Martijn Tonies wrote:

>
> So, changing the domain datatype is prohibited?

Why do you ask? I wrote

> However, you can't change the data type.

I think I was clear: the objective of the feature BASED ON is to keep
domains data types in sync with other usages like procedure params and
variables, without going into endless discussions about constraints. To be
in sync, the engine must complain if a change is attempted in the domain.
Otherwise, what's the objective and value of the feature?

C.