findepi commented on issue #12819:
URL: https://github.com/apache/datafusion/issues/12819#issuecomment-2468836216

   That's a good point, @gatesn!
   
   What if we had similar (same?) operation, but with different guarantees (ie 
mandatory step). Could be called "prepare" for example. Would it help?
   
   BTW, I would expect `simplify()` to be guaranteed. For example, if 
`simplify` replaces my (hypothetical) my_like_udf with eg regexp_like, i 
shouldn't need to provide implementation of the my_like_udf. If it's not 
supposed to be called, it would be dead code, useless impl burden. Does it make 
sense?
   


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