Re: transactional shared variable in postgresql

Check this one
http://archives.postgresql.org/pgsql-patches/2004-04/msg00280.php

I have not personally worked on what is described in this page but someone will
correct you in the community if anything is going wrong here.

--Imad
www.EnterpriseDB.com

On 11/19/06, Rajesh Kumar Mallah <mallah(dot)rajesh(at)gmail(dot)com> wrote:
>
>
> On 11/19/06, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > "Rajesh Kumar Mallah" <mallah(dot)rajesh(at)gmail(dot)com> writes:
> > > In our webapps, we use the same username to connect to the database
> > > for all kind of updates. Hence we are not able to makeout whoo modified
> > > what . However at application level we have different "userid" for
> different
> > > users of the system. we want to somehow pass this "userid" to the
> databasee
> > > server and accesss it from the triggers that implement the audit
> functions.
> >
> > Perhaps it would be better to make your "userid" be the actual database
> > user? But anyway, the custom GUC variable facility might serve your
>
> Hi,
>
> wouldnt' it affect the connection pooling , i am using DBI::Cache and
> mod_perl ?
>
> > needs.
> >
> http://www.postgresql.org/docs/8.1/static/runtime-config-custom.html
>
>
> i dont think i understand the usage properly,
>
> i did the below postgresql.conf
> custom_variable_classes = 'general' # list of custom variable
> class names
> general.employee = ''
>
> am i supposed to see the variable general.employee when i do "show all " ?
> i did not see it in fact!
>
> my question is how can i set it and read it
>
> regds
> Mallah.
>
>
> > regards, tom lane
> >
>
>