On Wed, Mar 04, 2020 at 06:57:00PM +0900, Fujii Masao wrote:
> Yes. But I'm sure that DBA has already considered the measures
> againt such threads. Otherwise malicious users can do anything
> more malicious rather than changing oid.
A superuser is by definition able to do anything on the system using
the rights of the OS user running the Postgres backend. One thing for
example is to take a base backup of the full instance, but you can do
much more interesting things once you have such rights. So I don't
quite get the line of arguments used on this thread regarding the
relation with somebody being malicious with superuser rights, and the
arguments about a superuser able to manipulate freely the catalog's
contents.
--
Michael