edmondop commented on issue #11618:
URL: https://github.com/apache/datafusion/issues/11618#issuecomment-2278752770

   @jayzhan211 do you think we should start by adding an helper macro for 
pattern matching branches of UDF `invoke` that should never happen?
   
   ```rust
   udf_unreachable!()
   ```
   
   that might create an 
[InternalError](https://github.com/apache/datafusion/blob/1e93f7fa2cb3b7bda71743e7ebe24999ff4d40a4/datafusion/common/src/error.rs#L91)
   
   ```rust
   DataFusionError::Internal("This branch of the UDF should never be executed 
since pre-requisites are checked through type_signature and return_type")
   ```
   
   


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