---------------------
               | DBIx::Class::Core |
               | update()          |
               ---------------------
           /      |            |      \
          /       |            |       \
------------ ------------ ------------ ------------ 
| Table A  | | Table B  | | Table C  | | Table D  | .......
| update() | | update() | | update() | | update() |
------------ ------------ ------------ ------------