Kevin Neufeld <kneufeld(at)refractions(dot)net> writes:
>> Tom Lane wrote:
>>> A superuser can create whatever he wants in pg_catalog. Whether this
>>> is a good idea or will behave smoothly is a topic that has not been
>>> thought about, to my knowledge.
> Sorry, Tom. I think you are mistaken. In my 8.3 instance, system
> catalog modifications are not allowed.
Hm, I had forgotten that the allow_system_table_mods filter extends to
anything at all in pg_catalog. But you could easily enable that setting
in a test database and then see what happens.
regards, tom lane