RE: Transactions involving multiple postgres foreign servers, take 2

From: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
> Using pg_cancel_backend() and pg_terminate_backend() a DBA can cancel
> running query from any backend or terminate a backend. For either to
> work the backend needs to be interruptible. IIRC, Robert had made an
> effort to make postgres_fdw interruptible few years back.

Yeah, I know those functions.  Sawada-san was talking about Ctrl + C, so I responded accordingly.

Also, how can the DBA find sessions to run those functions against?  Can he tell if a session is connected to or
runningSQL to a given foreign server?  Can he terminate or cancel all session with one SQL command that are stuck in
accessinga particular foreign server?
 

Furthermore, FDW is not cancellable in general.  So, I don't see a point in trying hard to make only commit be
cancelable.


Regards
Takayuki Tsunakawa