/*
* 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.IOException;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.StringTokenizer;
import junit.framework.TestCase;
import org.apache.pig.ComparisonFunc;
import org.apache.pig.EvalFunc;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.builtin.BinStorage;
import org.apache.pig.builtin.PigStorage;
import org.apache.pig.builtin.TextLoader;
import org.apache.pig.data.BagFactory;
import org.apache.pig.data.DataBag;
import org.apache.pig.data.DataByteArray;
import org.apache.pig.data.DataType;
import org.apache.pig.data.DefaultDataBag;
import org.apache.pig.data.Tuple;
import org.apache.pig.data.TupleFactory;
import org.apache.pig.impl.io.FileLocalizer;
import org.apache.pig.impl.io.PigFile;
import org.apache.pig.impl.logicalLayer.schema.Schema;
import org.apache.pig.impl.util.Pair;
import org.apache.pig.test.utils.Identity;
import org.junit.Before;
import org.junit.Test;
public class TestEvalPipelineLocal extends TestCase {
//MiniCluster cluster = MiniCluster.buildCluster();
private PigServer pigServer;
TupleFactory mTf = TupleFactory.getInstance();
@Before
@Override
public void setUp() throws Exception{
FileLocalizer.setR(new Random());
// pigServer = new PigServer(ExecType.MAPREDUCE, cluster.getProperties());
pigServer = new PigServer(ExecType.LOCAL);
}
static public class MyBagFunction extends EvalFunc<DataBag>{
@Override
public DataBag exec(Tuple input) throws IOException {
TupleFactory tf = TupleFactory.getInstance();
DataBag output = BagFactory.getInstance().newDefaultBag();
output.add(tf.newTuple("a"));
output.add(tf.newTuple("a"));
output.add(tf.newTuple("a"));
return output;
}
}
private File createFile(String[] data) throws Exception{
File f = File.createTempFile("tmp", "");
PrintWriter pw = new PrintWriter(f);
for (int i=0; i<data.length; i++){
pw.println(data[i]);
}
pw.close();
return f;
}
@Test
public void testFunctionInsideFunction() throws Exception{
File f1 = createFile(new String[]{"a:1","b:1","a:1"});
pigServer.registerQuery("a = load '" + Util.generateURI(f1.toString()) + "' using " + PigStorage.class.getName() + "(':');");
pigServer.registerQuery("b = foreach a generate 1-1/1;");
Iterator<Tuple> iter = pigServer.openIterator("b");
for (int i=0 ;i<3; i++){
assertEquals(DataType.toDouble(iter.next().get(0)), 0.0);
}
}
@Test
public void testJoin() throws Exception{
File f1 = createFile(new String[]{"a:1","b:1","a:1"});
File f2 = createFile(new String[]{"b","b","a"});
pigServer.registerQuery("a = load '" + Util.generateURI(f1.toString()) + "' using " + PigStorage.class.getName() + "(':');");
pigServer.registerQuery("b = load '" + Util.generateURI(f2.toString()) + "';");
pigServer.registerQuery("c = cogroup a by $0, b by $0;");
pigServer.registerQuery("d = foreach c generate flatten($1),flatten($2);");
Iterator<Tuple> iter = pigServer.openIterator("d");
int count = 0;
while(iter.hasNext()){
Tuple t = iter.next();
assertTrue(t.get(0).toString().equals(t.get(2).toString()));
count++;
}
assertEquals(count, 4);
}
@Test
public void testDriverMethod() throws Exception{
File f = File.createTempFile("tmp", "");
PrintWriter pw = new PrintWriter(f);
pw.println("a");
pw.println("a");
pw.close();
pigServer.registerQuery("a = foreach (load '" + Util.generateURI(f.toString()) + "') generate 1, flatten(" + MyBagFunction.class.getName() + "(*));");
// pigServer.registerQuery("b = foreach a generate $0, flatten($1);");
Iterator<Tuple> iter = pigServer.openIterator("a");
int count = 0;
while(iter.hasNext()){
Tuple t = iter.next();
assertTrue(t.get(0).toString().equals("1"));
assertTrue(t.get(1).toString().equals("a"));
count++;
}
assertEquals(count, 6);
f.delete();
}
@Test
public void testMapLookup() throws Exception {
DataBag b = BagFactory.getInstance().newDefaultBag();
Map<String, Object> colors = new HashMap<String, Object>();
colors.put("apple","red");
colors.put("orange","orange");
Map<String, Object> weights = new HashMap<String, Object>();
weights.put("apple","0.1");
weights.put("orange","0.3");
Tuple t = mTf.newTuple();
t.append(colors);
t.append(weights);
b.add(t);
String fileName = "file:"+File.createTempFile("tmp", "");
PigFile f = new PigFile(fileName);
f.store(b, new BinStorage(), pigServer.getPigContext());
pigServer.registerQuery("a = load '" + Util.encodeEscape(fileName) + "' using BinStorage();");
pigServer.registerQuery("b = foreach a generate $0#'apple',flatten($1#'orange');");
Iterator<Tuple> iter = pigServer.openIterator("b");
t = iter.next();
assertEquals(t.get(0).toString(), "red");
assertEquals(DataType.toDouble(t.get(1)), 0.3);
assertFalse(iter.hasNext());
}
static public class TitleNGrams extends EvalFunc<DataBag> {
@Override
public DataBag exec(Tuple input) throws IOException {
try {
DataBag output = BagFactory.getInstance().newDefaultBag();
String str = input.get(0).toString();
String title = str;
if (title != null) {
List<String> nGrams = makeNGrams(title);
for (Iterator<String> it = nGrams.iterator(); it.hasNext(); ) {
Tuple t = TupleFactory.getInstance().newTuple(1);
t.set(0, it.next());
output.add(t);
}
}
return output;
} catch (ExecException ee) {
IOException ioe = new IOException(ee.getMessage());
ioe.initCause(ee);
throw ioe;
}
}
List<String> makeNGrams(String str) {
List<String> tokens = new ArrayList<String>();
StringTokenizer st = new StringTokenizer(str);
while (st.hasMoreTokens())
tokens.add(st.nextToken());
return nGramHelper(tokens, new ArrayList<String>());
}
ArrayList<String> nGramHelper(List<String> str, ArrayList<String> nGrams) {
if (str.size() == 0)
return nGrams;
for (int i = 0; i < str.size(); i++)
nGrams.add(makeString(str.subList(0, i+1)));
return nGramHelper(str.subList(1, str.size()), nGrams);
}
String makeString(List<String> list) {
StringBuffer sb = new StringBuffer();
for (Iterator<String> it = list.iterator(); it.hasNext(); ) {
sb.append(it.next());
if (it.hasNext())
sb.append(" ");
}
return sb.toString();
}
public Schema outputSchema(Schema input) {
try {
Schema stringSchema = new Schema(new Schema.FieldSchema(null, DataType.CHARARRAY));
Schema.FieldSchema fs = new Schema.FieldSchema(null, stringSchema, DataType.BAG);
return new Schema(fs);
} catch (Exception e) {
return null;
}
}
}
static public class MapUDF extends EvalFunc<Map<String, Object>> {
@Override
public Map<String, Object> exec(Tuple input) throws IOException {
TupleFactory tupleFactory = TupleFactory.getInstance();
ArrayList<Object> objList = new ArrayList<Object>();
objList.add(new Integer(1));
objList.add(new Double(1.0));
objList.add(new Float(1.0));
objList.add(new String("World!"));
Tuple tuple = tupleFactory.newTuple(objList);
BagFactory bagFactory = BagFactory.getInstance();
DataBag bag = bagFactory.newDefaultBag();
bag.add(tuple);
Map<String, Object> mapInMap = new HashMap<String, Object>();
mapInMap.put("int", new Integer(10));
mapInMap.put("float", new Float(10.0));
Map<String, Object> myMap = new HashMap<String, Object>();
myMap.put("string", new String("Hello"));
myMap.put("int", new Integer(1));
myMap.put("long", new Long(1));
myMap.put("float", new Float(1.0));
myMap.put("double", new Double(1.0));
myMap.put("dba", new DataByteArray(new String("bytes").getBytes()));
myMap.put("map", mapInMap);
myMap.put("tuple", tuple);
myMap.put("bag", bag);
return myMap;
}
public Schema outputSchema(Schema input) {
return new Schema(new Schema.FieldSchema(null, DataType.MAP));
}
}
@Test
public void testBagFunctionWithFlattening() throws Exception{
File queryLogFile = createFile(
new String[]{
"stanford\tdeer\tsighting",
"bush\tpresident",
"stanford\tbush",
"conference\tyahoo",
"world\tcup\tcricket",
"bush\twins",
"stanford\tpresident",
}
);
File newsFile = createFile(
new String[]{
"deer seen at stanford",
"george bush visits stanford",
"yahoo hosting a conference in the bay area",
"who will win the world cup"
}
);
Map<String, Integer> expectedResults = new HashMap<String, Integer>();
expectedResults.put("bush", 2);
expectedResults.put("stanford", 3);
expectedResults.put("world", 1);
expectedResults.put("conference", 1);
pigServer.registerQuery("newsArticles = LOAD '" + Util.generateURI(newsFile.toString()) + "' USING " + TextLoader.class.getName() + "();");
pigServer.registerQuery("queryLog = LOAD '" + Util.generateURI(queryLogFile.toString()) + "';");
pigServer.registerQuery("titleNGrams = FOREACH newsArticles GENERATE flatten(" + TitleNGrams.class.getName() + "(*));");
pigServer.registerQuery("cogrouped = COGROUP titleNGrams BY $0 INNER, queryLog BY $0 INNER;");
pigServer.registerQuery("answer = FOREACH cogrouped GENERATE COUNT(queryLog),group;");
Iterator<Tuple> iter = pigServer.openIterator("answer");
if(!iter.hasNext()) fail("No Output received");
while(iter.hasNext()){
Tuple t = iter.next();
assertEquals(expectedResults.get(t.get(1).toString()).doubleValue(),(DataType.toDouble(t.get(0))).doubleValue());
}
}
/*
@Test
public void testSort() throws Exception{
testSortDistinct(false, false);
}
*/
@Test
public void testSortWithUDF() throws Exception{
testSortDistinct(false, true);
}
@Test
public void testDistinct() throws Exception{
testSortDistinct(true, false);
}
public static class TupComp extends ComparisonFunc {
@Override
public int compare(Tuple t1, Tuple t2) {
return t1.compareTo(t2);
}
}
private void testSortDistinct(boolean eliminateDuplicates, boolean useUDF) throws Exception{
int LOOP_SIZE = 1024*16;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_SIZE; i++) {
ps.println(r.nextInt(LOOP_SIZE/2) + "\t" + i);
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null, pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
if (eliminateDuplicates){
pigServer.registerQuery("B = DISTINCT (FOREACH A GENERATE $0) PARALLEL 10;");
}else{
if(!useUDF) {
pigServer.registerQuery("B = ORDER A BY $0 PARALLEL 10;");
} else {
pigServer.registerQuery("B = ORDER A BY $0 using " + TupComp.class.getName() + ";");
}
}
pigServer.store("B", tmpOutputFile);
pigServer.registerQuery("A = load '" + tmpOutputFile + "';");
Iterator<Tuple> iter = pigServer.openIterator("A");
String last = "";
HashSet<Integer> seen = new HashSet<Integer>();
if(!iter.hasNext()) fail("No Results obtained");
while (iter.hasNext()){
Tuple t = iter.next();
//System.out.println(t.get(0).toString());
if (eliminateDuplicates){
Integer act = Integer.parseInt(t.get(0).toString());
assertFalse(seen.contains(act));
seen.add(act);
}else{
assertTrue(last.compareTo(t.get(0).toString())<=0);
assertEquals(t.size(), 2);
last = t.get(0).toString();
}
}
}
public void testNestedPlan() throws Exception{
int LOOP_COUNT = 10;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = group A by $0;");
String query = "C = foreach B {"
+ "C1 = filter A by $0 > -1;"
+ "C2 = distinct C1;"
+ "C3 = distinct A;"
+ "generate (int)group," + Identity.class.getName() +"(*), COUNT(C2), SUM(C2.$1)," + TitleNGrams.class.getName() + "(C3), MAX(C3.$1), C2;"
+ "};";
pigServer.registerQuery(query);
Iterator<Tuple> iter = pigServer.openIterator("C");
if(!iter.hasNext()) fail("No output found");
int numIdentity = 0;
while(iter.hasNext()){
Tuple t = iter.next();
assertEquals((Integer)numIdentity, (Integer)t.get(0));
assertEquals((Long)5L, (Long)t.get(2));
assertEquals(LOOP_COUNT*2.0, (Double)t.get(3), 0.01);
assertEquals(8.0, (Double)t.get(5), 0.01);
assertEquals(5L, ((DataBag)t.get(6)).size());
assertEquals(7, t.size());
++numIdentity;
}
assertEquals(LOOP_COUNT, numIdentity);
}
public void testNestedPlanWithExpressionAssignment() throws Exception{
int LOOP_COUNT = 10;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = group A by $0;");
String query = "C = foreach B {"
+ "C1 = filter A by $0 > -1;"
+ "C2 = distinct C1;"
+ "C3 = distinct A;"
+ "C4 = " + Identity.class.getName() + "(*);"
+ "C5 = COUNT(C2);"
+ "C6 = SUM(C2.$1);"
+ "C7 = " + TitleNGrams.class.getName() + "(C3);"
+ "C8 = MAX(C3.$1);"
+ "generate (int)group, C4, C5, C6, C7, C8, C2;"
+ "};";
pigServer.registerQuery(query);
Iterator<Tuple> iter = pigServer.openIterator("C");
if(!iter.hasNext()) fail("No output found");
int numIdentity = 0;
while(iter.hasNext()){
Tuple t = iter.next();
assertEquals((Integer)numIdentity, (Integer)t.get(0));
assertEquals((Long)5L, (Long)t.get(2));
assertEquals(LOOP_COUNT*2.0, (Double)t.get(3), 0.01);
assertEquals(8.0, (Double)t.get(5), 0.01);
assertEquals(5L, ((DataBag)t.get(6)).size());
assertEquals(7, t.size());
++numIdentity;
}
assertEquals(LOOP_COUNT, numIdentity);
}
public void testLimit() throws Exception{
int LOOP_COUNT = 20;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
ps.println(i);
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = limit A 5;");
Iterator<Tuple> iter = pigServer.openIterator("B");
if(!iter.hasNext()) fail("No output found");
int numIdentity = 0;
while(iter.hasNext()){
Tuple t = iter.next();
++numIdentity;
}
assertEquals(5, numIdentity);
}
@Test
public void testComplexData() throws IOException, ExecException {
// Create input file with ascii data
File input = Util.createInputFile("tmp", "",
new String[] {"{(f1, f2),(f3, f4)}\t(1,2)\t[key1#value1,key2#value2]"});
pigServer.registerQuery("a = load '" + Util.generateURI(input.toString()) + "' using PigStorage() " +
"as (b:bag{t:tuple(x,y)}, t2:tuple(a,b), m:map[]);");
pigServer.registerQuery("b = foreach a generate COUNT(b), t2.a, t2.b, m#'key1', m#'key2';");
Iterator<Tuple> it = pigServer.openIterator("b");
Tuple t = it.next();
assertEquals(new Long(2), t.get(0));
assertEquals("1", t.get(1).toString());
assertEquals("2", t.get(2).toString());
assertEquals("value1", t.get(3).toString());
assertEquals("value2", t.get(4).toString());
//test with BinStorage
pigServer.registerQuery("a = load '" + Util.generateURI(input.toString()) + "' using PigStorage() " +
"as (b:bag{t:tuple(x,y)}, t2:tuple(a,b), m:map[]);");
String output = "./TestEvalPipeline-testComplexData";
pigServer.deleteFile(output);
pigServer.store("a", output, BinStorage.class.getName());
pigServer.registerQuery("x = load '" + output +"' using BinStorage() " +
"as (b:bag{t:tuple(x,y)}, t2:tuple(a,b), m:map[]);");
pigServer.registerQuery("y = foreach x generate COUNT(b), t2.a, t2.b, m#'key1', m#'key2';");
it = pigServer.openIterator("y");
t = it.next();
assertEquals(new Long(2), t.get(0));
assertEquals("1", t.get(1).toString());
assertEquals("2", t.get(2).toString());
assertEquals("value1", t.get(3).toString());
assertEquals("value2", t.get(4).toString());
pigServer.deleteFile(output);
}
@Test
public void testBinStorageDetermineSchema() throws IOException, ExecException {
// Create input file with ascii data
File input = Util.createInputFile("tmp", "",
new String[] {"{(f1, f2),(f3, f4)}\t(1,2)\t[key1#value1,key2#value2]"});
pigServer.registerQuery("a = load 'file:" + Util.encodeEscape(input.toString()) + "' using PigStorage() " +
"as (b:bag{t:tuple(x:chararray,y:chararray)}, t2:tuple(a:int,b:int), m:map[]);");
pigServer.registerQuery("b = foreach a generate COUNT(b), t2.a, t2.b, m#'key1', m#'key2';");
Iterator<Tuple> it = pigServer.openIterator("b");
Tuple t = it.next();
assertEquals(new Long(2), t.get(0));
assertEquals(1, t.get(1));
assertEquals(2, t.get(2));
assertEquals("value1", t.get(3).toString());
assertEquals("value2", t.get(4).toString());
//test with BinStorage
pigServer.registerQuery("a = load 'file:" + Util.encodeEscape(input.toString()) + "' using PigStorage() " +
"as (b:bag{t:tuple(x:chararray,y:chararray)}, t2:tuple(a:int,b:int), m:map[]);");
String output = "./TestEvalPipeline-testBinStorageDetermineSchema";
pigServer.deleteFile(output);
pigServer.store("a", output, BinStorage.class.getName());
// test with different load specifications
String[] loads = {"p = load '" + output +"' using BinStorage() " +
"as (b:bag{t:tuple(x,y)}, t2:tuple(a,b), m:map[]);",
"p = load '" + output +"' using BinStorage() " +
"as (b, t2, m);",
"p = load '" + output +"' using BinStorage() ;"};
// the corresponding generate statements
String[] generates = {"q = foreach p generate COUNT(b), t2.a, t2.b, m#'key1', m#'key2', b;",
"q = foreach p generate COUNT(b), t2.$0, t2.$1, m#'key1', m#'key2', b;",
"q = foreach p generate COUNT($0), $1.$0, $1.$1, $2#'key1', $2#'key2', $0;"};
for (int i = 0; i < loads.length; i++) {
pigServer.registerQuery(loads[i]);
pigServer.registerQuery(generates[i]);
it = pigServer.openIterator("q");
t = it.next();
assertEquals(new Long(2), t.get(0));
assertEquals(Integer.class, t.get(1).getClass());
assertEquals(1, t.get(1));
assertEquals(Integer.class, t.get(2).getClass());
assertEquals(2, t.get(2));
assertEquals("value1", t.get(3).toString());
assertEquals("value2", t.get(4).toString());
assertEquals(DefaultDataBag.class, t.get(5).getClass());
DataBag bg = (DataBag)t.get(5);
for (Iterator<Tuple> bit = bg.iterator(); bit.hasNext();) {
Tuple bt = bit.next();
assertEquals(String.class, bt.get(0).getClass());
assertEquals(String.class, bt.get(1).getClass());
}
}
pigServer.deleteFile(output);
}
@Test
public void testProjectBag() throws IOException, ExecException {
// This tests make sure that when a bag with multiple columns is
// projected all columns apear in the output
File input = Util.createInputFile("tmp", "",
new String[] {"f1\tf2\tf3"});
pigServer.registerQuery("a = load 'file:" + Util.encodeEscape(input.toString()) + "' as (x, y, z);");
pigServer.registerQuery("b = group a by x;");
pigServer.registerQuery("c = foreach b generate flatten(a.(y, z));");
Iterator<Tuple> it = pigServer.openIterator("c");
Tuple t = it.next();
assertEquals(2, t.size());
assertEquals("f2", t.get(0).toString());
assertEquals("f3", t.get(1).toString());
}
@Test
public void testBinStorageDetermineSchema2() throws IOException, ExecException {
// Create input file with ascii data
File input = Util.createInputFile("tmp", "",
new String[] {"pigtester\t10\t1.2"});
pigServer.registerQuery("a = load 'file:" + Util.encodeEscape(input.toString()) + "' using PigStorage() " +
"as (name:chararray, age:int, gpa:double);");
String output = "./TestEvalPipeline-testBinStorageDetermineSchema2";
pigServer.deleteFile(output);
pigServer.store("a", output, BinStorage.class.getName());
// test with different load specifications
String[] loads = {"p = load '" + output +"' using BinStorage() " +
"as (name:chararray, age:int, gpa:double);",
"p = load '" + output +"' using BinStorage() " +
"as (name, age, gpa);",
"p = load '" + output +"' using BinStorage() ;"};
// the corresponding generate statements
String[] generates = {"q = foreach p generate name, age, gpa;",
"q = foreach p generate name, age, gpa;",
"q = foreach p generate $0, $1, $2;"};
for (int i = 0; i < loads.length; i++) {
pigServer.registerQuery(loads[i]);
pigServer.registerQuery(generates[i]);
Iterator<Tuple> it = pigServer.openIterator("q");
Tuple t = it.next();
assertEquals("pigtester", t.get(0));
assertEquals(String.class, t.get(0).getClass());
assertEquals(10, t.get(1));
assertEquals(Integer.class, t.get(1).getClass());
assertEquals(1.2, t.get(2));
assertEquals(Double.class, t.get(2).getClass());
}
// test that valid casting is allowed
pigServer.registerQuery("p = load '" + output + "' using BinStorage() " +
" as (name, age:long, gpa:float);");
pigServer.registerQuery("q = foreach p generate name, age, gpa;");
Iterator<Tuple> it = pigServer.openIterator("q");
Tuple t = it.next();
assertEquals("pigtester", t.get(0));
assertEquals(String.class, t.get(0).getClass());
assertEquals(10L, t.get(1));
assertEquals(Long.class, t.get(1).getClass());
assertEquals(1.2f, t.get(2));
assertEquals(Float.class, t.get(2).getClass());
// test that implicit casts work
pigServer.registerQuery("p = load '" + output + "' using BinStorage() " +
" as (name, age, gpa);");
pigServer.registerQuery("q = foreach p generate name, age + 1L, (int)gpa;");
it = pigServer.openIterator("q");
t = it.next();
assertEquals("pigtester", t.get(0));
assertEquals(String.class, t.get(0).getClass());
assertEquals(11L, t.get(1));
assertEquals(Long.class, t.get(1).getClass());
assertEquals(1, t.get(2));
assertEquals(Integer.class, t.get(2).getClass());
pigServer.deleteFile(output);
}
@Test
public void testCogroupWithInputFromGroup() throws IOException, ExecException {
// Create input file with ascii data
File input = Util.createInputFile("tmp", "",
new String[] {"pigtester\t10\t1.2", "pigtester\t15\t1.2",
"pigtester2\t10\t1.2",
"pigtester3\t10\t1.2", "pigtester3\t20\t1.2", "pigtester3\t30\t1.2"});
Map<String, Pair<Long, Long>> resultMap = new HashMap<String, Pair<Long, Long>>();
// we will in essence be doing a group on first column and getting
// SUM over second column and a count for the group - store
// the results for the three groups above so we can check the output
resultMap.put("pigtester", new Pair<Long, Long>(25L, 2L));
resultMap.put("pigtester2", new Pair<Long, Long>(10L, 1L));
resultMap.put("pigtester3", new Pair<Long, Long>(60L, 3L));
pigServer.registerQuery("a = load 'file:" + Util.encodeEscape(input.toString()) + "' using PigStorage() " +
"as (name:chararray, age:int, gpa:double);");
pigServer.registerQuery("b = group a by name;");
pigServer.registerQuery("c = load 'file:" + Util.encodeEscape(input.toString()) + "' using PigStorage() " +
"as (name:chararray, age:int, gpa:double);");
pigServer.registerQuery("d = cogroup b by group, c by name;");
pigServer.registerQuery("e = foreach d generate flatten(group), SUM(c.age), COUNT(c.name);");
Iterator<Tuple> it = pigServer.openIterator("e");
for(int i = 0; i < resultMap.size(); i++) {
Tuple t = it.next();
assertEquals(true, resultMap.containsKey(t.get(0)));
Pair<Long, Long> output = resultMap.get(t.get(0));
assertEquals(output.first, t.get(1));
assertEquals(output.second, t.get(2));
}
}
@Test
public void testUtf8Dump() throws IOException, ExecException {
// Create input file with unicode data
File input = Util.createInputFile("tmp", "",
new String[] {"wendyξ"});
pigServer.registerQuery("a = load 'file:" + Util.encodeEscape(input.toString()) + "' using PigStorage() " +
"as (name:chararray);");
Iterator<Tuple> it = pigServer.openIterator("a");
Tuple t = it.next();
assertEquals("wendyξ", t.get(0));
}
public void testMapUDF() throws Exception{
int LOOP_COUNT = 2;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = foreach A generate " + MapUDF.class.getName() + "($0) as mymap;"); //the argument does not matter
String query = "C = foreach B {"
+ "generate (double)mymap#'double' as d, (long)mymap#'long' + (float)mymap#'float' as float_sum, CONCAT((chararray) mymap#'string', ' World!'), mymap#'int' * 10, (bag{tuple()}) mymap#'bag' as mybag, (tuple()) mymap#'tuple' as mytuple, (map[])mymap#'map' as mapInMap, mymap#'dba' as dba;"
+ "};";
pigServer.registerQuery(query);
Iterator<Tuple> iter = pigServer.openIterator("C");
if(!iter.hasNext()) fail("No output found");
int numIdentity = 0;
while(iter.hasNext()){
Tuple t = iter.next();
assertEquals(1.0, (Double)t.get(0), 0.01);
assertEquals(2.0, (Float)t.get(1), 0.01);
assertTrue(((String)t.get(2)).equals("Hello World!"));
assertEquals(new Integer(10), (Integer)t.get(3));
assertEquals(1, ((DataBag)t.get(4)).size());
assertEquals(4, ((Tuple)t.get(5)).size());
assertEquals(2, ((Map<String, Object>)t.get(6)).size());
assertEquals(DataByteArray.class, t.get(7).getClass());
assertEquals(8, t.size());
++numIdentity;
}
assertEquals(LOOP_COUNT * LOOP_COUNT, numIdentity);
}
public void testMapUDFFail() throws Exception{
int LOOP_COUNT = 2;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = foreach A generate " + MapUDF.class.getName() + "($0) as mymap;"); //the argument does not matter
String query = "C = foreach B {"
+ "generate mymap#'dba' * 10;"
+ "};";
pigServer.registerQuery(query);
try {
Iterator<Tuple> iter = pigServer.openIterator("C");
fail("Error expected.");
} catch (Exception e) {
e.getMessage().contains("Cannot determine");
}
}
@Test
public void testLoadCtorArgs() throws IOException, ExecException {
// Create input file
File input = Util.createInputFile("tmp", "",
new String[] {"hello:world"});
pigServer.registerQuery("a = load 'file:" + Util.encodeEscape(input.toString()) +
"' using org.apache.pig.test.PigStorageNoDefCtor(':');");
pigServer.registerQuery("b = foreach a generate (chararray)$0, (chararray)$1;");
Iterator<Tuple> it = pigServer.openIterator("b");
Tuple t = it.next();
assertEquals("hello", t.get(0));
assertEquals("world", t.get(1));
}
@Test
public void testNestedPlanForCloning() throws Exception{
int LOOP_COUNT = 10;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = group A by $0;");
String query = "C = foreach B {"
+ "C1 = filter A by not($0 <= -1);"
+ "C2 = distinct C1;"
+ "C3 = distinct A;"
+ "C4 = order A by $0;"
+ "generate (group + 1) * 10, COUNT(C4), COUNT(C2), SUM(C2.$1)," + TitleNGrams.class.getName() + "(C3), MAX(C3.$1), C2;"
+ "};";
pigServer.registerQuery(query);
Iterator<Tuple> iter = pigServer.openIterator("C");
if(!iter.hasNext()) fail("No output found");
int numIdentity = 0;
while(iter.hasNext()){
Tuple t = iter.next();
assertEquals((Integer)((numIdentity + 1) * 10), (Integer)t.get(0));
assertEquals((Long)10L, (Long)t.get(1));
assertEquals((Long)5L, (Long)t.get(2));
assertEquals(LOOP_COUNT*2.0, (Double)t.get(3), 0.01);
assertEquals(8.0, (Double)t.get(5), 0.01);
assertEquals(5L, ((DataBag)t.get(6)).size());
assertEquals(7, t.size());
++numIdentity;
}
assertEquals(LOOP_COUNT, numIdentity);
}
@Test
public void testArithmeticCloning() throws Exception{
int LOOP_COUNT = 10;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = distinct A;");
String query = "C = foreach B {"
+ "C1 = $1 - $0;"
+ "C2 = $1%2;"
+ "C3 = ($1 == 0? 0 : $0/$1);"
+ "generate C1, C2, C3;"
+ "};";
pigServer.registerQuery(query);
Iterator<Tuple> iter = pigServer.openIterator("C");
if(!iter.hasNext()) fail("No output found");
int numRows = 0;
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j = 0; j < LOOP_COUNT; j+=2){
Tuple t = null;
if(iter.hasNext()) t = iter.next();
assertEquals(3, t.size());
assertEquals(new Double(j - i), (Double)t.get(0), 0.01);
assertEquals((Integer)(j%2), (Integer)t.get(1));
if(j == 0) {
assertEquals(0.0, (Double)t.get(2), 0.01);
} else {
assertEquals((Double)((double)i/j), (Double)t.get(2), 0.01);
}
++numRows;
}
}
assertEquals((LOOP_COUNT * LOOP_COUNT)/2, numRows);
}
@Test
public void testExpressionReUse() throws Exception{
int LOOP_COUNT = 10;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = distinct A;");
String query = "C = foreach B {"
+ "C1 = $0 + $1;"
+ "C2 = C1 + $0;"
+ "generate C1, C2;"
+ "};";
pigServer.registerQuery(query);
Iterator<Tuple> iter = pigServer.openIterator("C");
if(!iter.hasNext()) fail("No output found");
int numRows = 0;
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j = 0; j < LOOP_COUNT; j+=2){
Tuple t = null;
if(iter.hasNext()) t = iter.next();
assertEquals(2, t.size());
assertEquals(new Double(i + j), (Double)t.get(0), 0.01);
assertEquals(new Double(i + j + i), (Double)t.get(1));
++numRows;
}
}
assertEquals((LOOP_COUNT * LOOP_COUNT)/2, numRows);
}
@Test
public void testIdentity() throws Exception{
int LOOP_COUNT = 2;
File tmpFile = File.createTempFile("test", "txt");
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
Random r = new Random();
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j=0;j<LOOP_COUNT;j+=2){
ps.println(i+"\t"+j);
ps.println(i+"\t"+j);
}
}
ps.close();
String tmpOutputFile = FileLocalizer.getTemporaryPath(null,
pigServer.getPigContext()).toString();
pigServer.registerQuery("A = LOAD '" + Util.generateURI(tmpFile.toString()) + "';");
pigServer.registerQuery("B = distinct A ;"); //the argument does not matter
pigServer.registerQuery("C = foreach B generate FLATTEN(" + Identity.class.getName() + "($0, $1));"); //the argument does not matter
Iterator<Tuple> iter = pigServer.openIterator("C");
if(!iter.hasNext()) fail("No output found");
int numRows = 0;
for(int i = 0; i < LOOP_COUNT; i++) {
for(int j = 0; j < LOOP_COUNT; j+=2){
Tuple t = null;
if(iter.hasNext()) t = iter.next();
assertEquals(2, t.size());
assertEquals(new Double(i), new Double(t.get(0).toString()), 0.01);
assertEquals(new Double(j), new Double(t.get(1).toString()), 0.01);
++numRows;
}
}
assertEquals((LOOP_COUNT * LOOP_COUNT)/2, numRows);
}
}