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https://issues.apache.org/jira/browse/HIVE-12531?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Dere updated HIVE-12531:
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Attachment: HIVE-12531.1.patch
Simple patch to replace use of Java Calendar with Joda, which appears to be
significantly faster (setMillis()/getYear() appeared to be 3-4x faster than the
equivalent Calendar operations).
> Implement fast-path for Year/Month UDFs for dates between 1999 and 2038
> -----------------------------------------------------------------------
>
> Key: HIVE-12531
> URL: https://issues.apache.org/jira/browse/HIVE-12531
> Project: Hive
> Issue Type: Improvement
> Reporter: Gopal V
> Assignee: Sergey Shelukhin
> Attachments: HIVE-12531.1.patch
>
>
> Current codepath goes into the JDK Calendar implementation, which is very
> slow for the simple cases in the current decade.
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