stantheman0128 commented on issue #3646:
URL: 
https://github.com/apache/datafusion-comet/issues/3646#issuecomment-5840765241

   I'd like to take this. It still reproduces on a recent main (`1c25b492`) 
with `allowIncompatible` on: removing the ignore on the literal query in 
`array_except.sql` fails with `array_except received incompatible types: 
List(Int32), List(non-null Int32)`.
   
   The plan is to make both sides agree on a nullable element in the serde, 
reusing `normalizeContainerNullability` as suggested on #4237, and then 
re-enable that query. #5526 unifies nested element types for the set ops and 
leaves primitive elements alone, so I'll keep this to the list-level 
nullability and rebase onto it if it lands first.
   


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