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https://issues.apache.org/jira/browse/HIVE-13423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aihua Xu updated HIVE-13423:
----------------------------
    Summary: Handle the overflow case for decimal datatype for sum()  (was: 
Change the precison/scale for intermediate sum result for decimal datatype in 
GroupBy operator)

> Handle the overflow case for decimal datatype for sum()
> -------------------------------------------------------
>
>                 Key: HIVE-13423
>                 URL: https://issues.apache.org/jira/browse/HIVE-13423
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 2.0.0
>            Reporter: Aihua Xu
>            Assignee: Aihua Xu
>
> When we handle sum over decimal datatype in a groupby statement, it will 
> possibly yield overflow if we use original data type. 
> We need to change precision/scale for sum() result or give an error/warning 
> if such change is not possible.



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