Perhaps that would be a better way of putting it.
RF
Robert G. Freeman - Oracle OCP
Oracle Database Architect
CSX Midtier Database Administration
Author
Oracle9i RMAN Backup and Recovery (Oracle Press - Oct 2002)
Oracle9i New Features (Oracle Press)
Mastering Oracle8i (Sybex)
Clark Griswold: Eddie, has anyone ever told you that you're bad luck?
Cousin Eddie: Those were my mother's dying words. But I
guess if your body's covered in third degree burns, and
your foot's caught in a bear trap, you tend to start talkin'
crazy.
-----Original Message-----
Sent: Friday, July 19, 2002 5:31 PM
To: Multiple recipients of list ORACLE-L
I'm not sure if "done away with" is the appropriate
term for fk locking, maybe the time exposed to locking
is reduced in 9i is better ?
hth
connor
- "Freeman, Robert" <Robert_Freeman_at_csx.com> wrote:
> Well, that depends on if the FK is enforced or not
> too. There should be
> minimal
> performance impact with an unenforced FK with
> regards to inserts.
> In a DW FK's are often present but not enforced.
> Unenforced FK's in DW's are
> used for a number of reasons, query rewrite among
> them.
>
> Some of the old performance and locking issues with
> FK's were done away with
> in 9i.
>
> What
>
> Robert G. Freeman - Oracle OCP
> Oracle Database Architect
> CSX Midtier Database Administration
> Author
> Oracle9i RMAN Backup and Recovery (Oracle Press -
> Oct 2002)
> Oracle9i New Features (Oracle Press)
> Mastering Oracle8i (Sybex)
>
> Clark Griswold: Eddie, has anyone ever told you that
> you're bad luck?
> Cousin Eddie: Those were my mother's dying words.
> But I
> guess if your body's covered in third degree burns,
> and
> your foot's caught in a bear trap, you tend to start
> talkin'
> crazy.
>
>
>
> -----Original Message-----
> Sent: Thursday, July 18, 2002 2:44 PM
> To: Multiple recipients of list ORACLE-L
>
>
> Terrible expecially on inserts into the database, it
> may have to do a full
> table scan to insert one record. Don't do it.
>
>
> >From: "Shishir Kumar Mishra" <shishir_at_agnisoft.com>
> >Reply-To: ORACLE-L_at_fatcity.com
> >To: Multiple recipients of list ORACLE-L
> <ORACLE-L_at_fatcity.com>
> >Subject: Unindexed foreign key
> >Date: Thu, 11 Jul 2002 04:13:36 -0800
> >
> >Hi Gurus!
> >How does the unindexed foreign key affect the
> performance ?
> >
> >regards....
> >Shishir Kumar Mishra
> >Agni Software (P) Ltd.
> >www.agnisoft.com
> >----------------------------------
> >Vidya Dadaati Viniyam
> >----------------------------------
> >
> >
>
>
>
>
> Over and out Basher 59
>
>
>
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Received on Mon Jul 22 2002 - 13:18:46 CDT
