| /* |
| * 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.store.enumerable.plan; |
| |
| import org.apache.calcite.adapter.jdbc.JdbcRules; |
| 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.RelCollation; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.metadata.RelMetadataQuery; |
| import org.apache.calcite.rex.RexNode; |
| import org.apache.drill.exec.planner.cost.DrillCostBase; |
| |
| public class DrillJdbcSort extends JdbcRules.JdbcSort { |
| public DrillJdbcSort(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, RelCollation collation, RexNode offset, RexNode fetch) { |
| super(cluster, traitSet, input, collation, offset, fetch); |
| } |
| |
| @Override |
| public RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) { |
| if (collation.getFieldCollations().isEmpty()) { |
| // The case when sort node represents a regular limit without actual sort. |
| // Drill separates limit from sort, and they have different formulas for cost calculation. |
| // The cost for the case of the JDBC limit operator should correspond to the cost of the Drill's one. |
| double numRows = mq.getRowCount(this); |
| double cpuCost = DrillCostBase.COMPARE_CPU_COST * numRows; |
| DrillCostBase.DrillCostFactory costFactory = (DrillCostBase.DrillCostFactory) planner.getCostFactory(); |
| // adjust cost to handle the case when the original limit was split |
| return costFactory.makeCost(numRows, cpuCost, 0, 0).multiplyBy(0.1); |
| } |
| return super.computeSelfCost(planner, mq); |
| } |
| } |