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