DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` FUNCTION `util`.`checkPrintableChars`(
    vString VARCHAR(255)
)   RETURNS tinyint(1)
    DETERMINISTIC
BEGIN
/**
 * Validates whether the input string contains only printable characters  
 * and Spanish special characters (such as ¡, ÿ, etc.).
 *
 * @vString string to check
 */
    RETURN vString REGEXP '^[ -~¡-ÿ]*$';
END$$
DELIMITER ;