Multiversions in Materialized View Replication Environment

Dear friends
In my company we have a matarialized view environment where A materialized view, in snapshot site, contains a complete or partial copy of a target master - master site.
This environment is in Oracle 8i Enterprise Edition and now we are increasing it. We are shrinking our budget and then i'm research an solution more cheaper, i found Oracle 10G Database Standard Edition One, an solution desinged for small to medium environments. My thought is to use Oracle 10G SE1 for news snapshot sites.
Can someone talk about the user of differents versions (8i mastersite X 10G snapshotsite) in a Materialized View Replication Environment, is it possible? must i upgrade all my environment replication for 10G or to use multiversions ?
Thanks !!

10g to 8i can work, assuming
- 8i = 8.1.7
- You are applying at least the 8.1.7.4 patchset to the master (8i) or you are applying the latest patchset to the slave (10g). Realistically, you probably want to do both.
If you are talking about using the standard edition, I assume that you are only doing basic replication, not multi-master replication. I also assume you are aware of the limitations on hardware that come with Standard Edition 1-- I don't recall if you are limited to machines that have a capacity for 2 or 4 CPU's. Also, be aware that Oracle considers multi-core CPU's as multiple CPU's.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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So where can I look into for errors?
Thanks
Markus

You could use dba_snapshot_refresh_times to find last refresh time of your snapshots.
If this is not enough you must write you own procedure that check if master is reacheable or not. And write this info to table. Run this procedure as a job.

2-Way Materialized View Replication

Dear All,
i want to know if it is possible to configure 2-way Replication with Materailized view Replication
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it is working fine
but i want if i update EMP_MV at MV site then the underlying table EMP at master site should also be updated
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Can u please give me the code to resolve conflict issue?
i think i have to execute the code at master site
for now ,i had resolve the issue by
1) Login to Oracle Enterprise Manager with the replication adminstrator user
2) Go to: Distributed->Advanced Replication->Administration
3) On the right there will be a tab called "Errors"
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but now i m getting this in alter.log
Thu Nov 08 06:29:47 2007
Errors in file d:\oracle\admin\testdb\udump\testdb_j000_8420.trc:
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ORA-04052: error occurred when looking up remote object [email protected]
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Oracle Materialized View replication

I am perplexed by the fact that I have a slave sight full of MV's and a refresh group created to refresh with the Master site.
When I refresh, however, the master site updates all of the tables (MV's) except one within my refresh group and all the changes I make on the MV site replicates to the Master site including this ONE MV.
Where the problem lies is that the one MV does not accept any changes from the Master??
Help!!

Hello,
I'm sorry to answer you so late.
I could find an interesting Notes on My Oracle Support which gives a solution to this problem.
Please, have a look on the following Notes:
Complete refresh of a materialized view fails with ORA-02266 [ID 270456.1]In fact, you may have to add another MV to the Refresh Group so as to avoid the Truncate operation during the Refresh.
If possible, you may also try a Fast Refresh (there's no Truncate in this case), but you'll need MV Log.
Hope this help.
Best regards,
Jean-Valentin
Edited by: Lubiez Jean-Valentin on May 19, 2010 11:44 PM

Illegal use of LONG datatype error message when i create materialized view

Hello to all
I want create read only materialized view replication environment two of our tables have LONG datatype when i create materialized view against on them
I recieve this error message
CREATE MATERIALIZED VIEW MDB.TOAD_PLAN_TABLE TABLESPACE aramis REFRESH FORCE WITH ROWID AS SELECT * FROM MDB.TOAD_PLAN_TABLE@arahisto
Error report:
SQL Error: ORA-00997: illegal use of LONG datatype
00997. 00000 - "illegal use of LONG datatype"
Do you know any resort solution for it?
thanks

You can not use longs in materialized views over a database link, you can however take a part of a long over to a materialized view.
I have gotten this to work in the past l had to create a PL/SQL function that you can use to extract the character data from the long column and use that to
as part of the function you will need to pass in the columns of the table that will identify the unique records so you can pick out the long column
example function
-- you will need to make sure this funtion is in the remote location as you can not select longs accross a DB LINK.
CREATE OR REPLACE FUNCTION MDB.TOAD_PLAN_LONG_CONV
(pass in the primary key columns for the table)
RETURN VARCHAR2
IS
v_long VARCHAR2(32767) ;
BEGIN
BEGIN
-- need to select the long column into the PL/SQL variable
SELECT long_column
INTO v_long
FROM MDB.TOAD_PLAN_TABLE
WHERE key_columns = passed columns ;
EXCEPTION
WHEN OTHERS THEN
IF SQLCODE = '-01406' THEN
NULL ;
ELSE
RAISE ;
END IF ;
END ;
RETURN SUBSTR(v_long,1,4000) ;
END ;
Then when you create the materialized view utilize that function on the long column.
create or replace materialized view MDB.TOAD_PLAN_TABLE TABLESPACE aramis REFRESH FORCE WITH ROWID
AS
SELECT column1, .... columnx,
MDB.TOAD_PLAN_LONG_CONV@arahisto (primary key column list) as long_column_name
FROM MDB.TOAD_PLAN_TABLE@arahisto ;
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Mike

SQL command of Materialized View Relication in Oracle XE

Hi, all,
While waiting for the machine to be OK, I decide to post my understand of materialized view replication here and please point me anything incorrect.
I have two machines A and B, I want to make A as a master and B as replica, to replicate table test.
On A:
create materialized view log on test;
On B:
create database link dbl_a
connect to SYSTEM identified by password
using '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = a)(PORT = 1521))
(CONNECT_DATA =
(SID = XE)
create materialized view test_mview as select * from test@dbl_a;
At last, when I want to make a synchronization, I run
On B:
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Any point is appreciated.
Best wishes,
Kemian

You can use DBMS_METADATA :
SCOTT@orcl SQL> create materialized view mv_emp
2 refresh fast on demand with rowid
3* as select empno,ename,job,sal from emp
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Materialized view created.
SCOTT@orcl SQL> set long 100000
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SCOTT@orcl SQL> /
DBMS_METADATA.GET_DDL('MATERIALIZED_VIEW','MV_EMP','SCOTT')
CREATE MATERIALIZED VIEW "SCOTT"."MV_EMP"
ORGANIZATION HEAP PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOG
GING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS"
BUILD IMMEDIATE
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS"
REFRESH FAST ON DEMAND
WITH ROWID USING DEFAULT LOCAL ROLLBACK SEGMENT
DISABLE QUERY REWRITE
AS select empno,ename,job,sal from emp
SCOTT@orcl SQL>

Update sequence wrong in Materialized view when using refresh group

Hi,
I made a trigger (for each row) on a materialized view(replication data from a master table in in a different database), which is refreshed by a refresh group (exec dbms_refresh.refresh('"...). However, the update order/sequence is important and must be handled (by the trigger) in the same order how the updates where done in the master table. Unfortunately the updates in the materialized view are NOT in the same order. The trigger is fired in a wrong order.
I am using database version 10.2.0
Does anybody reconize this problem, Is there a solution for this problem ( with keeping the refresh group mechanisme)?
Thanks
Regards
Jurn

rownum is determined as the row is output, so "order by rownum" does literally nothing.
http://docs.oracle.com/cd/B19306_01/server.102/b14200/pseudocolumns009.htm

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Hi,
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Replication packages are to be used to create replication group are :
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BEGIN
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gname => 'TEST_MV_GRP',
master => 'TEST_DATA_LINK',
propagation_mode => 'ASYNCHRONOUS');
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Shailesh

Yes, I created link between two databases and was able to update tables on 8i from 9i database using that link.
The error I am getting while creating replication group is :
ORA-06550
PLS-00201 : identifier 'SYS.DBMS_REPCAT_UTL2@'TEST_DATA_LINK' must be declared
ORA-06550
PLS-00201 : identifier 'SYS.DBMS_REPCAT_UNTRUSTED@'TEST_DATA_LINK' must be declared
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ORA-06512 : at "SYS.DBMS_REPCAT_SNA", line 64
ORA-06512 : at "SYS.DBMS_REPCAT", line 1262
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Thanks,
Shailesh

Altering a table in a materialized view environment

Hello everybody!.
My question is as simple as this:
When I have a single master - multiple materialized views environment , and I want to alter the master table (usually adding a column) , how do I propagate the change to the materialized view sites ?
In Oracle's documentation manuals it is written the process ONLY for the master sites.If I manually just alter the materialized views to the mat.views sites , the new columns DON'T take data from the master table!
It would be very nice if someone could help me.
Thanks everybody on advance!.
Thanasis Avdis

Hi,
you must dorp and recreate materialized view.

Problem with replication based on materialized view

Problem with replication based on materialized view...
Given:
1. Source: S-1
2. Targets: T-1, T-2
3. DB links: from T-1 to S-1, from T-2 to S-1
Required replicate table TBL on S-1 to T-1, T-2 via db links.
On S-1 was created materialized view log with PK on TBL. On T-1, T-2 were created mat.views as "on prebuilt table refresh fast on demand". In case of get "ORA-12034: materialized view log younger than last refresh" or initial load - perform complete refresh. Initial load on T-1 takes about 1 hour, on T-2 - about 12 hours. Refresh is executed via job with minutely interval. If refresh is running then it is not performed.
Problem: after initial load on T-1 performs fast refresh, but on T-2 raised ORA-12034 and complete performs again.
What's wrong?

34MCA2K2, Google lover?
I confess perhaps I gave a little info.
View log was created before MV.
It was the first initial load.
No refresh failed.
No DDL.
No purge log.
Not warehouse.
There is no such behavior for MVs on another sites.
P.S. I ask help someone who knows what's wrong or who faced with it or can me follow by usefull link.
P.P.S. It's a pity that there is no button "Useless answer"

Data Replication Between Sqlserver and Oracle11g using materialized view.

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is there any way to use Fast refresh in this scenario??
Thanks in advance.
Regards,
Balaram.

Pl do not post duplicates - Data Replication Between Sqlserver and Oracle11g using materialized view.

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Hi all,
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grant_admin_any_schema
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dba_sys_privs

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Hello,
Yesterday I met the same problem and very sad about this, however, my story is much more complicated (I think so).
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Edited by: user9932019 on Sep 4, 2009 2:25 AM

It's not a process that can be explained in a forums posting. You have to understand the steps.
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http://www.orafaq.com/wiki/Scripts#Oracle_Advanced_Replication_Scripts

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TIA
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Hi,
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Regards,
Jonathan Ferreira - Brazil
http://www.ebs11i.com.br

Multiversions in Materialized View Replication Environment

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