ALTER TABLE vn.supplier
	CHANGE companySize companySize enum('small','medium','big') CHARACTER SET utf8mb3
		COLLATE utf8mb3_general_ci DEFAULT NULL NULL AFTER stamp,
	ADD geoFk int(11) DEFAULT NULL NULL AFTER companySize,
	ADD CONSTRAINT supplier_zoneGeo_FK FOREIGN KEY (geoFk)
			REFERENCES vn.zoneGeo(id) ON DELETE RESTRICT ON UPDATE CASCADE;

CREATE OR REPLACE TEMPORARY TABLE tmp.tSupplierGeo
	(PRIMARY KEY (id))
	ENGINE = MEMORY
	SELECT s.id, p.geoFk
		FROM vn.supplier s
			JOIN vn.town t ON t.provinceFk = s.provinceFk
			JOIN vn.postCode p ON p.townFk = t.id
				AND (p.code = s.postCode OR s.postCode IS NULL)
			LEFT JOIN vn.supplierAddress sad ON sad.supplierFk = s.id
			JOIN vn.zoneGeo zg ON zg.id = p.geoFk
		GROUP BY s.id
		ORDER BY (s.city SOUNDS LIKE t.`name`) DESC,
			(p.code = s.postCode) DESC,
			(p.code = sad.postalCode) DESC;

UPDATE vn.supplier s
		JOIN tmp.tSupplierGeo tsg ON tsg.id = s.id
	SET s.geoFk = tsg.geoFk;

DROP TEMPORARY TABLE tmp.tSupplierGeo;