-
Notifications
You must be signed in to change notification settings - Fork 17
/
sqlsmith.go
108 lines (92 loc) · 2.4 KB
/
sqlsmith.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
// Copyright 2019 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package sqlsmith
import (
"math/rand"
"time"
"github.com/pingcap/errors"
"github.com/pingcap/tidb/pkg/parser/ast"
"github.com/chaos-mesh/go-sqlsmith/stateflow"
"github.com/chaos-mesh/go-sqlsmith/types"
"github.com/chaos-mesh/go-sqlsmith/util"
)
// SQLSmith defines SQLSmith struct
type SQLSmith struct {
depth int
maxDepth int
Rand *rand.Rand
Databases map[string]*types.Database
subTableIndex int
Node ast.Node
currDB string
debug bool
stable bool
hint bool
}
// New create SQLSmith instance
func New() *SQLSmith {
return new()
}
func new() *SQLSmith {
return &SQLSmith{
Rand: rand.New(rand.NewSource(time.Now().UnixNano())),
Databases: make(map[string]*types.Database),
}
}
// Debug turn on debug mode
func (s *SQLSmith) Debug() {
s.debug = true
}
// SetDB set current database
func (s *SQLSmith) SetDB(db string) {
s.currDB = db
}
// GetCurrDBName returns current selected dbname
func (s *SQLSmith) GetCurrDBName() string {
return s.currDB
}
// GetDB get current database without nil
func (s *SQLSmith) GetDB(db string) *types.Database {
if db, ok := s.Databases[db]; ok {
return db
}
return &types.Database{
Name: db,
}
}
// Stable set generated SQLs no rand
func (s *SQLSmith) Stable() {
s.stable = true
}
// SetStable set stable to given value
func (s *SQLSmith) SetStable(stable bool) {
s.stable = stable
}
// Hint ...
func (s *SQLSmith) Hint() bool {
return s.hint
}
// SetHint ...
func (s *SQLSmith) SetHint(hint bool) {
s.hint = hint
}
// Walk will walk the tree and fillin tables and columns data
func (s *SQLSmith) Walk(tree ast.Node) (string, string, error) {
node, table, err := stateflow.New(s.GetDB(s.currDB), s.stable).WalkTree(tree)
if err != nil {
return "", "", errors.Trace(err)
}
s.debugPrintf("node AST %+v\n", node)
sql, err := util.BufferOut(node)
return sql, table, errors.Trace(err)
}