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https://issues.apache.org/jira/browse/HIVE-8052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14142748#comment-14142748
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Matt McCline commented on HIVE-8052:
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Yes, good point. Added variance, var_pop, var_samp, std, stddev, stddev_pop,
stddev_samp.
It turns out sum(timestamp) is planned with a Double as output from the
aggregation instead of BigInt and this doesn't work when the reduce-side is
vectorized. So, it remains unvectorized (see HIVE-8211).
> Vectorization: min() on TimeStamp datatype fails with error "Vector aggregate
> not implemented: min for type: TIMESTAMP"
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-8052
> URL: https://issues.apache.org/jira/browse/HIVE-8052
> Project: Hive
> Issue Type: Bug
> Reporter: Matt McCline
> Assignee: Matt McCline
> Priority: Critical
> Attachments: HIVE-8052.01.patch, HIVE-8052.02.patch,
> HIVE-8052.04.patch, HIVE-8052.05.patch
>
>
> Changes in HIVE-5760 to make explicit when timestamp and date can be
> vectorized as Long were accidentally to strict for min, max, count, etc.
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