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Posted to issues@hive.apache.org by "Ashish Sharma (Jira)" <ji...@apache.org> on 2021/10/29 05:20:00 UTC
[jira] [Work started] (HIVE-25653) Precision problem in STD,
STDDDEV_SAMP,STDDEV_POP
[ https://issues.apache.org/jira/browse/HIVE-25653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on HIVE-25653 started by Ashish Sharma.
--------------------------------------------
> Precision problem in STD, STDDDEV_SAMP,STDDEV_POP
> -------------------------------------------------
>
> 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
>
> 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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