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https://issues.apache.org/jira/browse/PIG-1113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784515#action_12784515
]
Hadoop QA commented on PIG-1113:
--------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12426566/PIG-1113.patch
against trunk revision 885858.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/71/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/71/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/71/console
This message is automatically generated.
> Diamond query optimization throws error in JOIN
> -----------------------------------------------
>
> Key: PIG-1113
> URL: https://issues.apache.org/jira/browse/PIG-1113
> Project: Pig
> Issue Type: Bug
> Reporter: Ankur
> Assignee: Richard Ding
> Fix For: 0.6.0
>
> Attachments: PIG-1113.patch
>
>
> The following script results in 1 M/R job as a result of diamond query
> optimization but the script fails.
> set1 = LOAD 'set1' USING PigStorage as (a:chararray, b:chararray,
> c:chararray);
> set2 = LOAD 'set2' USING PigStorage as (a: chararray, b:chararray, c:bag{});
> set2_1 = FOREACH set2 GENERATE a as f1, b as f2, (chararray) 0 as f3;
> set2_2 = FOREACH set2 GENERATE a as f1, FLATTEN((IsEmpty(c) ? null : c)) as
> f2, (chararray) 1 as f3;
> all_set2 = UNION set2_1, set2_2;
> joined_sets = JOIN set1 BY (a,b), all_set2 BY (f2,f3);
> dump joined_sets;
> And here is the error
> org.apache.pig.backend.executionengine.ExecException: ERROR 1071: Cannot
> convert a bag to a String
> at org.apache.pig.data.DataType.toString(DataType.java:739)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast.getNext(POCast.java:625)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:364)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:288)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:260)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNext(POLocalRearrange.java:256)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POUnion.getNext(POUnion.java:162)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:247)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:238)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.map(PigMapReduce.java:93)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
> at org.apache.hadoop.mapred.Child.main(Child.java:159)
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