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https://issues.apache.org/jira/browse/HIVE-17375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16140143#comment-16140143
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Ashutosh Chauhan commented on HIVE-17375:
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seems like vectorization tests need to be updated as well.
> stddev_samp,var_samp standard compliance
> ----------------------------------------
>
> Key: HIVE-17375
> URL: https://issues.apache.org/jira/browse/HIVE-17375
> Project: Hive
> Issue Type: Sub-task
> Components: SQL
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Minor
> Attachments: HIVE-17375.1.patch
>
>
> these two udaf-s are returning 0 in case of only one element - however the
> stadard requires NULL to be returned
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