DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` FUNCTION `vn`.`getUserId`(userName varchar(30))
	RETURNS int(11)
	NOT DETERMINISTIC
	READS SQL DATA
BEGIN
	DECLARE vUser INT;

	SELECT id INTO vUser
		FROM account.user
		WHERE `name` = userName;

	RETURN vUser;

END$$
DELIMITER ;