findepi commented on issue #14763:
URL: https://github.com/apache/datafusion/issues/14763#issuecomment-2668292359

   > In an extensible query engine, users should define coercion rules as part 
of the function definition, specifying how data types are converted
   
   Why??
   
   > The engine itself cannot define coercion rules for every function.
   
   The function itself cannot define coercion rules for the engine.
   


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