From: Andreas Kretschmer <akretschmer@spamfence.net>
To: pgsql-sql@postgresql.org
Subject: Re: Is it possible to redirect an update/insert/delete to a different table?
Date: Sun, 20 Nov 2005 17:17:15 +0100
Message-ID: <20051120161715.GA2832@kaufbach.delug.de> (raw)
In-Reply-To: <ECOWS02MmWL9vVmguzY0004c4cf@smtp-out2.blueyonder.co.uk>
References: <200511201207.01114.peter_e@gmx.net>
<ECOWS02MmWL9vVmguzY0004c4cf@smtp-out2.blueyonder.co.uk>
Andy Ballingall <andy@areyoulocal.co.uk> schrieb:
> Hello Peter,
>
> I'm glad it's possible, but I can't see how from the documentation.
>
> Say if I have a table called 'apples' and a table called 'pears'.
>
> What would the rule look like that would remap all updates on apples so that
> they were applied to pears instead?
create rule apples_pears_update as on update to apples do instead update pears set name= NEW.name where id=NEW.id ;
test=# select * from apples ;
id | name
----+------
1 | a
(1 row)
test=# select * from pears ;
id | name
----+------
1 | b
(1 row)
test=# update apples set name = 'c' where id = 1;
UPDATE 1
test=# select * from pears ;
id | name
----+------
1 | c
(1 row)
http://www.postgresql.org/docs/8.1/interactive/rules-update.html
HTH, Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect. (Linus Torvalds)
Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°
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To: pgsql-sql@postgresql.org
Cc: akretschmer@spamfence.net
Subject: Re: Is it possible to redirect an update/insert/delete to a different table?
In-Reply-To: <20051120161715.GA2832@kaufbach.delug.de>
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