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https://issues.apache.org/jira/browse/HIVE-25653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sankar Hariappan updated HIVE-25653:
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Summary: Incorrect results returned by STDDEV, STDDEV_SAMP, STDDEV_POP for
floating point data types. (was: Precision problem in STD,
STDDDEV_SAMP,STDDEV_POP)
> Incorrect results returned by STDDEV, STDDEV_SAMP, STDDEV_POP for floating
> point data types.
> --------------------------------------------------------------------------------------------
>
> Key: HIVE-25653
> URL: https://issues.apache.org/jira/browse/HIVE-25653
> Project: Hive
> Issue Type: Improvement
> Reporter: Ashish Sharma
> Assignee: Ashish Sharma
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> 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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