Is it possible to revoke usage of pg_catalog for a specific user?
The reason is to secure PostgreSQL. If a user can connect to a database, it could query pg_class, pg_attribute, pg_proc search for specific tables and if using dblink, even database passwords...
I just made a test, revoking usage of pg_catalog from PUBLIC, but tables are still available through "SELECT * FROM pg_class", but not through "SELECT * FROM pg_catalog.pg_class". I found in manual, where it says pg_catalog is searched before any schema on search_path...
If schema pg_catalog became blocked, PostgreSQL could be used? Could it be possible to made queries on allowed schemas and tables? This could be an item for the wishlist?