salix/db/routines/vn/triggers/roadmapStop_beforeUpdate.sql

DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` TRIGGER `vn`.`roadmapStop_beforeUpdate`
	BEFORE UPDATE ON `roadmapStop`
	FOR EACH ROW
BEGIN
	DECLARE vMaxEta DATETIME;
	DECLARE vCurrentEta DATETIME;

	SET NEW.editorFk = account.myUser_getId();

	IF NOT (NEW.description <=> OLD.description) THEN
		SET NEW.description = UCASE(NEW.description);
	END IF;

	IF (NOT (NEW.roadmapFk <=> OLD.roadmapFk) AND NEW.roadmapFk IS NOT NULL)
		OR (NOT (NEW.eta <=> OLD.eta)) THEN

		IF NEW.eta < (SELECT etd FROM roadmap WHERE id = NEW.roadmapFk) THEN
			CALL util.throw('Departure time can not be after arrival time');
		END IF;

		SELECT MAX(eta) INTO vMaxEta
			FROM roadmapStop
			WHERE roadmapFk = NEW.roadmapFk
				AND id <> OLD.id;

		IF vMaxEta < NEW.eta OR vMaxEta IS NULL THEN
			SET vMaxEta = NEW.eta;
		END IF;

		SELECT eta INTO vCurrentEta
			FROM roadmap
			WHERE id = NEW.roadmapFk;

		IF (vMaxEta <> vCurrentEta OR vMaxEta IS NULL) OR vMaxEta IS NOT NULL THEN
			UPDATE roadmap
				SET eta = vMaxEta
				WHERE id = NEW.roadmapFk;
		END IF;
	END IF;
END$$
DELIMITER ;