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From "Laljo John Pullokkaran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11152) Swapping join inputs in ASTConverter
Date Wed, 01 Jul 2015 18:00:05 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14610731#comment-14610731
] 

Laljo John Pullokkaran commented on HIVE-11152:
-----------------------------------------------

I agree, you are correct [~jcamachorodriguez].

+1 Conditional on clean QA run.

> Swapping join inputs in ASTConverter
> ------------------------------------
>
>                 Key: HIVE-11152
>                 URL: https://issues.apache.org/jira/browse/HIVE-11152
>             Project: Hive
>          Issue Type: Bug
>          Components: CBO
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-11152.02.patch, HIVE-11152.patch
>
>
> We want that multijoin optimization in SemanticAnalyzer always kicks in when CBO is enabled
(if possible). For that, we may need to swap the join inputs when we return from CBO through
the Hive AST.



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