[jira] [Created] (CALCITE-6839) The SUM function sometimes throws overflow exceptions due to incorrect return types

[xiong duan (Jira)]

xiong duan created CALCITE-6839:
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             Summary: The SUM function sometimes throws overflow exceptions due 
to incorrect return types
                 Key: CALCITE-6839
                 URL: https://issues.apache.org/jira/browse/CALCITE-6839
             Project: Calcite
          Issue Type: Bug
            Reporter: xiong duan


 The SQL in dummy.iq:
{code:java}
!use scott
!set outputformat mysql

select sum(mgr) from emp;

!ok{code}
Because the data type of MGR is TINYINT, according to SUM's data type inference 
rules, the data type of SUM is also TINYINT.

This SQL throws the exception:
{code:java}
java.sql.SQLException: Error while executing SQL "select sum(mgr) from emp": 
Value 38835 out of range {code}



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