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https://issues.apache.org/jira/browse/HIVE-21294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16773693#comment-16773693
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Teddy Choi commented on HIVE-21294:
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I guess you meant VectorReduceSinkObjectHashOperator.
> Vectorization: 1-reducer Shuffle can skip the object hash functions
> -------------------------------------------------------------------
>
> Key: HIVE-21294
> URL: https://issues.apache.org/jira/browse/HIVE-21294
> Project: Hive
> Issue Type: Bug
> Components: Vectorization
> Reporter: Gopal V
> Assignee: Teddy Choi
> Priority: Major
>
> VectorObjectSinkHashOperator can skip the object hashing entirely if the
> reducer count = 1.
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