/*******************************************************************************
* 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 java.io.IOException;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.config.BroadcastExchange;
import org.apache.drill.exec.physical.config.SelectionVectorRemover;
import org.apache.drill.exec.planner.cost.DrillCostBase;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
import org.eigenbase.rel.RelNode;
import org.eigenbase.rel.SingleRel;
import org.eigenbase.rel.metadata.RelMetadataQuery;
import org.eigenbase.relopt.RelOptCluster;
import org.eigenbase.relopt.RelOptCost;
import org.eigenbase.relopt.RelOptPlanner;
import org.eigenbase.relopt.RelTraitSet;
public class BroadcastExchangePrel extends ExchangePrel{
public BroadcastExchangePrel(RelOptCluster cluster, RelTraitSet traitSet, RelNode input) {
super(cluster, traitSet, input);
assert input.getConvention() == Prel.DRILL_PHYSICAL;
}
/**
* In a BroadcastExchange, each sender is sending data to N receivers (for costing
* purposes we assume it is also sending to itself).
*/
@Override
public RelOptCost computeSelfCost(RelOptPlanner planner) {
if(PrelUtil.getSettings(getCluster()).useDefaultCosting()) {
return super.computeSelfCost(planner).multiplyBy(.1);
}
RelNode child = this.getChild();
double inputRows = RelMetadataQuery.getRowCount(child);
int rowWidth = child.getRowType().getFieldCount() * DrillCostBase.AVG_FIELD_WIDTH;
double cpuCost = DrillCostBase.SVR_CPU_COST * inputRows ;
int numEndPoints = PrelUtil.getSettings(getCluster()).numEndPoints();
double networkCost = DrillCostBase.BYTE_NETWORK_COST * inputRows * rowWidth * numEndPoints;
return new DrillCostBase(inputRows, cpuCost, 0, networkCost);
}
@Override
public SelectionVectorMode getEncoding() {
return SelectionVectorMode.NONE;
}
@Override
public SelectionVectorMode[] getSupportedEncodings() {
return SelectionVectorMode.DEFAULT;
}
@Override
public RelNode copy(RelTraitSet traitSet, List<RelNode> inputs) {
return new BroadcastExchangePrel(getCluster(), traitSet, sole(inputs));
}
public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) throws IOException {
Prel child = (Prel) this.getChild();
PhysicalOperator childPOP = child.getPhysicalOperator(creator);
//Currently, only accepts "NONE". For other, requires SelectionVectorRemover
if (!childPOP.getSVMode().equals(SelectionVectorMode.NONE)) {
childPOP = new SelectionVectorRemover(childPOP);
}
BroadcastExchange g = new BroadcastExchange(childPOP);
return creator.addMetadata(this, g);
}
}