[jira] Updated: (PIG-1022) optimizer pushes filter before the foreach that generates column used by filter

["Alan Gates (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-1022?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan Gates updated PIG-1022:
----------------------------

       Resolution: Fixed
    Fix Version/s:     (was: 0.6.0)
                   0.7.0
           Status: Resolved  (was: Patch Available)

Checked that patch in for Daniel since I'd already applied it and tested it.

> 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: 0.7.0
>
>         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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