New MS patent: sounds like PG db rules

Hi all,

Haven't delved into PG's rules system for a long time, but to me, this 
newly granted Microsoft patent sounds pretty close:

   US Patent 7376668 - Dynamic filtering in a database system
   Issued on May 20, 2008
   http://www.patentstorm.us/patents/7376668/claims.html

Abstract
"A dynamic filtering module receives a request to perform an operation 
on data in the database and a input. The dynamic filtering module 
provides as an output a modified request to a data access system. The 
modified request can include one or more restrictions added to the 
original request pertaining to which data will be accessed as a function 
of the input."

Am I wrong in thinking that PG provides prior art here?

Regards and best wishes,

Justin Clift

-- 
Salasaga  -  Open Source eLearning IDE
               http://www.salasaga.org

-- 
Sent via pgsql-general mailing list (pgsql-general@[EMAIL PROTECTED]
)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general