Is your feature request related to a problem or challenge?

I want to create a UDF function with type signature like this:

func(a any, b any, c bigint)
func(a any, b any, c bigint, d bigint)

there seems to be no way.

Here is the function signature supported by Postgresql.
https://www.postgresql.org/docs/current/extend-type-system.html#EXTEND-TYPES-POLYMORPHIC

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

Additional context

No response