create table pub(a int);
create table prv(a int);
GRANT SELECT ON TABLE pub TO public;
REVOKE SELECT ON TABLE prv FROM public;
SELECT CDB_UserTables() ORDER BY 1;
SELECT 'all',CDB_UserTables('all') ORDER BY 2;
SELECT 'public',CDB_UserTables('public') ORDER BY 2;
SELECT 'private',CDB_UserTables('private') ORDER BY 2;
SELECT '--unsupported--',CDB_UserTables('--unsupported--') ORDER BY 2;
drop table pub;
drop table prv;