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Home -> Community -> Usenet -> comp.databases.theory -> Re: delete cascade

Re: delete cascade

From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Mon, 23 Apr 2007 21:32:43 GMT
Message-ID: <%B9Xh.27397$PV3.286036@ursa-nb00s0.nbnet.nb.ca>


paul c wrote:

> Bob Badour wrote:
>

>> paul c wrote:
>>
>>> Bob Badour wrote:
>>> ...
>>>
>>>> Would it suffice to declare the view using the RVA as above and then 
>>>> project away the RVA?
>>>
>>> I'm guessing that you mention rva's so that there can be no chance 
>>> that a product would be permitted to only partially complete the 
>>> operation, and leave some items dangling, whereas some products might 
>>> allow a series of delete statements to be interrupted?
>>
>> I mention it because it would fully disclose the data to be deleted, 
>> which is the invoice and the associated items.

>
> I can see that it would fully enclose, ie., enclose in one relation, but
> not sure how it would disclose any more fully than two selections and a
> join.
>
> Not trying to be picky but I found your view suggestion to be profound
> and want to make sure I understand this one.

I didn't refer to two selects and a join so I find your comment confusing. I was discussing a single delete that deletes both just as an "on delete cascade" trigger would delete both. Received on Mon Apr 23 2007 - 16:32:43 CDT

Original text of this message

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