position varchar(50),
employee_id INTEGER,
CONSTRAINT FK5302D47D93FE702E_diff FOREIGN KEY (employee_id) REFERENCES person (person_id),
+ CONSTRAINT `demo_constraint` CHECK (`employee_id` > 0 and `employee_id` IS NOT NULL and `employee_id` not in (0)),
PRIMARY KEY (employee_id, position)
) ENGINE=InnoDB;