Laurenz Albe <laurenz.albe@cybertec.at> writes:
> On Thu, 2021-09-02 at 08:50 +0300, Alexander Kass wrote:
>> We have a small number of users that do not have xmin in pg_database
>> (we've asked them to try `select xmin from pg_database` and got
>> `column xmin does not exist`).
> All PostgreSQL tables have "xmin", and all catalog tables do as well.
Indeed. This seems to be evidence of corruption in the pg_attribute
catalog. If you're really lucky, reindexing pg_attribute might fix
it, though I wonder what other problems there are. (It's odd though
that identical corruption would happen to different installations.)
regards, tom lane