[jira] [Commented] (PIG-3000) Optimize nested foreach

["Mona Chitnis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947434#comment-13947434 ] 

Mona Chitnis commented on PIG-3000:
-----------------------------------

[~daijy] Daniel Dai, can you please review the patch on reviewboard (revision 4)? https://reviews.apache.org/r/17376/diff/4/

I have described the stage I've reached with it.
thanks

> Optimize nested foreach
> -----------------------
>
>                 Key: PIG-3000
>                 URL: https://issues.apache.org/jira/browse/PIG-3000
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.10.0
>            Reporter: Richard Ding
>            Assignee: Mona Chitnis
>         Attachments: unit_tests.patch
>
>
> In this Pig script:
> {code}
> A = load 'data' as (a:chararray);
> B = foreach A { c = UPPER(a); generate ((c eq 'TEST') ? 1 : 0), ((c eq 'DEV') ? 1 : 0); }
> {code}
> The Eval function UPPER is called twice for each record.
> This should be optimized so that the UPPER is called only once for each record



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