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RE: Re[2]: What Sort of Privilege?

From: Cary Millsap <cary.millsap_at_hotsos.com>
Date: Tue, 24 Aug 2004 09:35:17 -0500
Message-ID: <009601c489e7$975b99f0$6e01a8c0@CVMLAP02> 





Aren't the new Oracle E-Business applications moving to a
single-schema-for-everything model?




Cary Millsap


Hotsos Enterprises, Ltd.


http://www.hotsos.com


* Nullius in verba *



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-----Original Message-----


From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]
On Behalf Of Goulet, Dick


Sent: Tuesday, August 24, 2004 8:50 AM


To: oracle-l_at_freelists.org


Subject: RE: Re[2]: What Sort of Privilege?



On this issue it would appear so!!  ;-)



Dick Goulet


Senior Oracle DBA


Oracle Certified 8i DBA



-----Original Message-----


From: Mercadante, Thomas F [mailto:thomas.mercadante_at_labor.state.ny.us]
Sent: Tuesday, August 24, 2004 9:16 AM


To: 'oracle-l_at_freelists.org'


Subject: RE: Re[2]: What Sort of Privilege?




Dick,



Am I 100% wrong?  :)



Tom Mercadante


Oracle Certified Professional




-----Original Message-----


From: Goulet, Dick [mailto:DGoulet_at_vicr.com]=20
Sent: Tuesday, August 24, 2004 9:12 AM


To: oracle-l_at_freelists.org


Subject: RE: Re[2]: What Sort of Privilege?




Tom,



        Sorry, but you are wrong.  I prefer the many schema method as well.



Dick Goulet


Senior Oracle DBA


Oracle Certified 8i DBA



-----Original Message-----


From: Mercadante, Thomas F [mailto:thomas.mercadante_at_labor.state.ny.us]
Sent: Tuesday, August 24, 2004 8:21 AM


To: 'oracle-l_at_freelists.org'


Subject: RE: Re[2]: What Sort of Privilege?




Jo,



Well,  The Oracle Apps applications have many schema's - much like what =


=3D



you described. I'm guessing that the majority of home-grown applications
have only one schema for all of the tables.  I could be wrong.  In my =
view,


it is =3D easier to manage.  Everything is in one place.  It prevents =
you from


creating =3D two database objects with the same name.  Managing security =
is


easier - =3D again, you can issue all your grants from one schema, =
rather than


needing to =3D keep re-logging in.



Maybe it's just me!



Tom Mercadante


Oracle Certified Professional




-----Original Message-----


From: jo_holvoet_at_amis.com [mailto:jo_holvoet_at_amis.com]=3D20
Sent: Tuesday, August 24, 2004 8:13 AM


To: oracle-l_at_freelists.org


Cc: 'oracle-l_at_freelists.org'; oracle-l-bounce_at_freelists.org
Subject: RE: Re[2]: What Sort of Privilege?




Hi Tom,



we (well, it was in place before I got here, but anyway) basically =
have=3D20


one schema per application. We also have one schema which houses =3D
"common"=3D20 data, i.e. data used in many different places/apps; e.g.
employees,=3D20 customers, products, plants, .... So we have many =
cross-schema


FKs to =3D the=3D20 "common" data but outside that everything is pretty =
well


partitioned.=3D20 Maybe that's why I've never really had any problems =
with it.



Is having what is basically a one-schema database common practice ?



mvg/regards



Jo








"Mercadante, Thomas F" <thomas.mercadante_at_labor.state.ny.us>
Sent by: oracle-l-bounce_at_freelists.org


08/24/2004 14:03


Please respond to oracle-l



=3D20


        To:     "'oracle-l_at_freelists.org'" <oracle-l_at_freelists.org>
        cc:=3D20
        Subject:        RE: Re[2]: What Sort of Privilege?






Jo,



I guess I should clarify.



If you made a consious decision to maintain multiple schema's within =3D =
your


database, then it is your choice.



I prefer one schema holding all of the database tables that make up the
corporate-wide application.



Tom Mercadante


Oracle Certified Professional




-----Original Message-----


From: jo_holvoet_at_amis.com [mailto:jo_holvoet_at_amis.com]=3D20
Sent: Tuesday, August 24, 2004 7:58 AM


To: oracle-l_at_freelists.org


Cc: 'oracle-l_at_freelists.org'; oracle-l-bounce_at_freelists.org
Subject: RE: Re[2]: What Sort of Privilege?




Not sure about that. We have for example an employee table that is=3D20
referenced just about everywhere (e.g. which salesperson is =
responsible=3D20


for this customer, which employee registered for this training =
course,=3D20


which operator filed this incident report, ...). These are all different =


=3D




apps/schemas referencing this table so I don't see how we can avoid=3D20
cross-schema FKs.



mvg/regards



Jo








"Mercadante, Thomas F" <thomas.mercadante_at_labor.state.ny.us>
Sent by: oracle-l-bounce_at_freelists.org


08/24/2004 13:49


Please respond to oracle-l



=3D20


        To:     "'oracle-l_at_freelists.org'" <oracle-l_at_freelists.org>
        cc:=3D20
        Subject:        RE: Re[2]: What Sort of Privilege?






Peter,



I totally agree with you.  Allowing Fk references from outside of =
the=3D20


schema is inviting confusion, duplication and disaster.  There is really =
no


=3D good reason for it.




Tom Mercadante


Oracle Certified Professional




-----Original Message-----


From: Peter Robson [mailto:pgro_at_bgs.ac.uk]=3D20
Sent: Tuesday, August 24, 2004 4:57 AM


To: Jackie Brock


Cc: oracle-l_at_freelists.org


Subject: Re[2]: What Sort of Privilege?




Whoa there everybody!



While the answer is quite correct, of course (I read the FM years =
ago),=3D20


what has not been raised is the danger of allowing reference to multiply
unhindered across numerous schemas.



Be very careful if you choose to do this, otherwise, without a =
little=3D20


care, you may manage to lock your entire database solid with conflicting
FKs!



We did, learned our lesson, and now reference is ONLY permitted within =


=3D the



one corporate schema.




peter


edinburgh


.............




JB> references




JB> All,



JB> what kind of privilege new for creating a FK constraint which=3D20=20
JB> reference table belongs to another schema.


JB> ALTER TABLE PAM.table1
JB>  ADD CONSTRAINT FKCONS1
JB>  FOREIGN KEY (ID)
JB>  REFERENCES schema1.table2 (ID2);





JB> I have grant select,insert,update,delete for table2 BUT still I=20
JB> get=3D20 insufficient privilege. any idea?




JB> Hamid Alavi




--=3D20


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Received on Tue Aug 24 2004 - 09:32:27 CDT












Original text of this message













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