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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.physical;
import org.apache.drill.exec.planner.logical.DrillJoin;
import org.apache.drill.exec.planner.logical.DrillJoinRel;
import org.apache.drill.exec.planner.logical.DrillSemiJoinRel;
import org.apache.drill.exec.planner.logical.RelOptHelper;
import org.apache.calcite.rel.InvalidRelException;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.plan.RelOptRule;
import org.apache.calcite.plan.RelOptRuleCall;
import org.apache.calcite.plan.RelOptRuleOperand;
import org.apache.calcite.util.trace.CalciteTrace;
import org.slf4j.Logger;
public class HashJoinPrule extends JoinPruleBase {
public static final RelOptRule DIST_INSTANCE = new HashJoinPrule("Prel.HashJoinDistPrule", RelOptHelper.any(DrillJoinRel.class), true);
public static final RelOptRule BROADCAST_INSTANCE = new HashJoinPrule("Prel.HashJoinBroadcastPrule", RelOptHelper.any(DrillJoinRel.class), false);
public static final RelOptRule SEMI_DIST_INSTANCE = new HashJoinPrule("Prel.HashSemiJoinDistPrule", RelOptHelper.any(DrillSemiJoinRel.class), true);
public static final RelOptRule SEMI_BROADCAST_INSTANCE = new HashJoinPrule("Prel.HashSemiJoinBroadcastPrule", RelOptHelper.any(DrillSemiJoinRel.class), false);
protected static final Logger tracer = CalciteTrace.getPlannerTracer();
private final boolean isDist;
private boolean isSemi = false;
private HashJoinPrule(String name, RelOptRuleOperand operand, boolean isDist) {
super(operand, name);
this.isDist = isDist;
}
@Override
public boolean matches(RelOptRuleCall call) {
PlannerSettings settings = PrelUtil.getPlannerSettings(call.getPlanner());
isSemi = call.rel(0) instanceof DrillSemiJoinRel;
return settings.isMemoryEstimationEnabled() || settings.isHashJoinEnabled();
}
@Override
public void onMatch(RelOptRuleCall call) {
PlannerSettings settings = PrelUtil.getPlannerSettings(call.getPlanner());
if (!settings.isHashJoinEnabled() || isSemi && !settings.isSemiJoinEnabled()) {
return;
}
final DrillJoin join = call.rel(0);
final RelNode left = join.getLeft();
final RelNode right = join.getRight();
if (!checkPreconditions(join, left, right, settings)) {
return;
}
boolean hashSingleKey = PrelUtil.getPlannerSettings(call.getPlanner()).isHashSingleKey();
try {
if(isDist){
createDistBothPlan(call, join, PhysicalJoinType.HASH_JOIN,
left, right, null /* left collation */, null /* right collation */, hashSingleKey, isSemi);
}else{
if (checkBroadcastConditions(call.getPlanner(), join, left, right)) {
createBroadcastPlan(call, join, join.getCondition(), PhysicalJoinType.HASH_JOIN,
left, right, null /* left collation */, null /* right collation */, isSemi);
}
}
} catch (InvalidRelException e) {
tracer.warn(e.toString());
}
}
}
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