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Posted to github@arrow.apache.org by "smiklos (via GitHub)" <gi...@apache.org> on 2023/08/09 14:33:01 UTC

[GitHub] [arrow-datafusion] smiklos commented on issue #7241: Optimizer `push_down_projection` failed due to different schemas

smiklos commented on issue #7241:
URL: https://github.com/apache/arrow-datafusion/issues/7241#issuecomment-1671504726

   I'm not entirely sure what the result of selecting no columns should be? 
   The current behavior is the same for csv files or any table source. 
   
   Imo datafusion should reject queries that don't select anything or alternatively act as if 'SELECT NULL' was issued 


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