/
TestHiveUDTF.java
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/
TestHiveUDTF.java
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/*
* 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.impl.builtin;
import org.apache.commons.collections4.IteratorUtils;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.data.Tuple;
import org.apache.pig.test.MiniGenericCluster;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import java.io.IOException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import static org.apache.pig.builtin.mock.Storage.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class TestHiveUDTF {
private static PigServer pigServer = null;
private static MiniGenericCluster cluster = MiniGenericCluster.buildCluster();
@BeforeClass
public static void oneTimeSetup() throws ExecException {
pigServer = new PigServer(ExecType.LOCAL);
}
@AfterClass
public static void oneTimeTearDown() throws Exception {
cluster.shutDown();
}
@Test
public void testHiveUDTFOnBagInput() throws IOException {
Data data = resetData(pigServer);
Tuple tuple = tuple(bag(tuple("a"), tuple("b"), tuple("c")));
data.set("TestHiveUDTF", tuple);
pigServer.registerQuery("define posexplode HiveUDTF('posexplode');");
pigServer.registerQuery("A = load 'TestHiveUDTF' USING mock.Storage() as (a0:{(b0:chararray)});");
pigServer.registerQuery("B = foreach A generate posexplode(a0);");
Iterator<Tuple> result = pigServer.openIterator("B");
List<Tuple> out = IteratorUtils.toList(result);
assertEquals(2, out.size());
assertTrue("Result doesn't contain the HiveUDTF output",
out.contains(tuple(bag(tuple(0, "a"), tuple(1, "b"), tuple(2, "c")))));
assertTrue("Result doesn't contain an empty bag",
out.contains(tuple(bag())));
}
@Test
public void testHiveUDTFOnBagInputWithTwoProjection() throws IOException {
Data data = resetData(pigServer);
Tuple tuple = tuple(bag(tuple("a"), tuple("b"), tuple("c")));
data.set("TestHiveUDTF", tuple);
pigServer.registerQuery("define posexplode HiveUDTF('posexplode');");
pigServer.registerQuery("A = load 'TestHiveUDTF' USING mock.Storage() as (a0:{(b0:chararray)});");
pigServer.registerQuery("B = foreach A generate a0, posexplode(a0);");
Iterator<Tuple> result = pigServer.openIterator("B");
List<Tuple> out = IteratorUtils.toList(result);
assertEquals(2, out.size());
assertTrue("Result doesn't contain the HiveUDTF output",
out.contains(tuple(bag(tuple("a"), tuple("b"), tuple("c")), bag(tuple(0, "a"), tuple(1, "b"), tuple(2, "c")))));
assertTrue("Result doesn't contain an empty bag",
out.contains(tuple(null, bag())));
}
@Test
public void testHiveUDTFOnClose() throws IOException {
Data data = resetData(pigServer);
List<Tuple> tuples = Arrays.asList(tuple("a", 1), tuple("a", 2), tuple("a", 3));
data.set("TestHiveUDTF", tuples);
pigServer.registerQuery("define COUNT2 HiveUDTF('org.apache.hadoop.hive.contrib.udtf.example.GenericUDTFCount2');");
pigServer.registerQuery("a = load 'TestHiveUDTF' USING mock.Storage() as (name:chararray, id:int);");
pigServer.registerQuery("b = foreach a generate flatten(COUNT2(name));");
Iterator<Tuple> result = pigServer.openIterator("b");
List<Tuple> out = IteratorUtils.toList(result);
assertEquals(2, out.size());
assertEquals(tuple(3), out.get(0));
assertEquals(tuple(3), out.get(1));
}
}