From: Passynkov, Vadim <Vadim.Passynkov@pathcom.com>
To: 'Erik Thiele' <erik@thiele-hydraulik.de>
To: Passynkov, Vadim <Vadim.Passynkov@pathcom.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: get sequence value of insert command
Date: Mon, 22 Nov 2004 09:58:29 -0500
Message-ID: <C8C8E7457059D5119E4700D0B765DCB8016AA912@sinope.inside.pathcom.com> (raw)
> > > create sequence mysequence;
> > >
> > > create table foo(
> > > id integer default nextval('mysequence'),
> > > bla text,
> > > wombat integer,
> > > foobar date,
> > > primary key(id)
> > > );
> > >
> > > insert into foo (wombat) values (88);
> > >
> > > now how do i know the id of my newly inserted element? and
> > > how can this be done in a completely concurrency safe way?
> >
> > CREATE RULE get_pkey_on_insert AS ON INSERT TO foo DO SELECT
> > currval('mysequence') AS id LIMIT 1;
>
> now that one is really great! you should definitly add it to the
> faq. plus an additional explanation why the limit 1 is needed here.
INSERT INTO foo ( ... ) ( SELECT * FROM foo1 );
>
> thanks!
> erik
>
--
Vadim Passynkov
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To: pgsql-sql@postgresql.org
Cc: Vadim.Passynkov@pathcom.com, erik@thiele-hydraulik.de
Subject: Re: get sequence value of insert command
In-Reply-To: <C8C8E7457059D5119E4700D0B765DCB8016AA912@sinope.inside.pathcom.com>
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