Re: RUPD$_ (long)

From: Scott Shafer <sknd100_at_yahoo.com>
Date: Thu, 05 Jul 2001 07:39:19 -0700
Message-ID: <F001.00341A2D.20010705073649@fatcity.com>

April,

How's Amarillo lately? ;-)
The only useful thing I found was on metalink forum (I'm sure you've seen it) pasted below. Looks like a special log for UPDATABLE SNAPSHOTS, which would make sense in the context of 2 way replication.

Scott Shafer
San Antonio, TX

--------------begin--------------------------

Hi,
could somebody explain to me what's the funcionality of the RUPD$ tables and when they are created ?
The chapter covering the creation of snapshot logs also states the MLOG$ tables only.
Familiar with ORACLE version 8.0.5, i know the MLOG$ snapshot log tables only.
I went through the 8.1.7 documentation, but i did not find any explanation, just a short remark about looking for 'temporay updatable snapshots' by checking the existance of these RUDP$ tables. Additionaly i did not find any comment on these 'temporay updatable snapshots'.
Kind reagards

Robert Puskas

From: Oracle, Ken Robinson 17-Apr-01 17:33 Subject: Re : RUPD$ tables
There is very little available on this. It is part of the internals of replication and is only used for certain "rare" types of heterogenous replication.

Regards,
Ken Robinson
Oracle Server EE Analyst

From: Robert Puskas 18-Apr-01 13:50
Subject: Re : RUPD$ tables

Hi,
is it possible to get a more detailed information on this? Are these tables created per default during snapshot log creation or does the creation of these tables depend on some settings, which can be disbled or ...
What happens if they are deleted for example, does it then influnece the behaviour/functionality of fast refreshes? The current environment is a ORACLE 8.1.7 database server used as master of updatable and read only snapshots for several ORACLE Lite clients, both running Windows NT. Kind regards

Robert Puskas

From: Oracle, Ken Robinson 20-Apr-01 22:45 Subject: Re : Re : RUPD$ tables
There is very little data on this available and I'm not getting much information back from our Replication group either. The only information I got back so far from another analyst is "I know it gets created with the snapshot log beginning with Oracle8i whether it is for updatable snapshots or read only snapshots. It's some kind of 'temporary' table but I don't really know what it's used for during refresh?"
I'm trying to get more details.

Regards,
Ken Robinson
Oracle Server EE Analyst

From: NextGen BP 02-May-01 14:26
Subject: Re : RUPD$ tables
If I create the following snapshot specifying "with primary key" then a RUPD$_newtable table appears at the remote site over the database link where the master table resides. If I drop the materialised view and recreate the snapshot then the same happens only without a RUPD$_newtable table being created at the remote site over the database link where the master table resides. This would appear to be related to creating updateable snapshots. This table presumably records changes made at the snapshot site.

create snapshot newtable
pctfree 0
pctused 99
tablespace users
storage (initial 1M
next 1M
pctincrease 0)
using index tablespace users
storage (initial 128K
next 128K
pctincrease 0)
refresh fast
start with sysdate
next sysdate + 1/1440
with primary key
using local rollback segment RBK1_1
FOR UPDATE
as
SELECT column list....,
FROM master_user.new_table_at_database_link;

From: NextGen BP 02-May-01 14:38
Subject: Re : RUPD$ tables
re : my above note from NEXTGEN is wrong. I refered to "with primary key" instead of "FOR UPDATE" FOR UPDATE registers the snapshot as updateable of the master for posting changes back to the Master site. sorry about the typo
Des Fox BP NEXTGEN London

From: Oracle, Ken Robinson 04-May-01 17:50 Subject: Re : Re : RUPD$ tables

Interesting. This topic seems to come up every now and then and I'll refer others back to your findings.

Regards,
Ken Robinson
Oracle Server EE Analyst

-----------------------------end-------------------------------

April Wells wrote:
>
> Good Thursday morning!
>
> I have a nagging question that I can find only sketchy documentation on. I
> have been working with Materialized Views and their associated logs and have
> been trying to figure out what the RUPD$_<tablename> structures are for. I
> have watched those tables during incremental processing, during refresh of
> the MV and have done searches with VERY limited information back from
> anywhere in Oracle... metalink, technet... Those tables never have any rows,
> and they are very similar to the MLOG$_<tname> tables. Does anyone know
> what the purpose of these tables are... what they do... anything?
>
> Thanks
> April Wells
> Corporate Systems
> Amarillo Texas

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Received on Thu Jul 05 2001 - 09:39:19 CDT