From: Richard Huxton <dev@archonet.com>
To: Jean-Luc Lachance <jllachan@nsd.ca>
Cc: pgsql-sql@postgresql.org
Subject: Re: Dublicates pairs in a table.
Date: Fri, 27 Sep 2002 17:37:43 +0100
Message-ID: <200209271737.43262.dev@archonet.com> (raw)
In-Reply-To: <3D94849E.4A769993@nsd.ca>
References: <000201c25d90$87230c10$6500000a@IT000>
<200209271354.54187.dev@archonet.com>
<3D94849E.4A769993@nsd.ca>
On Friday 27 Sep 2002 5:17 pm, Jean-Luc Lachance wrote:
> What's wrong with
> CREATE UNIQUE INDEX foo_both_uniq ON foo(a,b);
> ???
Because he specifically wanted values of ('a','b') and ('b','a') to be treated
as equivalent (see quote).
> > > INSERT INTO test (c1,c2) VALUES('a','c');
> > > INSERT INTO test (c1,c2) VALUES('c','a');
Note Stephen Szabo's observation that I'd missed the obvious need for some
separator so ('a','ab') is different from ('aa','b') - Doh!
- Richard Huxton
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To: pgsql-sql@postgresql.org
Cc: dev@archonet.com, jllachan@nsd.ca
Subject: Re: Dublicates pairs in a table.
In-Reply-To: <200209271737.43262.dev@archonet.com>
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