
Stmt: stmt,
Shards: shards,
ShardsByName: shardsByName,
}
}
// Type get plan type
func (a *AnalyzeTablePlan) Type() proto.PlanType {
return proto.PlanTypeQuery
}
func (a *AnalyzeTablePlan) ExecIn(ctx context.Context, conn proto.VConn) (proto.Result, error) {
var (
sb strings.Builder
args []int
)
ctx, span := plan.Tracer.Start(ctx, "AnalyzeTable.ExecIn")
defer span.End()
// currently, only implemented db0
db, tb := a.Shards.Smallest()
if db == "" {
return nil, errors.New("no found db")
}
// deal partition table
a.tableReplace(tb)
if err := a.Stmt.Restore(ast.RestoreDefault, &sb, &args); err != nil {
return nil, errors.Wrap(err, "failed to execute ANALYZE TABLE statement")
}
ret, err := conn.Query(ctx, db, sb.String(), a.ToArgs(args)...)
if err != nil {
return nil, err
}
ds, err := ret.Dataset()
if err != nil {
return nil, errors.WithStack(err)
}
fields, err := ds.Fields()
if err != nil {
return nil, errors.WithStack(err)
}
ds = dataset.Pipe(ds, dataset.Map(nil, func(next proto.Row) (proto.Row, error) {
dest := make([]proto.Value, len(fields))
if next.Scan(dest) != nil {
return next, nil
}
// format physical database name to logic database name
if strings.Contains(dest[0].String(), ".") {
dbTable := strings.Split(dest[0].String(), ".")
dbName := dbTable[0]
dbNameIndex := strings.LastIndex(dbTable[0], "_")
if dbNameIndex > 0 {
dbName = dbName[:dbNameIndex]
}
tbName := dbTable[1]
tbNameIndex := strings.LastIndex(dbTable[1], "_")
if tbNameIndex > 0 {
tbName = tbName[:tbNameIndex]
}
dest[0] = proto.NewValueString(dbName + "." + tbName)
}
// msg text transfer to string
//if v, ok := dest[len(dest)-1].([]byte); ok {
// dest[len(dest)-1] = string(v)
//}
return rows.NewTextVirtualRow(fields, dest), nil
}))
return resultx.New(resultx.WithDataset(ds)), nil
}
// tableReplace tb physical table name
func (a *AnalyzeTablePlan) tableReplace(tb string) {
if tb == "" {
return
}
// logical to physical table map
tableMap := a.physicalToLogicTable(tb)
logicTb := tableMap[tb]
stmt := ast.NewAnalyzeTableStatement()
for _, table := range a.Stmt.Tables {
if strings.Trim(table.String(), "`") == logicTb {
stmt.Tables = append(stmt.Tables, &ast.TableName{tb})
} else {
stmt.Tables = append(stmt.Tables, table)
}
}
a.Stmt = stmt
}
// physicalToLogicTable logical to physical table map
func (a *AnalyzeTablePlan) physicalToLogicTable(tbName string) map[string]string {
res := make(map[string]string)
L1:
for logicTableName, shards := range a.ShardsByName {
for _, tbs := range shards {
for _, tb := range tbs {
if tb == tbName {
res[tb] = logicTableName
continue L1
}
}
}
}
return res
}