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https://issues.apache.org/jira/browse/HIVE-25693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-25693 started by Ashish Sharma.
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> Vector implementation return Incorrect results for STDDEV, STDDEV_SAMP,
> STDDEV_POP for floating point data types.
> -----------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-25693
> URL: https://issues.apache.org/jira/browse/HIVE-25693
> Project: Hive
> Issue Type: Improvement
> Reporter: Ashish Sharma
> Assignee: Ashish Sharma
> Priority: Major
>
> Description
> Script-
> create table test ( col1 int );
> insert into values
> ('10230.72'),('10230.72'),('10230.72'),('10230.72'),('10230.72'),('10230.72'),('10230.72');
> select STDDEV_SAMP(col1) AS STDDEV_6M , STDDEV(col1) as STDDEV
> ,STDDEV_POP(col1) as STDDEV_POP from test;
> Result-
> STDDDEV_SAMP STDDEV STDDEV_POP
> 5.940794514955821E-13 5.42317860890711E-13 5.42317860890711E-13
> Expected-
> STDDDEV_SAMP STDDEV STDDEV_POP
> 0 0 0
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