From: Jeff Boes <jeff@endpoint.com>
To: pgsql-sql@postgresql.org
Subject: Foreign key with check?
Date: Wed, 27 Jul 2005 16:08:19 -0400
Message-ID: <42E7E9B3.4080500@endpoint.com> (raw)
Given a table like this:
create table primary (
a integer primary key,
b boolean
);
And another like this:
create table secondary (
a integer,
some_other_fields
);
I would like a foreign key constraint on the "secondary" table that
looks something like:
foreign key (a, true) references primary (a, b)
That is, a row in "secondary" is allowed to reference a row in "primary"
if and only if that referenced row has (b = true).
I think I have to do this with an additional trigger. Any other options?
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: jeff@endpoint.com
Subject: Re: Foreign key with check?
In-Reply-To: <42E7E9B3.4080500@endpoint.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox