Re: [v9.4] row level security

>> I'm not sure what the solution would be, exactly.  Deny permission for
>> EXPLAIN on certain tables?
> 
> That would close only one covert channel.  Others were already pointed out
> upthread, and I'll bet there are more ...

Mind you, fundamentally this is no different from allowing INSERT
permission on a table but denying SELECT, or denying SELECT on certain
columns.  In either case, covert channels for some data are available.

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com