DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` PROCEDURE `vn`.`travel_checkDates`(vShipped DATE, vLanded DATE)
BEGIN
/**
 * Checks the landing/shipment dates of travel, throws an error
 * ir they are not correct.
 *
 * @param vShipped The shipment date
 * @param vLanded The landing date
 */
 
	IF vLanded < vShipped THEN
		SIGNAL SQLSTATE '45000'
			SET MESSAGE_TEXT = 'Landing cannot be lesser than shipment';
	END IF; 
END$$
DELIMITER ;