[jira] Updated: (PIG-935) Skewed join throws an exception when used with map keys

["Sriranjan Manjunath (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sriranjan Manjunath updated PIG-935:
------------------------------------

    Attachment: skjoinmapbug.patch

> Skewed join throws an exception when used with map keys
> -------------------------------------------------------
>
>                 Key: PIG-935
>                 URL: https://issues.apache.org/jira/browse/PIG-935
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Sriranjan Manjunath
>         Attachments: skjoinmapbug.patch
>
>
> Skewed join throws a runtime exception for the following query:
> A = load 'map.txt' as (e);
> B = load 'map.txt' as (f);
> C = join A by (chararray)e#'a', B by (chararray)f#'a' using "skewed";
> explain C;
> Exception:
> Caused by: java.lang.ClassCastException: org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast cannot be cast to org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.PO
> Project
>         at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler.getSortCols(MRCompiler.java:1492)
>         at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler.getSamplingJob(MRCompiler.java:1894)
>         ... 27 more

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