Message-ID: <20020828163245.98872.qmail@web12901.mail.yahoo.com>
Date: Wed, 28 Aug 2002 18:32:45 +0200 (CEST)
From: =?iso-8859-1?q?friedrich=20nietzsche?= <nietzsche_psql@yahoo.it>
Subject: Re: Retrieving the new nextval...
To: pgsql-sql <pgsql-sql@postgresql.org>
MIME-Version: 1.0
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Hi all,
I'm in trouble with the same problem, but in PHP..
With your solution, I cannot be totally sure that last
inserted raw was mine...
Because I'm on a web page, it could be that, as soon
as I've inserted my record, another one do an
insertion, so I would get the wrong ID...
does transactions resolve this, in Psql???
I thought to solve it with a similiar solution,
working in transactions inserting a raw and
immedialtly after read from DB last raw, but who
assure me that all will go right??
If I was on a server app., I (and you, if it is your
case) would insert a timestamp, and then I'd select
from table where timestamp = mysavedtime;
But in my case there could be two or more equals
timestamp, cause there's not only one application
working with DB...
I'm still reading, searching, trying...
ciao
danilo


 --- Kevin Brannen <kevinb@nurseamerica.net> ha
scritto: > Greg Patnude wrote:
> > I am using postgreSQL with Perl::CGI and
> Perl::DBI::Pg... I would like to be
> > able to insert a row from my Perl script
> [$SQL->exec();] and have postgreSQL
> > return the id of the newly inserted record
> (new.id) directly to the Perl
> > script for further processing... Anyone with a
> solution / idea ???
> > 
> > Nearly EVERY table I create in postgreSQL (7.2)
> has the following minimum
> > structure:
> > 
> > create table "tblName" (
> > 
> >     id int4 primary key nextval
> ("tblName_id_seq"),
> > 
> >     ..field...
> > )
> 
> You can either do it in 2 statements, something
> like:
> 
> $dbh->do("insert into tblName ...");
> my ($id) = $dbh->selectrow_array("select
> currval('tblName_id_seq')");
> 
> Or you could create a function which takes the
> insert statement, and 
> ends with doing a select on the currval (as above)
> and returning that. 
> As I do the 2 statement approach above, I haven't
> done a function, but 
> it doesn't look like it would be that hard to do.
> 
> HTH,
> Kevin
R

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