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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-12503) GBY-Join transpose rule may go in infinite loop
Date Tue, 24 Nov 2015 05:44:10 GMT

     [ https://issues.apache.org/jira/browse/HIVE-12503?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Chauhan updated HIVE-12503:
------------------------------------
    Attachment: HIVE-12503.1.patch

[~jpullokkaran] suggested to do costing within the rule which makes sense, since this makes
sure that rule mutates the plan only when it needs to, making it robust against the Planner
idiosyncrasies. 

> GBY-Join transpose rule may go in infinite loop
> -----------------------------------------------
>
>                 Key: HIVE-12503
>                 URL: https://issues.apache.org/jira/browse/HIVE-12503
>             Project: Hive
>          Issue Type: Bug
>          Components: CBO, Logical Optimizer
>    Affects Versions: 2.0.0
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>         Attachments: HIVE-12503.1.patch, HIVE-12503.patch
>
>
> This happens when pushing aggregate is not found to be any cheaper. Can be reproduced
by running cbo_rp_auto_join1.q with flag turned on.



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