From: Robert Treat <xzilla@users.sourceforge.net>
To: pgsql-sql@postgresql.org
Subject: partial unique constraint
Date: 06 Apr 2004 10:29:32 -0400
Message-ID: <1081261772.31785.48.camel@camel> (raw)
Trying to come up with the proper syntax to meet the following criteria:
create table foo (bar integer, baz boolean UNIQUE (bar, baz = true));
note the above syntax is not correct, but should demonstrate what i'm
trying to do; I want to add a unique constraint such that we only allow
one case of bar and baz = true... i can have unlimited bar and baz =
false, and there can be multiple bar and baz = true if the bars are
different... did some doc reading and mail list searching but a valid
syntax for this seems to be escaping me...
btw I'm pretty sure I could do this with an external trigger, but am
wondering about a constraint oriented approach
Robert Treat
--
Build A Brighter Lamp :: Linux Apache {middleware} PostgreSQL
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: xzilla@users.sourceforge.net
Subject: Re: partial unique constraint
In-Reply-To: <1081261772.31785.48.camel@camel>
* 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