Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> comp.databases.theory -> Re: Negative Numbers in "Identity" or" Autonumber" fields

Re: Negative Numbers in "Identity" or" Autonumber" fields

From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Wed, 21 Mar 2007 20:59:47 GMT
Message-ID: <71hMh.13265$PV3.137028@ursa-nb00s0.nbnet.nb.ca>


Marshall wrote:

> On Mar 21, 9:38 am, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
> 

>>Marshall wrote:
>>
>>>On Mar 21, 8:28 am, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
>>
>>>>>>It has to have at least one possible representation.
>>
>>>>>Can you elaborate? Why does it need at least one?
>>>>>What breaks if it doesn't?
>>
>>>>How does one express any literal without at least one possible
>>>>representation?
>>
>>>Okay, sure, yes, that's a point. But that's more of a structural
>>>objection than a functional one. What breaks if a type doesn't
>>>have literals?
>>
>>The basic ability to specify a value.
>>
>>
>>>What about the model requires literals?
>>
>>A model for expressing values has to have a way to express them. I don't
>>think I understand your question.
>>
>>
>>>In the case of equality, I can point to what exactly breaks if
>>>a type doesn't support it: join. Specifically equijoin requires
>>>some kind of "equi-".
>>
>>>What breaks if a type doesn't have literals?
>>
>>Everything.
> 
> Hrm. Well, this is at worst circular and at best broad enough
> as not to be enlightening.
> 
> It's not particularly important if I don't get it, however; it's not
> a concept I care about at all.

How would you insert a new value if you have no literal for it? Received on Wed Mar 21 2007 - 15:59:47 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US