| /* |
| * 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 org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelOptCost; |
| import org.apache.calcite.plan.RelOptPlanner; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.RelWriter; |
| import org.apache.calcite.rel.SingleRel; |
| import org.apache.calcite.rel.metadata.RelMetadataQuery; |
| import org.apache.drill.common.logical.data.LogicalOperator; |
| import org.apache.drill.common.logical.data.MetadataAggregate; |
| import org.apache.drill.exec.planner.cost.DrillCostBase; |
| import org.apache.drill.exec.metastore.analyze.MetadataAggregateContext; |
| |
| import java.util.List; |
| |
| public class MetadataAggRel extends SingleRel implements DrillRel { |
| |
| private final MetadataAggregateContext context; |
| |
| public MetadataAggRel(RelOptCluster cluster, RelTraitSet traits, RelNode input, |
| MetadataAggregateContext context) { |
| super(cluster, traits, input); |
| this.context = context; |
| } |
| |
| @Override |
| public RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) { |
| double dRows = mq.getRowCount(getInput()); |
| double dCpu = dRows * DrillCostBase.COMPARE_CPU_COST; |
| double dIo = 0; |
| return planner.getCostFactory().makeCost(dRows, dCpu, dIo); |
| } |
| |
| @Override |
| public RelNode copy(RelTraitSet traitSet, List<RelNode> inputs) { |
| return new MetadataAggRel(getCluster(), traitSet, sole(inputs), context); |
| } |
| |
| @Override |
| public LogicalOperator implement(DrillImplementor implementor) { |
| LogicalOperator inputOp = implementor.visitChild(this, 0, getInput()); |
| MetadataAggregate rel = new MetadataAggregate(); |
| rel.setInput(inputOp); |
| return rel; |
| } |
| |
| public MetadataAggregateContext getContext() { |
| return context; |
| } |
| |
| @Override |
| public RelWriter explainTerms(RelWriter pw) { |
| return super.explainTerms(pw).item("context: ", context); |
| } |
| } |