Re: Unique Index vs. Unique Constraint

From: Manfred Koizar <mkoi-pg(at)aon(dot)at>
To: "Thomas LeBlanc" <thomasatiem(at)hotmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Unique Index vs. Unique Constraint
Date: 2003-10-10 20:13:25
Message-ID: 4j4eov0nemlal2jup77ma5gf70rg9n2k8e@email.aon.at
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On Fri, 10 Oct 2003 13:59:38 -0500, "Thomas LeBlanc"
<thomasatiem(at)hotmail(dot)com> wrote:
>Does a Unique Constraint build a unique index?

Yes.

>What is the difference?

A constraint is an abstract concept, an index is an implementation
detail.

Servus
Manfred

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