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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-9984) JoinReorder's getOutputSize is exponential
Date Wed, 18 Mar 2015 23:07:38 GMT

     [ https://issues.apache.org/jira/browse/HIVE-9984?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gopal V reassigned HIVE-9984:
-----------------------------

    Assignee: Gopal V  (was: Gunther Hagleitner)

> JoinReorder's getOutputSize is exponential
> ------------------------------------------
>
>                 Key: HIVE-9984
>                 URL: https://issues.apache.org/jira/browse/HIVE-9984
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gunther Hagleitner
>            Assignee: Gopal V
>         Attachments: HIVE-9984.1.patch, HIVE-9984.2.patch
>
>
> Found by [~mmokhtar]. Causes major issues in large plans (50+ joins). Simple fix would
be to memoize the recursion. There should also be a flag to switch this opt off.



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