Converting To and From UUIDs in MySQL

DELIMITER |

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


Source:  https://gist.github.com/159151/e66f0cc0a643c86041df3adb81d5758611e82096