On Thu, Sep 1, 2016 at 8:38 PM, Andres Freund <andres@anarazel.de> wrote:
>
> I'm not convinced this makes much sense. All FDWs, dblink etc. already
> allow you do stuff outside of a transaction.
You as a DBA can prevent FDWs from being used and dblink is an
extension that you don't have to install.
So if preventing side-effects is necessary in your application, that
can be achieved by simply not installing dblink and preventing FDWs.