text: 
  ALTER TABLE `dlayer`.`user_site_page_structure_row`
  	ADD CONSTRAINT `user_site_page_structure_row_fk1` FOREIGN KEY (`site_id`) REFERENCES `user_site` (`id`),
  	ADD CONSTRAINT `user_site_page_structure_row_fk2` FOREIGN KEY (`page_id`) REFERENCES `user_site_page` (`id`);
  