Re: Strategy for Primary Key Generation When Populating Table

From: Rich Shepard <rshepard(at)appl-ecosys(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Strategy for Primary Key Generation When Populating Table
Date: 2012-02-10 00:28:21
Message-ID: alpine.LNX.2.00.1202091625510.5256@salmo.appl-ecosys.com
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On Thu, 9 Feb 2012, Merlin Moncure wrote:

> If you can't (which happens on various type of data), then the surrogate
> is giving the illusion of row uniqueness when there isn't one.

Ah, but each row is unique. However, there is no consisten set of non NULL
values that can consistently define a unique key for each row.

Rich

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