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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1146) Inconsistent column pruning in LOUnion
Date Thu, 24 Dec 2009 11:10:29 GMT

    [ https://issues.apache.org/jira/browse/PIG-1146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12794383#action_12794383
] 

Hadoop QA commented on PIG-1146:
--------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12428868/PIG-1146-2.patch
  against trunk revision 893660.

    +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/158/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/158/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/158/console

This message is automatically generated.

> Inconsistent column pruning in LOUnion
> --------------------------------------
>
>                 Key: PIG-1146
>                 URL: https://issues.apache.org/jira/browse/PIG-1146
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.6.0
>            Reporter: Daniel Dai
>            Assignee: Daniel Dai
>             Fix For: 0.7.0
>
>         Attachments: PIG-1146-1.patch, PIG-1146-2.patch
>
>
> This happens when we do a union on two relations, if one column comes from a loader,
the other matching column comes from a constant, and this column get pruned. We prune for
the one from loader and did not prune the constant. Thus leaves union an inconsistent state.
Here is a script:
> {code}
> a = load '1.txt' as (a0, a1:chararray, a2);
> b = load '2.txt' as (b0, b2);
> c = foreach b generate b0, 'hello', b2;
> d = union a, c;
> e = foreach d generate $0, $2;
> dump e;
> {code}
> 1.txt: 
> {code}
> ulysses thompson        64      1.90
> katie carson    25      3.65
> {code}
> 2.txt:
> {code}
> luke king       0.73
> holly davidson  2.43
> {code}
> expected output:
> (ulysses thompson,1.90)
> (katie carson,3.65)
> (luke king,0.73)
> (holly davidson,2.43)
> real output:
> (ulysses thompson,)
> (katie carson,)
> (luke king,0.73)
> (holly davidson,2.43)

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