From: Richard Huxton <dev@archonet.com>
To: mixo <mixo@coza.net.za>
Cc: pgsql-sql@postgresql.org
Subject: Re: Last insert id
Date: Wed, 09 Jun 2004 08:22:37 +0100
Message-ID: <40C6BABD.6060204@archonet.com> (raw)
In-Reply-To: <40C6AD19.70302@coza.net.za>
References: <40C6AD19.70302@coza.net.za>
mixo wrote:
> I have three tables which are related a serial field, table1_id, in on
> of the tables. Updating the tables is done through a transaction. My
> problem is, once I have insert a row in the first tables with
> table1_id, I need for the other two tables. How can I get this? Is it
> safe to use "select max(table1_id) from table1" after the insert?
A SERIAL column is just an ordinary integer with a default of
nextval(<sequence-name>).
All you need to do is:
INSERT INTO t1 (...) VALUES (...)
INSERT INTO t2 (...) VALUES (currval(<sequence-name-from-table1>)...)
Sequences are guaranteed to give values relevant to your current connection.
--
Richard Huxton
Archonet Ltd
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To: pgsql-sql@postgresql.org
Cc: dev@archonet.com, mixo@coza.net.za
Subject: Re: Last insert id
In-Reply-To: <40C6BABD.6060204@archonet.com>
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