RE: Buffer gets

From: <>
Date: Thu, 21 Apr 2011 09:12:17 +0100

And RELY of course, if appropriate, for the optimizer's benefit.

From: [] On Behalf Of Chitale, Hemant Krishnarao Sent: 21 April 2011 04:04
Subject: RE: Buffer gets


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: [] On Behalf Of Hemant K Chitale Sent: Thursday, April 21, 2011 9:02 AM
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" <<>> 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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Received on Thu Apr 21 2011 - 03:12:17 CDT

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