| /* |
| * 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.logical; |
| |
| import java.util.List; |
| |
| import org.apache.calcite.linq4j.Ord; |
| |
| import org.apache.calcite.rel.core.Union; |
| import org.apache.calcite.rel.metadata.RelMetadataQuery; |
| import org.apache.drill.common.logical.data.LogicalOperator; |
| import org.apache.drill.exec.planner.common.DrillSetOpRel; |
| import org.apache.drill.exec.planner.torel.ConversionContext; |
| import org.apache.calcite.rel.InvalidRelException; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelOptCost; |
| import org.apache.calcite.plan.RelOptPlanner; |
| import org.apache.calcite.plan.RelTraitSet; |
| |
| /** |
| * Union implemented in Drill. |
| */ |
| public class DrillUnionRel extends Union implements DrillRel, DrillSetOpRel { |
| /** Creates a DrillUnionRel. */ |
| public DrillUnionRel(RelOptCluster cluster, RelTraitSet traits, |
| List<RelNode> inputs, boolean all, boolean checkCompatibility) throws InvalidRelException { |
| super(cluster, traits, inputs, all); |
| if (checkCompatibility && !this.isCompatible(getRowType(), getInputs())) { |
| throw new InvalidRelException("Input row types of the Union are not compatible."); |
| } |
| } |
| |
| @Override |
| public DrillUnionRel copy(RelTraitSet traitSet, List<RelNode> inputs, |
| boolean all) { |
| try { |
| return new DrillUnionRel(getCluster(), traitSet, inputs, all, |
| false /* don't check compatibility during copy */); |
| } catch (InvalidRelException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| @Override |
| public RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) { |
| // divide cost by two to ensure cheaper than EnumerableDrillRel |
| return super.computeSelfCost(planner, mq).multiplyBy(.5); |
| } |
| |
| @Override |
| public LogicalOperator implement(DrillImplementor implementor) { |
| org.apache.drill.common.logical.data.Union.Builder builder = org.apache.drill.common.logical.data.Union.builder(); |
| for (Ord<RelNode> input : Ord.zip(inputs)) { |
| builder.addInput(implementor.visitChild(this, input.i, input.e)); |
| } |
| builder.setDistinct(!all); |
| return builder.build(); |
| } |
| |
| public static DrillUnionRel convert(org.apache.drill.common.logical.data.Union union, ConversionContext context) throws InvalidRelException{ |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean isDistinct() { |
| return !this.all; |
| } |
| } |