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https://issues.apache.org/jira/browse/HIVE-5583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13814131#comment-13814131
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Eric Hanson commented on HIVE-5583:
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Yes, the IN filter has special handling in VectorizationContext because IN has
a variable number of arguments, and we need to prepare the arguments to add
them to the appropriate VectorExpression.
I will investigate how to do code sharing for the string hash function via a
Hadoop JIRA.
> Implement support for IN (list-of-constants) filter in vectorized mode
> ----------------------------------------------------------------------
>
> Key: HIVE-5583
> URL: https://issues.apache.org/jira/browse/HIVE-5583
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor
> Affects Versions: 0.13.0
> Reporter: Eric Hanson
> Assignee: Eric Hanson
> Fix For: 0.13.0
>
> Attachments: HIVE-5583.1.patch.txt, HIVE-5583.3.patch
>
>
> Implement optimized, vectorized support for filters of this form:
> column IN (constant1, ... constantN)
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