/**
* 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.BitSet;
import java.util.Iterator;
import java.util.List;
import org.apache.drill.common.logical.data.NamedExpression;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.config.StreamingAggregate;
import org.apache.drill.exec.planner.cost.DrillCostBase;
import org.apache.drill.exec.planner.cost.DrillCostBase.DrillCostFactory;
import org.apache.drill.exec.planner.logical.DrillParseContext;
import org.apache.drill.exec.planner.physical.visitor.PrelVisitor;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
import org.eigenbase.rel.AggregateCall;
import org.eigenbase.rel.AggregateRelBase;
import org.eigenbase.rel.InvalidRelException;
import org.eigenbase.rel.RelNode;
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 StreamAggPrel extends AggPrelBase implements Prel{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(StreamAggPrel.class);
public StreamAggPrel(RelOptCluster cluster, RelTraitSet traits, RelNode child, BitSet groupSet,
List<AggregateCall> aggCalls, OperatorPhase phase) throws InvalidRelException {
super(cluster, traits, child, groupSet, aggCalls, phase);
}
public AggregateRelBase copy(RelTraitSet traitSet, RelNode input, BitSet groupSet, List<AggregateCall> aggCalls) {
try {
return new StreamAggPrel(getCluster(), traitSet, input, getGroupSet(), aggCalls,
this.getOperatorPhase());
} catch (InvalidRelException e) {
throw new AssertionError(e);
}
}
@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 numGroupByFields = this.getGroupCount();
int numAggrFields = this.aggCalls.size();
double cpuCost = DrillCostBase.COMPARE_CPU_COST * numGroupByFields * inputRows;
// add cpu cost for computing the aggregate functions
cpuCost += DrillCostBase.FUNC_CPU_COST * numAggrFields * inputRows;
DrillCostFactory costFactory = (DrillCostFactory)planner.getCostFactory();
return costFactory.makeCost(inputRows, cpuCost, 0 /* disk i/o cost */, 0 /* network cost */);
}
@Override
public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) throws IOException {
Prel child = (Prel) this.getChild();
StreamingAggregate g = new StreamingAggregate(child.getPhysicalOperator(creator), keys.toArray(new NamedExpression[keys.size()]),
aggExprs.toArray(new NamedExpression[aggExprs.size()]), 1.0f);
return creator.addMetadata(this, g);
}
@Override
public Iterator<Prel> iterator() {
return PrelUtil.iter(getChild());
}
@Override
public <T, X, E extends Throwable> T accept(PrelVisitor<T, X, E> logicalVisitor, X value) throws E {
return logicalVisitor.visitPrel(this, value);
}
@Override
public SelectionVectorMode[] getSupportedEncodings() {
return SelectionVectorMode.ALL;
}
@Override
public SelectionVectorMode getEncoding() {
return SelectionVectorMode.NONE;
}
}