Re: [I] InvalidArgumentError("Column 'COUNT(DISTINCT demo.name)[count distinct]' is declared as non-nullable but contains null values")' [datafusion]

[via GitHub]

findepi commented on issue #4040:
URL: https://github.com/apache/datafusion/issues/4040#issuecomment-2205206849

   > 5\. Query like following statement， with Group-By and Count(DISTINCT) 
operator.
   > 
   > ```
   > select `t`, count(distinct name) from demo group by `t`
   > ```
   
   i guess `app` was meant?
   
   the bug doesn't look reproducible on current main
   @alamb please close


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