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Posted to issues@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2017/09/01 17:52:00 UTC

[jira] [Updated] (HIVE-17399) Semijoin: Do not remove semijoin branch if it feeds to TS->DPP_EVENT

     [ https://issues.apache.org/jira/browse/HIVE-17399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gopal V updated HIVE-17399:
---------------------------
    Summary: Semijoin: Do not remove semijoin branch if it feeds to TS->DPP_EVENT  (was: Do not remove semijoin branch if it feeds to TS->DPP_EVENT)

> Semijoin: Do not remove semijoin branch if it feeds to TS->DPP_EVENT
> --------------------------------------------------------------------
>
>                 Key: HIVE-17399
>                 URL: https://issues.apache.org/jira/browse/HIVE-17399
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Deepak Jaiswal
>            Assignee: Deepak Jaiswal
>         Attachments: HIVE-17399.1.patch, HIVE-17399.2.patch, HIVE-17399.3.patch, HIVE-17399.4.patch
>
>
> If there is an incoming semijoin branch to a TS which has DPP event, then try to keep it as it may serve as an excellent filter for DPP thus reducing the input to join drastically.



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