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https://issues.apache.org/jira/browse/PIG-4858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15493280#comment-15493280
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Xianda Ke commented on PIG-4858:
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design doc is attached. refer to it for details.

> Implement Skewed join for spark engine
> --------------------------------------
>
>                 Key: PIG-4858
>                 URL: https://issues.apache.org/jira/browse/PIG-4858
>             Project: Pig
>          Issue Type: Sub-task
>          Components: spark
>            Reporter: liyunzhang_intel
>            Assignee: Xianda Ke
>             Fix For: spark-branch
>
>         Attachments: PIG-4858.patch, SkewedJoinInSparkMode.pdf
>
>
> Now we use regular join to replace skewed join. Need implement it 



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