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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-13423) Change the precison/scale for intermediate sum result for decimal datatype in GroupBy operator
Date Tue, 05 Apr 2016 14:58:25 GMT

     [ https://issues.apache.org/jira/browse/HIVE-13423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aihua Xu updated HIVE-13423:
----------------------------
    Description: 
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.

  was:
When we handle sum over decimal datatype, e.g., 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.


> Change the precison/scale for intermediate sum result for decimal datatype in GroupBy
operator
> ----------------------------------------------------------------------------------------------
>
>                 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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