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From "Rohini Palaniswamy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-4406) Splits prevent optimized joins/groups
Date Mon, 02 Feb 2015 22:38:35 GMT

    [ https://issues.apache.org/jira/browse/PIG-4406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14302076#comment-14302076
] 

Rohini Palaniswamy commented on PIG-4406:
-----------------------------------------

[~brian@brianjohnson.cc],
    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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