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https://issues.apache.org/jira/browse/PIG-4422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14365101#comment-14365101
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Praveen Rachabattuni commented on PIG-4422:
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Thats right [~kellyzly], but in the current implementation regular join has
been implemented which has same result data as of merge join. We could have the
original merge join implementation as a follow up jira.
> Implement visitMergeJoin in SparkCompiler
> -----------------------------------------
>
> Key: PIG-4422
> URL: https://issues.apache.org/jira/browse/PIG-4422
> Project: Pig
> Issue Type: Sub-task
> Components: spark
> Reporter: liyunzhang_intel
> Assignee: Praveen Rachabattuni
> Fix For: spark-branch
>
>
> in PIG-4374_6.patch. SparkCompiler#visitMergeJoin is marked "TODO"
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