Re: PostgreSQL roadmap for 8.2 and beyond.

On Mon, Oct 17, 2005 at 09:12:35AM -0400, Dave Cramer wrote:
> I fail to see how this solves the problem of getting auto generated
> keys.
>
> AFAIKS, the protocol needs to be tweaked to return at a minimum the
> currval for the first serial in the row, but more correctly all of
> the modified currval's for an insert

In what sense? It seems to do exactly what you want. The example in the
documentation is:

INSERT INTO films (title) VALUES ('Yojimbo') RETURNING film_id;

film_id
---------
123

The protocol allows you to return a result set for any command already
so I don't think there's any protocol changes at all. You don't even
need to know the name of the sequence which is something I wasn't even
hoping for. Well done...

> if we had that then we could correctly implement getAutoGeneratedKeys
> for jdbc.

There is a function now to return the sequence associated with a table
so I think this would be quite straightforward actually, assuming you
know the table being operated on.

Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.