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DuckDBJoin.java
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125 lines (104 loc) · 4.36 KB
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package sqlancer.duckdb.ast;
import java.util.ArrayList;
import java.util.List;
import sqlancer.Randomly;
import sqlancer.common.ast.newast.Join;
import sqlancer.duckdb.DuckDBProvider.DuckDBGlobalState;
import sqlancer.duckdb.DuckDBSchema.DuckDBColumn;
import sqlancer.duckdb.DuckDBSchema.DuckDBTable;
import sqlancer.duckdb.gen.DuckDBExpressionGenerator;
public class DuckDBJoin implements DuckDBExpression, Join<DuckDBExpression, DuckDBTable, DuckDBColumn> {
private final DuckDBTableReference leftTable;
private final DuckDBTableReference rightTable;
private final JoinType joinType;
private DuckDBExpression onCondition;
private OuterType outerType;
public enum JoinType {
INNER, NATURAL, LEFT, RIGHT;
public static JoinType getRandom() {
return Randomly.fromOptions(values());
}
}
public enum OuterType {
FULL, LEFT, RIGHT;
public static OuterType getRandom() {
return Randomly.fromOptions(values());
}
}
public DuckDBJoin(DuckDBTableReference leftTable, DuckDBTableReference rightTable, JoinType joinType,
DuckDBExpression whereCondition) {
this.leftTable = leftTable;
this.rightTable = rightTable;
this.joinType = joinType;
this.onCondition = whereCondition;
}
public DuckDBTableReference getLeftTable() {
return leftTable;
}
public DuckDBTableReference getRightTable() {
return rightTable;
}
public JoinType getJoinType() {
return joinType;
}
public DuckDBExpression getOnCondition() {
return onCondition;
}
private void setOuterType(OuterType outerType) {
this.outerType = outerType;
}
public OuterType getOuterType() {
return outerType;
}
public static List<DuckDBJoin> getJoins(List<DuckDBTableReference> tableList, DuckDBGlobalState globalState) {
List<DuckDBJoin> joinExpressions = new ArrayList<>();
while (tableList.size() >= 2 && Randomly.getBooleanWithRatherLowProbability()) {
DuckDBTableReference leftTable = tableList.remove(0);
DuckDBTableReference rightTable = tableList.remove(0);
List<DuckDBColumn> columns = new ArrayList<>(leftTable.getTable().getColumns());
columns.addAll(rightTable.getTable().getColumns());
DuckDBExpressionGenerator joinGen = new DuckDBExpressionGenerator(globalState).setColumns(columns);
switch (DuckDBJoin.JoinType.getRandom()) {
case INNER:
joinExpressions.add(DuckDBJoin.createInnerJoin(leftTable, rightTable, joinGen.generateExpression()));
break;
case NATURAL:
joinExpressions.add(DuckDBJoin.createNaturalJoin(leftTable, rightTable, OuterType.getRandom()));
break;
case LEFT:
joinExpressions
.add(DuckDBJoin.createLeftOuterJoin(leftTable, rightTable, joinGen.generateExpression()));
break;
case RIGHT:
joinExpressions
.add(DuckDBJoin.createRightOuterJoin(leftTable, rightTable, joinGen.generateExpression()));
break;
default:
throw new AssertionError();
}
}
return joinExpressions;
}
public static DuckDBJoin createRightOuterJoin(DuckDBTableReference left, DuckDBTableReference right,
DuckDBExpression predicate) {
return new DuckDBJoin(left, right, JoinType.RIGHT, predicate);
}
public static DuckDBJoin createLeftOuterJoin(DuckDBTableReference left, DuckDBTableReference right,
DuckDBExpression predicate) {
return new DuckDBJoin(left, right, JoinType.LEFT, predicate);
}
public static DuckDBJoin createInnerJoin(DuckDBTableReference left, DuckDBTableReference right,
DuckDBExpression predicate) {
return new DuckDBJoin(left, right, JoinType.INNER, predicate);
}
public static DuckDBJoin createNaturalJoin(DuckDBTableReference left, DuckDBTableReference right,
OuterType naturalJoinType) {
DuckDBJoin join = new DuckDBJoin(left, right, JoinType.NATURAL, null);
join.setOuterType(naturalJoinType);
return join;
}
@Override
public void setOnClause(DuckDBExpression onClause) {
this.onCondition = onClause;
}
}