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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1022) optimizer pushes filter before the foreach that generates column used by filter
Date Wed, 21 Oct 2009 07:27:59 GMT

    [ https://issues.apache.org/jira/browse/PIG-1022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768120#action_12768120
] 

Hadoop QA commented on PIG-1022:
--------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12422754/PIG-1022-1.patch
  against trunk revision 827829.

    +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-h7.grid.sp2.yahoo.net/104/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/104/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/104/console

This message is automatically generated.

> optimizer pushes filter before the foreach that generates column used by filter
> -------------------------------------------------------------------------------
>
>                 Key: PIG-1022
>                 URL: https://issues.apache.org/jira/browse/PIG-1022
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.4.0
>            Reporter: Thejas M Nair
>            Assignee: Daniel Dai
>             Fix For: 0.6.0
>
>         Attachments: PIG-1022-1.patch
>
>
> grunt> l = load 'students.txt' using PigStorage() as (name:chararray, gender:chararray,
age:chararray, score:chararray);
> grunt> f = foreach l generate name, gender, age,score, '200'  as gid:chararray;
> grunt> g = group f by (name, gid);
> grunt> f2 = foreach g generate group.name as name: chararray, group.gid as gid: chararray;
> grunt> filt = filter f2 by gid == '200';
> grunt> explain filt;
> In the plan generated filt is pushed up after the load and before the first foreach,
even though the filter is on gid which is generated in first foreach.

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