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Re: [Gnumed-devel] Demographics schema - urb postcode not null

From: Karsten Hilbert
Subject: Re: [Gnumed-devel] Demographics schema - urb postcode not null
Date: Sat, 8 Oct 2011 13:08:14 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Sat, Oct 08, 2011 at 12:59:41PM +0200, Hilbert, Sebastian wrote:

> I was under the impression that NULL can be different from unkown.

What, then, NULL is ?

> While being NULL it is not enforced uknown is something that can be enforced.

Only if one explicitely models <unknown> as some dummy value
(-1, maxint, infinity, 00.00.0000, 'unknown' or similar crap).

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