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https://issues.apache.org/jira/browse/HIVE-12956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15124043#comment-15124043
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Sergey Shelukhin commented on HIVE-12956:
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Hmm... this patch would entirely disable CBO in tests. Sounds like a plan! :)
> run CBO in tests with mapred.mode=strict
> ----------------------------------------
>
> Key: HIVE-12956
> URL: https://issues.apache.org/jira/browse/HIVE-12956
> Project: Hive
> Issue Type: Test
> Reporter: Sergey Shelukhin
> Assignee: Ashutosh Chauhan
> Attachments: HIVE-12956.patch
>
>
> There's a strange condition in CBO check that prevents CBO from running in
> Hive tests (in tests specifically) when mapred.mode is set to strict. I
> remember seeing it before, and noticed it again recently.
> It is both surprising that we wouldn't test CBO in strict mode, and also
> problematic for some q files because strict mode is going to be deprecated in
> HIVE-12727. This needs to be removed.
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