Re: The wisdom of the object mentors (Was: Searching OO Associations with RDBMS Persistence Models)

Robert Martin wrote:
> On 2006-06-01 03:48:55 +0200, J M Davitt <jdavitt_at_aeneas.net> said:
>

>> Using file systems to make your point is a very poor choice.  Take a 
>> file, copy it over there.  Identical content, different paths.  Which
>> is "real?"  Which is a copy?   Which one should I modify if I want
>> my changes to persist?  How do Suzie and Bob and Joey and Ron know
>> which is the one I scribbled in?  What's keeping track of that?  A
>> file system?  No way!
>>
>> These, and other, questions become de minimis in the relational model.

Duplicate rows in the same table are absolutely prohibited.

Duplicate tables? Like two tables named CUSTOMER? Not in the same database.

If you think I was suggesting that the same value can't appear in more than one attribute, you missed the point.

> In any case, would you rather that your laptop prevented you from making
> copies of your files?

What's the point of making a copy? Increased entropy? Received on Thu Jun 08 2006 - 15:34:41 CEST