Henter RAND() rækker uden ORDER BY RAND() i kun én forespørgsel

Er der en grund til, at en lagret procedure ikke kan bruges til at oprette en forberedt erklæring?

DELIMITER //
DROP PROCEDURE IF EXISTS rand_quote//
CREATE PROCEDURE rand_quote()
BEGIN
    SET @rand := ROUND((SELECT COUNT(*) FROM quotes) * RAND());
    SET @sql := CONCAT('SELECT * FROM quotes LIMIT ', @rand, ', 1');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
END;
//
DELIMITER ;