Re: atomic
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Fri, 02 Nov 2007 18:25:19 -0300
Message-ID: <472b95c3$0$14867$9a566e8b_at_news.aliant.net>
>> paul c wrote:
>>
>>> Roy Hann wrote:
>>>
>>>> "paul c" <toledobythesea_at_ooyah.ac> wrote in message
>>>> news:08HWi.167005$Da.137917_at_pd7urf1no...
>>>>
>>>>> If I may dodge the ordering question for now and continue with my
>>>>> casual graphics, how could a relation like the following be useful?
>>>>> (assuming one pizza per order and ignoring pizza size)
>>>>>
>>>>> PizzasOrdered:
>>>>>
>>>>> Order {Toppings}
>>>>> _____ __________
>>>>>
>>>>> 1 {Tomato, Sausage, Cheese}
>>>>> 1 {}
>>>>
>>>> If the predicate is something like "The kitchen is currently cooking
>>>> <order> pizzas with <toppings>", where <order> is a count. (i.e.
>>>> someone has ordered just a crust--my son would, and someone else has
>>>> ordered a proper pizza.) I could no doubt invent other possible
>>>> interpretations. My question is, what predicate did you intend me
>>>> to use when answering your question?
>>>
>>> I think your predicate is fine. I just don't see how both tuples
>>> might apply to same pizza.
>>
>> According to his predicate, they are different pizzas. If you intend
>> him to use a different predicate, perhaps you should specify the
>> predicate.
>
> But I specified one pizza per order!
Date: Fri, 02 Nov 2007 18:25:19 -0300
Message-ID: <472b95c3$0$14867$9a566e8b_at_news.aliant.net>
paul c wrote:
> Bob Badour wrote: >
>> paul c wrote:
>>
>>> Roy Hann wrote:
>>>
>>>> "paul c" <toledobythesea_at_ooyah.ac> wrote in message
>>>> news:08HWi.167005$Da.137917_at_pd7urf1no...
>>>>
>>>>> If I may dodge the ordering question for now and continue with my
>>>>> casual graphics, how could a relation like the following be useful?
>>>>> (assuming one pizza per order and ignoring pizza size)
>>>>>
>>>>> PizzasOrdered:
>>>>>
>>>>> Order {Toppings}
>>>>> _____ __________
>>>>>
>>>>> 1 {Tomato, Sausage, Cheese}
>>>>> 1 {}
>>>>
>>>> If the predicate is something like "The kitchen is currently cooking
>>>> <order> pizzas with <toppings>", where <order> is a count. (i.e.
>>>> someone has ordered just a crust--my son would, and someone else has
>>>> ordered a proper pizza.) I could no doubt invent other possible
>>>> interpretations. My question is, what predicate did you intend me
>>>> to use when answering your question?
>>>
>>> I think your predicate is fine. I just don't see how both tuples
>>> might apply to same pizza.
>>
>> According to his predicate, they are different pizzas. If you intend
>> him to use a different predicate, perhaps you should specify the
>> predicate.
>
> But I specified one pizza per order!
And in Roy's predicate, the 1 indicates how many pizzas with the given toppings. If each order has 1 pizza, the relation describes two orders. Received on Fri Nov 02 2007 - 22:25:19 CET