Re: LISTEN vs. two-phase commit

Tom Lane wrote:
> "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> writes:
>> There's a small window between backend A committing and sending a
>> NOTIFY, and the time client B receives the notification from backend B
>> through the connection and reacts to it.
>
> Sorry, I was unclear: the case that's of interest is telling
> self-notifies apart from others. For this purpose, your own backend's
> PID *is* sufficiently stable, because you're still connected to it
> when the notify is sent to you.

Oh, I see. Yes, that's true.

>> This is all very hand-wavy of course, as we don't know of any real
>> application that uses LISTEN/NOTIFY with 2PC...
>
> Yeah. I'm inclined to leave that alone (but document it) until/unless
> someone complains. Without a real use-case to look at, it's a bit hard
> to be sure what's a useful behavior.

Yep.

--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com