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From "Deepak Jaiswal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16260) Remove parallel edges of semijoin with map joins.
Date Fri, 24 Mar 2017 22:00:43 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15941226#comment-15941226
] 

Deepak Jaiswal commented on HIVE-16260:
---------------------------------------

I don't have write access to the wiki. Either I need that or someone else has to update the
documentation.

> Remove parallel edges of semijoin with map joins.
> -------------------------------------------------
>
>                 Key: HIVE-16260
>                 URL: https://issues.apache.org/jira/browse/HIVE-16260
>             Project: Hive
>          Issue Type: Task
>            Reporter: Deepak Jaiswal
>            Assignee: Deepak Jaiswal
>              Labels: TODOC2.2
>             Fix For: 2.2.0
>
>         Attachments: HIVE-16260.1.patch, HIVE-16260.2.patch, HIVE-16260.3.patch, HIVE-16260.4.patch,
HIVE-16260.5.patch
>
>
> Remove parallel edges of semijoin with map joins as they don't give any benefit to the
query.
> Also, ensure that bloom filters are created to handle at least 1M entries and the semijoin
is disabled if the big table has less than 1M rows.
> Both these features are configurable.



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