From: | Peter Eisentraut <e99re41(at)DoCS(dot)UU(dot)SE> |
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To: | Stan Jacobs <jacobs(at)jtek(dot)com> |
Cc: | pgsql-general(at)postgreSQL(dot)org |
Subject: | Re: [GENERAL] Simple problem? |
Date: | 2000-03-02 15:17:30 |
Message-ID: | Pine.GSO.4.02A.10003021614480.27493-100000@Dront.DoCS.UU.SE |
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Thread: | |
Lists: | pgsql-general |
On Wed, 1 Mar 2000, Stan Jacobs wrote:
> I must be confusing my syntax somehow, because I'm having trouble doing a
> simple update with returned id... As in.... I have two tables: an order
> table and an orderitems table. I need to write the order record, then use
> the order_id from the order record in the insert to the orderitems record.
I assume you're using serial columns here. Table schemas always help ...
> 1. Can I use a transaction begin/end for the entire transaction if I need
> to get the order_id in between the two writes?
Sure.
> 2. How do I get the order_id from the record I just wrote?
You have to select it back out. A select on max(order_id) might do, but
you might get caught if someone else does updates on your table as well. I
am personally not so fond of serial columns because of this problem.
--
Peter Eisentraut Sernanders väg 10:115
peter_e(at)gmx(dot)net 75262 Uppsala
http://yi.org/peter-e/ Sweden
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