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Posted to issues@hive.apache.org by "Lefty Leverenz (JIRA)" <ji...@apache.org> on 2017/09/05 04:29:01 UTC

[jira] [Commented] (HIVE-17375) stddev_samp,var_samp standard compliance

    [ https://issues.apache.org/jira/browse/HIVE-17375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16153097#comment-16153097 ] 

Lefty Leverenz commented on HIVE-17375:
---------------------------------------

Should this change be documented in the wiki?  (If so, please add a TODOC3.0 label.)

* [Hive Operators and UDFs -- Built-in Aggregate Functions (UDAF) | https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-Built-inAggregateFunctions(UDAF)]

> 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
>             Fix For: 3.0.0
>
>         Attachments: HIVE-17375.1.patch, HIVE-17375.2.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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