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https://issues.apache.org/jira/browse/HIVE-20985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16703927#comment-16703927
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Jason Dere commented on HIVE-20985:
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Looks like the patch ends up disabling most of the scratch column re-use.
I don't have a lot of knowledge of the vectorization details, cc [~teddy.choi]
[~gopalv]
> If select operator inputs are temporary columns vectorization may reuse some
> of them as output
> ----------------------------------------------------------------------------------------------
>
> Key: HIVE-20985
> URL: https://issues.apache.org/jira/browse/HIVE-20985
> Project: Hive
> Issue Type: Bug
> Components: Vectorization
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-20985.01.patch, HIVE-20985.02.patch
>
>
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