On Mon, Apr 29, 2013 at 9:44 PM, Stephen Frost <sfrost@snowman.net> wrote:
> * Kevin Grittner (kgrittn@ymail.com) wrote:
>> If they modified the heap files that way while the server was
>> running, the results would be somewhat unpredictable. If they did
>> it while the server was stopped, starting the server and attempting
>> to access the matview would generate:
>
> Right, the point being that they could (ab)use it as a flag to trigger
> something to happen. I'd also be worried about failure cases where
> files appear to be zero-length.
If you assume that people are going to modify files while the backend
is running, nothing we do anywhere is safe.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
