What's this structure called?

[revloc02c]

I did it more because I found the problem interesting rather than the solution being useful (and the problem was rather intriguing...some say I'm a geek that way). But since it's done I might as well post it:

-- ----------------------------
-- Function structure for `fn_displayClasses`
-- ----------------------------
DROP FUNCTION IF EXISTS `fn_displayClasses`;
DELIMITER ;;
CREATE DEFINER=`root`@`localhost` FUNCTION `fn_displayClasses`(classes int) RETURNS varchar(128) CHARSET utf8
BEGIN
	-- receives bitmask number for classes and converts it to a list of classes
	DECLARE classList VARCHAR(128);
	SET classList = "";

	IF (classes & 1) = 1 THEN
		SET classList = CONCAT(classList, "Warrior, ");
	END IF;
	IF (classes & 2) = 2 THEN
		SET classList = CONCAT(classList, "Cleric, ");
	END IF;
	IF (classes & 4) = 4 THEN
		SET classList = CONCAT(classList, "Paladin, ");
	END IF;
	IF (classes & 8) = 8 THEN
		SET classList = CONCAT(classList, "Ranger, ");
	END IF;
	IF (classes & 16) = 16 THEN
		SET classList = CONCAT(classList, "Shadow Knight, ");
	END IF;
	IF (classes & 32) = 32 THEN
		SET classList = CONCAT(classList, "Druid, ");
	END IF;
	IF (classes & 64) = 64 THEN
		SET classList = CONCAT(classList, "Monk, ");
	END IF;
	IF (classes & 128) = 128 THEN
		SET classList = CONCAT(classList, "Bard, ");
	END IF;
	IF (classes & 256) = 256 THEN
		SET classList = CONCAT(classList, "Rogue, ");
	END IF;
	IF (classes & 512) = 512 THEN
		SET classList = CONCAT(classList, "Shaman, ");
	END IF;
	IF (classes & 1024) = 1024 THEN
		SET classList = CONCAT(classList, "Necromancer, ");
	END IF;
	IF (classes & 2048) = 2048 THEN
		SET classList = CONCAT(classList, "Wizard, ");
	END IF;
	IF (classes & 4096) = 4096 THEN
		SET classList = CONCAT(classList, "Magician, ");
	END IF;
	IF (classes & 8192) = 8192 THEN
		SET classList = CONCAT(classList, "Enchanter, ");
	END IF;
	IF (classes & 16384) = 16384 THEN
		SET classList = CONCAT(classList, "Beastlord, ");
	END IF;
	IF (classes & 32768) = 32768 THEN
		SET classList = CONCAT(classList, "Berserker, ");
	END IF;

	RETURN classList;

END
;;
DELIMITER ;

I write and run a lot of SQL queries, so having a function that displays classes is something I will use. Didn't really need it, but it was fun to figure out. Maybe someone will want to use it...for something. Cheers.