From: Oliver Elphick <olly@lfix.co.uk>
To: Kenneth Gonsalves <lawgon@thenilgiris.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: surrogate key or not?
Date: Sun, 08 Aug 2004 02:06:36 +0100
Message-ID: <1091927196.13140.174.camel@linda> (raw)
In-Reply-To: <0408070930300J.01190@thenilgiris.com>
References: <1090325769.3241.27.camel@dicaprio.akademie1.de>
<41026D55.3040002@zara.6.isreserved.com>
<200408061542.04336.josh@agliodbs.com>
<0408070930300J.01190@thenilgiris.com>
On Sat, 2004-08-07 at 05:00, Kenneth Gonsalves wrote:
> why shouldnt the primary key change? the only key that should never change is
> a key that is used as a foreign key in another table. In a table like this:
>
> id serial unique
> name varchar primary key
>
> name may change - id will never change. id is used as the foreign key
It can change if you use ON UPDATE CASCADE in the foreign key
definitions.
--
Oliver Elphick olly@lfix.co.uk
Isle of Wight http://www.lfix.co.uk/oliver
GPG: 1024D/A54310EA 92C8 39E7 280E 3631 3F0E 1EC0 5664 7A2F A543 10EA
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To: pgsql-sql@postgresql.org
Cc: olly@lfix.co.uk, lawgon@thenilgiris.com
Subject: Re: surrogate key or not?
In-Reply-To: <1091927196.13140.174.camel@linda>
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