andygrove commented on pull request #9682:
URL: https://github.com/apache/arrow/pull/9682#issuecomment-797172425


   Thanks @seddonm1 this is a really important feature to add. 
   
   To answer your question about the two options, I would favor making this 
explicit and let the user choose between  `cast` and `safe_cast` (or whatever 
name we choose) when building their logical query plan via DataFrame or SQL.
   
   Our optimizer has automatic type coercion rules and I would expect those to 
default to `safe_cast`. If the user doesn't like that behavior then they can 
add explicit unsafe casts instead.


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