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Posted to issues@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2015/09/18 06:54:04 UTC

[jira] [Updated] (HIVE-10785) Support aggregate push down through joins

     [ https://issues.apache.org/jira/browse/HIVE-10785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan updated HIVE-10785:
------------------------------------
    Component/s: Logical Optimizer
                 CBO

> 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.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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