RE: Materialized Views
- From: "Michael Fontana" <mfontana@xxxxxxxxxxx>
- To: <Lee.Robertson@xxxxxxxxxx>
- Date: Tue, 23 Dec 2008 14:18:49 -0600 (CST)
You need to know more about a feature before you can truly decide it's
required.
Perhaps you can tell us a bit more about your business problem, and how
you intend to solve it.
I've seen shops where they've created materialized views on local
objects. While it's allowed and there may be some valid reasons for it,
often there are not. MVs are most often used to create distributed
versions of data. The biggest gotcha that comes to mind is the
restrictions on query sub-selects as cited in the manuals (Which I notice
someone else sent a link for). The other most obvious problem is having a
foolproof monitoring system to detect MV build and refresh failures.
_____
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Robertson Lee - lerobe
Sent: Tuesday, December 23, 2008 11:58 AM
To: oracle-l
Subject: Materialized Views
Oracle 10g R2
Hi,
Anyone point me in the direction of some good reading material with
respect to the above please. Looks like we may be attempting to use these
for some complex aggregtations in some databases. Any gotchas/restrictions
etc. would be much appreciated.
TIA
Lee
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