Ivan Sergio Borgonovo <mail(at)webthatworks(dot)it> writes:
> I was mainly concerned about assigning ownership of a sequence to a
> column that is not an int.
I think you can get away with that. It's already the case within the
standard usage that the owning column could be either int or bigint.
FWIW, I agree with the idea of adding a default expression so that it
behaves even more like a regular serial column.
regards, tom lane