DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` FUNCTION `vn2008`.`cc_to_iban`(cc VARCHAR(20))
	RETURNS varchar(4) CHARSET utf8mb3 COLLATE utf8mb3_general_ci
	DETERMINISTIC
BEGIN
	DECLARE iban VARCHAR(4);
	select
		CONCAT('ES',
			RIGHT(
				concat(0,
					98-
						mod(
							concat(
								mod(
									concat(
										mod(
											concat(
												mod(
													substring(cc,1,8),
													97),
												substring(cc,9,8)
											),
											97),
										substring(
											concat(
												cc,
												142800
											),
											17,
											8
										)
									),
								97),
								substring(
									concat(
										cc,
										142800
									),
									25,
									2
								)
							),
						97)
					)
			,2)
		)into iban;
RETURN iban;
END$$
DELIMITER ;