Postgres和MySQL创建用户并授予db权限

mysql> create database mydb;
mysql> create user a_user identified by 'ThePassword'
    -> ;
Query OK, 0 rows affected (0.04 sec)

mysql> grant all privileges on mydb.* to a_user@'%';
Query OK, 0 rows affected (0.02 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

create role etl_user login password 'ThePassowrd' valid until 'infinity';

grant all privileges on database mydb to etl_user ;

GRANT CONNECT ON DATABASE mydb TO etl_user;
GRANT USAGE ON SCHEMA public TO etl_user;
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO etl_user;
GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public TO etl_user;

REVOKE CONNECT ON DATABASE mydb FROM etl_user;
REVOKE ALL PRIVILEGES ON ALL TABLES IN SCHEMA public FROM etl_user;
REVOKE ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public FROM etl_user;
REVOKE ALL PRIVILEGES ON ALL FUNCTIONS IN SCHEMA public FROM etl_user;
DROP USER etl_user;