Oracle SQL Plan operation: SQL MODEL ORDERED FAST

explain plan for
select
   *
from
   dual
model
   dimension by (dummy )
   measures     (42 num)
   ()
;

select * from dbms_xplan.display(format=>'basic');
--
-- ---------------------------------------
-- | Id  | Operation              | Name |
-- ---------------------------------------
-- |   0 | SELECT STATEMENT       |      |
-- |   1 |  SQL MODEL ORDERED FAST|      |
-- |   2 |   TABLE ACCESS FULL    | DUAL |
-- ---------------------------------------