[jira] [Resolved] (SPARK-19225) Spark SQL round constant double return null

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-19225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-19225.
----------------------------------
    Resolution: Incomplete

> Spark SQL round constant double return null 
> --------------------------------------------
>
>                 Key: SPARK-19225
>                 URL: https://issues.apache.org/jira/browse/SPARK-19225
>             Project: Spark
>          Issue Type: Bug
>    Affects Versions: 2.0.0, 2.0.1, 2.0.2, 2.1.0
>            Reporter: discipleforteen
>            Priority: Major
>              Labels: bulk-closed
>   Original Estimate: 1m
>  Remaining Estimate: 1m
>
> Spark SQL round constant double value may return null . like 'select round(4.4, 2)' return null in spark 2.x. it's not compatible with spark 1.x version. it seems 4.4 is casted to decimal with new SqlBase.g4 , which is casted to double in spark 1.x version.  round decimal 4.4, 2 get null in changeprecision...



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