5.6.38 optimized>CREATE USER roel@''; Query OK, 0 rows affected (0.00 sec)
5.6.38 optimized>GRANT PROXY ON roel TO''@''; Query OK, 0 rows affected (0.00 sec)
5.6.38 optimized>CREATE USER roel@'';
Query OK, 0 rows affected (0.00 sec)
5.6.38 optimized>GRANT PROXY ON roel TO''@'';
Query OK, 0 rows affected (0.00 sec)