From: Richard Huxton <dev@archonet.com>
To: Ezequias Rodrigues da Rocha <ezequias.rocha@gmail.com>
Cc: PostgreSQL <pgsql-sql@postgresql.org>
Subject: Re: Inc
Date: Tue, 06 Mar 2007 17:13:29 +0000
Message-ID: <45EDA139.6070103@archonet.com> (raw)
In-Reply-To: <55c095e90703060855o228c0d0bm4b021826e3899ba5@mail.gmail.com>
References: <55c095e90703060855o228c0d0bm4b021826e3899ba5@mail.gmail.com>
Ezequias Rodrigues da Rocha wrote:
> Hi list,
>
> There is any function to increment with 1 some field.
>
> For example. I have a table with a field that on each update it
> incrementes a field that is allways configured to 0 before the
> starting of updates.
Something like:
CREATE FUNCTION my_autoinc() RETURNS TRIGGER AS $$
BEGIN
NEW.counter := NEW.counter + 1;
RETURN NEW;
END;
$$ LANGUAGE plpgsql;
CREATE TRIGGER my_counter_trig BEFORE UPDATE ON my_table
FOR EACH ROW EXECUTE PROCEDURE my_autoinc();
--
Richard Huxton
Archonet Ltd
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To: pgsql-sql@postgresql.org
Cc: dev@archonet.com, ezequias.rocha@gmail.com
Subject: Re: Inc
In-Reply-To: <45EDA139.6070103@archonet.com>
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