/*
* 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.FileOutputStream;
import java.io.PrintStream;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
import junit.framework.TestCase;
import junit.framework.Assert;
import org.junit.Test;
import org.apache.pig.PigServer;
import org.apache.pig.test.utils.TestHelper;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.data.DataType;
import org.apache.pig.data.Tuple;
public class TestOrderBy2 extends TestCase {
private String initString = "mapreduce";
MiniCluster cluster = MiniCluster.buildCluster();
private PigServer pig ;
public TestOrderBy2() throws Throwable {
pig = new PigServer(initString) ;
}
//////////////////////// Simple Order Tests ///////////////////////
@Test
public void testTopLevelOrderBy_Col0_ASC_NoUsing() throws Exception {
File tmpFile = genDataSetFile1() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $0;",
new int[] { 0 } ,
new boolean[] { false } ) ;
}
@Test
public void testTopLevelOrderBy_Col0_DESC_NoUsing() throws Exception {
File tmpFile = genDataSetFile1() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $0 DESC ;",
new int[] { 0 } ,
new boolean[] { true } ) ;
}
@Test
public void testTopLeveleeOrderBy_Col1_ASC_NoUsing() throws Exception {
File tmpFile = genDataSetFile1() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $1 ASC ;",
new int[] { 1 } ,
new boolean[] { false } ) ;
}
@Test
public void testTopLeveleeOrderBy_Col1_DESC_NoUsing() throws Exception {
File tmpFile = genDataSetFile1() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $1 DESC ;",
new int[] { 1 } ,
new boolean[] { true } ) ;
}
@Test
public void testTopLeveleeOrderBy_Col0Col1_NoUsing() throws Exception {
File tmpFile = genDataSetFile2() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $0, $1 ;",
new int[] { 0, 1 } ,
new boolean[] { false, false } ) ;
}
@Test
public void testTopLeveleeOrderBy_Col0Col1_DESC_NoUsing() throws Exception {
File tmpFile = genDataSetFile2() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $0 DESC, $1 DESC ;",
new int[] { 0, 1 } ,
new boolean[] { true, true } ) ;
}
@Test
public void testTopLeveleeOrderBy_Col1Col0_NoUsing() throws Exception {
File tmpFile = genDataSetFile3() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $1, $0 ;",
new int[] { 1, 0 } ,
new boolean[] { false, false } ) ;
}
@Test
public void testTopLeveleeOrderBy_Col1Col0_DESC_NoUsing() throws Exception {
File tmpFile = genDataSetFile3() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $1 DESC, $0 DESC ;",
new int[] { 1, 0 } ,
new boolean[] { true, true } ) ;
}
@Test
public void testTopLeveleeOrderBy_Col1Col0_ASCDESC_NoUsing() throws Exception {
File tmpFile = genDataSetFile3() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY $1 ASC, $0 DESC ;",
new int[] { 1, 0 } ,
new boolean[] { false, true } ) ;
}
//////////////////////// Star Order Tests ///////////////////////
@Test
public void testTopLevelOrderBy_Star_NoUsing() throws Exception {
File tmpFile = genDataSetFile3() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY * ; ",
new int[] { 0, 1 } ,
new boolean[] { false, false } ) ;
}
@Test
public void testTopLevelOrderBy_Star_DESC_NoUsing() throws Exception {
File tmpFile = genDataSetFile3() ;
runTest("myid = order (load 'file:" + tmpFile + "') BY * DESC ; ",
new int[] { 0, 1 } ,
new boolean[] { true, true } ) ;
}
//////////////////////// HELPERS ///////////////////////////////
/***
* Check if the given dataset is properly sorted
* @param dataIter the dataset to be checked
* @param sortCols list of sorted columns
* @param descFlags flags (true=desc, false=asc)
*/
private void checkOrder(Iterator<Tuple> dataIter,
int[] sortCols,
boolean[] descFlags)
throws ExecException {
Assert.assertEquals("checkOrder params have to be of the same size",
sortCols.length, descFlags.length);
List<String> error = new ArrayList<String>() ;
Tuple lastTuple = null ;
while (dataIter.hasNext()) {
Tuple current = dataIter.next() ;
System.out.println(current.toString()) ;
if (lastTuple != null) {
// do the actual check
for(int i=0; i < sortCols.length ; i++) {
int colIdx = sortCols[i] ;
int lastInt = DataType.toInteger(lastTuple.get(colIdx)) ;
int curInt = DataType.toInteger(current.get(colIdx)) ;
// If it's ascending
if (!descFlags[i]) {
if (curInt < lastInt) {
error.add("Not ASC") ;
}
// if this happens, no need to check further
if (curInt > lastInt) {
break ;
}
}
// If it's descending
else {
if (curInt > lastInt) {
error.add("Not DESC") ;
}
// if this happens, no need to check further
if (curInt < lastInt) {
break ;
}
}
}
}
lastTuple = current ;
}
Assert.assertTrue(error.size()==0);
}
/***
* Main helper for running a sort test
*/
private void runTest(String query,
int[] sortCols,
boolean[] descFlags)
throws Exception {
System.out.println(query) ;
pig.registerQuery(query);
Iterator<Tuple> it = pig.openIterator("myid");
checkOrder(it, sortCols, descFlags) ;
}
/***
* For generating a sample dataset
*/
private File genDataSetFile1() throws IOException {
int dataLength = 256;
String[][] data = new String[dataLength][] ;
DecimalFormat formatter = new DecimalFormat("0000000");
for (int i = 0; i < dataLength; i++) {
data[i] = new String[2] ;
data[i][0] = formatter.format(i);
data[i][1] = formatter.format(dataLength - i - 1);
}
return TestHelper.createTempFile(data) ;
}
/***
* For generating a sample dataset
*/
private File genDataSetFile2() throws IOException {
int dataLength = 256;
String[][] data = new String[dataLength][] ;
DecimalFormat formatter = new DecimalFormat("0000000");
for (int i = 0; i < dataLength; i++) {
data[i] = new String[2] ;
data[i][0] = formatter.format(i % 20);
data[i][1] = formatter.format(dataLength - i - 1);
}
return TestHelper.createTempFile(data) ;
}
/***
* For generating a sample dataset
*/
private File genDataSetFile3() throws IOException {
int dataLength = 256;
String[][] data = new String[dataLength][] ;
DecimalFormat formatter = new DecimalFormat("0000000");
for (int i = 0; i < dataLength; i++) {
data[i] = new String[2] ;
data[i][0] = formatter.format(i);
data[i][1] = formatter.format(i % 20);
}
return TestHelper.createTempFile(data) ;
}
}