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https://issues.apache.org/jira/browse/PIG-2536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456519#comment-13456519
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Dmitriy V. Ryaboy commented on PIG-2536:
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Jon how do you feel about this one?
> Extend pig to support DISTINCT x.(project)
> ------------------------------------------
>
> Key: PIG-2536
> URL: https://issues.apache.org/jira/browse/PIG-2536
> Project: Pig
> Issue Type: Improvement
> Reporter: Jonathan Coveney
> Assignee: Jonathan Coveney
> Priority: Minor
> Fix For: 0.11
>
> Attachments: PIG-2436-0.patch
>
>
> Currently, pig does not allow this syntax:
> {code}
> A = load 'thing' (x:int, y:int, z:int);
> B = distinct A.x;
> C = distinct A.(y,z)
> D = distinct C.$0;
> {code}
> and so on. With this patch, it does. I should probably add more tests, though
> it's a simple patch... it just turns distinct rel.proj into syntactic sugar
> for distinct (foreach rel generate proj)
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