RE: Oracle 9i vs 10g MV refresh behaviour
- From: "Freeman, Donald" <dofreeman@xxxxxxxxxxx>
- To: <piontekdd@xxxxxxxxx>, <smishra_97@xxxxxxxxx>
- Date: Wed, 5 Mar 2008 14:53:14 -0500
To get them to act like they did in 9i you have to use "Atomic Refresh"
in your refresh options.
Donald Freeman
Database Administrator II
Commonwealth of Pennsylvania
Department of Health
Bureau of Information Technology
2150 Herr Street
Harrisburg, PA 17103
dofreeman@xxxxxxxxxxx
_____
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Bradd Piontek
Sent: Wednesday, March 05, 2008 2:09 PM
To: smishra_97@xxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: Oracle 9i vs 10g MV refresh behaviour
Sanjay,
Yes, this is the default behavior in 10g and to modify it you need to
use the DBMS_MVIEW package (easy enough to script or write an anonymous
PL/SQL for). I personally like the change in behavior as it makes the
data more accessible (always had those users hitting the table while the
refresh was occuring and seeing empty rows).
I'm not sure what happens when you upgrade. I would guess the views
would work as they did in 9i and only work as the default if you changed
them or re-created them, but I could be wrong.
Bradd
On Wed, Mar 5, 2008 at 12:49 PM, Sanjay Mishra <smishra_97@xxxxxxxxx>
wrote:
Is it correct that upgrading from 9i to 10g will change the MV
refresh behaviour. I checked in one forum that it will use delete
command for complte refresh instead of Truncate. Has anybody seen this
issue. If this is true then Is there any parameter in init.ora that can
change the default behaiour of 9i like using Truncate. I checked the
forum and they are referring Atomic Refresh attribute in DBMS_mview can
revert the process but it is not good to modify several MV.
Is it only true when we move from 9i to 10g or also true if MV
are created in 10g itself.
TIA
Sanjay
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