Re: server variables ?

From: "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>
To: pgsql-novice(at)postgresql(dot)org
Subject: Re: server variables ?
Date: 2007-04-12 05:07:34
Message-ID: 20070412050734.GA27660@a-kretschmer.de
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am Thu, dem 12.04.2007, um 5:33:30 +0200 mailte Andreas folgendes:
> Hi,
>
> are there something like variables on the server-side that can be set by
> the client?
>
> e.g. I'd like to store the user-id who created or updated a record.
> I've allready got a trigger that sets a timestamp whenever a record is
> updated. It was cute if I could let this triggers store the user-id, too.

If you mean with user-id the name of the current user, just use
current_user.

>
> I'd like to open a connection when the client application starts.
> The client should set a variable userid within this connection and
> every trigger would know who uses this connection right now.
>
> BTW ... How would I use this variable as a DEFAULT value when it should
> be set just at the creation time of the record?
> something like a collumn:
> ...
> created_by_fk integer not null default userid,
text default current_user

> ...
>
> How could I use such a variables value in views?

select ... from your_view where created_by_fk = current_user

Andreas
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Andreas Kretschmer
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