refactor: refs #7681 Requested changes

db/routines/vn/procedures/route_updateM3.sql

@@ -8,16 +8,11 @@ BEGIN
  *
  * @param vSelf Id ruta
  */
-	CREATE OR REPLACE TEMPORARY TABLE tRouteVolume
-		ENGINE = MEMORY
-		SELECT IFNULL(SUM(volume), 0) volume
-			FROM saleVolume
-			WHERE routeFk = vSelf;
+	DECLARE vVolume DECIMAL(10,1)
+		DEFAULT (SELECT SUM(volume) FROM saleVolume WHERE routeFk = vSelf);
 
 	UPDATE `route`
-		SET m3 = (SELECT volume FROM tRouteVolume)
+		SET m3 = IFNULL(vVolume, 0)
 		WHERE id = vSelf;
-
-	DROP TEMPORARY TABLE tRouteVolume;
 END$$
 DELIMITER ;