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Re: 2 distinct connections

From: Volkan YAZICI <yazicivo(at)ttnet(dot)net(dot)tr>
To: Martin Marques <martin(at)bugs(dot)unl(dot)edu(dot)ar>
Cc: pgsql-php(at)postgresql(dot)org
Subject: Re: 2 distinct connections
Date: 2006-05-27 14:40:30
Message-ID: 20060527144030.GC25675@alamut (view raw or flat)
Thread:
Lists: pgsql-php
On May 27 09:37, Martin Marques wrote:
> We're working on a project using PHP and PostgreSQL, mainly trying to work 
> in an OOP fashion. The project has quite a good amount of code, and a DB 
> Object called DB_Bib that has all the query methods. I also have a generic 
> DB object (DB_Main) which has code to establesh the connection, and from 
> which my DB_bib Inerits the DB connection.
> 
> The thing is that I made a new class called DB_Debug which also inherits 
> from DB_Main, and is there to have debugging data inserted into a table in 
> the database.
> 
> I noticed that when the two objects are started (they both call the 
> connection method using the same connection string) php doesn't 
> initiate to distinct connections, but 1 connection within commands from 
> both objects get passed to the DB server.
> 
> The problem is that query commands from the DB_Debug object and from the 
> DB_Bib object get mixed up in the same connection, making it deficult to 
> know when to make a commit.

As Cornelia Boenig suggested, you can force pg_connect() to establish a new
connection on every call. Also if you don't want to exhaust max_connections
limit, you can serialize queries using semaphores (or mutex).


Regards.

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