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https://issues.apache.org/jira/browse/PIG-4406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14302076#comment-14302076
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Rohini Palaniswamy commented on PIG-4406:
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[[email protected]],
Can you elaborate more on the cases with example scripts? I know that the
SecondaryKeyOptimizer is turned off with a split making order by in a nested
foreach after group by inefficient. But what is the join case you are talking
about?
> Splits prevent optimized joins/groups
> -------------------------------------
>
> Key: PIG-4406
> URL: https://issues.apache.org/jira/browse/PIG-4406
> Project: Pig
> Issue Type: Bug
> Reporter: Brian Johnson
>
> If you have either an explicit or plan generated split you can't do any
> optimized joins or groups because it sees the split as the loader instead of
> the actual loader
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