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https://issues.apache.org/jira/browse/PIG-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13951028#comment-13951028
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Mona Chitnis commented on PIG-3000:
-----------------------------------
Updated rev-5 on RB:
Working code for simple case - nested foreach userfunc loading single argument
and generate operating on same argument.
commented out code is to make it work for complex cases
1. multiple arguments
2. userfunc having a subset of generate arguments - how to pass through from
initial load to initial foreach
> 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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