Re: no names allowed, we serve types only

From: Bob Badour <>
Date: Wed, 24 Feb 2010 10:08:15 -0400
Message-ID: <4b8532d4$0$26973$>

Jan Hidders wrote:

> On 23 feb, 18:08, David BL <> wrote:

>>On Feb 23, 5:28 pm, Jan Hidders <> wrote:
>>>On 23 feb, 01:33, David BL <> wrote:
>>>>On Feb 23, 12:49 am, Jan Hidders <> wrote:
>>>>>On 22 feb, 15:39, Jan Hidders <> wrote:
>>C.Date presents this argument very well in section 20.9 of an
>>Introduction to Database Systems where he claims that a coloured
>>circle is not a subtype of circle (or vice versa).

> The tuple that represents the circle is not the same thing as the
> circle itself. I find Date's argument rather unconvincing, to put it
> very mildly. He is by no means an authority in this area, and those
> that are mostly disagree with this position.

Since when do you find argumentum ad verecundiam convincing? Hmmm? [peers over rim of eyeglasses] Received on Wed Feb 24 2010 - 15:08:15 CET

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