Re: Getting the OID of inserted row in a rule

On Wed, Sep 22, 2004 at 04:30:06PM +0100, Bradley Kieser wrote:
> Michael Fuhr wrote:
>
> >CREATE RULE v_ins AS ON INSERT TO v DO INSTEAD (
> > INSERT INTO a (xxx) VALUES (NEW.xxx);
> > INSERT INTO b (col1, col2, col3) VALUES (NEW.col1, NEW.col2,
> > currval('a_id_seq'))
> >);
>
> But what if another insert happens in the mean time? Then the sequence
> would have advanced that the data will be scrambled. |Given that this
> could be a very active dataset, that situation is almost certain to occur.

currval() returns the last value returned by nextval() in *this session*.

http://www.postgresql.org/docs/7.4/static/functions-sequence.html
http://www.postgresql.org/docs/faqs/FAQ.html#4.15.3

Do you have multiple processes or threads sharing the same connection?
Perhaps one of the developers can comment on the possibility of a race
condition in that case.

--
Michael Fuhr
http://www.fuhr.org/~mfuhr/