ALTER TABLE vn.roadmap MODIFY COLUMN m3 int(10) unsigned DEFAULT NULL NULL COMMENT 'Capacidad máxima del remolque'; ALTER TABLE vn.route ADD roadmapStopFk int(11) NULL, ADD CONSTRAINT route_roadmapStop_FK FOREIGN KEY (roadmapStopFk) REFERENCES vn.roadmapStop(id) ON DELETE RESTRICT ON UPDATE CASCADE;