From: | Henrique Pantarotto <scanner(at)cepa(dot)com(dot)br> |
---|---|
To: | Zakkr <zakkr(at)zf(dot)jcu(dot)cz> |
Cc: | pgsql-general(at)postgreSQL(dot)org |
Subject: | Re: [GENERAL] Trigger documentation? Need more examples.. pleeeze.. ; -) |
Date: | 1999-08-20 12:44:40 |
Message-ID: | 9908200953040H.00439@scanner.cepa.com.br |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
Zakkr,
I wonder if you read my message. I am aware of the examples in the contrib/spi
directory, but they aren't enough for me. I'm looking for a more specific
trigger documentation, or more trigger examples.
I would like to know how, from a trigger C function, can I get the "old" and
"new" value for an updated field. Is this possible? How do I do that?
For example, if I do:
update users set username = "clinton" where id = "2400"
When the trigger is activated, is it possible to compare the OLD value and NEW
value of the field "username"?
Did you understand? ;-)
Thanks!
> > I'm new to PostgreSQL, but I've been using MySQL/mSQL for a long time now.
I > > switched to PostgreSQL mostly because of it's features: triggers,
specially. > >
>
> Trigger examples ... why not:
> ..see a /postgresql-6.5.1/contrib/spi directory in PostgreSQL source package.
>
> Zakkr
--
Henrique Pantarotto
CEPAnet Internet Provider
webmaster / analista de sistemas
Email: scanner(at)cepa(dot)com(dot)br
Tel: (011) 5506-8477
Cel: (011) 9706-3444
LINUX FRIEND
From | Date | Subject | |
---|---|---|---|
Next Message | Dirk Lutzebaeck | 1999-08-20 13:24:32 | backend crashing with INTERSECT / ORDER BY |
Previous Message | Martin Weinberg | 1999-08-20 12:44:01 | Re: [GENERAL] [Fwd: Maximum filesize of one file] |