[jira] [Commented] (PIG-3727) Fix split + skewed join

["Rohini Palaniswamy (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-3727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13902923#comment-13902923 ] 

Rohini Palaniswamy commented on PIG-3727:
-----------------------------------------

Handling the optimizations in PIG-3766. Will use this jira just to fix the self join after PIG-3757 goes in as it changes the way splits are handled. 

> Fix split + skewed join
> -----------------------
>
>                 Key: PIG-3727
>                 URL: https://issues.apache.org/jira/browse/PIG-3727
>             Project: Pig
>          Issue Type: Sub-task
>          Components: tez
>    Affects Versions: tez-branch
>            Reporter: Cheolsoo Park
>            Assignee: Rohini Palaniswamy
>             Fix For: tez-branch
>
>
> The e2e SkewedJoin_6 test runs the following query-
> {code}
> a = load ':INPATH:/singlefile/studenttab10k';
> b = filter a by $1 > 25;
> c = join a by $0, b by $0 using 'skewed' parallel 7;
> store c into ':OUTPATH:';
> {code}
> Currently, this fails with a compilation error in TezCompiler. Basically, visitSkewedJoin() doesn't handle the POSplit that is inserted between load and join.



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