Allow postgres user to only list his own database

Question

I\'m using a postgresql server and I want to forbid my users to see what other databases are on the same server.

Essentially a \\l should only list his own

Answer 1

@araqnid 's answer above seems to be the way to go except for one problem: select oid, 1262::oid as tableoid, pg_database_catalog.* will have the oid column defined twice in its results, once as expicitly given via select oid and once taken from pg_database_catalog.*. At least on Postgresql 12 create view pg_catalog.pg_database will complain that the column oid is being defined twice and will abort.

Thus the corrected code would be:

alter table pg_catalog.pg_database rename to pg_database_catalog;
create view pg_catalog.pg_database as
  select 1262::oid as tableoid, pg_database_catalog.*
  from pg_catalog.pg_database_catalog
  where has_database_privilege(pg_database_catalog.oid, 'connect');    
grant select on pg_catalog.pg_database to public;

Please refer to the original answer for all other information.

I'd be glad if somebody could confirm that my findings here are correct (or refute them).