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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 java.io.IOException;
import java.util.List;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.config.UnionAll;
import org.apache.drill.exec.planner.cost.DrillCostBase;
import org.apache.drill.exec.planner.cost.DrillCostBase.DrillCostFactory;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
import org.eigenbase.rel.InvalidRelException;
import org.eigenbase.rel.RelNode;
import org.eigenbase.rel.UnionRelBase;
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;
import com.google.common.collect.Lists;
public class UnionDistinctPrel extends UnionPrel {
public UnionDistinctPrel(RelOptCluster cluster, RelTraitSet traits, List<RelNode> inputs) throws InvalidRelException {
super(cluster, traits, inputs, false /* all = false */);
}
@Override
public UnionRelBase copy(RelTraitSet traitSet, List<RelNode> inputs, boolean all) {
try {
return new UnionDistinctPrel(this.getCluster(), traitSet, inputs);
}catch (InvalidRelException e) {
throw new AssertionError(e);
}
}
@Override
public RelOptCost computeSelfCost(RelOptPlanner planner) {
if(PrelUtil.getSettings(getCluster()).useDefaultCosting()) {
return super.computeSelfCost(planner).multiplyBy(.1);
}
double totalInputRowCount = 0;
for (int i = 0; i < this.getInputs().size(); i++) {
totalInputRowCount += RelMetadataQuery.getRowCount(this.getInputs().get(i));
}
double cpuCost = totalInputRowCount * DrillCostBase.BASE_CPU_COST;
DrillCostFactory costFactory = (DrillCostFactory)planner.getCostFactory();
return costFactory.makeCost(totalInputRowCount, cpuCost, 0, 0);
}
@Override
public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) throws IOException {
List<PhysicalOperator> inputPops = Lists.newArrayList();
for (int i = 0; i < this.getInputs().size(); i++) {
inputPops.add( ((Prel)this.getInputs().get(i)).getPhysicalOperator(creator));
}
///TODO: change this to UnionDistinct once implemented end-to-end..
UnionAll unionAll = new UnionAll(inputPops.toArray(new PhysicalOperator[inputPops.size()]));
return creator.addMetadata(this, unionAll);
}
@Override
public SelectionVectorMode[] getSupportedEncodings() {
return SelectionVectorMode.DEFAULT;
}
@Override
public SelectionVectorMode getEncoding() {
return SelectionVectorMode.NONE;
}
}