-
Notifications
You must be signed in to change notification settings - Fork 397
Expand file tree
/
Copy pathDatabendToStringVisitor.java
More file actions
99 lines (90 loc) · 3.07 KB
/
DatabendToStringVisitor.java
File metadata and controls
99 lines (90 loc) · 3.07 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
package sqlancer.databend;
import sqlancer.common.ast.newast.NewToStringVisitor;
import sqlancer.databend.ast.DatabendConstant;
import sqlancer.databend.ast.DatabendExpression;
import sqlancer.databend.ast.DatabendJoin;
import sqlancer.databend.ast.DatabendSelect;
public class DatabendToStringVisitor extends NewToStringVisitor<DatabendExpression> {
@Override
public void visitSpecific(DatabendExpression expr) {
if (expr instanceof DatabendConstant) {
visit((DatabendConstant) expr);
} else if (expr instanceof DatabendSelect) {
visit((DatabendSelect) expr);
} else if (expr instanceof DatabendJoin) {
visit((DatabendJoin) expr);
} else {
throw new AssertionError(expr.getClass());
}
}
private void visit(DatabendJoin join) {
visit(join.getLeftTable());
sb.append(" ");
sb.append(join.getJoinType());
sb.append(" ");
if (join.getOuterType() != null) {
sb.append(join.getOuterType());
}
sb.append(" JOIN ");
visit(join.getRightTable());
if (join.getOnCondition() != null) {
sb.append(" ON ");
visit(join.getOnCondition());
}
}
private void visit(DatabendConstant constant) {
sb.append(constant.toString());
}
// private void visitFromList(List<Node<DatabendExpression>> fromList) {
// for (int i = 0; i < fromList.size(); i++) {
// if (i != 0) {
// sb.append(" INNER JOIN ");
// }
// visit(fromList.get(i));
// }
// }
private void visit(DatabendSelect select) {
sb.append("SELECT ");
if (select.isDistinct()) {
sb.append("DISTINCT ");
}
visit(select.getFetchColumns());
sb.append(" FROM ");
visit(select.getFromList());
if (!select.getFromList().isEmpty() && !select.getJoinList().isEmpty()) {
sb.append(", ");
}
if (!select.getJoinList().isEmpty()) {
visit(select.getJoinList());
}
if (select.getWhereClause() != null) {
sb.append(" WHERE ");
visit(select.getWhereClause());
}
if (!select.getGroupByExpressions().isEmpty()) {
sb.append(" GROUP BY ");
visit(select.getGroupByExpressions());
}
if (select.getHavingClause() != null) {
sb.append(" HAVING ");
visit(select.getHavingClause());
}
if (!select.getOrderByClauses().isEmpty()) {
sb.append(" ORDER BY ");
visit(select.getOrderByClauses());
}
if (select.getLimitClause() != null) {
sb.append(" LIMIT ");
visit(select.getLimitClause());
}
if (select.getOffsetClause() != null) {
sb.append(" OFFSET ");
visit(select.getOffsetClause());
}
}
public static String asString(DatabendExpression expr) {
DatabendToStringVisitor visitor = new DatabendToStringVisitor();
visitor.visit(expr);
return visitor.get();
}
}