Re: Application name patch - v4

Marko Kreen <markokr@gmail.com>

From: Marko Kreen <markokr@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Dave Page <dpage@pgadmin.org>, Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, Andres Freund <andres@anarazel.de>, pgsql-hackers <pgsql-hackers@postgresql.org>, Robert Haas <robertmhaas@gmail.com>, Dimitri Fontaine <dfontaine@hi-media.com>
Date: 2009-12-01T16:52:31Z
Lists: pgsql-hackers
On 12/1/09, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Dave Page <dpage@pgadmin.org> writes:
> > On Tue, Dec 1, 2009 at 4:19 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>  >> I don't think that we need to bump the protocol version.  The real
>  >> alternative here would be that libpq sends a startup packet that
>  >> includes application_name, and if it gets an error back from that,
>  >> it starts over without the app name.
>
>
> > I looked (briefly) at doing that when we first ran into this
>  > suggestion. As you pointed out at the time, it seemed like that would
>  > require some fairly ugly hackery in fe-connect.c
>
>
> Perhaps, but at the time it wasn't apparent that issuing a separate SET
>  would create user-visible behavioral inconsistencies.  Now that we've
>  realized that, I think we should reconsider.
>
>  If people are agreed that double connect is a better alternative
>  I'm willing to go look at how to make it happen.

Is it supposed to work with pooling or not?

If the pooler gets new connection with same username:database
as some existing connection, but with different appname,
what it is supposed to do?

-- 
marko