alamb commented on issue #15914:
URL: https://github.com/apache/datafusion/issues/15914#issuecomment-3177010388

   > One way I can think of is to define a placeholder UDF and leverage 
ScalarUDFImpl::simplify() so that the UDF actually got rewritten, so that the 
placeholder UDF will not be part of the physical plan. I'm not sure if this is 
a hack though, so I'd love to see if there is a better way.
   
   I think that makes sense to me (I don't know of a better way and it doesn't 
sound like a hack in my mind)


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