Re: RelDataTypeSystemImpl#deriveSumType question.

[stanilovsky evgeny]

Thanks, ok standard contract it as __implementation-defined__, now it`s  
clear.

Hi stanilovsky,
You can customize your behavior in RelDataTypeSystem. We have discussed  
this issue before, you could find more details in [1] and [2].
- [1] https://issues.apache.org/jira/browse/CALCITE-5604
- [2] https://issues.apache.org/jira/browse/CALCITE-1945

Best,
Dan Zou





2023年4月25日 19:14，stanilovsky evgeny <estanilovs...@gridgain.com>  
写道：

Hello !
Probably can anyone explain why RelDataTypeSystemImpl#deriveSumType  
returns INTEGER for incoming INTEGER type ?
I run simple: SELECT i, SUM(i) FROM integers i1 GROUP BY i ORDER BY i;  
and i expect that return type will be BIGINT.
Did i miss something here ?
Thanks !