| /* |
| * 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 java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Random; |
| |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.POStatus; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.Result; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.PODistinct; |
| import org.apache.pig.data.BagFactory; |
| import org.apache.pig.data.DataBag; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| import org.apache.pig.impl.plan.OperatorKey; |
| import org.junit.Test; |
| |
| public class TestPODistinct { |
| DataBag input = BagFactory.getInstance().newDefaultBag(); |
| Random r = new Random(); |
| final int MAX_VALUE = 10; |
| final int MAX_SAMPLES = 100; |
| |
| @Test |
| public void testPODistictWithInt() throws ExecException { |
| |
| input = BagFactory.getInstance().newDefaultBag(); |
| TupleFactory tf = TupleFactory.getInstance(); |
| for (int i = 0; i < MAX_SAMPLES; i++) { |
| Tuple t = tf.newTuple(); |
| t.append(r.nextInt(MAX_VALUE)); |
| input.add(t); |
| // System.out.println(t); |
| } |
| |
| confirmDistinct(); |
| } |
| |
| @Test |
| public void testPODistictWithNullValues() throws ExecException { |
| |
| input = BagFactory.getInstance().newDefaultBag(); |
| TupleFactory tf = TupleFactory.getInstance(); |
| for (int i = 0; i < MAX_SAMPLES; i++) { |
| Tuple t = tf.newTuple(); |
| t.append(null); |
| input.add(t); |
| // System.out.println(t); |
| } |
| |
| confirmDistinct(); |
| } |
| |
| @Test |
| public void testPODistictWithIntAndNullValues() throws ExecException { |
| |
| input = BagFactory.getInstance().newDefaultBag(); |
| TupleFactory tf = TupleFactory.getInstance(); |
| for (int i = 0; i < MAX_SAMPLES; i++) { |
| Tuple t = tf.newTuple(); |
| t.append(r.nextInt(MAX_VALUE)); |
| input.add(t); |
| t = tf.newTuple(); |
| t.append(null); |
| input.add(t); |
| // System.out.println(t); |
| } |
| |
| confirmDistinct(); |
| } |
| |
| @Test |
| public void testPODistictWithIntNullValues() throws ExecException { |
| |
| input = BagFactory.getInstance().newDefaultBag(); |
| TupleFactory tf = TupleFactory.getInstance(); |
| for (int i = 0; i < MAX_SAMPLES; i++) { |
| Tuple t = tf.newTuple(); |
| t.append(r.nextInt(MAX_VALUE)); |
| t.append(null); |
| input.add(t); |
| // System.out.println(t); |
| } |
| |
| confirmDistinct(); |
| } |
| |
| @Test |
| public void testPODistictWithNullIntValues() throws ExecException { |
| |
| input = BagFactory.getInstance().newDefaultBag(); |
| TupleFactory tf = TupleFactory.getInstance(); |
| for (int i = 0; i < MAX_SAMPLES; i++) { |
| Tuple t = tf.newTuple(); |
| t.append(null); |
| t.append(r.nextInt(MAX_VALUE)); |
| input.add(t); |
| // System.out.println(t); |
| } |
| |
| confirmDistinct(); |
| } |
| |
| @Test |
| public void testPODistictArityWithNullValues() throws ExecException { |
| |
| input = BagFactory.getInstance().newDefaultBag(); |
| TupleFactory tf = TupleFactory.getInstance(); |
| for (int i = 0; i < MAX_SAMPLES; i++) { |
| Tuple t = tf.newTuple(); |
| if ( r.nextInt(MAX_VALUE) % 3 == 0 ){ |
| t.append(null); |
| } |
| t.append(r.nextInt(MAX_VALUE)); |
| t.append(r.nextInt(MAX_VALUE)); |
| input.add(t); |
| // System.out.println(t); |
| } |
| |
| confirmDistinct(); |
| } |
| |
| public void confirmDistinct() throws ExecException { |
| |
| PORead read = new PORead(new OperatorKey("", r.nextLong()), input); |
| List<PhysicalOperator> inputs = new LinkedList<PhysicalOperator>(); |
| inputs.add(read); |
| PODistinct distinct = new PODistinct(new OperatorKey("", r.nextLong()), |
| -1, inputs); |
| Map<Tuple, Integer> output = new HashMap<Tuple, Integer>(); |
| Tuple t = null; |
| Result res = distinct.getNextTuple(); |
| t = (Tuple) res.result; |
| while (res.returnStatus != POStatus.STATUS_EOP) { |
| if (output.containsKey(t)) { |
| int i = output.get(t); |
| output.put(t, ++i); |
| } else { |
| output.put(t, 1); |
| } |
| res = distinct.getNextTuple(); |
| t = (Tuple) res.result; |
| } |
| for (Map.Entry<Tuple, Integer> e : output.entrySet()) { |
| int i = e.getValue(); |
| // System.out.println(e.getKey()); |
| assertEquals(1, i); |
| } |
| } |
| |
| } |