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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.util.Iterator;
import junit.framework.Assert;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.logicalLayer.FrontendException;
import org.junit.AfterClass;
import org.junit.Test;
public class TestNestedForeach {
static MiniCluster cluster = MiniCluster.buildCluster();
private PigServer pig ;
public TestNestedForeach() throws Throwable {
pig = new PigServer(ExecType.MAPREDUCE, cluster.getProperties()) ;
}
Boolean[] nullFlags = new Boolean[]{ false, true };
@AfterClass
public static void oneTimeTearDown() throws Exception {
cluster.shutDown();
}
@Test
public void testNestedForeachProj() throws Exception {
String[] input = {
"1\t2",
"2\t7",
"1\t3"
};
Util.createInputFile(cluster, "table_nf_proj", input);
pig.registerQuery("a = load 'table_nf_proj' as (a0:int, a1:int);\n");
pig.registerQuery("b = group a by a0;\n");
pig.registerQuery("c = foreach b { c1 = foreach a generate a1; generate c1; }\n");
Iterator<Tuple> iter = pig.openIterator("c");
String[] expected = new String[] {"({(2),(3)})", "({(7)})"};
Util.checkQueryOutputsAfterSortRecursive(iter, expected, org.apache.pig.newplan.logical.Util.translateSchema(pig.dumpSchema("c")));
}
@Test
public void testNestedForeachExpression() throws Exception {
String[] input = {
"1\t2",
"2\t7",
"1\t3"
};
Util.createInputFile(cluster, "table_nf_expr", input);
pig.registerQuery("a = load 'table_nf_expr' as (a0:int, a1:int);\n");
pig.registerQuery("b = group a by a0;\n");
pig.registerQuery("c = foreach b { c1 = foreach a generate 2 * a1; generate c1; }\n");
Iterator<Tuple> iter = pig.openIterator("c");
String[] expected = new String[] {"({(4),(6)})", "({(14)})"};
Util.checkQueryOutputsAfterSortRecursive(iter, expected, org.apache.pig.newplan.logical.Util.translateSchema(pig.dumpSchema("c")));
}
@Test
public void testNestedForeachUDF() throws Exception {
String[] input = {
"1\thello",
"2\tpig",
"1\tworld"
};
Util.createInputFile(cluster, "table_nf_udf", input);
pig.registerQuery("a = load 'table_nf_udf' as (a0:int, a1:chararray);\n");
pig.registerQuery("b = group a by a0;\n");
pig.registerQuery("c = foreach b { c1 = foreach a generate UPPER(a1); generate c1; }\n");
Iterator<Tuple> iter = pig.openIterator("c");
String[] expected = new String[] {"({(HELLO),(WORLD)})", "({(PIG)})"};
Util.checkQueryOutputsAfterSortRecursive(iter, expected, org.apache.pig.newplan.logical.Util.translateSchema(pig.dumpSchema("c")));
}
@Test
public void testNestedForeachFlatten() throws Exception {
String[] input = {
"1\thello world pig",
"2\thadoop world",
"1\thello pig"
};
Util.createInputFile(cluster, "table_nf_flatten", input);
pig.registerQuery("a = load 'table_nf_flatten' as (a0:int, a1:chararray);\n");
pig.registerQuery("b = group a by a0;\n");
pig.registerQuery("c = foreach b { c1 = foreach a generate FLATTEN(TOKENIZE(a1)); generate c1; }\n");
Iterator<Tuple> iter = pig.openIterator("c");
String[] expected = new String[] {"({(hello),(world),(pig),(hello),(pig)})",
"({(hadoop),(world)})"};
Util.checkQueryOutputsAfterSortRecursive(iter, expected, org.apache.pig.newplan.logical.Util.translateSchema(pig.dumpSchema("c")));
}
@Test
public void testNestedForeachInnerFilter() throws Exception {
String[] input = {
"1\t2",
"2\t7",
"1\t3"
};
Util.createInputFile(cluster, "table_nf_filter", input);
pig.registerQuery("a = load 'table_nf_filter' as (a0:int, a1:int);\n");
pig.registerQuery("b = group a by a0;\n");
pig.registerQuery("c = foreach b { " +
" c1 = filter a by a1 >= 3; " +
" c2 = foreach c1 generate a1; " +
" generate c2; " +
" }\n");
Iterator<Tuple> iter = pig.openIterator("c");
Tuple t = iter.next();
Assert.assertTrue(t.toString().equals("({(3)})"));
t = iter.next();
Assert.assertTrue(t.toString().equals("({(7)})"));
}
@Test
public void testNestedForeachInnerOrder() throws Exception {
String[] input = {
"1\t3",
"2\t7",
"1\t2"
};
Util.createInputFile(cluster, "table_nf_order", input);
pig.registerQuery("a = load 'table_nf_order' as (a0:int, a1:int);\n");
pig.registerQuery("b = group a by a0;\n");
pig.registerQuery("c = foreach b { " +
" c1 = order a by a1; " +
" c2 = foreach c1 generate a1; " +
" generate c2; " +
" }\n");
Iterator<Tuple> iter = pig.openIterator("c");
Tuple t = iter.next();
Assert.assertTrue(t.toString().equals("({(2),(3)})"));
t = iter.next();
Assert.assertTrue(t.toString().equals("({(7)})"));
}
// See PIG-2563
@Test
public void testNestedForeach() throws Exception {
String[] input = {
"1\t2\t3",
"2\t5\t2"
};
Util.createInputFile(cluster, "table_nf_project", input);
pig.registerQuery("A = load 'table_nf_project' as (a,b,c:chararray);");
pig.registerQuery("B = GROUP A BY a;");
pig.registerQuery("C = foreach B {tmp = A.a;generate A, tmp; };");
pig.registerQuery("D = foreach C generate A.(a,b) as v;");
Iterator<Tuple> iter = pig.openIterator("D");
Tuple t = iter.next();
Assert.assertTrue(t.toString().equals("({(1,2)})"));
t = iter.next();
Assert.assertTrue(t.toString().equals("({(2,5)})"));
}
}