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https://issues.apache.org/jira/browse/HIVE-22975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17057525#comment-17057525
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Ashutosh Chauhan commented on HIVE-22975:
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+1 LGTM
> Optimise TopNKeyFilter with boundary checks
> -------------------------------------------
>
> Key: HIVE-22975
> URL: https://issues.apache.org/jira/browse/HIVE-22975
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Minor
> Attachments: HIVE-22975.1.patch, Screenshot 2020-03-04 at 3.26.45
> PM.jpg
>
>
> !Screenshot 2020-03-04 at 3.26.45 PM.jpg|width=507,height=322!
>
> It would be good to add boundary checks to reduce cycles spent on topN
> filter. E.g Q43 spends good amount of time in topN.
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