[jira] [Updated] (PIG-2631) Pig should allow self joins

["Daniel Dai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-2631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Dai updated PIG-2631:
----------------------------
    Fix Version/s:     (was: 0.15.0)
                   0.16.0

> Pig should allow self joins
> ---------------------------
>
>                 Key: PIG-2631
>                 URL: https://issues.apache.org/jira/browse/PIG-2631
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Jonathan Coveney
>             Fix For: 0.16.0
>
>
> This doesn't have to even be optimized, and can still involve a double scan of the data, but there is no reason the following should work:
> {code}
> a = load 'thing' as (x:int);
> b = join a by x, (foreach a generate *) by x;
> {code}
> but this does not:
> {code}
> a = load 'thing' as (x:int);
> b = join a by x, a by x;
> {code}



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