[jira] [Commented] (HIVE-8647) HIVE-8186 causes addition of same child operator multiple times

["Gunther Hagleitner (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-8647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188707#comment-14188707 ] 

Gunther Hagleitner commented on HIVE-8647:
------------------------------------------

+1 for both branches.

> HIVE-8186 causes addition of same child operator multiple times
> ---------------------------------------------------------------
>
>                 Key: HIVE-8647
>                 URL: https://issues.apache.org/jira/browse/HIVE-8647
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.14.0
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>            Priority: Critical
>             Fix For: 0.14.0
>
>         Attachments: HIVE-8647.1.patch
>
>
> With HIVE-8186, the same child operator ends up getting added multiple times to the map operator when processing multiple files for the same alias in the map task. 
> I believe we should also eliminate having so many mapOpCtx for the same child operator and instead should have only 1 per alias. However, that looks like a big change that may not be needed before 0.14 goes out.



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