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From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-10785) Support aggregate push down through joins
Date Thu, 24 Sep 2015 20:13:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14906922#comment-14906922
] 

Jesus Camacho Rodriguez commented on HIVE-10785:
------------------------------------------------

+1 (pending QA)

> Support aggregate push down through joins
> -----------------------------------------
>
>                 Key: HIVE-10785
>                 URL: https://issues.apache.org/jira/browse/HIVE-10785
>             Project: Hive
>          Issue Type: Bug
>          Components: CBO, Logical Optimizer
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Ashutosh Chauhan
>         Attachments: HIVE-10785.2.patch, HIVE-10785.3.patch, HIVE-10785.4.patch, HIVE-10785.5.patch,
HIVE-10785.6.patch, HIVE-10785.patch
>
>
> Enable {{AggregateJoinTransposeRule}} in CBO that pushes Aggregate through Join operators.
The rule has been extended in Calcite 1.4 to cover complex cases e.g. Aggregate operators
comprising UDAF. The decision on whether to push the Aggregate through Join or not should
be cost-driven.



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