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https://issues.apache.org/jira/browse/PIG-3743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948182#comment-13948182
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Rohini Palaniswamy commented on PIG-3743:
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bq. A simple alternative is to set value to null in POLR and let
POGroupInputTez retrieve key.
POLR adds lot of overhead while processing tuple. POValueOuputTez does no
processing and just passes it through which will be more efficient.
> Use VertexGroup and Alias vertex for union
> ------------------------------------------
>
> Key: PIG-3743
> URL: https://issues.apache.org/jira/browse/PIG-3743
> Project: Pig
> Issue Type: Sub-task
> Components: tez
> Reporter: Rohini Palaniswamy
> Assignee: Cheolsoo Park
> Fix For: tez-branch
>
> Attachments: PIG-3743-1.patch, PIG-3743-2.patch,
> PIG-3743-fix-skew.patch
>
>
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