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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1171) Top-N queries produce incorrect results when followed by a cross statement
Date Fri, 25 Dec 2009 00:51:29 GMT

    [ https://issues.apache.org/jira/browse/PIG-1171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12794526#action_12794526
] 

Hadoop QA commented on PIG-1171:
--------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12428922/PIG-1171.patch
  against trunk revision 893785.

    +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/161/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/161/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/161/console

This message is automatically generated.

> Top-N queries produce incorrect results when followed by a cross statement
> --------------------------------------------------------------------------
>
>                 Key: PIG-1171
>                 URL: https://issues.apache.org/jira/browse/PIG-1171
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Richard Ding
>            Assignee: Richard Ding
>         Attachments: PIG-1171.patch
>
>
> ??I am not sure if this is a bug, or something more subtle, but here is the problem that
I am having.??
> ??When I LOAD a dataset, change it with an ORDER, LIMIT it, then CROSS it with itself,
the results are not correct. I expect to see the cross of the limited, ordered dataset, but
instead I see the cross of the limited dataset. Effectively, its like the LIMIT is being excluded.??
> ??Example code follows:??
> {code}
> A = load 'foo' as (f1:int, f2:int, f3:int); B = load 'foo' as (f1:int, f2:int, f3:int);
> a = ORDER A BY f1 DESC;
> b = ORDER B BY f1 DESC;
> aa = LIMIT a 1;
> bb = LIMIT b 1;
> C = CROSS aa, bb;
> DUMP C;
> {code}

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