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Posted to issues@hive.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2017/07/26 00:03:09 UTC

[jira] [Closed] (HIVE-15227) Optimize join + gby into semijoin

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

Owen O'Malley closed HIVE-15227.
--------------------------------

> 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
>              Labels: TODOC2.2
>             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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