| /* |
| * 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 java.io.File; |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.pig.ExecType; |
| import org.apache.pig.PigServer; |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.data.DataBag; |
| import org.apache.pig.data.Tuple; |
| import org.junit.AfterClass; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| |
| @RunWith(JUnit4.class) |
| public class TestNullConstant extends TestCase { |
| |
| static MiniCluster cluster = MiniCluster.buildCluster(); |
| private PigServer pigServer; |
| |
| @Before |
| @Override |
| public void setUp() throws Exception{ |
| pigServer = new PigServer(ExecType.MAPREDUCE, cluster.getProperties()); |
| } |
| |
| @AfterClass |
| public static void oneTimeTearDown() throws Exception { |
| cluster.shutDown(); |
| } |
| |
| @Test |
| public void testArithExpressions() throws IOException, ExecException { |
| String inputFileName = "testArithExpressions-input.txt"; |
| Util.createInputFile(cluster, inputFileName, |
| new String[] {"10\t11.0"}); |
| pigServer.registerQuery("a = load '" + inputFileName + "' as (x:int, y:double);"); |
| pigServer.registerQuery("b = foreach a generate x + null, x * null, x / null, x - null, null % x, " + |
| "y + null, y * null, y / null, y - null;"); |
| Iterator<Tuple> it = pigServer.openIterator("b"); |
| Tuple t = it.next(); |
| for (int i = 0; i < 9; i++) { |
| assertEquals(null, t.get(i)); |
| } |
| Util.deleteFile(cluster, inputFileName); |
| } |
| |
| @Test |
| public void testBinCond() throws IOException, ExecException { |
| String inputFileName = "testBinCond-input.txt"; |
| Util.createInputFile(cluster, inputFileName, |
| new String[] {"10\t11.0"}); |
| pigServer.registerQuery("a = load '" + inputFileName + "' as (x:int, y:double);"); |
| pigServer.registerQuery("b = foreach a generate (2 > 1? null : 1), ( 2 < 1 ? null : 1), (2 > 1 ? 1 : null), ( 2 < 1 ? 1 : null);"); |
| Iterator<Tuple> it = pigServer.openIterator("b"); |
| Tuple t = it.next(); |
| Object[] result = new Object[] { null, 1, 1, null}; |
| for (int i = 0; i < 4; i++) { |
| assertEquals(result[i], t.get(i)); |
| } |
| |
| // is null and is not null test |
| pigServer.registerQuery("b = foreach a generate (null is null ? 1 : 2), ( null is not null ? 2 : 1);"); |
| it = pigServer.openIterator("b"); |
| t = it.next(); |
| for (int i = 0; i < 2; i++) { |
| assertEquals(1, t.get(i)); |
| } |
| Util.deleteFile(cluster, inputFileName); |
| |
| } |
| |
| @Test |
| public void testForeachGenerate() throws ExecException, IOException { |
| String inputFileName = "testForeachGenerate-input.txt"; |
| Util.createInputFile(cluster, inputFileName, |
| new String[] {"10\t11.0"}); |
| pigServer.registerQuery("a = load '" + inputFileName + "' as (x:int, y:double);"); |
| pigServer.registerQuery("b = foreach a generate x, null, y, null;"); |
| Iterator<Tuple> it = pigServer.openIterator("b"); |
| Tuple t = it.next(); |
| Object[] result = new Object[] { 10, null, 11.0, null}; |
| for (int i = 0; i < 4; i++) { |
| assertEquals(result[i], t.get(i)); |
| } |
| Util.deleteFile(cluster, inputFileName); |
| |
| } |
| |
| @Test |
| public void testOuterJoin() throws IOException, ExecException { |
| String inputFileName1 = "testOuterJoin-input1.txt"; |
| Util.createInputFile(cluster, inputFileName1, |
| new String[] {"10\twill_join", "11\twill_not_join"}); |
| String inputFileName2 = "testOuterJoin-input2.txt"; |
| Util.createInputFile(cluster, inputFileName2, |
| new String[] {"10\twill_join", "12\twill_not_join"}); |
| pigServer.registerQuery("a = load '" + inputFileName1 + "' as (x:int, y:chararray);"); |
| pigServer.registerQuery("b = load '" + inputFileName2 + "' as (u:int, v:chararray);"); |
| pigServer.registerQuery("c = cogroup a by x, b by u;"); |
| pigServer.registerQuery("d = foreach c generate flatten((SIZE(a) == 0 ? null: a)), flatten((SIZE(b) == 0 ? null : b));"); |
| Iterator<Tuple> it = pigServer.openIterator("d"); |
| Object[][] results = new Object[][]{{10, "will_join", 10, "will_join"}, {11, "will_not_join", null}, {null, 12, "will_not_join"}}; |
| int i = 0; |
| while(it.hasNext()) { |
| |
| Tuple t = it.next(); |
| Object[] result = results[i++]; |
| assertEquals(result.length, t.size()); |
| for (int j = 0; j < result.length; j++) { |
| assertEquals(result[j], t.get(j)); |
| } |
| } |
| Util.deleteFile(cluster, inputFileName1); |
| Util.deleteFile(cluster, inputFileName2); |
| } |
| |
| @Test |
| public void testConcatAndSize() throws IOException, ExecException { |
| String inputFileName = "testConcatAndSize-input.txt"; |
| Util.createInputFile(cluster, inputFileName, |
| new String[] {"10\t11.0\tstring"}); |
| pigServer.registerQuery("a = load '" + inputFileName + "' as (x:int, y:double, str:chararray);"); |
| pigServer.registerQuery("b = foreach a generate SIZE(null), CONCAT(str, null), " + |
| "CONCAT(null, str);"); |
| Iterator<Tuple> it = pigServer.openIterator("b"); |
| Tuple t = it.next(); |
| for (int i = 0; i < 3; i++) { |
| assertEquals(null, t.get(i)); |
| } |
| Util.deleteFile(cluster, inputFileName); |
| } |
| |
| @Test |
| public void testExplicitCast() throws IOException, ExecException { |
| String inputFileName = "testExplicitCast-input.txt"; |
| Util.createInputFile(cluster, inputFileName, |
| new String[] {"10\t11.0\tstring"}); |
| pigServer.registerQuery("a = load '" + inputFileName + "' as (x:int, y:double, str:chararray);"); |
| pigServer.registerQuery("b = foreach a generate (int)null, (double)null, (chararray)null, (map[])null;"); |
| Iterator<Tuple> it = pigServer.openIterator("b"); |
| Tuple t = it.next(); |
| for (int i = 0; i < 3; i++) { |
| assertEquals(null, t.get(i)); |
| } |
| Util.deleteFile(cluster, inputFileName); |
| } |
| |
| @Test |
| public void testComplexNullConstants() throws IOException, ExecException { |
| String inputFileName = "testComplexNullConstants-input.txt"; |
| Util.createInputFile(cluster, inputFileName, |
| new String[] {"10\t11.0\tstring"}); |
| pigServer.registerQuery("a = load '" + inputFileName + "' as (x:int, y:double, str:chararray);"); |
| pigServer.registerQuery("b = foreach a generate {(null)}, ['2'#null];"); |
| Iterator<Tuple> it = pigServer.openIterator("b"); |
| Tuple t = it.next(); |
| assertEquals(null, ((DataBag)t.get(0)).iterator().next().get(0)); |
| assertEquals(null, ((Map<String, Object>)t.get(1)).get("2")); |
| Util.deleteFile(cluster, inputFileName); |
| } |
| |
| @Test |
| public void testMapNullKeyFailure() throws IOException { |
| String inputFileName = "testMapNullKeyFailure-input.txt"; |
| Util.createInputFile(cluster, inputFileName, |
| new String[] {"10\t11.0\tstring"}); |
| pigServer.registerQuery("a = load '" + inputFileName + "' as (x:int, y:double, str:chararray);"); |
| |
| boolean exceptionOccured = false; |
| try { |
| pigServer.registerQuery("b = foreach a generate [null#'2'];"); |
| } catch(Exception e) { |
| exceptionOccured = true; |
| } |
| Util.deleteFile(cluster, inputFileName); |
| if(!exceptionOccured) fail(); |
| } |
| } |