Mysql: Uuid to bin / bin to uuid functions

gistfile1.txt

DELIMITER |

CREATE FUNCTION bin_to_uuid(b BINARY(16))
RETURNS CHAR(36) DETERMINISTIC
BEGIN
  DECLARE HEX CHAR(32);
  SET HEX = HEX(b);
  RETURN LOWER(CONCAT(LEFT(HEX, 8), '-', MID(HEX, 9,4), '-', MID(HEX, 13,4), '-', MID(HEX, 17,4), '-', RIGHT(HEX, 12)));
END
|

CREATE FUNCTION uuid_to_bin(s CHAR(36))
RETURNS BINARY(16) DETERMINISTIC
RETURN UNHEX(CONCAT(LEFT(s, 8), MID(s, 10, 4), MID(s, 15, 4), MID(s, 20, 4), RIGHT(s, 12)))
|

DELIMITER ;