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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-877) Push up filter does not account for added columns in foreach
Date Fri, 10 Jul 2009 02:32:14 GMT

    [ https://issues.apache.org/jira/browse/PIG-877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12729498#action_12729498
] 

Hadoop QA commented on PIG-877:
-------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12413068/PIG-877.patch
  against trunk revision 792663.

    +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 failed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Pig-Patch-minerva.apache.org/120/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-minerva.apache.org/120/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-minerva.apache.org/120/console

This message is automatically generated.

> Push up filter does not account for added columns in foreach
> ------------------------------------------------------------
>
>                 Key: PIG-877
>                 URL: https://issues.apache.org/jira/browse/PIG-877
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.3.1
>            Reporter: Santhosh Srinivasan
>            Assignee: Santhosh Srinivasan
>             Fix For: 0.3.1
>
>         Attachments: PIG-877.patch
>
>
> If a filter follows a foreach that produces an added column then push up filter fails
with a null pointer exception.
> {code}
> ...
> x = foreach w generate $0, COUNT($1);
> y = filter x by $1 > 10;
> {code}
> In the above example, the column in the filter's expression is an added column. As a
result, the optimizer rule is not able to map it back to the input resulting in a null value.
The subsequent for loop is failing due to NPE.

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