/**
* 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.physical;
import org.apache.drill.exec.planner.logical.DrillJoinRel;
import org.apache.drill.exec.planner.logical.RelOptHelper;
import org.eigenbase.rel.InvalidRelException;
import org.eigenbase.rel.RelNode;
import org.eigenbase.relopt.RelOptRule;
import org.eigenbase.relopt.RelOptRuleCall;
import org.eigenbase.trace.EigenbaseTrace;
import java.util.logging.Logger;
public class HashJoinPrule extends JoinPruleBase {
public static final RelOptRule INSTANCE = new HashJoinPrule();
protected static final Logger tracer = EigenbaseTrace.getPlannerTracer();
private HashJoinPrule() {
super(
RelOptHelper.any(DrillJoinRel.class), "Prel.HashJoinPrule");
}
@Override
public boolean matches(RelOptRuleCall call) {
PlannerSettings settings = PrelUtil.getPlannerSettings(call.getPlanner());
return settings.isMemoryEstimationEnabled() || settings.isHashJoinEnabled();
}
@Override
public void onMatch(RelOptRuleCall call) {
if (!PrelUtil.getPlannerSettings(call.getPlanner()).isHashJoinEnabled()) return;
final DrillJoinRel join = (DrillJoinRel) call.rel(0);
final RelNode left = join.getLeft();
final RelNode right = join.getRight();
if (!checkPreconditions(join, left, right)) {
return;
}
boolean hashSingleKey = PrelUtil.getPlannerSettings(call.getPlanner()).isHashSingleKey();
try {
createDistBothPlan(call, join, PhysicalJoinType.HASH_JOIN, left, right, null /* left collation */, null /* right collation */, hashSingleKey);
if (checkBroadcastConditions(call.getPlanner(), join, left, right)) {
createBroadcastPlan(call, join, PhysicalJoinType.HASH_JOIN, left, right, null /* left collation */, null /* right collation */);
// createBroadcastPlan1(call, join, PhysicalJoinType.HASH_JOIN, left, right, null, null);
}
} catch (InvalidRelException e) {
tracer.warning(e.toString());
}
}
}