| /* |
| * 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.apache.pig.builtin.mock.Storage.resetData; |
| import static org.apache.pig.builtin.mock.Storage.tuple; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.pig.ExecType; |
| import org.apache.pig.PigServer; |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.builtin.mock.Storage.Data; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.logicalLayer.FrontendException; |
| import org.junit.Before; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| public class TestSplit { |
| static private PigServer pig; |
| static private Data data; |
| |
| @BeforeClass |
| public static void setup() throws ExecException, IOException { |
| pig = new PigServer(ExecType.LOCAL); |
| } |
| |
| @Before |
| public void setUp() throws Exception { |
| data = resetData(pig); |
| data.set("input", |
| tuple(1), |
| tuple(2), |
| tuple(3), |
| tuple(4), |
| tuple((Integer)null), |
| tuple(5), |
| tuple(6) |
| ); |
| } |
| |
| @Test |
| public void testSplit1() throws IOException { |
| String query = |
| "a = load 'input' using mock.Storage() as (id:int);" + |
| "split a into b if id > 3, c if id < 3, d otherwise;" + |
| "d_sorted = order d by id;" + |
| "store d_sorted into 'output' using mock.Storage();" |
| ; |
| |
| Util.registerMultiLineQuery(pig, query); |
| List<Tuple> out = data.get("output"); |
| assertEquals(1, out.size()); |
| assertEquals(tuple(3), out.get(0)); |
| } |
| |
| @Test |
| public void testSplit2() throws IOException { |
| String query = |
| "a = load 'input' using mock.Storage() as (id:int);" + |
| "split a into b if id % 2 == 0, d otherwise;" + |
| "d_sorted = order d by id;" + |
| "store d_sorted into 'output' using mock.Storage();" |
| ; |
| |
| Util.registerMultiLineQuery(pig, query); |
| List<Tuple> out = data.get("output"); |
| assertEquals(3, out.size()); |
| assertEquals(tuple(1), out.get(0)); |
| assertEquals(tuple(3), out.get(1)); |
| assertEquals(tuple(5), out.get(2)); |
| } |
| |
| @Test |
| public void testOtherwiseAll() throws IOException { |
| String query = |
| "a = load 'input' using mock.Storage() as (id:int);" + |
| "split a into b if id % 2 == 0, d otherwise all;" + |
| "d_sorted = order d by id;" + |
| "store d_sorted into 'output' using mock.Storage();" |
| ; |
| Util.registerMultiLineQuery(pig, query); |
| List<Tuple> out = data.get("output"); |
| // Null should be passed through since the ALL keyword was specified in |
| // the otherwise branch |
| assertEquals(4, out.size()); |
| assertEquals(tuple((Integer)null), out.get(0)); |
| assertEquals(tuple(1), out.get(1)); |
| assertEquals(tuple(3), out.get(2)); |
| assertEquals(tuple(5), out.get(3)); |
| } |
| |
| @Test |
| public void testSplitMacro() throws IOException { |
| String query = |
| "define split_into_two (A,key) returns B, C {" + |
| " SPLIT $A INTO $B IF $key<4, $C OTHERWISE;" + |
| "};" + |
| "a = load 'input' using mock.Storage() as (id:int);" + |
| "b, c = split_into_two(a, id);" + |
| "b_sorted = order b by id;" + |
| "c_sorted = order c by id;" + |
| "store b_sorted into 'output1' using mock.Storage();" + |
| "store c_sorted into 'output2' using mock.Storage();" |
| ; |
| |
| Util.registerMultiLineQuery(pig, query); |
| List<Tuple> out = data.get("output1"); |
| assertEquals(3, out.size()); |
| assertEquals(tuple(1), out.get(0)); |
| assertEquals(tuple(2), out.get(1)); |
| assertEquals(tuple(3), out.get(2)); |
| |
| out = data.get("output2"); |
| assertEquals(3, out.size()); |
| assertEquals(tuple(4), out.get(0)); |
| assertEquals(tuple(5), out.get(1)); |
| assertEquals(tuple(6), out.get(2)); |
| } |
| |
| @Test(expected=FrontendException.class) |
| public void testSplitNondeterministic() throws IOException { |
| String query = |
| "a = load 'input' using mock.Storage() as (id:int);" + |
| "split a into b if RANDOM() < 0.5, d otherwise;" |
| ; |
| |
| try { |
| Util.registerMultiLineQuery(pig, query); |
| } catch (FrontendException fe) { |
| Util.checkMessageInException(fe, |
| "Can not use Otherwise in Split with an expression containing a @Nondeterministic UDF"); |
| throw fe; |
| } |
| |
| } |
| } |
| |