Re: Ref to last INSERT on a table without OIDs?

> -----Original Message-----
> From: Stephan Szabo [mailto:sszabo(at)megazone23(dot)bigpanda(dot)com]
> Sent: 28 January 2003 16:14
> To: Mark Cave-Ayland
> Cc: pgsql-general(at)postgresql(dot)org
> Subject: Re: [GENERAL] Ref to last INSERT on a table without OIDs?
>
>
> On Tue, 28 Jan 2003, Mark Cave-Ayland wrote:
>
> > Hi there,
> >
> > Hopefully just a quick one: how is it possible to obtain a reference
to
> > the last inserted record in a table which is created without oids? I
> > would like to dump/restore some of our larger tables so they don't
use
> > oids, however I am concerned that simply getting the current PK
sequence
> > value after insertion within a transaction is not safe when many
people
> > are accessing the table/sequence at once? Can anyone clarify this?
We're
> > using the latest and greatest 7.3.1.
>
> If you use currval() to get the sequence value it'll be the last value
> given to your session so you don't have to worry about other sessions
> modifying the sequence.

Hi Stephan,

Thanks for your reply! But I'm still a little confused by what defines a
session - is it a transaction or a backend? I'm just thinking about
connections from web pages which use PHP pooled connections..... if a
session is a transaction then I'm guessing everything should work fine
without any problems?

Cheers,

Mark.

---

Mark Cave-Ayland
Webbased Ltd.
Tamar Science Park
Derriford
Plymouth
PL6 8BX
England

Tel: +44 (0)1752 764445
Fax: +44 (0)1752 764446

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