| /* |
| * 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.test; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertNull; |
| |
| import java.util.Iterator; |
| |
| import org.apache.pig.PigConfiguration; |
| import org.apache.pig.PigServer; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.plans.MROperPlan; |
| 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.POPartialAgg; |
| import org.apache.pig.impl.PigContext; |
| import org.junit.Before; |
| import org.junit.Ignore; |
| import org.junit.Test; |
| |
| /** |
| * Test POPartialAgg runtime |
| */ |
| @Ignore |
| public class TestPOPartialAggPlan { |
| protected static PigContext pc; |
| protected static PigServer ps; |
| |
| @Before |
| public void setUp() throws Exception { |
| ps = new PigServer(Util.getLocalTestMode()); |
| pc = ps.getPigContext(); |
| pc.connect(); |
| } |
| |
| @Test |
| public void testNoMapAggProp() throws Exception{ |
| //test with pig.exec.mapPartAgg not set |
| String query = getGByQuery(); |
| |
| MROperPlan mrp = Util.buildMRPlan(query, pc); |
| assertEquals(mrp.size(), 1); |
| |
| assertNull("POPartialAgg should be absent",findPOPartialAgg(mrp)); |
| } |
| |
| @Test |
| public void testMapAggPropFalse() throws Exception{ |
| //test with pig.exec.mapPartAgg set to false |
| String query = getGByQuery(); |
| pc.getProperties().setProperty(PigConfiguration.PIG_EXEC_MAP_PARTAGG, "false"); |
| MROperPlan mrp = Util.buildMRPlan(query, pc); |
| assertEquals(mrp.size(), 1); |
| |
| assertNull("POPartialAgg should be absent", findPOPartialAgg(mrp)); |
| } |
| |
| @Test |
| public void testMapAggPropTrue() throws Exception{ |
| //test with pig.exec.mapPartAgg to true |
| String query = getGByQuery(); |
| pc.getProperties().setProperty(PigConfiguration.PIG_EXEC_MAP_PARTAGG, "true"); |
| MROperPlan mrp = Util.buildMRPlan(query, pc); |
| assertEquals(mrp.size(), 1); |
| |
| assertNotNull("POPartialAgg should be present",findPOPartialAgg(mrp)); |
| |
| } |
| |
| |
| private Object findPOPartialAgg(MROperPlan mrp) { |
| PhysicalPlan mapPlan = mrp.getRoots().get(0).mapPlan; |
| return findPOPartialAgg(mapPlan); |
| } |
| |
| protected String getGByQuery() { |
| return "l = load 'x' as (a,b,c);" + |
| "g = group l by a;" + |
| "f = foreach g generate group, COUNT(l.b);"; |
| } |
| |
| |
| @Test |
| public void testMapAggNoAggFunc() throws Exception{ |
| //no agg func, so there should not be a POPartial |
| String query = "l = load 'x' as (a,b,c);" + |
| "g = group l by a;" + |
| "f = foreach g generate group;"; |
| pc.getProperties().setProperty(PigConfiguration.PIG_EXEC_MAP_PARTAGG, "true"); |
| MROperPlan mrp = Util.buildMRPlan(query, pc); |
| assertEquals(mrp.size(), 1); |
| |
| assertNull("POPartialAgg should be absent",findPOPartialAgg(mrp)); |
| } |
| |
| @Test |
| public void testMapAggNotCombinable() throws Exception{ |
| //not combinable, so there should not be a POPartial |
| String query = "l = load 'x' as (a,b,c);" + |
| "g = group l by a;" + |
| "f = foreach g generate group, COUNT(l.b), l.b;"; |
| pc.getProperties().setProperty(PigConfiguration.PIG_EXEC_MAP_PARTAGG, "true"); |
| MROperPlan mrp = Util.buildMRPlan(query, pc); |
| assertEquals(mrp.size(), 1); |
| |
| assertNull("POPartialAgg should be absent", findPOPartialAgg(mrp)); |
| } |
| |
| protected PhysicalOperator findPOPartialAgg(PhysicalPlan plan) { |
| Iterator<PhysicalOperator> it = plan.iterator(); |
| while(it.hasNext()){ |
| PhysicalOperator op = it.next(); |
| if(op instanceof POPartialAgg){ |
| return op; |
| } |
| } |
| return null; |
| } |
| } |