Nikhil Shetty <nikhil.dba04@gmail.com> writes:
> We want to upgrade a postgres v13 database to v16. but the bootstrap user
> used to initialise the database for both are different
> Can we update the bootstrap user for v13 ? like assign oid as 10 in
> pg_authid?
Do not try to change role OIDs --- you will certainly miss some
places where the OID appears. You can rename it though.
You might have tried this:
regression=# alter user postgres rename to pgsql;
ERROR: session user cannot be renamed
but it's easy to get around that:
regression=# create user joe superuser;
CREATE ROLE
regression=# \c - joe
You are now connected to database "regression" as user "joe".
regression=# alter user postgres rename to pgsql;
ALTER ROLE
regression=# \c - pgsql
You are now connected to database "regression" as user "pgsql".
regression=# drop user joe;
DROP ROLE
regards, tom lane