[GitHub] [druid] clintropolis commented on issue #10011: Druid SQL Differing Results When Grouping By 1 Column vs 1 Col With Dummy Column

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

clintropolis commented on issue #10011:
URL: https://github.com/apache/druid/issues/10011#issuecomment-644522119


   Ah neat, I imagine the transformation to native query issue going on here isn’t directly related to the multi-value stuff I did, and the same transformation would happen for single value column  - it just wouldn’t cause an issue in that case like @gianm said. 
   
   Thinking about it though, it seems like that transformation to using a constant expression would never be better than just selecting the column directly due to the overhead of virtual columns, maybe we should just try to prevent the planner from ever doing this?


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