From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Thies C. Arntzen <thies@digicol.de>
Cc: Rasmus@candle.pha.pa.us, Lerdorf <rasmus@php.net>
Cc: PostgreSQL-interfaces <pgsql-interfaces@postgresql.org>
Subject: PostgreSQL and PHP persistent connections
Date: Wed, 7 Feb 2001 14:12:26 -0500 (EST)
Message-ID: <200102071912.OAA27530@candle.pha.pa.us> (raw)
Thies, we talked at LinuxWorld about improving the reliability of
persistent PostgreSQL connections in PHP.
I believe the problem is that persistent connections sometime do not
pass clean sessions because of open transactions and SET changes to the
session.
We discussed using 'ROLLBACK' before passing a connection to a new user,
but the problem was that ROLLBACK with no open transaction causes a
server log error message. We discussed adding 'ROLLBACK SILENT' to fix
this, but I believe a better, more portable solution is a simple "BEGIN
WORK;ROLLBACK". This will do nothing if there is no open transaction,
and will ROLLBACK any open transaction. I propose this be sent by PHP
as the first query when passing persistent connections.
As far as SET changes, does anyone on the PostgreSQL interfaces list
have a suggestion on how to RESET all session parameters? Seems we may
need to add this feature in to the backend.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-interfaces@postgresql.org
Cc: pgman@candle.pha.pa.us, thies@digicol.de, rasmus@php.net
Subject: Re: PostgreSQL and PHP persistent connections
In-Reply-To: <200102071912.OAA27530@candle.pha.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox