Re: Empty date

On Thu, Mar 31, 2005 at 09:43:27AM +0300, Andrus wrote:

> Empty data is a date which is less that all other dates.

Why would that be ? "<Empty> of type <unknown>" cannot be less
than (nor more than nor equal to) "<not empty> of type <date>".
If you want to express the valid idea of "<less-than-anything>
of type <date>" you are better off using a logical construct
tailored for that purpose. It may help to use "<4734-01-01 BC> of
type <date>" or some such. However the best would be to use
"-infinity". See the docs.

Karsten
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