Offline Instantiation of a Materialized View Site Using Export/Import

Has anyone had any success performing offline instantiation of a materialized view site using export/import in Oracle9?

This is what I wanted to ask in the forum. I want to use datapump for the initial instantiation because I believe that indexes (the actual indextables, not just the definition) are also replicated using datapump.
So, is it possible to do the instantiation using datapump?

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Updatable materialized view site - replication

Hi all,
I have a shared instance database (with multiple schemas) hosting different applications for different customers. I'm now going to move out one of the application - the materialized view site to another database in new server. (as per request by customer to another data center) by using schema level import/export. The master site will remain untouched.
As i'm rather new in replication, I would like your advise in which data dictionary tables where I can find which are the schemas having the below privileges. As this is a legacy database handed over to us long back, i need to dig out all the info to plan for the migratiion. I need to identify which schema is taking part in the snapshot replication in the mview site as there are 20 over schemas in the database. Can anyone advise me? Kindly provide addtional info if u think it helps.
grant_admin_any_schema
privilege_type => 'proxy_snapadmin'
privilege_type => 'receiver'
privilege_type => 'propagator'
thanks

dba_sys_privs

Are there performancebenefits to reorganizing database-using export/import?

I have a production database using Oracle 9.2.0.5, which has been running for last 3 years since it was upgraded from 8.1.7. At that time we had done full export of 8.1.7 database and then created 9.2. instance and then imported all the application schemas.
Load on our database has been increasing and there are constant pressures from management to improve performance. We have looked at indexes many times, have lots of memory for SGA and have tuned various init.ora parameters. Being a third party packages, we cannot rewrite queries.
Application is a mix of OLTP and reporting, it is definitely more read than write.
Are there any benefits to reorganize database using export/import, i.e., we will do a full export of existing database and then delete all objects from application schemas and do schema imports. We will run the dbms_Stats again to recomputed statistics. Of course, we will test all of that in a test environment before making change sin production.
I have heard different views on reorganization. Some people say it is useless, some people say it can improve performance since data will be placed homely in fewer blocks.
Appreciate your feedback.

Hi,
Oracle gave us reorg utilities (dbms_redefinition) because Oracle does not do real-time reorganization for performamnce reasons.
In some applications, reorgs are critical to high-performance, while in others, it may make no difference.
Remember, a reorg simply puts the indexes and tables into their "optimal" pristine state.
The most striking benefit of table reorgs is when a "sparse" table experiences lots of full scans. After the reorg, response time can be cut in half.
Also, in cases where related rows are queried together, a reorg with row-resequencing (like 10g sorted hash clusters) make a bif difference:
http://www.dba-oracle.com/t_table_row_resequencing.htm
But like I said, it depends on many factors . . .
Hope this helps . . .
Donald K. Burleson
Oracle Press author
Author of "Oracle Tuning: The Definitive Reference"
http://www.rampant-books.com/book_2005_1_awr_proactive_tuning.htm

Using export/import to migrate data from 8i to 9i

We are trying to migrate all data from 8i database to 9i database. We plan to migrate the data using export/import utility so that we can have the current 8i database intact. And also the 8i and 9i database will reside on the same machine. Our 8i database size is around 300GB.
We plan to follow below steps :
Export data from 8i
Install 9i
Create tablespaces
Create schema and tables
create user (user used for exporting data)
Import data in 9i
Please let me know if below par file is correct for the export :
BUFFER=560000
COMPRESS=y
CONSISTENT=y
CONSTRAINTS=y
DIRECT=y
FEEDBACK=1000
FILE=dat1.dmp, dat2.dmp, dat3.dmp (more filenames here)
FILESIZE=2048GB
FULL=y
GRANTS=y
INDEXES=y
LOG=export.log
OBJECT_CONSISTENT=y
PARFILE=exp.par
ROWS=y
STATISTICS=ESTIMATE
TRIGGERS=y
TTS_FULL_CHECK=TRUE
Thanks,
Vinod Bhansali

I recommend you to change some parameters and remove
others:
BUFFER=560000
COMPRESS=y -- This will increase better storage
structure ( It is good )
CONSISTENT=y
CONSTRAINTS=y
DIRECT=n -- if you set that parameter in yes you
can have problems with some objects
FEEDBACK=1000
FILE=dat1.dmp, dat2.dmp, dat3.dmp (more filenames here)
FILESIZE=2048GB
FULL=y
GRANTS=y -- this value is the default ( It is
not necesary )
INDEXES=y
LOG=export.log
OBJECT_CONSISTENT=y -- ( start the database in restrict
mode and do not set this param )
PARFILE=exp.par
ROWS=y
STATISTICS=ESTIMATE -- this value is the default ( It is
not necesary )
TRIGGERS=y -- this value is the default ( It is
not necesary )
TTS_FULL_CHECK=TRUE
you can see what parameters are not needed if you apply
this command:
[oracle@ozawa oracle]$ exp help=y
Export: Release 9.2.0.1.0 - Production on Sun Dec 28 16:37:37 2003
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
You can let Export prompt you for parameters by entering the EXP
command followed by your username/password:
Example: EXP SCOTT/TIGER
Or, you can control how Export runs by entering the EXP command followed
by various arguments. To specify parameters, you use keywords:
Format: EXP KEYWORD=value or KEYWORD=(value1,value2,...,valueN)
Example: EXP SCOTT/TIGER GRANTS=Y TABLES=(EMP,DEPT,MGR)
or TABLES=(T1:P1,T1:P2), if T1 is partitioned table
USERID must be the first parameter on the command line.
Keyword Description (Default) Keyword Description (Default)
USERID username/password FULL export entire file (N)
BUFFER size of data buffer OWNER list of owner usernames
FILE output files (EXPDAT.DMP) TABLES list of table names
COMPRESS import into one extent (Y) RECORDLENGTH length of IO record
GRANTS export grants (Y) INCTYPE incremental export type
INDEXES export indexes (Y) RECORD track incr. export (Y)
DIRECT direct path (N) TRIGGERS export triggers (Y)
LOG log file of screen output STATISTICS analyze objects (ESTIMATE)
ROWS export data rows (Y) PARFILE parameter filename
CONSISTENT cross-table consistency(N) CONSTRAINTS export constraints (Y)
OBJECT_CONSISTENT transaction set to read only during object export (N)
FEEDBACK display progress every x rows (0)
FILESIZE maximum size of each dump file
FLASHBACK_SCN SCN used to set session snapshot back to
FLASHBACK_TIME time used to get the SCN closest to the specified time
QUERY select clause used to export a subset of a table
RESUMABLE suspend when a space related error is encountered(N)
RESUMABLE_NAME text string used to identify resumable statement
RESUMABLE_TIMEOUT wait time for RESUMABLE
TTS_FULL_CHECK perform full or partial dependency check for TTS
VOLSIZE number of bytes to write to each tape volume
TABLESPACES list of tablespaces to export
TRANSPORT_TABLESPACE export transportable tablespace metadata (N)
TEMPLATE template name which invokes iAS mode export
Export terminated successfully without warnings.
[oracle@ozawa oracle]$
Joel P�rez

Note:304522.1 How to Move Queue Tables without using export import

Trying to use the pkg available in Metalink "Note:304522.1 How to Move Queue Tables without using export import"
Using the 10.1.0.x and upwards Package, I'm getting the following error on a single consumer queue table with an xmltype payload:
SQL> exec move_aqt.move('XFORM_TEST_INT','INTERFACE_XML_QUEUE','SMALLBLOCK');
BEGIN move_aqt.move('XFORM_TEST_INT','INTERFACE_XML_QUEUE','SMALLBLOCK'); END;
ERROR at line 1:
ORA-20000: ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SYS.MOVE_AQT", line 652
ORA-06512: at line 1
We've tried in multiple environments, always with the same results.
Trace file shows:
*** 2006-11-08 10:06:47.154
*** SERVICE NAME:(SYS$USERS) 2006-11-08 10:06:47.147
*** SESSION ID:(379.954) 2006-11-08 10:06:47.147
qtable move procedure starting execution at 08-11-2006 10:06:47 for queue table XFORM_TEST_INT.INTERFACE_XML_QUEUE
qtable move procedure experienced an exception at 08-11-2006 10:06:47
qtable move error message ORA-06502: PL/SQL: numeric or value error
qtable move procedure ended execution at 08-11-2006 10:06:47
Can anyone help with this? Has anyone used this before successfully (or not successfully). We urgently need this working today to test moving our queue table into a tablespace with a smaller block size for performance reasons in production.
Thanks for the help!
Tony

Thank you,
Yes we've done that. They've confirmed a problem with the links/scripts on the note. The 10.1 and up version was not really 10.1 and up.
As they would not have a new version available in time for the move we needed to perform, we switched our approach to using dbms_redefinition instead.
Thanks for the reply,
Tony

Homogeneous system copy using export/import on WIn/Ora

Dear experts,
i need to know the homogeneous system copy procedure using export/import method for following scenario as we are in the process of Data center migration of SAP systemsfrom location to another location.
Source system:
ECC6/BI7/APO(ABAP stack)
OS:WIndows 2003
D:B:Oracle 10g
Target System: New hardware installed on Virtual environment(VMware)
No change of SID
ECC6/BI//APO
OS:WINDOWS2008
D:B: Oracle 11g
It would be great if anyone can share the documentu2019s/links (Not SAP homogeneous system copy guide) which you have prepared for the homog. system copy using export/import on Windows/oracle as i have done the system copy using backup/restore for ABAP stack and export/import for Java stack so far.
Therefore i am not sure about this procedure/prerequisites/checklist needs to prepare as i have gone through the SAP guide but it is not step by step document.
Cheers

There are two approacahes for your project
1) First wether to use Oracle11g on target database
2) Continue with Database Oracle 10.2 on traget database
If you want to use Oracle11.2 on your target database you have to search the installers which are supported for 11.2 database. If the installers are available then only you can install your target database using Oracle11.2.Other wise t use Oracle10.2.0.4 is supported on Win2008r2. You can use this version of Oracle database to build ur target database.It works fine . Absolutely no problem.
Later on you can upgrade the Oracle10.2 to 11.2 Onwards.
If installers are avialble you can use Oracle11.2 also. There is absolutely no problem.
As per my knowledge installers are available and supported with Oracle11.2.Also check the PAM before arriving on any deciscion.

Need help with database migration using export/import

Hi,
I am planning to do a database migration from 8.0.6 to 10.2.0.4. I am using export/import. Please answer some of my queries:
1) Do i need to do full export using SYS/SYSTEM user.
exp80 system/manager file=c:full.dmp log=c:\full.txt full=y consistent=y
2) Will there be any data corruption while export.
3) Is export/import the only method of migration/upgradation.
Please help
Thanks.

I'll answer the specifics that I know about your questions, but please look at the post from Srini for additional info:
1) Do i need to do full export using SYS/SYSTEM user.
exp80 system/manager file=c:full.dmp log=c:\full.txt full=y consistent=yA full export will move as much information (metadata/data) as possible. In order to do a full export/import, you need to do this from a
privileged account. A privileged account is one with EXP_FULL_DATABASE for export and IMP_FULL_DATABASE for import.
2) Will there be any data corruption while export.The data in the objects that you are exporting is being read, nothing is written to user data. I'm not sure what this is available in 8.0.6,
but if you need a consistent export, look to see if consistent=y is available in 8.0.6. All this means is that the dump file created will have
consistent data in it.
3) Is export/import the only method of migration/upgradation.If you are changing hardware, the only supported way from 8.0 to 10.2.0.4, that I know of, is using exp/imp.
Hope this helps.
Dean

Error while creating materialized view which using database link

Helo!
I'm getting error "ORA-00942: table or view does not exist" when I want to create materialized view.
Details:
1. On destination database I create a database link:
CREATE DATABASE LINK SDATABASE
CONNECT TO MYUSER
IDENTIFIED BY MYUSERPASS
USING 'ORCL';
=> Command "SELECT * FROM TABLE1@SDATABASE" returns data normally!
2. On source database I create MATERIALIZED VIEW LOG:
CREATE MATERIALIZED VIEW LOG
ON TABLE1
WITH PRIMARY KEY
INCLUDING NEW VALUES;
3. Now, when I want to create MATERIALIZED VIEW on destination database:
CREATE MATERIALIZED VIEW TABLE1
REFRESH FAST
START WITH SYSDATE
NEXT SYSDATE + 1/1440
WITH PRIMARY KEY
AS SELECT * FROM TABLE1@SDATABASE;
...I get error "ORA-00942: table or view does not exist"!
How is that possible if command "SELECT * FROM TABLE1@SDATABASE" returns data normally?
Thanks,
Voranc

And, I'm using Oracle 10g.
Voranc

Issue with complete refresh on materialized view when using rownum

Hi all,
I had an issue with rownum when using complete refresh
I am using rownum when creating materialized view and it is generation correctly.But the issue was when i am refreshing the same ,rownum was not getting sorted in ascending order.
anyone had come across this scenario

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

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

Materialized Views created using ROLLUP

Not sure if this one is best posted to a general Oracle forum, or even to the Discoverer Forum, but it's more to do with Data Warehousing so here goes...
1. If I create a materialized view, either with or without OWB, do I also need to separately create indexes on the materialized view?
2. If I create them using GROUP BY and ROLLUP (to create summaries that calculate all the subtotals along all hierarchies and dimensions), would any subsequent query have to use GROUP BY and ROLLUP to qualify for query rewrite?
3. If I create them using GROUP BY and ROLLUP, would the queries generated by Discoverer ever get rewritten, as I assume they would not use GROUP BY and ROLLUP as these were not features found in earlier versions of Oracle?
Any advice gratefully received.
Mark

Thanks for replying, Igor.
Just to clarify:
1. Do MV's created without fash refresh capabilities still get indexes created automatically? If not, should you manually create them in this instance?
2. Can you confirm that, if a MV gets created using GROUP BY and ROLLUP (to potentially calculate all dimension intersections in one go), users queries to the base fact table do not have to use ROLLUP in their GROUP BY clause - they will still get rewritten ok?
3. You mentioned that Discoverer generates queries using GROUP BY - does it ever use GROUP BY ROLLUP if it knows it's working on an Oracle 9i platform?
I guess where i'm coming from, is that we're considering using the OLAP Summary Manager within OEM to create materialized views, rather than the normal summary adviser, as this creates MV's designed to hold (R)OLAP cubes (as detailed at http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96520/mv.htm#574241). I wouldn't however want to use these if user's queries had to specify ROLLUP in their GROUP by clause to qualify for query rewrite.
Getting back to OWB, are there any plans to improve the support for importing, designing and refreshing materialized views in the Paris release of OWB? Summary management is perhaps a bit of a weak spot in OWB, and it'd be good if Hierarchical Cube Materialized Views - which are an excellent new feature in 9i - were supported in future releases.
best regards
Mark Rittman

Materialized view refresh using connected user db links

I have a general question. I have a materialized view that more or less joins tables from 2 databases.
For example I have a table X in database A, and a table Y in database B. I create the materialized view in the schema owning table X in database A. Tables A & B from both database are in the same schema with a synchronized password. My materialized view is created to join tables A & B using connected user DB links, and everything works when I create the view, however, it appears that the refresh is failing. I suspect this is because of the connected user link and there is no "logged" in user when the refresh occurs.
Does anyone know if it is possible to create a materialized view between 2 tables in different databases to refresh using a connected user DB link?
Thanks.

sybrandb
Why does it not make sense to have materialized views accross databases?
If a materialized view is essentially a remote copy, then wouldn't that imply accross databases? The only thing I did was to take it a step further and join it with a local table in the owning database.
About not being right about not having a connected user., that may be right, but I have a thought/question..... I equated this as using connected user links in jobs scheduled via dbms_job or dbms_scheduler, as when this runs there is no user connected to the database to provide remote credentials for the link... Essentially this seems to be like a cron job that fires on some schedule (whether a user is connected or not), it would seem to me that it might need to have credentials defined in order to be able to connect to the remote database.
Thanks

Materialized View cannot use filter columns ORA-12033

Hello Forum members,
I am creating the following MV with Can you please advise me??
Thanks
SQL> create materialized view log on his_swi with rowid including new values;
Materialized view log created.
SQL>
SQL> CREATE MATERIALIZED VIEW His_Swi_mv
2 refresh fast with rowid
3 AS
4 select quarter,sum(sw_po),sum(sw_po_fre),
5 sum(sw_por_sta+sw_porunt_swi+sw_por_hb+sw_po_free) as proj from
6 history_switch group by quarter;
his_swi group by quarter
ERROR at line 6:
ORA-12033: cannot use filter columns from materialized view log on
"EM"."HIS_SWI"

Hello Forum members,
Please ignore the above post.
got solution from : http://www.jusungyang.com/DWfolder/MaterializedViews/MVlogFilterColumns.txt
Thanks

Can Oracle materialized view be used as crystal report datasource

Hi,
Can we use materialized view created in Orace 10g database as the data source of crystal reports.
I'm using Crystal reports Server 2008 V1 version. I'm unable to find the materialized view under my data connection. I can see only tables, static views and stored procedures.
Is there a way by which I can run my reports against a materialized view created in Oracle.
Thanks
Thomas EL

Hi Thomas,
Rather than doing all of this work around to access multiple databases/servers why not create a stored procedure to do all of this for you? Search the notes area for samples on how/what CR requires to use a SP in Oracle.
Advantages is this is done all server side and CR simply waits for the data to be returned. Even if you are using a BVM or connecting directly to the SP, both cases are server side. Database servers are much more efficient and optimized to run queries and filtering data. CR has to do the filtering on it's second pass and that causes performance delays.
Thank you
Don

Error creating materialized view log using DBlink

Hi guys,
I have 2 databases in diferent machines . (machine A and B)
Machine A is my production database and I have a database link in machine B accessing Machine A
CREATE MATERIALIZED VIEW vm_test
BUILD IMMEDIATE
REFRESH FAST ON commit as
select * from test@A
-- no problem in this first operation the materialized view was created sucessfully
Now I need to create the LOG
SQL> CREATE MATERIALIZED VIEW LOG ON test
2 PCTFREE 5
3 TABLESPACE prodemge_2006
4 STORAGE (INITIAL 10K NEXT 10K);
CREATE MATERIALIZED VIEW LOG ON test
ERROR at line 1:
ORA-02050: transaction 5.21.8771 rolled back, some remote DBs may be in-doubt
ORA-02068: following severe error from A
ORA-03113: end-of-file on communication channel
What could be causing this error ?
Thank you,
Felipe

ORA-02050 transaction string rolled back, some remote DBs may be in-doubt
Cause: Network or remote failure during a two-phase commit.
Action: Notify operations; remote databases will automatically re-sync when the failure is repaired.
ORA-02068 following severe error from stringstring
Cause: A severe error (disconnect, fatal Oracle error) was received from the indicated database link. See following error text.
Action: Contact the remote system administrator.
M.S.Taj

Offline Instantiation of a Materialized View Site Using Export/Import

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