liukun4515 commented on issue #1418:
URL: 
https://github.com/apache/arrow-datafusion/issues/1418#issuecomment-990432965


   > I think using `float64` for the result type makes sense
   
   Do you mean to change this line 
https://github.com/apache/arrow-datafusion/blob/415c5e124af18a05500514f78604366d860dcf5a/datafusion/src/physical_plan/expressions/sum.rs#L57
 and return FLOAT64 for sum(float32)?


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