Re: boolean datatype ... wtf?
Date: Wed, 29 Sep 2010 11:03:43 -0300
Message-ID: <4ca3473b$0$14790$9a566e8b_at_news.aliant.net>
paul c wrote:
> On 29/09/2010 4:51 AM, Paul Mansour wrote:
> ...
>
>> What is the problem with a Boolean data type?
>> .
>> It is fundamental - so fundamental that in TTM it is the only
>> required scalar data type: “We require that at least one built-in
>> scalar type be supported : Namely, type “Boolean” (BOOLEAN in Tutorial
>> D”).
>>
>> Date and Darwen go on to give the obvious reasons for this.
>>
>> The fact that DEE and DUM may be interpreted as TRUE and FALSE is not
>> relevant. The result of A=B or A>B is not a relation.
>
> Aren't A=B and A>B relations?
They are neither more nor less relations than X*X + Y*Y + Z*Z = R*R is a relation.
But what does it mean to be the result of a relation? Received on Wed Sep 29 2010 - 16:03:43 CEST