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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.drill.exec.planner.logical;
import java.util.List;
import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.rel.InvalidRelException;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.core.JoinRelType;
import org.apache.calcite.rel.type.RelDataType;
import org.apache.calcite.rex.RexChecker;
import org.apache.calcite.rex.RexNode;
import org.apache.calcite.sql.type.SqlTypeName;
import org.apache.calcite.sql.validate.SqlValidatorUtil;
import org.apache.calcite.util.Litmus;
import org.apache.calcite.util.Pair;
import org.apache.drill.common.logical.data.Join;
import org.apache.drill.common.logical.data.LogicalOperator;
import org.apache.drill.exec.planner.torel.ConversionContext;
import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableList;
public class RowKeyJoinRel extends DrillJoinRel implements DrillRel {
/* Whether this join represents a semi-join. This is done to skip creating another logical join
* RowKeySemiJoinRel
*/
boolean isSemiJoin;
public RowKeyJoinRel(RelOptCluster cluster, RelTraitSet traits, RelNode left, RelNode right, RexNode condition,
JoinRelType joinType) {
super(cluster, traits, left, right, condition, joinType);
}
public RowKeyJoinRel(RelOptCluster cluster, RelTraitSet traits, RelNode left, RelNode right, RexNode condition,
JoinRelType joinType, boolean isSemiJoin) {
super(cluster, traits, left, right, condition, joinType);
this.isSemiJoin = isSemiJoin;
}
public RowKeyJoinRel(RelOptCluster cluster, RelTraitSet traits, RelNode left, RelNode right, RexNode condition,
JoinRelType joinType, int joinControl) {
super(cluster, traits, left, right, condition, joinType, joinControl);
}
public RowKeyJoinRel(RelOptCluster cluster, RelTraitSet traits, RelNode left, RelNode right, RexNode condition,
JoinRelType joinType, List<Integer> leftKeys, List<Integer> rightKeys) throws InvalidRelException {
super(cluster, traits, left, right, condition, joinType, leftKeys, rightKeys);
}
@Override
public RowKeyJoinRel copy(RelTraitSet traitSet, RexNode condition, RelNode left, RelNode right, JoinRelType joinType,
boolean semiJoinDone) {
return new RowKeyJoinRel(getCluster(), traitSet, left, right, condition, joinType, isSemiJoin());
}
@Override
public LogicalOperator implement(DrillImplementor implementor) {
return super.implement(implementor);
}
/**
* Returns whether this RowKeyJoin represents a {@link org.apache.calcite.rel.core.SemiJoin}
* @return true if join represents a {@link org.apache.calcite.rel.core.SemiJoin}, false otherwise.
*/
public boolean isSemiJoin() {
return isSemiJoin;
}
@Override
public RelDataType deriveRowType() {
return SqlValidatorUtil.deriveJoinRowType(
left.getRowType(),
isSemiJoin() ? null : right.getRowType(),
JoinRelType.INNER,
getCluster().getTypeFactory(),
null,
ImmutableList.of());
}
public static RowKeyJoinRel convert(Join join, ConversionContext context) throws InvalidRelException {
Pair<RelNode, RelNode> inputs = getJoinInputs(join, context);
RexNode rexCondition = getJoinCondition(join, context);
RowKeyJoinRel joinRel = new RowKeyJoinRel(context.getCluster(), context.getLogicalTraits(),
inputs.left, inputs.right, rexCondition, join.getJoinType());
return joinRel;
}
/** The parent method relies the class being an instance of {@link org.apache.calcite.rel.core.SemiJoin}
* in deciding row-type validity. We override this method to account for the RowKeyJoinRel logical rel
* representing both regular and semi-joins */
@Override public boolean isValid(Litmus litmus, Context context) {
if (getRowType().getFieldCount()
!= getSystemFieldList().size()
+ left.getRowType().getFieldCount()
+ ((this.isSemiJoin()) ? 0 : right.getRowType().getFieldCount())) {
return litmus.fail("field count mismatch");
}
if (condition != null) {
if (condition.getType().getSqlTypeName() != SqlTypeName.BOOLEAN) {
return litmus.fail("condition must be boolean: {}",
condition.getType());
}
// The input to the condition is a row type consisting of system
// fields, left fields, and right fields. Very similar to the
// output row type, except that fields have not yet been made due
// due to outer joins.
RexChecker checker =
new RexChecker(
getCluster().getTypeFactory().builder()
.addAll(getSystemFieldList())
.addAll(getLeft().getRowType().getFieldList())
.addAll(getRight().getRowType().getFieldList())
.build(),
context, litmus);
condition.accept(checker);
if (checker.getFailureCount() > 0) {
return litmus.fail(checker.getFailureCount()
+ " failures in condition " + condition);
}
}
return litmus.succeed();
}
}
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