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Re: Application name patch - v4

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Marko Kreen <markokr(at)gmail(dot)com>
Cc: Dave Page <dpage(at)pgadmin(dot)org>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com>, Dimitri Fontaine <dfontaine(at)hi-media(dot)com>
Subject: Re: Application name patch - v4
Date: 2009-12-01 18:25:22
Message-ID: 4508.1259691922@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Marko Kreen <markokr(at)gmail(dot)com> writes:
> If the pooler gets new connection with same username:database
> as some existing connection, but with different appname,
> what it is supposed to do?

Whatever it wants to.  People seem to be imagining that the appname
isn't under the control of the pooler.  It's a connection property,
remember?  It won't be set at all unless the pooler explicitly sets it
or allows it to be set.

I would imagine that typically a pooler would consider the whole
connection string as defining connection properties and so appname would
work the same as username or anything else, ie, you get shunted into
a different connection pool if you ask for a different appname.

			regards, tom lane

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