Re: RM's Canonical database
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Tue, 04 Jul 2006 03:37:36 GMT
Message-ID: <4olqg.5905$pu3.133892_at_ursa-nb00s0.nbnet.nb.ca>
>
> This organization had APP -> Middle Tier Code -> DBMS. I find that to be a
> pretty common setup.
Date: Tue, 04 Jul 2006 03:37:36 GMT
Message-ID: <4olqg.5905$pu3.133892_at_ursa-nb00s0.nbnet.nb.ca>
Ron Jeffries wrote:
> On 3 Jul 2006 09:40:46 -0700, "Alfredo Novoa" <alfredono_at_gmail.com> wrote:
>
>>>>In favor of putting a common rule in the DBMS is that it is centralized. The >>>>"Once and Only Once", or "DRY" principle suggests that it should be there. >>>> >>>>Another possibility for a location for such a rule is in a middle tier, where it >>>>can also meet the DRY principle. >>> >>>But then you lose the centralization. >> >>If "middle tier" has the usual meaning then the middle tier IS the >>DBMS.
>
> This organization had APP -> Middle Tier Code -> DBMS. I find that to be a
> pretty common setup.
Ron, I interpreted Alfredo's point as: If one creates a middle tier to perform database management functions, it necessarily becomes part of the database management system. 1) It is part of a system and 2) it performs database management. Received on Tue Jul 04 2006 - 05:37:36 CEST