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PrestoJoin.java
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120 lines (99 loc) · 4.26 KB
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package sqlancer.presto.ast;
import java.util.ArrayList;
import java.util.List;
import sqlancer.Randomly;
import sqlancer.common.ast.newast.Join;
import sqlancer.presto.PrestoGlobalState;
import sqlancer.presto.PrestoSchema;
import sqlancer.presto.PrestoSchema.PrestoColumn;
import sqlancer.presto.PrestoSchema.PrestoTable;
import sqlancer.presto.gen.PrestoTypedExpressionGenerator;
public class PrestoJoin implements PrestoExpression, Join<PrestoExpression, PrestoTable, PrestoColumn> {
private final PrestoTableReference leftTable;
private final PrestoTableReference rightTable;
private final JoinType joinType;
private PrestoExpression onCondition;
private OuterType outerType;
public PrestoJoin(PrestoTableReference leftTable, PrestoTableReference rightTable, JoinType joinType,
PrestoExpression whereCondition) {
this.leftTable = leftTable;
this.rightTable = rightTable;
this.joinType = joinType;
this.onCondition = whereCondition;
}
public static List<PrestoJoin> getJoins(List<PrestoTableReference> tableList, PrestoGlobalState globalState) {
List<PrestoJoin> joinExpressions = new ArrayList<>();
while (tableList.size() >= 2 && Randomly.getBooleanWithRatherLowProbability()) {
PrestoTableReference leftTable = tableList.remove(0);
PrestoTableReference rightTable = tableList.remove(0);
List<PrestoColumn> columns = new ArrayList<>(leftTable.getTable().getColumns());
columns.addAll(rightTable.getTable().getColumns());
PrestoTypedExpressionGenerator joinGen = new PrestoTypedExpressionGenerator(globalState)
.setColumns(columns);
switch (JoinType.getRandom()) {
case INNER:
joinExpressions.add(PrestoJoin.createInnerJoin(leftTable, rightTable, joinGen.generateExpression(
PrestoSchema.PrestoCompositeDataType.fromDataType(PrestoSchema.PrestoDataType.BOOLEAN))));
break;
case LEFT:
joinExpressions.add(PrestoJoin.createLeftOuterJoin(leftTable, rightTable, joinGen.generateExpression(
PrestoSchema.PrestoCompositeDataType.fromDataType(PrestoSchema.PrestoDataType.BOOLEAN))));
break;
case RIGHT:
joinExpressions.add(PrestoJoin.createRightOuterJoin(leftTable, rightTable, joinGen.generateExpression(
PrestoSchema.PrestoCompositeDataType.fromDataType(PrestoSchema.PrestoDataType.BOOLEAN))));
break;
default:
throw new AssertionError();
}
}
return joinExpressions;
}
public static PrestoJoin createRightOuterJoin(PrestoTableReference left, PrestoTableReference right,
PrestoExpression predicate) {
return new PrestoJoin(left, right, JoinType.RIGHT, predicate);
}
public static PrestoJoin createLeftOuterJoin(PrestoTableReference left, PrestoTableReference right,
PrestoExpression predicate) {
return new PrestoJoin(left, right, JoinType.LEFT, predicate);
}
public static PrestoJoin createInnerJoin(PrestoTableReference left, PrestoTableReference right,
PrestoExpression predicate) {
return new PrestoJoin(left, right, JoinType.INNER, predicate);
}
public PrestoTableReference getLeftTable() {
return leftTable;
}
public PrestoTableReference getRightTable() {
return rightTable;
}
public JoinType getJoinType() {
return joinType;
}
public PrestoExpression getOnCondition() {
return onCondition;
}
public OuterType getOuterType() {
return outerType;
}
@SuppressWarnings("unused")
private void setOuterType(OuterType outerType) {
this.outerType = outerType;
}
public enum JoinType {
INNER, LEFT, RIGHT;
public static JoinType getRandom() {
return Randomly.fromOptions(values());
}
}
public enum OuterType {
FULL, LEFT, RIGHT;
public static OuterType getRandom() {
return Randomly.fromOptions(values());
}
}
@Override
public void setOnClause(PrestoExpression onClause) {
onCondition = onClause;
}
}