Re: "All triggers are evil",..., really?
Date: Thu, 21 Aug 2008 17:17:55 +0200
All other(*) data constraints in my database design.
*: other = other than the ones that I can deal with declaratively.
- There can be at most one PRESIDENT in EMP table. - Everybody has less salary than his/her direct manager. - No department can have more than 30 employees. - Every department with a MANAGER, should also have an ADMINISTRATOR. - ...
On Thu, Aug 21, 2008 at 4:11 PM, Clarke, Andrew <andrew.clarke_at_logica.com>wrote:
> >> If all constraint validation is correctly 'tucked away' behind
> triggers, then all
> >> of your other application code (the 'business logic' code) can be
> devoid of
> >> constraint validation code
> What sort of validation would you want to do which can't be done by
> declarative constraints and which you also wouldn't want to include in the
> "'business logic' code"?
> Cheers, APC
> A P Clarke
> Software Architect
> Logica UK Public Sector Division
> Stephenson House
> 75 Hampstead Road
> NW1 2PL
> Direct Tel: +44 (0)207 230 3160
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-- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Toon Koppelaars RuleGen BV +31-615907269 toon_at_rulegen_dot_com www_dot_rulegen_dot_com Author: "Applied Mathematics for Database Professionals" -- http://www.freelists.org/webpage/oracle-lReceived on Thu Aug 21 2008 - 10:17:55 CDT