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Posted to commits@pig.apache.org by xu...@apache.org on 2011/05/03 18:58:21 UTC

svn commit: r1099123 [11/16] - in /pig/branches/branch-0.9: ./ src/org/apache/pig/ src/org/apache/pig/backend/hadoop/executionengine/ src/org/apache/pig/backend/hadoop/executionengine/mapReduceLayer/ src/org/apache/pig/impl/ src/org/apache/pig/impl/log...

Modified: pig/branches/branch-0.9/test/org/apache/pig/test/TestRelevantFields.java
URL: http://svn.apache.org/viewvc/pig/branches/branch-0.9/test/org/apache/pig/test/TestRelevantFields.java?rev=1099123&r1=1099122&r2=1099123&view=diff
==============================================================================
--- pig/branches/branch-0.9/test/org/apache/pig/test/TestRelevantFields.java (original)
+++ pig/branches/branch-0.9/test/org/apache/pig/test/TestRelevantFields.java Tue May  3 16:58:19 2011
@@ -1,1335 +0,0 @@
-/*
- * 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.util.List;
-import java.util.Properties;
-
-import org.apache.pig.ExecType;
-import org.apache.pig.impl.PigContext;
-import org.apache.pig.impl.logicalLayer.FrontendException;
-import org.apache.pig.impl.logicalLayer.LOCogroup;
-import org.apache.pig.impl.logicalLayer.LOCross;
-import org.apache.pig.impl.logicalLayer.LODistinct;
-import org.apache.pig.impl.logicalLayer.LOFilter;
-import org.apache.pig.impl.logicalLayer.LOForEach;
-import org.apache.pig.impl.logicalLayer.LOJoin;
-import org.apache.pig.impl.logicalLayer.LOLimit;
-import org.apache.pig.impl.logicalLayer.LOSort;
-import org.apache.pig.impl.logicalLayer.LOSplit;
-import org.apache.pig.impl.logicalLayer.LOSplitOutput;
-import org.apache.pig.impl.logicalLayer.LOStream;
-import org.apache.pig.impl.logicalLayer.LOUnion;
-import org.apache.pig.impl.logicalLayer.LogicalPlan;
-import org.apache.pig.impl.plan.RequiredFields;
-import org.apache.pig.impl.util.Pair;
-import org.apache.pig.test.utils.LogicalPlanTester;
-import org.junit.Test;
-
-import junit.framework.TestCase;
-
-public class TestRelevantFields extends TestCase {
-
-    private static final String simpleEchoStreamingCommand;
-    static {
-        if (System.getProperty("os.name").toUpperCase().startsWith("WINDOWS"))
-            simpleEchoStreamingCommand = "perl -ne 'print \\\"$_\\\"'";
-        else
-            simpleEchoStreamingCommand = "perl -ne 'print \"$_\"'";
-    }
-    
-    PigContext pc = new PigContext(ExecType.LOCAL, new Properties());
-    LogicalPlanTester planTester = new LogicalPlanTester(pc);
-    @Test
-    public void testQueryForeach1() throws FrontendException {
-        String query = "foreach (load 'a') generate $1,$2;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().size() == 1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 1);
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 1);
-        assertTrue(foreachRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields1.getFields().get(0).second == 2);
-    }
-
-    @Test
-    public void testQueryForeach2() throws FrontendException {
-        String query = "foreach (load 'a') generate $1,$2+$3;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 1);
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 2);
-        assertTrue(foreachRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 2)));
-        assertTrue(foreachRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 3)));
-    }
-    
-    @Test
-    public void testQueryForeach3() throws FrontendException {
-        String query = "foreach (load 'a') generate $1,CONCAT($2,$3);";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 1);
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 2);
-        assertTrue(foreachRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 2)));
-        assertTrue(foreachRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 3)));
-    }
-    
-    @Test
-    public void testQueryCogroup1() throws FrontendException {
-        String query = "foreach (cogroup (load 'a') by $1, (load 'b') by $1) generate org.apache.pig.builtin.AVG($1) ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields cogroupRelevantFields0 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields0.getNeedAllFields()==false);
-        assertTrue(cogroupRelevantFields0.getNeedNoFields()==false);
-        assertTrue(cogroupRelevantFields0.getFields().size()==1);
-        assertTrue(cogroupRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 0).get(1);
-        assertTrue(cogroupRelevantFields1.getFields().size()==1);
-        assertTrue(cogroupRelevantFields1.getFields().contains(new Pair<Integer, Integer>(1, 1)));
-        
-        RequiredFields cogroupRelevantFields10 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields10.needNoFields() == false);
-        assertTrue(cogroupRelevantFields10.needAllFields() == true);
-        assertTrue(cogroupRelevantFields10.getFields() == null);
-        
-        RequiredFields cogroupRelevantFields11 = cogroup.getRelevantInputs(0, 1).get(1);
-        assertTrue(cogroupRelevantFields11 == null);
-        
-        RequiredFields cogroupRelevantFields20 = cogroup.getRelevantInputs(0, 2).get(0);
-        assertTrue(cogroupRelevantFields20 == null);
-        
-        RequiredFields cogroupRelevantFields21 = cogroup.getRelevantInputs(0, 2).get(1);
-        assertTrue(cogroupRelevantFields21.needNoFields() == false);
-        assertTrue(cogroupRelevantFields21.needAllFields() == true);
-        assertTrue(cogroupRelevantFields21.getFields() == null);
-    }
-
-    @Test
-    public void testQueryGroupAll() throws FrontendException  {
-        String query = "foreach (group (load 'a') ALL) generate $1 ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields cogroupRelevantFields0 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields0.getNeedAllFields()==false);
-        assertTrue(cogroupRelevantFields0.getNeedNoFields()==true);
-        assertTrue(cogroupRelevantFields0.getFields()==null);
-        
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields1.getNeedAllFields()==true);
-        assertTrue(cogroupRelevantFields1.getNeedNoFields()==false);
-        assertTrue(cogroupRelevantFields1.getFields()==null);
-    }
-    
-    @Test
-    public void testQueryGroup2() throws FrontendException {
-        String query = "foreach (group (load 'a') by $1) generate group, '1' ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields cogroupRelevantFields0 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields0.getNeedAllFields()==false);
-        assertTrue(cogroupRelevantFields0.getNeedNoFields()==false);
-        assertTrue(cogroupRelevantFields0.getFields().size()==1);
-        assertTrue(cogroupRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields1.getNeedAllFields()==true);
-        assertTrue(cogroupRelevantFields1.getNeedNoFields()==false);
-        assertTrue(cogroupRelevantFields1.getFields()==null);
-    }
-
-    @Test
-    public void testQueryCogroup2() throws FrontendException {
-        String query = "foreach (cogroup (load 'a') by ($1), (load 'b') by ($1)) generate $1.$1, $2.$1 ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields cogroupRelevantFields01 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields01.getFields().size() == 1);
-        assertTrue(cogroupRelevantFields01.getNeedAllFields() == false);
-        assertTrue(cogroupRelevantFields01.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields01.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        RequiredFields cogroupRelevantFields02 = cogroup.getRelevantInputs(0, 0).get(1);
-        assertTrue(cogroupRelevantFields02.getFields().size() == 1);
-        assertTrue(cogroupRelevantFields02.getNeedAllFields() == false);
-        assertTrue(cogroupRelevantFields02.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields02.getFields().contains(new Pair<Integer, Integer>(1, 1)));
-        
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields1.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields1.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields1.getFields() == null);
-        
-        RequiredFields cogroupRelevantFields2 = cogroup.getRelevantInputs(0, 2).get(1);
-        assertTrue(cogroupRelevantFields2.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields2.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields2.getFields() == null);
-    }
-    
-    @Test
-    public void testQueryGroup3() throws FrontendException {
-        String query = "foreach (group (load 'a') by ($6, $7)) generate flatten(group) ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields cogroupRelevantFields0 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields0.getNeedAllFields() == false);
-        assertTrue(cogroupRelevantFields0.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields0.getFields().size() == 2);
-        assertTrue(cogroupRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 6)));
-        assertTrue(cogroupRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 7)));
-        
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields1.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields1.getNeedNoFields() == false);        
-    }
-
-    public void testQueryFilterNoSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a';");
-        LogicalPlan lp = planTester.buildPlan("b = filter a by $1 == '3';");
-        
-        LOFilter filter = (LOFilter)lp.getLeaves().get(0);
-        List<RequiredFields> filterRelevantFields0 = filter.getRelevantInputs(0, 0);
-        assertTrue(filterRelevantFields0.get(0).getFields().size() == 1);
-        assertTrue(filterRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(filterRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(filterRelevantFields0.get(0).getFields().contains(new Pair<Integer, Integer>(0, 0)));
-    }
-
-    @Test
-    public void testQuerySplitNoSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a';");
-        LogicalPlan lp = planTester.buildPlan("split a into b if $0 == '3', c if $1 == '3';");
-        
-        LOSplit split = (LOSplit)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields splitRelevantFields = split.getRelevantInputs(0, 0).get(0);
-        assertTrue(splitRelevantFields.needAllFields() == false);
-        assertTrue(splitRelevantFields.needNoFields() == false);
-        assertTrue(splitRelevantFields.getFields().size() == 1);
-
-        LOSplitOutput splitb = (LOSplitOutput)lp.getSuccessors(split).get(0);
-        RequiredFields splitbRelevantFields0 = splitb.getRelevantInputs(0, 0).get(0);
-        assertTrue(splitbRelevantFields0.getNeedAllFields() == false);
-        assertTrue(splitbRelevantFields0.getNeedNoFields() == false);
-        assertTrue(splitbRelevantFields0.getFields().size() == 1);
-        assertTrue(splitbRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(splitbRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields splitbRelevantFields1 = splitb.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitbRelevantFields1.getNeedAllFields() == false);
-        assertTrue(splitbRelevantFields1.getNeedNoFields() == false);
-        assertTrue(splitbRelevantFields1.getFields().size() == 1);
-        assertTrue(splitbRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        
-        LOSplitOutput splitc = (LOSplitOutput)lp.getSuccessors(split).get(1);
-        RequiredFields splitcRelevantFields0 = splitc.getRelevantInputs(0, 0).get(0);
-        assertTrue(splitcRelevantFields0.getNeedAllFields() == false);
-        assertTrue(splitcRelevantFields0.getNeedNoFields() == false);
-        assertTrue(splitcRelevantFields0.getFields().size() == 1);
-        assertTrue(splitcRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields splitcRelevantFields = splitc.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitcRelevantFields.getNeedAllFields() == false);
-        assertTrue(splitcRelevantFields.getNeedNoFields() == false);
-        assertTrue(splitcRelevantFields.getFields().size() == 1);
-        assertTrue(splitcRelevantFields.getFields().get(0).first == 0);
-        assertTrue(splitcRelevantFields.getFields().get(0).second == 1);
-    }
-
-    @Test
-    public void testQueryOrderByNoSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a';");
-        LogicalPlan lp = planTester.buildPlan("b = order a by $1;");
-        
-        LOSort sort = (LOSort)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields sortRelevantFields0 = sort.getRelevantInputs(0, 0).get(0);
-        assertTrue(sortRelevantFields0.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields0.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields0.getFields().size() == 1);
-        assertTrue(sortRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields sortRelevantFields1 = sort.getRelevantInputs(0, 1).get(0);
-        assertTrue(sortRelevantFields1.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields1.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields1.getFields().size() == 1);
-        assertTrue(sortRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-    }
-    
-    @Test
-    public void testQueryLimitNoSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a';");
-        planTester.buildPlan("b = order a by $1;");
-        LogicalPlan lp = planTester.buildPlan("c = limit b 10;");
-        
-        LOLimit limit = (LOLimit)lp.getLeaves().get(0);
-        List<RequiredFields> limitRelevantFields0 = limit.getRelevantInputs(0, 0);
-        assertTrue(limitRelevantFields0.get(0).getFields().size()==1);
-        assertTrue(limitRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(limitRelevantFields0.get(0).getNeedNoFields()==false);
-        assertTrue(limitRelevantFields0.get(0).getFields().get(0).first == 0);
-        assertTrue(limitRelevantFields0.get(0).getFields().get(0).second == 0);
-        
-        List<RequiredFields> limitRelevantFields1 = limit.getRelevantInputs(0, 1);
-        assertTrue(limitRelevantFields1.get(0).getFields().size()==1);
-        assertTrue(limitRelevantFields1.get(0).getNeedAllFields()==false);
-        assertTrue(limitRelevantFields1.get(0).getNeedNoFields()==false);
-        assertTrue(limitRelevantFields1.get(0).getFields().get(0).first == 0);
-        assertTrue(limitRelevantFields1.get(0).getFields().get(0).second == 1);
-    }
-    
-    @Test
-    public void testQueryDistinctNoSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a';");
-        LogicalPlan lp = planTester.buildPlan("b = distinct a;");
-        
-        LODistinct distinct = (LODistinct)lp.getLeaves().get(0);
-        List<RequiredFields> distinctRelevantFields0 = distinct.getRelevantInputs(0, 0);
-        assertTrue(distinctRelevantFields0.get(0).getFields().size()==1);
-        assertTrue(distinctRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(distinctRelevantFields0.get(0).getNeedNoFields()==false);
-        assertTrue(distinctRelevantFields0.get(0).getFields().get(0).first == 0);
-        assertTrue(distinctRelevantFields0.get(0).getFields().get(0).second == 0);
-        
-        List<RequiredFields> distinctRelevantFields1 = distinct.getRelevantInputs(0, 1);
-        assertTrue(distinctRelevantFields1.get(0).getFields().size()==1);
-        assertTrue(distinctRelevantFields1.get(0).getNeedAllFields()==false);
-        assertTrue(distinctRelevantFields1.get(0).getNeedNoFields()==false);
-        assertTrue(distinctRelevantFields1.get(0).getFields().get(0).first == 0);
-        assertTrue(distinctRelevantFields1.get(0).getFields().get(0).second == 1);
-    }
-    
-    @Test
-    public void testQueryStreamingNoSchema() throws FrontendException {
-        String query = "stream (load 'a') through `" + simpleEchoStreamingCommand + "`;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOStream stream = (LOStream)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields streamRelevantFields = stream.getRelevantInputs(0, 0).get(0);
-        assertTrue(streamRelevantFields.getNeedAllFields() == true);
-        assertTrue(streamRelevantFields.getNeedNoFields() == false);
-        assertTrue(streamRelevantFields.getFields() == null);
-    }
-
-    @Test
-    public void testQueryStreamingNoSchema1() throws FrontendException {
-        String query = "stream (load 'a' as (url, hitCount)) through `" + simpleEchoStreamingCommand + "` ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOStream stream = (LOStream)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields streamRelevantFields = stream.getRelevantInputs(0, 0).get(0);
-        assertTrue(streamRelevantFields.getNeedAllFields() == true);
-        assertTrue(streamRelevantFields.getNeedNoFields() == false);
-        assertTrue(streamRelevantFields.getFields() == null);
-    }
-    
-    @Test
-    public void testQueryForeach4() throws FrontendException {
-        planTester.buildPlan("A = load 'a';");
-        planTester.buildPlan("B = load 'b';");
-        LogicalPlan lp = planTester.buildPlan("foreach (cogroup A by ($1), B by ($1)) generate A, flatten(B.($1, $2, $3));");
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().size() == 1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 1);
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 1);
-        assertTrue(foreachRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields1.getFields().get(0).second == 2);
-        RequiredFields foreachRelevantFields2 = foreach.getRelevantInputs(0, 2).get(0);
-        assertTrue(foreachRelevantFields2.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields2.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields2.getFields().size() == 1);
-        assertTrue(foreachRelevantFields2.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields2.getFields().get(0).second == 2);
-        RequiredFields foreachRelevantFields3 = foreach.getRelevantInputs(0, 3).get(0);
-        assertTrue(foreachRelevantFields3.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields3.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields3.getFields().size() == 1);
-        assertTrue(foreachRelevantFields3.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields3.getFields().get(0).second == 2);
-        assertTrue(foreach.getRelevantInputs(0, 4) == null);
-    }
-
-    @Test
-    public void testForeach5() throws FrontendException {
-        planTester.buildPlan("A = load 'a' AS (a1, a2, a3);");
-        planTester.buildPlan("B = load 'b' AS (b1, b2, b3, b4);");
-        planTester.buildPlan("C = cogroup A by ($1), B by ($1);");
-        String query = "foreach C { " +
-                "B = order B by $0; " +
-                "generate FLATTEN(A), B.($1, $2, $3) ;" +
-                "};" ;
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields()==false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields()==false);
-        assertTrue(foreachRelevantFields0.getFields().size()==1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 1);
-        
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields()==false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields()==false);
-        assertTrue(foreachRelevantFields1.getFields().size()==1);
-        assertTrue(foreachRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields1.getFields().get(0).second == 1);
-        
-        RequiredFields foreachRelevantFields2 = foreach.getRelevantInputs(0, 2).get(0);
-        assertTrue(foreachRelevantFields2.getNeedAllFields()==false);
-        assertTrue(foreachRelevantFields2.getNeedNoFields()==false);
-        assertTrue(foreachRelevantFields2.getFields().size()==1);
-        assertTrue(foreachRelevantFields2.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields2.getFields().get(0).second == 1);
-        
-        RequiredFields foreachRelevantFields3 = foreach.getRelevantInputs(0, 3).get(0);
-        assertTrue(foreachRelevantFields3.getNeedAllFields()==false);
-        assertTrue(foreachRelevantFields3.getNeedNoFields()==false);
-        assertTrue(foreachRelevantFields3.getFields().size()==1);
-        assertTrue(foreachRelevantFields3.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields3.getFields().get(0).second == 2);
-    }
-    
-    @Test
-    public void testQueryCrossNoSchema() throws FrontendException {
-        String query = "c = cross (load 'a'), (load 'b');";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOCross cross = (LOCross)lp.getLeaves().get(0);
-        assertTrue(cross.getRelevantInputs(0, 0)==null);
-    }
-    
-    @Test
-    public void testQueryUnionNoSchema() throws FrontendException {
-        String query = "c = union (load 'a'), (load 'b');";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOUnion union = (LOUnion)lp.getLeaves().get(0);
-        RequiredFields unionRelevantFields0 = union.getRelevantInputs(0, 0).get(0);
-        assertTrue(unionRelevantFields0.getNeedAllFields() == false);
-        assertTrue(unionRelevantFields0.getNeedNoFields() == false);
-        assertTrue(unionRelevantFields0.getFields().size() == 1);
-        assertTrue(unionRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields unionRelevantFields1 = union.getRelevantInputs(0, 0).get(1);
-        assertTrue(unionRelevantFields1.getNeedAllFields() == false);
-        assertTrue(unionRelevantFields1.getNeedNoFields() == false);
-        assertTrue(unionRelevantFields1.getFields().size() == 1);
-        assertTrue(unionRelevantFields1.getFields().contains(new Pair<Integer, Integer>(1, 0)));
-    }
-
-    public void testQueryFRJoinNoSchema() throws FrontendException {
-        String query = "c = join (load 'a') by $0, (load 'b') by $0 using \"replicated\";";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin frjoin = (LOJoin)lp.getLeaves().get(0);
-        assertTrue(frjoin.getRelevantInputs(0, 0) == null);
-    }
-    
-    @Test
-    public void testQueryJoinNoSchema() throws FrontendException {
-        String query = "c = join (load 'a') by $0, (load 'b') by $0;";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin join = (LOJoin)lp.getLeaves().get(0);
-        assertTrue(join.getRelevantInputs(0, 0) == null);
-    }
-    
-    @Test
-    public void testQueryFilterWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url,hitCount);");
-        LogicalPlan lp = planTester.buildPlan("b = filter a by $1 == '3';");
-        
-        LOFilter filter = (LOFilter)lp.getLeaves().get(0);
-        List<RequiredFields> filterRelevantFields0 = filter.getRelevantInputs(0, 0);
-        assertTrue(filterRelevantFields0.get(0).getFields().size() == 1);
-        assertTrue(filterRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(filterRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(filterRelevantFields0.get(0).getFields().contains(new Pair<Integer, Integer>(0, 0)));
-    }
-    
-    @Test
-    public void testQuerySplitWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url, hitCount);");
-        LogicalPlan lp = planTester.buildPlan("split a into b if url == '3', c if hitCount == '3';");
-        
-        LOSplit split = (LOSplit)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields splitRelevantFields0 = split.getRelevantInputs(0, 0).get(0);
-        assertTrue(splitRelevantFields0.needAllFields() == false);
-        assertTrue(splitRelevantFields0.needNoFields() == false);
-        assertTrue(splitRelevantFields0.getFields().size() == 1);
-        assertTrue(splitRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields splitRelevantFields1 = split.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitRelevantFields1.needAllFields() == false);
-        assertTrue(splitRelevantFields1.needNoFields() == false);
-        assertTrue(splitRelevantFields1.getFields().size() == 1);
-        assertTrue(splitRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-
-        assertTrue(split.getRelevantInputs(0, 2) == null);
-
-        LOSplitOutput splitb = (LOSplitOutput)lp.getSuccessors(split).get(0);
-        RequiredFields splitbRelevantFields = splitb.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitbRelevantFields.getNeedAllFields() == false);
-        assertTrue(splitbRelevantFields.getNeedNoFields() == false);
-        assertTrue(splitbRelevantFields.getFields().size() == 1);
-        assertTrue(splitbRelevantFields.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        
-        LOSplitOutput splitc = (LOSplitOutput)lp.getSuccessors(split).get(0);
-        RequiredFields splitcRelevantFields = splitc.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitcRelevantFields.getNeedAllFields() == false);
-        assertTrue(splitcRelevantFields.getNeedNoFields() == false);
-        assertTrue(splitcRelevantFields.getFields().size() == 1);
-        assertTrue(splitcRelevantFields.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-    }
-    
-    @Test
-    public void testQueryOrderByWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url,hitCount);");
-        LogicalPlan lp = planTester.buildPlan("b = order a by $1;");
-        
-        LOSort sort = (LOSort)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields sortRelevantFields0 = sort.getRelevantInputs(0, 0).get(0);
-        assertTrue(sortRelevantFields0.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields0.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields0.getFields().size() == 1);
-        assertTrue(sortRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields sortRelevantFields1 = sort.getRelevantInputs(0, 1).get(0);
-        assertTrue(sortRelevantFields1.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields1.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields1.getFields().size() == 1);
-        assertTrue(sortRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-    }
-    
-    @Test
-    public void testQueryLimitWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url,hitCount);");
-        planTester.buildPlan("b = order a by $1;");
-        LogicalPlan lp = planTester.buildPlan("c = limit b 10;");
-        
-        LOLimit limit = (LOLimit)lp.getLeaves().get(0);
-        List<RequiredFields> limitRelevantFields0 = limit.getRelevantInputs(0, 0);
-        assertTrue(limitRelevantFields0.get(0).getFields().size()==1);
-        assertTrue(limitRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(limitRelevantFields0.get(0).getNeedNoFields()==false);
-        assertTrue(limitRelevantFields0.get(0).getFields().get(0).first == 0);
-        assertTrue(limitRelevantFields0.get(0).getFields().get(0).second == 0);
-        
-        List<RequiredFields> limitRelevantFields1 = limit.getRelevantInputs(0, 1);
-        assertTrue(limitRelevantFields1.get(0).getFields().size()==1);
-        assertTrue(limitRelevantFields1.get(0).getNeedAllFields()==false);
-        assertTrue(limitRelevantFields1.get(0).getNeedNoFields()==false);
-        assertTrue(limitRelevantFields1.get(0).getFields().get(0).first == 0);
-        assertTrue(limitRelevantFields1.get(0).getFields().get(0).second == 1);
-    }
-    
-    @Test
-    public void testQueryDistinctWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url,hitCount);");
-        LogicalPlan lp = planTester.buildPlan("b = distinct a;");
-        
-        LODistinct distinct = (LODistinct)lp.getLeaves().get(0);
-        List<RequiredFields> distinctRelevantFields0 = distinct.getRelevantInputs(0, 0);
-        assertTrue(distinctRelevantFields0.get(0).getFields().size()==1);
-        assertTrue(distinctRelevantFields0.get(0).getNeedAllFields()==false);
-        assertTrue(distinctRelevantFields0.get(0).getNeedNoFields()==false);
-        assertTrue(distinctRelevantFields0.get(0).getFields().get(0).first == 0);
-        assertTrue(distinctRelevantFields0.get(0).getFields().get(0).second == 0);
-        
-        List<RequiredFields> distinctRelevantFields1 = distinct.getRelevantInputs(0, 1);
-        assertTrue(distinctRelevantFields1.get(0).getFields().size()==1);
-        assertTrue(distinctRelevantFields1.get(0).getNeedAllFields()==false);
-        assertTrue(distinctRelevantFields1.get(0).getNeedNoFields()==false);
-        assertTrue(distinctRelevantFields1.get(0).getFields().get(0).first == 0);
-        assertTrue(distinctRelevantFields1.get(0).getFields().get(0).second == 1);
-    }
-
-    @Test
-    public void testQueryStreamingWithSchema() throws FrontendException {
-        String query = "stream (load 'a') through `" + simpleEchoStreamingCommand + "` as (x, y);";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOStream stream = (LOStream)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields streamRelevantFields = stream.getRelevantInputs(0, 0).get(0);
-        assertTrue(streamRelevantFields.getNeedAllFields() == true);
-        assertTrue(streamRelevantFields.getNeedNoFields() == false);
-        assertTrue(streamRelevantFields.getFields() == null);
-    }
-
-    @Test
-    public void testQueryStreamingWithSchema1() throws FrontendException {
-        String query = "stream (load 'a' as (url, hitCount)) through `" + simpleEchoStreamingCommand + "` as (x, y);";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOStream stream = (LOStream)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields streamRelevantFields = stream.getRelevantInputs(0, 0).get(0);
-        assertTrue(streamRelevantFields.getNeedAllFields() == true);
-        assertTrue(streamRelevantFields.getNeedNoFields() == false);
-        assertTrue(streamRelevantFields.getFields() == null);
-    }
-    
-    @Test
-    public void testQueryImplicitJoinWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url,hitCount);");
-        planTester.buildPlan("b = load 'b' as (url,rank);");
-        planTester.buildPlan("c = cogroup a by url, b by url;");
-        LogicalPlan lp = planTester.buildPlan("d = foreach c generate group,flatten(a),flatten(b);");
-
-        //check cogroup required fields
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        assertTrue(cogroup.getRelevantInputs(0, 0).size() == 2);
-        RequiredFields cogroupRelevantFields00 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields00.getNeedAllFields() == false);
-        assertTrue(cogroupRelevantFields00.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields00.getFields().size() == 1);
-        assertTrue(cogroupRelevantFields00.getFields().get(0).first == 0);
-        assertTrue(cogroupRelevantFields00.getFields().get(0).second == 0);
-        
-        RequiredFields cogroupRelevantFields01 = cogroup.getRelevantInputs(0, 0).get(1);
-        assertTrue(cogroupRelevantFields01.getNeedAllFields() == false);
-        assertTrue(cogroupRelevantFields01.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields01.getFields().size() == 1);
-        assertTrue(cogroupRelevantFields01.getFields().get(0).first == 1);
-        assertTrue(cogroupRelevantFields01.getFields().get(0).second == 0);
-        
-        
-        assertTrue(cogroup.getRelevantInputs(0, 1).size() == 2);
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields1.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields1.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields1.getFields() == null);
-        assertTrue(cogroup.getRelevantInputs(0, 1).get(1) == null);
-        
-        RequiredFields cogroupRelevantFields2 = cogroup.getRelevantInputs(0, 2).get(1);
-        assertTrue(cogroupRelevantFields2.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields2.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields2.getFields() == null);
-        assertTrue(cogroup.getRelevantInputs(0, 2).get(0) == null);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().size() == 1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 1);
-        assertTrue(foreachRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields1.getFields().get(0).second == 1);
-        
-        RequiredFields foreachRelevantFields2 = foreach.getRelevantInputs(0, 2).get(0);
-        assertTrue(foreachRelevantFields2.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields2.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields2.getFields().size() == 1);
-        assertTrue(foreachRelevantFields2.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields2.getFields().get(0).second == 1);
-        
-        RequiredFields foreachRelevantFields3 = foreach.getRelevantInputs(0, 3).get(0);
-        assertTrue(foreachRelevantFields3.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields3.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields3.getFields().size() == 1);
-        assertTrue(foreachRelevantFields3.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields3.getFields().get(0).second == 2);
-        
-        RequiredFields foreachRelevantFields4 = foreach.getRelevantInputs(0, 4).get(0);
-        assertTrue(foreachRelevantFields4.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields4.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields4.getFields().size() == 1);
-        assertTrue(foreachRelevantFields4.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields4.getFields().get(0).second == 2);
-        
-        assertTrue(foreach.getRelevantInputs(0, 5) == null);
-    }
-    
-    @Test
-    public void testQueryCrossWithSchema() throws FrontendException {
-        String query = "c = cross (load 'a' as (a, b, c)), (load 'b' as (d, e, f));";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        //check cross required fields
-        LOCross cross = (LOCross)lp.getLeaves().get(0);
-        
-        RequiredFields crossRelevantFields0 = cross.getRelevantInputs(0, 0).get(0);
-        assertTrue(crossRelevantFields0.getNeedAllFields()==false);
-        assertTrue(crossRelevantFields0.getNeedNoFields()==false);
-        assertTrue(crossRelevantFields0.getFields().get(0).first==0);
-        assertTrue(crossRelevantFields0.getFields().get(0).second==0);
-        
-        assertTrue(cross.getRelevantInputs(0, 0).get(1)==null);
-        
-        RequiredFields crossRelevantFields1 = cross.getRelevantInputs(0, 1).get(0);
-        assertTrue(crossRelevantFields1.getNeedAllFields()==false);
-        assertTrue(crossRelevantFields1.getNeedNoFields()==false);
-        assertTrue(crossRelevantFields1.getFields().get(0).first==0);
-        assertTrue(crossRelevantFields1.getFields().get(0).second==1);
-        
-        assertTrue(cross.getRelevantInputs(0, 1).get(1)==null);
-        
-        RequiredFields crossRelevantFields2 = cross.getRelevantInputs(0, 2).get(0);
-        assertTrue(crossRelevantFields2.getNeedAllFields()==false);
-        assertTrue(crossRelevantFields2.getNeedNoFields()==false);
-        assertTrue(crossRelevantFields2.getFields().get(0).first==0);
-        assertTrue(crossRelevantFields2.getFields().get(0).second==2);
-        
-        assertTrue(cross.getRelevantInputs(0, 2).get(1)==null);
-        
-        RequiredFields crossRelevantFields3 = cross.getRelevantInputs(0, 3).get(1);
-        assertTrue(crossRelevantFields3.getNeedAllFields()==false);
-        assertTrue(crossRelevantFields3.getNeedNoFields()==false);
-        assertTrue(crossRelevantFields3.getFields().get(0).first==1);
-        assertTrue(crossRelevantFields3.getFields().get(0).second==0);
-        
-        assertTrue(cross.getRelevantInputs(0, 3).get(0)==null);
-        
-        RequiredFields crossRelevantFields4 = cross.getRelevantInputs(0, 4).get(1);
-        assertTrue(crossRelevantFields4.getNeedAllFields()==false);
-        assertTrue(crossRelevantFields4.getNeedNoFields()==false);
-        assertTrue(crossRelevantFields4.getFields().get(0).first==1);
-        assertTrue(crossRelevantFields4.getFields().get(0).second==1);
-        
-        assertTrue(cross.getRelevantInputs(0, 4).get(0)==null);
-        
-        RequiredFields crossRelevantFields5 = cross.getRelevantInputs(0, 5).get(1);
-        assertTrue(crossRelevantFields5.getNeedAllFields()==false);
-        assertTrue(crossRelevantFields5.getNeedAllFields()==false);
-        assertTrue(crossRelevantFields5.getFields().get(0).first==1);
-        assertTrue(crossRelevantFields5.getFields().get(0).second==2);
-        
-        assertTrue(cross.getRelevantInputs(0, 5).get(0)==null);
-    }
-    
-    @Test
-    public void testQueryUnionWithSchema() throws FrontendException {
-        String query = "c = union (load 'a' as (url, hitcount)), (load 'b' as (url, rank));";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOUnion union = (LOUnion)lp.getLeaves().get(0);
-        RequiredFields unionRelevantFields0 = union.getRelevantInputs(0, 0).get(0);
-        assertTrue(unionRelevantFields0.getNeedAllFields() == false);
-        assertTrue(unionRelevantFields0.getNeedNoFields() == false);
-        assertTrue(unionRelevantFields0.getFields().size() == 1);
-        assertTrue(unionRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields unionRelevantFields1 = union.getRelevantInputs(0, 0).get(1);
-        assertTrue(unionRelevantFields1.getNeedAllFields() == false);
-        assertTrue(unionRelevantFields1.getNeedNoFields() == false);
-        assertTrue(unionRelevantFields1.getFields().size() == 1);
-        assertTrue(unionRelevantFields1.getFields().contains(new Pair<Integer, Integer>(1, 0)));
-    }
-
-    @Test
-    public void testQueryFRJoinSchema() throws FrontendException {
-        String query = "c = join (load 'a' as (url, hitcount)) by $0, (load 'b' as (url, rank)) by $0 using \"replicated\";";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin frjoin = (LOJoin)lp.getLeaves().get(0);
-        RequiredFields frjoinRelevantFields0 = frjoin.getRelevantInputs(0, 0).get(0);
-        assertTrue(frjoinRelevantFields0.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields0.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields0.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(frjoinRelevantFields0.getFields().get(0).second == 0);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 0).get(1)==null);
-        
-        RequiredFields frjoinRelevantFields1 = frjoin.getRelevantInputs(0, 1).get(0);
-        assertTrue(frjoinRelevantFields1.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields1.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields1.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(frjoinRelevantFields1.getFields().get(0).second == 1);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 1).get(1)==null);
-        
-        RequiredFields frjoinRelevantFields2 = frjoin.getRelevantInputs(0, 2).get(1);
-        assertTrue(frjoinRelevantFields2.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields2.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields2.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields2.getFields().get(0).first == 1);
-        assertTrue(frjoinRelevantFields2.getFields().get(0).second == 0);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 2).get(0)==null);
-        
-        RequiredFields frjoinRelevantFields3 = frjoin.getRelevantInputs(0, 3).get(1);
-        assertTrue(frjoinRelevantFields3.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields3.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields3.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields3.getFields().get(0).first == 1);
-        assertTrue(frjoinRelevantFields3.getFields().get(0).second == 1);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 3).get(0)==null);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 4)==null);
-    }
-
-    @Test
-    public void testQueryJoinWithSchema() throws FrontendException {
-        String query = "c = join (load 'a' as (url, hitcount)) by $0, (load 'b' as (url, rank)) by $0;";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin join = (LOJoin)lp.getLeaves().get(0);
-        RequiredFields joinRelevantFields0 = join.getRelevantInputs(0, 0).get(0);
-        assertTrue(joinRelevantFields0.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields0.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields0.getFields().size() == 1);
-        assertTrue(joinRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(joinRelevantFields0.getFields().get(0).second == 0);
-        
-        assertTrue(join.getRelevantInputs(0, 0).get(1)==null);
-        
-        RequiredFields joinRelevantFields1 = join.getRelevantInputs(0, 1).get(0);
-        assertTrue(joinRelevantFields1.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields1.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields1.getFields().size() == 1);
-        assertTrue(joinRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(joinRelevantFields1.getFields().get(0).second == 1);
-        
-        assertTrue(join.getRelevantInputs(0, 1).get(1)==null);
-        
-        RequiredFields joinRelevantFields2 = join.getRelevantInputs(0, 2).get(1);
-        assertTrue(joinRelevantFields2.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields2.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields2.getFields().size() == 1);
-        assertTrue(joinRelevantFields2.getFields().get(0).first == 1);
-        assertTrue(joinRelevantFields2.getFields().get(0).second == 0);
-        
-        assertTrue(join.getRelevantInputs(0, 2).get(0)==null);
-        
-        RequiredFields joinRelevantFields3 = join.getRelevantInputs(0, 3).get(1);
-        assertTrue(joinRelevantFields3.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields3.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields3.getFields().size() == 1);
-        assertTrue(joinRelevantFields3.getFields().get(0).first == 1);
-        assertTrue(joinRelevantFields3.getFields().get(0).second == 1);
-        
-        assertTrue(join.getRelevantInputs(0, 3).get(0)==null);
-        
-        assertTrue(join.getRelevantInputs(0, 4)==null);
-    }
-    
-    @Test
-    public void testQueryCrossWithMixedSchema() throws FrontendException {
-        String query = "c = cross (load 'a' as (url, hitcount)), (load 'b');";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCross cross = (LOCross)lp.getLeaves().get(0);
-        assertTrue(cross.getRelevantInputs(0, 0)==null);
-    }
-
-    @Test
-    public void testQueryUnionWithMixedSchema() throws FrontendException {
-        String query = "c = union (load 'a' as (url, hitcount)), (load 'b');";
-        LogicalPlan lp = planTester.buildPlan(query);
-        LOUnion union = (LOUnion)lp.getLeaves().get(0);
-        
-        RequiredFields unionRelevantFields0 = union.getRelevantInputs(0, 0).get(0);
-        assertTrue(unionRelevantFields0.getNeedAllFields() == false);
-        assertTrue(unionRelevantFields0.getNeedNoFields() == false);
-        assertTrue(unionRelevantFields0.getFields().size() == 1);
-        assertTrue(unionRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields unionRelevantFields1 = union.getRelevantInputs(0, 0).get(1);
-        assertTrue(unionRelevantFields1.getNeedAllFields() == false);
-        assertTrue(unionRelevantFields1.getNeedNoFields() == false);
-        assertTrue(unionRelevantFields1.getFields().size() == 1);
-        assertTrue(unionRelevantFields1.getFields().contains(new Pair<Integer, Integer>(1, 0)));
-    }
-    
-    @Test
-    public void testQueryFRJoinWithMixedSchema() throws FrontendException {
-        String query = "c = join (load 'a' as (url, hitcount)) by $0, (load 'b') by $0 using \"replicated\";";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin frjoin = (LOJoin)lp.getLeaves().get(0);
-        assertTrue(frjoin.getRelevantInputs(0, 0)==null);
-    }
-    
-    @Test
-    public void testQueryJoinWithMixedSchema() throws FrontendException {
-        String query = "c = join (load 'a' as (url, hitcount)) by $0, (load 'b') by $0;";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin join = (LOJoin)lp.getLeaves().get(0);
-        assertTrue(join.getRelevantInputs(0, 0)==null);
-    }
-    
-    @Test
-    public void testQueryFilterWithStarNoSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a';");
-        LogicalPlan lp = planTester.buildPlan("b = filter a by COUNT(*) == 3;");
-        
-        LOFilter filter = (LOFilter)lp.getLeaves().get(0);
-        RequiredFields filterRelevantFields0 = filter.getRelevantInputs(0, 0).get(0);
-        assertTrue(filterRelevantFields0.getNeedAllFields() == false);
-        assertTrue(filterRelevantFields0.getNeedNoFields() == false);
-        assertTrue(filterRelevantFields0.getFields().size() == 1);
-        assertTrue(filterRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(filterRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields filterRelevantFields1 = filter.getRelevantInputs(0, 1).get(0);
-        assertTrue(filterRelevantFields1.getNeedAllFields() == false);
-        assertTrue(filterRelevantFields1.getNeedNoFields() == false);
-        assertTrue(filterRelevantFields1.getFields().size() == 1);
-        assertTrue(filterRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(filterRelevantFields1.getFields().get(0).second == 1);
-    }
-    
-    @Test
-    public void testQueryOrderByStarNoSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a';");
-        LogicalPlan lp = planTester.buildPlan("b = order a by *;");
-        
-        LOSort sort = (LOSort)lp.getLeaves().get(0);
-        RequiredFields sortRelevantFields0 = sort.getRelevantInputs(0, 0).get(0);
-        assertTrue(sortRelevantFields0.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields0.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields0.getFields().size() == 1);
-        assertTrue(sortRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(sortRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields sortRelevantFields1 = sort.getRelevantInputs(0, 1).get(0);
-        assertTrue(sortRelevantFields1.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields1.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields1.getFields().size() == 1);
-        assertTrue(sortRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(sortRelevantFields1.getFields().get(0).second == 1);
-    }
-    
-    @Test
-    public void testQueryGroupByStarNoSchema() throws FrontendException  {
-        String query = "foreach (group (load 'a') by *) generate $1 ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields cogroupRelevantFields0 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields0.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields0.getNeedNoFields() == false);
-        
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields1.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields1.getNeedNoFields() == false);
-        
-        LOForEach foreach = (LOForEach)lp.getSuccessors(cogroup).get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.needNoFields() == false);
-        assertTrue(foreachRelevantFields0.needAllFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().size() == 1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 1);
-        
-        assertTrue(foreach.getRelevantInputs(0, 1) == null);
-    }
-    
-    @Test
-    public void testQueryFRJoinOnStarNoSchema() throws FrontendException {
-        String query = "c = join (load 'a') by *, (load 'b') by * using \"replicated\";";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin frjoin = (LOJoin)lp.getLeaves().get(0);
-        assertTrue(frjoin.getRelevantInputs(0, 0) == null);
-    }
-    
-    @Test
-    public void testQueryJoinOnStarNoSchema() throws FrontendException {
-        String query = "c = join (load 'a') by *, (load 'b') by *;";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin join = (LOJoin)lp.getLeaves().get(0);
-        assertTrue(join.getRelevantInputs(0, 0) == null);
-    }
-    
-    @Test
-    public void testQueryFilterStarWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url,hitCount);");
-        LogicalPlan lp = planTester.buildPlan("b = filter a by COUNT(*) == 3;");
-        
-        LOFilter filter = (LOFilter)lp.getLeaves().get(0);
-        RequiredFields filterRelevantFields0 = filter.getRelevantInputs(0, 0).get(0);
-        assertTrue(filterRelevantFields0.getNeedAllFields() == false);
-        assertTrue(filterRelevantFields0.getNeedNoFields() == false);
-        assertTrue(filterRelevantFields0.getFields().size() == 1);
-        assertTrue(filterRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(filterRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields filterRelevantFields1 = filter.getRelevantInputs(0, 1).get(0);
-        assertTrue(filterRelevantFields1.getNeedAllFields() == false);
-        assertTrue(filterRelevantFields1.getNeedNoFields() == false);
-        assertTrue(filterRelevantFields1.getFields().size() == 1);
-        assertTrue(filterRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(filterRelevantFields1.getFields().get(0).second == 1);
-    }
-    
-    @Test
-    public void testQuerySplitWithStarSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url, hitCount);");
-        LogicalPlan lp = planTester.buildPlan("split a into b if url == '3', c if COUNT(*) == '3';");
-        
-        LOSplit split = (LOSplit)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields splitRelevantFields0 = split.getRelevantInputs(0, 0).get(0);
-        assertTrue(splitRelevantFields0.needAllFields() == false);
-        assertTrue(splitRelevantFields0.needNoFields() == false);
-        assertTrue(splitRelevantFields0.getFields().size() == 1);
-        assertTrue(splitRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields splitRelevantFields1 = split.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitRelevantFields1.needAllFields() == false);
-        assertTrue(splitRelevantFields1.needNoFields() == false);
-        assertTrue(splitRelevantFields1.getFields().size() == 1);
-        assertTrue(splitRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        
-        assertTrue(split.getRelevantInputs(0, 2) == null);
-
-        LOSplitOutput splitb = (LOSplitOutput)lp.getSuccessors(split).get(0);
-        RequiredFields splitbRelevantFields0 = splitb.getRelevantInputs(0, 0).get(0);
-        assertTrue(splitbRelevantFields0.getNeedAllFields() == false);
-        assertTrue(splitbRelevantFields0.getNeedNoFields() == false);
-        assertTrue(splitbRelevantFields0.getFields().size() == 1);
-        assertTrue(splitbRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(splitbRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields splitbRelevantFields1 = splitb.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitbRelevantFields1.getNeedAllFields() == false);
-        assertTrue(splitbRelevantFields1.getNeedNoFields() == false);
-        assertTrue(splitbRelevantFields1.getFields().size() == 1);
-        assertTrue(splitbRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        
-        LOSplitOutput splitc = (LOSplitOutput)lp.getSuccessors(split).get(1);
-        RequiredFields splitcRelevantFields0 = splitc.getRelevantInputs(0, 0).get(0);
-        assertTrue(splitcRelevantFields0.getNeedAllFields() == false);
-        assertTrue(splitcRelevantFields0.getNeedNoFields() == false);
-        assertTrue(splitcRelevantFields0.getFields().size() == 1);
-        assertTrue(splitcRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields splitcRelevantFields1 = splitc.getRelevantInputs(0, 1).get(0);
-        assertTrue(splitcRelevantFields1.getNeedAllFields() == false);
-        assertTrue(splitcRelevantFields1.getNeedNoFields() == false);
-        assertTrue(splitcRelevantFields1.getFields().size() == 1);
-        assertTrue(splitcRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-    }
-    
-    @Test
-    public void testQueryOrderByStarWithSchema() throws FrontendException {
-        planTester.buildPlan("a = load 'a' as (url,hitCount);");
-        LogicalPlan lp = planTester.buildPlan("b = order a by *;");
-        
-        LOSort sort = (LOSort)lp.getLeaves().get(0);
-        RequiredFields sortRelevantFields0 = sort.getRelevantInputs(0, 0).get(0);
-        assertTrue(sortRelevantFields0.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields0.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields0.getFields().size() == 1);
-        assertTrue(sortRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        
-        RequiredFields sortRelevantFields1 = sort.getRelevantInputs(0, 1).get(0);
-        assertTrue(sortRelevantFields1.getNeedAllFields() == false);
-        assertTrue(sortRelevantFields1.getNeedNoFields() == false);
-        assertTrue(sortRelevantFields1.getFields().size() == 1);
-        assertTrue(sortRelevantFields1.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-    }
-    
-    @Test
-    public void testQueryGroupByStarWithSchema() throws FrontendException {
-        String query = "foreach (group (load 'a' as (url, hitCount)) by *) generate $1 ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOCogroup cogroup = (LOCogroup)lp.getSuccessors(lp.getRoots().get(0)).get(0);
-        RequiredFields cogroupRelevantFields0 = cogroup.getRelevantInputs(0, 0).get(0);
-        assertTrue(cogroupRelevantFields0.getNeedAllFields() == false);
-        assertTrue(cogroupRelevantFields0.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields0.getFields().size() == 2);
-        assertTrue(cogroupRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 0)));
-        assertTrue(cogroupRelevantFields0.getFields().contains(new Pair<Integer, Integer>(0, 1)));
-        
-        RequiredFields cogroupRelevantFields1 = cogroup.getRelevantInputs(0, 1).get(0);
-        assertTrue(cogroupRelevantFields1.getNeedAllFields() == true);
-        assertTrue(cogroupRelevantFields1.getNeedNoFields() == false);
-        assertTrue(cogroupRelevantFields1.getFields() == null);
-        
-        assertTrue(cogroup.getRelevantInputs(0, 2) == null);
-        
-        LOForEach foreach = (LOForEach)lp.getSuccessors(cogroup).get(0);
-        RequiredFields forEachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(forEachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(forEachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(forEachRelevantFields0.getFields().size() == 1);
-        assertTrue(forEachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(forEachRelevantFields0.getFields().get(0).second == 1);
-        
-        assertTrue(foreach.getRelevantInputs(0, 1) == null);
-    }
-    
-    @Test
-    public void testQueryFRJoinOnStarWithSchema() throws FrontendException {
-        String query = "c = join (load 'a' as (url, hitcount)) by *, (load 'b' as (url, rank)) by * using \"replicated\";";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin frjoin = (LOJoin)lp.getLeaves().get(0);
-        RequiredFields frjoinRelevantFields0 = frjoin.getRelevantInputs(0, 0).get(0);
-        assertTrue(frjoinRelevantFields0.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields0.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields0.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(frjoinRelevantFields0.getFields().get(0).second == 0);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 0).get(1)==null);
-        
-        RequiredFields frjoinRelevantFields1 = frjoin.getRelevantInputs(0, 1).get(0);
-        assertTrue(frjoinRelevantFields1.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields1.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields1.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(frjoinRelevantFields1.getFields().get(0).second == 1);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 1).get(1)==null);
-        
-        RequiredFields frjoinRelevantFields2 = frjoin.getRelevantInputs(0, 2).get(1);
-        assertTrue(frjoinRelevantFields2.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields2.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields2.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields2.getFields().get(0).first == 1);
-        assertTrue(frjoinRelevantFields2.getFields().get(0).second == 0);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 2).get(0)==null);
-        
-        RequiredFields frjoinRelevantFields3 = frjoin.getRelevantInputs(0, 3).get(1);
-        assertTrue(frjoinRelevantFields3.getNeedAllFields() == false);
-        assertTrue(frjoinRelevantFields3.getNeedNoFields() == false);
-        assertTrue(frjoinRelevantFields3.getFields().size() == 1);
-        assertTrue(frjoinRelevantFields3.getFields().get(0).first == 1);
-        assertTrue(frjoinRelevantFields3.getFields().get(0).second == 1);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 3).get(0)==null);
-        
-        assertTrue(frjoin.getRelevantInputs(0, 4)==null);
-    }
-
-    @Test
-    public void testQueryJoinOnStarWithSchema() throws FrontendException {
-        String query = "c = join (load 'a' as (url, hitcount)) by *, (load 'b' as (url, rank)) by *;";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOJoin join = (LOJoin)lp.getLeaves().get(0);
-        RequiredFields joinRelevantFields0 = join.getRelevantInputs(0, 0).get(0);
-        assertTrue(joinRelevantFields0.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields0.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields0.getFields().size() == 1);
-        assertTrue(joinRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(joinRelevantFields0.getFields().get(0).second == 0);
-        
-        assertTrue(join.getRelevantInputs(0, 0).get(1)==null);
-        
-        RequiredFields joinRelevantFields1 = join.getRelevantInputs(0, 1).get(0);
-        assertTrue(joinRelevantFields1.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields1.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields1.getFields().size() == 1);
-        assertTrue(joinRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(joinRelevantFields1.getFields().get(0).second == 1);
-        
-        assertTrue(join.getRelevantInputs(0, 1).get(1)==null);
-        
-        RequiredFields joinRelevantFields2 = join.getRelevantInputs(0, 2).get(1);
-        assertTrue(joinRelevantFields2.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields2.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields2.getFields().size() == 1);
-        assertTrue(joinRelevantFields2.getFields().get(0).first == 1);
-        assertTrue(joinRelevantFields2.getFields().get(0).second == 0);
-        
-        assertTrue(join.getRelevantInputs(0, 2).get(0)==null);
-        
-        RequiredFields joinRelevantFields3 = join.getRelevantInputs(0, 3).get(1);
-        assertTrue(joinRelevantFields3.getNeedAllFields() == false);
-        assertTrue(joinRelevantFields3.getNeedNoFields() == false);
-        assertTrue(joinRelevantFields3.getFields().size() == 1);
-        assertTrue(joinRelevantFields3.getFields().get(0).first == 1);
-        assertTrue(joinRelevantFields3.getFields().get(0).second == 1);
-        
-        assertTrue(join.getRelevantInputs(0, 3).get(0)==null);
-        
-        assertTrue(join.getRelevantInputs(0, 4)==null);
-    }
-    
-    @Test
-    public void testQueryForeachGenerateStarNoSchema() throws FrontendException {
-        String query = "foreach (load 'a') generate * ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        assertTrue(foreach.getRelevantInputs(0, 0) == null);
-    }
-    
-    @Test
-    public void testQueryForeachGenerateCountStarNoSchema() throws FrontendException {
-        String query = "foreach (load 'a') generate COUNT(*) ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields.getNeedAllFields() == true);
-        assertTrue(foreachRelevantFields.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields.getFields() == null);
-    }
-    
-    @Test
-    public void testQueryForeachGenerateStarNoSchema1() throws FrontendException {
-        String query = "foreach (load 'a') generate *, COUNT(*) ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        assertTrue(foreach.getRelevantInputs(0, 0) == null);
-        assertTrue(foreach.getRelevantInputs(0, 1) == null);
-    }
-    
-    @Test
-    public void testQueryForeachGenerateStarNoSchema2() throws FrontendException {
-        String query = "foreach (load 'a') generate *, $0 ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        assertTrue(foreach.getRelevantInputs(0, 0) == null);
-        assertTrue(foreach.getRelevantInputs(0, 1) == null);
-    }
-    
-    @Test
-    public void testQueryForeachGenerateStarWithSchema() throws FrontendException {
-        String query = "foreach (load 'a' as (url, hitCount)) generate * ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().size() == 1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 1);
-        assertTrue(foreachRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields1.getFields().get(0).second == 1);
-        
-        assertTrue(foreach.getRelevantInputs(0, 2)==null);
-    }
-
-    @Test
-    public void testQueryForeachGenerateCountStarWithSchema() throws FrontendException {
-        String query = "foreach (load 'a' as (url, hitCount)) generate COUNT(*) ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields.getNeedAllFields() == true);
-        assertTrue(foreachRelevantFields.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields.getFields() == null);
-    }
-
-    @Test
-    public void testQueryForeachGenerateStarWithSchema1() throws FrontendException {
-        String query = "foreach (load 'a' as (url, hitCount)) generate *, COUNT(*) ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-        
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().size() == 1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 1);
-        assertTrue(foreachRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields1.getFields().get(0).second == 1);
-        
-        RequiredFields foreachRelevantFields2 = foreach.getRelevantInputs(0, 2).get(0);
-        assertTrue(foreachRelevantFields2.getNeedAllFields() == true);
-        assertTrue(foreachRelevantFields2.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields2.getFields() == null);
-    }
-
-    @Test
-    public void testQueryForeachGenerateStarWithSchema2() throws FrontendException {
-        String query = "foreach (load 'a' as (url, hitCount)) generate *, url ;";
-        LogicalPlan lp = planTester.buildPlan(query);
-
-        LOForEach foreach = (LOForEach)lp.getLeaves().get(0);
-        RequiredFields foreachRelevantFields0 = foreach.getRelevantInputs(0, 0).get(0);
-        assertTrue(foreachRelevantFields0.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields0.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields0.getFields().size() == 1);
-        assertTrue(foreachRelevantFields0.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields0.getFields().get(0).second == 0);
-        
-        RequiredFields foreachRelevantFields1 = foreach.getRelevantInputs(0, 1).get(0);
-        assertTrue(foreachRelevantFields1.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields1.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields1.getFields().size() == 1);
-        assertTrue(foreachRelevantFields1.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields1.getFields().get(0).second == 1);
-        
-        RequiredFields foreachRelevantFields2 = foreach.getRelevantInputs(0, 2).get(0);
-        assertTrue(foreachRelevantFields2.getNeedAllFields() == false);
-        assertTrue(foreachRelevantFields2.getNeedNoFields() == false);
-        assertTrue(foreachRelevantFields2.getFields().size() == 1);
-        assertTrue(foreachRelevantFields2.getFields().get(0).first == 0);
-        assertTrue(foreachRelevantFields2.getFields().get(0).second == 0);
-    }
-}
-
-