unable to drop user in PostgreSQL 12.4

Question

I am unable to drop user as I am getting default privileges error.

postgres=# drop user xyz;
ERROR: role "xyz" cannot be dropped because some objects depend on it
DETAIL: owner of default privileges on new functions belonging to role xyz

then I checked default privileges in database,

 postgres=# \ddp
Default access privileges
Owner | Schema | Type | Access privileges
---- -+------- +----------+-------
xyz | | function |

Could you please let me know how to revoke this default privileges?

Answer 1

You have to grant the "default" default privileges:

ALTER DEFAULT PRIVILEGES FOR ROLE xyz GRANT EXECUTE ON FUNCTIONS TO PUBLIC;
ALTER DEFAULT PRIVILEGES FOR ROLE xyz GRANT EXECUTE ON FUNCTIONS TO xyz;

Then you should be able to drop the role.

Answer 2

This is the safe sequence of commands to drop a role:

Run in every involved database of the DB cluster.

REASSIGN OWNED BY xyz TO postgres;
DROP OWNED BY xyz;

DROP OWNED also gets rid of all privileges and default privileges!

Finally:

DROP ROLE xyz;

More detailed explanation:

• Find objects linked to a PostgreSQL role