forked from sqlancer/sqlancer
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathMySQLHintGenerator.java
More file actions
204 lines (187 loc) · 6.2 KB
/
MySQLHintGenerator.java
File metadata and controls
204 lines (187 loc) · 6.2 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
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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
package sqlancer.mysql.gen;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import sqlancer.IgnoreMeException;
import sqlancer.Randomly;
import sqlancer.mysql.MySQLSchema.MySQLIndex;
import sqlancer.mysql.MySQLSchema.MySQLTable;
import sqlancer.mysql.ast.MySQLSelect;
import sqlancer.mysql.ast.MySQLText;
public class MySQLHintGenerator {
private final MySQLSelect select;
private final List<MySQLTable> tables;
private final StringBuilder sb = new StringBuilder();
enum OptimizeHint {
BKA, NO_BKA, BNL, NO_BNL, DERIVED_CONDITION_PUSHDOWN, NO_DERIVED_CONDITION_PUSHDOWN, GROUP_INDEX,
NO_GROUP_INDEX, HASH_JOIN, NO_HASH_JOIN, INDEX, NO_INDEX, INDEX_MERGE, NO_INDEX_MERGE, JOIN_FIXED_ORDER,
JOIN_INDEX, NO_JOIN_INDEX, JOIN_ORDER, JOIN_PREFIX, JOIN_SUFFIX, MERGE, NO_MERGE, MRR, NO_MRR, NO_ICP,
NO_RANGE_OPTIMIZATION, ORDER_INDEX, NO_ORDER_INDEX, SEMIJOIN, NO_SEMIJOIN, SKIP_SCAN, NO_SKIP_SCAN
}
public MySQLHintGenerator(MySQLSelect select, List<MySQLTable> tables) {
this.select = select;
this.tables = tables;
}
public static void generateHints(MySQLSelect select, List<MySQLTable> tables) {
new MySQLHintGenerator(select, tables).randomHint();
}
public static List<MySQLText> generateAllHints(MySQLSelect select, List<MySQLTable> tables) {
MySQLHintGenerator generator = new MySQLHintGenerator(select, tables);
return generator.allHints();
}
private void randomHint() {
OptimizeHint chosenhint = Randomly.fromOptions(OptimizeHint.values());
generate(chosenhint);
}
private List<MySQLText> allHints() {
List<MySQLText> results = new ArrayList<>();
for (OptimizeHint hint : OptimizeHint.values()) {
try {
MySQLText generatedHint = generate(hint);
results.add(generatedHint);
} catch (IgnoreMeException e) {
continue;
}
}
return results;
}
private MySQLText generate(OptimizeHint chosenhint) {
sb.setLength(0);
switch (chosenhint) {
case BKA:
tablesHint("BKA");
break;
case NO_BKA:
tablesHint("NO_BKA");
break;
case BNL:
tablesHint("BNL");
break;
case NO_BNL:
tablesHint("NO_BNL");
break;
case DERIVED_CONDITION_PUSHDOWN:
tablesHint("DERIVED_CONDITION_PUSHDOWN");
break;
case NO_DERIVED_CONDITION_PUSHDOWN:
tablesHint("NO_DERIVED_CONDITION_PUSHDOWN");
break;
case GROUP_INDEX:
indexesHint("GROUP_INDEX");
break;
case NO_GROUP_INDEX:
indexesHint("NO_GROUP_INDEX");
break;
case HASH_JOIN:
tablesHint("HASH_JOIN");
break;
case NO_HASH_JOIN:
tablesHint("NO_HASH_JOIN");
break;
case INDEX:
indexesHint("INDEX");
break;
case NO_INDEX:
indexesHint("NO_INDEX");
break;
case INDEX_MERGE:
indexesHint("INDEX_MERGE");
break;
case NO_INDEX_MERGE:
indexesHint("NO_INDEX_MERGE");
break;
case JOIN_FIXED_ORDER:
tablesHint("JOIN_FIXED_ORDER");
break;
case JOIN_INDEX:
indexesHint("JOIN_INDEX");
break;
case NO_JOIN_INDEX:
indexesHint("NO_JOIN_INDEX");
break;
case JOIN_ORDER:
tablesHint("JOIN_ORDER");
break;
case JOIN_PREFIX:
tablesHint("JOIN_PREFIX");
break;
case JOIN_SUFFIX:
tablesHint("JOIN_SUFFIX");
break;
case MERGE:
tablesHint("MERGE");
break;
case NO_MERGE:
tablesHint("NO_MERGE");
break;
case MRR:
indexesHint("MRR");
break;
case NO_MRR:
indexesHint("NO_MRR");
break;
case NO_ICP:
indexesHint("NO_ICP");
break;
case NO_RANGE_OPTIMIZATION:
indexesHint("NO_RANGE_OPTIMIZATION");
break;
case ORDER_INDEX:
indexesHint("ORDER_INDEX");
break;
case NO_ORDER_INDEX:
indexesHint("NO_ORDER_INDEX");
break;
case SEMIJOIN:
semiHint("SEMIJOIN");
break;
case NO_SEMIJOIN:
semiHint("NO_SEMIJOIN");
break;
case SKIP_SCAN:
indexesHint("SKIP_SCAN");
break;
case NO_SKIP_SCAN:
indexesHint("NO_SKIP_SCAN");
break;
default:
throw new AssertionError();
}
MySQLText hint = new MySQLText(sb.toString());
select.setHint(hint);
return hint;
}
private void indexesHint(String string) {
sb.append(string);
sb.append("(");
MySQLTable table = Randomly.fromList(tables);
List<MySQLIndex> allIndexes = table.getIndexes();
sb.append(table.getName());
sb.append(", ");
if (allIndexes.isEmpty()) {
sb.append("PRIMARY");
} else {
List<MySQLIndex> indexSubset = Randomly.nonEmptySubset(allIndexes);
sb.append(indexSubset.stream().map(i -> i.getIndexName()).distinct().collect(Collectors.joining(", ")));
}
sb.append(")");
}
private void tablesHint(String string) {
sb.append(string);
sb.append("(");
appendTables();
sb.append(")");
}
private void semiHint(String string) {
sb.append(string);
sb.append("(");
String[] options = { "DUPSWEEDOUT", "FIRSTMATCH", "LOOSESCAN", "MATERIALIZATION" };
List<String> chosenOptions = Randomly.nonEmptySubset(options);
sb.append(chosenOptions.stream().collect(Collectors.joining(", ")));
sb.append(")");
}
private void appendTables() {
List<MySQLTable> tableSubset = Randomly.nonEmptySubset(tables);
sb.append(tableSubset.stream().map(t -> t.getName()).collect(Collectors.joining(", ")));
}
}