| /* |
| * 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.pig.backend.hadoop.executionengine.spark.optimizer; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhysicalPlan; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POGlobalRearrange; |
| import org.apache.pig.backend.hadoop.executionengine.util.SecondaryKeyOptimizerUtil; |
| |
| import java.util.List; |
| |
| public class SparkSecondaryKeyOptimizerUtil extends SecondaryKeyOptimizerUtil{ |
| private static Log log = LogFactory.getLog(SparkSecondaryKeyOptimizerUtil.class); |
| |
| @Override |
| protected PhysicalOperator getCurrentNode(PhysicalOperator root, PhysicalPlan reducePlan) { |
| PhysicalOperator currentNode = null; |
| |
| if (!(root instanceof POGlobalRearrange)) { |
| log.debug("Expected reduce root to be a POGlobalRearrange, skip secondary key optimizing"); |
| currentNode = null; |
| } else { |
| List<PhysicalOperator> globalRearrangeSuccs = reducePlan |
| .getSuccessors(root); |
| if (globalRearrangeSuccs.size() == 1) { |
| currentNode = globalRearrangeSuccs.get(0); |
| } else { |
| log.debug("Expected successor of a POGlobalRearrange is POPackage, skip secondary key optimizing"); |
| currentNode = null; |
| } |
| } |
| |
| return currentNode; |
| } |
| } |