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From "Jason Dere (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16441) De-duplicate semijoin branches in n-way joins
Date Thu, 20 Apr 2017 21:55:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15977623#comment-15977623
] 

Jason Dere commented on HIVE-16441:
-----------------------------------

I think this looks good.
+1 pending tests

> De-duplicate semijoin branches in n-way joins
> ---------------------------------------------
>
>                 Key: HIVE-16441
>                 URL: https://issues.apache.org/jira/browse/HIVE-16441
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Deepak Jaiswal
>            Assignee: Deepak Jaiswal
>         Attachments: HIVE-16441.1.patch, HIVE-16441.2.patch
>
>
> Currently in n-way joins, semi join optimization creates n branches on same key. Instead
it should reuse one branch for all the joins.



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