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Date: Mon, 25 Jan 2010 08:59:34 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: pig-dev@hadoop.apache.org
Subject: [jira] Commented: (PIG-1184) PruneColumns optimization does not
 handle the case of foreach flatten correctly if flattened bag is not used
 later
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    [ https://issues.apache.org/jira/browse/PIG-1184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12804449#action_12804449 ] 

Hadoop QA commented on PIG-1184:
--------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12431277/PIG-1184-2.patch
  against trunk revision 902253.

    +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/189/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/189/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/189/console

This message is automatically generated.

> PruneColumns optimization does not handle the case of foreach flatten correctly if flattened bag is not used later
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: PIG-1184
>                 URL: https://issues.apache.org/jira/browse/PIG-1184
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.6.0
>            Reporter: Pradeep Kamath
>            Assignee: Daniel Dai
>             Fix For: 0.7.0
>
>         Attachments: PIG-1184-1.patch, PIG-1184-2.patch
>
>
> The following script :
> {noformat}
> -e "a = load 'input.txt' as (f1:chararray, f2:chararray, f3:bag{t:tuple(id:chararray)}, f4:bag{t:tuple(loc:chararray)}); b = foreach a generate f1, f2, flatten(f3), flatten(f4), 10; b = foreach b generate f1, f2, \$4; dump b;"
> {noformat}
> gives the following result:
> (oiue,M,10)
> {noformat}
> cat input.txt:
> oiue    M       {(3),(4)}       {(toronto),(montreal)}
> {noformat}
> If PruneColumns optimizations is disabled, we get the right result:
> (oiue,M,10)
> (oiue,M,10)
> (oiue,M,10)
> (oiue,M,10)
> The flatten results in 4 records - so the output should contain 4 records.

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