You are running into a primary point of contention between many DBA's and
developers. Dev's don't like the use of PK/FK relationships within the
database because it is not always portable across multiple RDBMS's. By
making the app handle all the referential integrity issues they can say
"Yes, our system runs on Oracle, Sybase, Informix, MS SQL Server, or even
Access ...." All they need the RDBMS to do is store tables and indexes then.
Many third party apps use this approach. The problem is when their code is
correct and perfect, they are right. You don't NEED FK's. However I have
yet to run across any super human developer that codes everything perfectly.
What happens... you get duplicate key values and child tables filled with
orphans because somewhere in the code a restriction was missed. By
assigning these at the DB level you can forget about having to maintain it
in the app. The RDBMS does it for you. Push for RDBMS level control of
this. It will save you many headaches later over data corruption.
Rodd Holman
-----Original Message-----
Sent: Monday, March 19, 2001 12:05 PM
To: Multiple recipients of list ORACLE-L
Hi all:
We have a situation where are no relationships are
defined at the database level. i.e no foreign keys
constraints have established at the Database. The
application is still at the Development Stage.
Everything is controlled at the application level.
I as the DBA appose this design for Data security and
also cannot reverse engineer from the tables into
Designer.
Can you please share you pros / Cons.
Thanks
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