RE: Buffer gets
Date: Thu, 21 Apr 2011 09:12:17 +0100
Message-ID: <853BE8E3785A554D92010F1FB6C0B279AE3E9E1D_at_LDNPCMMGMB11.INTRANET.BARCAPINT.COM>
And RELY of course, if appropriate, for the optimizer's benefit.
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Chitale, Hemant Krishnarao Sent: 21 April 2011 04:04
To: joe_dba_at_hotmail.com
Cc: oracle-l_at_freelists.org
Subject: RE: Buffer gets
See http://download.oracle.com/docs/cd/E11882_01/server.112/e16579/constra.htm#i1006394
FOREIGN KEY Constraints in a Data Warehouse
"............................. .............................. ..............................
ENABLE NOVALIDATE can quickly create an enforced constraint, even when the constraint is believed to be true. Suppose that the ETL process verifies that a FOREIGN KEY constraint is true. Rather than have the database re-verify this FOREIGN KEY constraint, which would require time and database resources, the data warehouse administrator could instead create a FOREIGN KEY constraint using ENABLE NOVALIDATE."
Hemant K Chitale
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Hemant K Chitale Sent: Thursday, April 21, 2011 9:02 AM
To: joe_dba_at_hotmail.com
Cc: c
Subject: Re: Buffer gets
You could ENABLE .... NOVALIDATE if you are 100% sure that the data was validared during ETL.
This is somewhere in the Datawarehousing Guide in the documentation.
Hemant K Chitale
sent from my smartphone
On 21 Apr 2011 03:04, "Joe Smith" <joe_dba_at_hotmail.com<mailto:joe_dba_at_hotmail.com>> wrote:
> After a direct path load. Enable FK cons with:
>
> Alter table enable con con_name exceptions into exceptions table
>
>
> Thanks
>
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