--
-- DEPENDENCIES
--
CREATE USER regression_user;
CREATE USER regression_user2;
CREATE USER regression_user3;
CREATE GROUP regression_group;
CREATE TABLE deptest ();
GRANT SELECT ON TABLE deptest TO GROUP regression_group;
GRANT ALL ON TABLE deptest TO regression_user, regression_user2;
-- can't drop neither because they have privileges somewhere
DROP USER regression_user;
ERROR:  user "regression_user" cannot be dropped because some objects depend on it
DETAIL:  in this database: table deptest
DROP GROUP regression_group;
ERROR:  group "regression_group" cannot be dropped because some objects depend on it
DETAIL:  in this database: table deptest
-- if we revoke the privileges we can drop the group
REVOKE SELECT ON deptest FROM GROUP regression_group;
DROP GROUP regression_group;
-- can't drop the user if we revoke the privileges partially
REVOKE SELECT, INSERT, UPDATE, DELETE, RULE, REFERENCES ON deptest FROM regression_user;
DROP USER regression_user;
ERROR:  user "regression_user" cannot be dropped because some objects depend on it
DETAIL:  in this database: table deptest
-- now we are OK to drop him
REVOKE TRIGGER ON deptest FROM regression_user;
DROP USER regression_user;
-- we are OK too if we drop the privileges all at once
REVOKE ALL ON deptest FROM regression_user2;
DROP USER regression_user2;
-- can't drop the owner of an object
ALTER TABLE deptest OWNER TO regression_user3;
DROP USER regression_user3;
ERROR:  user "regression_user3" cannot be dropped because some objects depend on it
DETAIL:  in this database: table deptest
-- if we drop the object, we can drop the user too
DROP TABLE deptest;
DROP USER regression_user3;