From: Andy Ballingall <andy@areyoulocal.co.uk>
To: 'Jaime Casanova' <systemguards@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Is it possible to redirect an update/insert/delete to a different table?
Date: Sun, 20 Nov 2005 15:40:41 -0000
Message-ID: <ECOWS02M7sInp0vS0DO0004c584@smtp-out2.blueyonder.co.uk> (raw)
In-Reply-To: <c2d9e70e0511200623w6e90d15bt64a03a2cfcd7132b@mail.gmail.com>
Hello Jaime,
I'm still not quite clear.
Say I have a number of different updates on a table 'apples' in my code,
including:
UPDATE apples set pips=6 and color='yellow' where id=3;
UPDATE apples set size=10 where id=6;
What would a rule look like which, when *any* update is attempted on the
apples table, will instead apply the update to a different table - 'pears'.
I get this far:
CREATE rule pears_instead_of_apples
AS ON UPDATE TO apples
DO INSTEAD UPDATE INTO pears .....;
What do I put where the ..... is, so that the rule will transparently update
the pears table with whatever values happened to be defined by the original
update command? Is there a special keyword that I've missed?
Regards,
Andy Ballingall
-----Original Message-----
From: Jaime Casanova [mailto:systemguards@gmail.com]
Sent: 20 November 2005 14:23
To: andy@areyoulocal.co.uk
Cc: pgsql-sql@postgresql.org
Subject: Re: Is it possible to redirect an update/insert/delete to a
different table?
> I've looked through rules, and as far as I can make out, they are only
> useful for explicit actions. I'm looking for something that behaves as
> though it simply substitutes the table name for a different table name
> before executing the command, no matter what the command looks like.
>
Make 3 rules (INSERT/UPDATE/DELETE), 4 if you want SELECT as well...
--
regards,
Jaime Casanova
(DBA: DataBase Aniquilator ;)
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To: pgsql-sql@postgresql.org
Cc: andy@areyoulocal.co.uk, systemguards@gmail.com
Subject: Re: Is it possible to redirect an update/insert/delete to a different table?
In-Reply-To: <ECOWS02M7sInp0vS0DO0004c584@smtp-out2.blueyonder.co.uk>
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