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https://issues.apache.org/jira/browse/HIVE-10215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Dere updated HIVE-10215:
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Fix Version/s: 1.2.0
> Large IN() clauses: deep hashCode performance during optimizer pass
> -------------------------------------------------------------------
>
> Key: HIVE-10215
> URL: https://issues.apache.org/jira/browse/HIVE-10215
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer
> Affects Versions: 1.2.0
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Minor
> Fix For: 1.2.0
>
> Attachments: HIVE-10215.1.patch
>
>
> The logical optimizer uses several maps and sets, which are exceeding
> expensive for large IN() clauses due to the fact that several part of the
> queries walk over the lists without short-circuiting during hashCode(), while
> equals() is faster due to short-circuiting via less expensive operators.
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