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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-15227) Optimize join + gby into semijoin
Date Wed, 30 Nov 2016 21:32:58 GMT

     [ https://issues.apache.org/jira/browse/HIVE-15227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Chauhan updated HIVE-15227:
------------------------------------
       Resolution: Fixed
    Fix Version/s: 2.2.0
           Status: Resolved  (was: Patch Available)

> Optimize join + gby into semijoin
> ---------------------------------
>
>                 Key: HIVE-15227
>                 URL: https://issues.apache.org/jira/browse/HIVE-15227
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>             Fix For: 2.2.0
>
>         Attachments: HIVE-15227.2.patch, HIVE-15227.3.patch, HIVE-15227.4.patch, HIVE-15227.patch
>
>
> Calcite has a rule which can do this transformation. Lets take advantage of this since
Hive has native Left semi join operator.



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