[GitHub] [arrow-datafusion] alamb commented on issue #600: Allow User Defined Aggregates to return multiple values / structs

[GitBox <gi...@apache.org>]

alamb commented on issue #600:
URL: https://github.com/apache/arrow-datafusion/issues/600#issuecomment-866240917


   > Would supporting structs for ScalarValues solve this nicely?
   
   I think so @jorgecarleitao  - what is also needed is some way in SQL to refer to the structs
   
   So like if the UDA could return a struct with fields `min` and `max` I would want to be able to do something like
   
   ```sql
   select t.min, t.max from (select my_udagg(col1, col2) from my_table) as t
   ```
   
   or something


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