Oracle 8i Materialized view

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• Eclipse 3.4 with Oracle Plugin - materialized view problem

  Hello
  
  I installed the Plugin for Oracle and wanted to use the functionality of the DDL generate to generate a SQL Script of a MatView. When I click on "Generate the DDL" in the floating menu, nothing happens. When I want to see the columns of a MatView (I try to open it with the sign +) has an error message:
  
  'The charging base provider' has encountered a problem.
  
  An internal error occurred during: "The charging base provider."
  
  All other objects are working correctly.
  
  Is this a bug? Everyone saw such a mistake?
  
  THX,
  his
  
  PS. I also tried the Ecplipse Version you can download from Oracle with the integrated plugin, the same error.

  Yes, it's a bug. We are now working on the fix. The next version of EPCO will be released later in September. Stay tuned.

  Shenxue

• Oracle Warehouse builder or materialized views

  I have a requirement as follows:
  
  Requirement:
  We must create a Reporting DB to be used for information and a transactional database will be in separate host. Fundamentally, he need to extract data from a set of transactional DB tables and move to the Reporting DB schema at adequate intervals.
  
  We may have to get a different column data in different tables and store it in a single table / several reports DB tables.
  
  
  Can someone whether to go with Oracle Warehouse builder or the materialized views for this offer please?
  Or use OWB to create and maintain the MVs.
  
  Also please me a link point to what features are available with OWB
  
  Our Oracle is installed in Solaris 10 and one who is perfect either generator warehouse Oracle or materialized views
  
  Thank you
  APPU
  
  Published by: user12094414 on October 25, 2009 21:52
  
  Published by: user12094414 on October 25, 2009 22:17

  user12094414 wrote:
  Can someone whether to go with Oracle Warehouse builder or the materialized views for this offer please?
  Or use OWB to create and maintain the MVs.

  The two are not exclusive. OWB is a tool for designing the data movement and implement updates to the warehouse.

  MVs are a tool integrated into the database in support of materialization of the current request to speed up some types of applications related to data that is availoable, perhaps after transport OWB.

  >

  Also please me a link point to what features are available with OWB

  Normal (to allow the future of mutual aid) access is

  http://OTN.Oracle.com
  -> Products (perma menu on the left): database (link)
  -> Warehouseing Bi & data (link in the middle section)
  -> Related products (product menu on the right): Warehouse Builder
  where you can get a Viewlet, whitepapers, docs, demos, tutorials, etc.

  Direct access to the page above is http://www.oracle.com/technology/products/warehouse/index.html

• Oracle materialized view more Gateway

  Dear Sir.
  
  We have microsoft sql server, oracle gateway (11G) and database server (10.2.0.5)
  
  We already have the complete installation, and it works.
  
  We create a materialized view in the oracle server to read data from sql server, but the updating of the MV can't wait time
  We are planing to create the view materialized in the oracle gateway server.
  
  My question is:
  
  What is the best solution to create the MV in the oracle gateway server?
  I mean I can't download MV only one instance of oracle database.
  
  Thanks in advance.

  Just to clarify: there is normally no need to install a database on the gateway server. You can create the mview directly in your 10.2.0.5 database.
  If you really want to have another data base which contains the mview then install in the box of gateway to the Oracle database using the version standard edition. There is no need to activate Enterprise Manager or other stuff.
  About the size of the memory, it really depends on the amount of data you have to shoot through the gateway and to select by using the synonym. Therefore, there is no generic answer on sizing.

• Are materialized views in Oracle OLAP licenses. ?

  Hi all
  We use the EE Oracle 10 g 2. We try to find the list of products of Oracle 10gEE. License part materialized views in Oracle OLAP or that come with the Standard edition.
  
  Thank you

  Commerce 10.2 has a table of availability of the editing features (a SE, SE, EE) which establishes good enough differences:
  http://download.Oracle.com/docs/CD/B19306_01/license.102/b14199/editions.htm#BABJICBB

  However I don't see, documentation, its use of MV (license) is clearly defined. Basically, it seems it depends of the use of MVs.

  See, for example, Data Warehouse (syntheses) and integration - based replication. Sometimes, the documentation uses the phrase "materialized views to...» ». SQL aggregation / analytical seems to be a missing piece as well (in the current doc sets).
  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14200/statements_6002.htm
  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14223/basicmv.htm#i1006193
  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14226/repmview.htm

  The new 11g Cube materialized views feature is of course an OLAP option.

  And, as usual, you can find in the documentation, forums etc is almost irrelevant when it comes to licensing issues. You should see your specific contract. Talk to your sales person.

  "License issues really, really, really should be addressed to your representative commercial Oracle." Nothing we say here links to Oracle. We don't know other agreements, your organization may have with Oracle. ... explaining that "a guy on the internet with a card to play said logo is OK," probably won't do more good. »
  (borrowed from Oracle licenses VMware + Quadcore

  Published by: orafad on January 27, 2011 20:39

• Materialized views Oracle | Reporting

  I have a requirement as follows:
  
  Requirement:
  We must create a Reporting DB to be used for information and a transactional database will be in separate host. Fundamentally, he need to extract data from a set of transactional DB tables and move to the Reporting DB schema at adequate intervals.
  
  
  We may have to get a different column data in different tables and store it in a single table / several reports DB tables.
  
  
  Solution (Please confirm):
  
  I intend to use Oracle materialized views in the same host as transactional DB to next part of requirment
  
  "We may have to get a different column data in different tables and store it in a single table / several reports DB tables.
  
  and then use Oracle streams to move at regular intervals of DB reports.
  
  Is this feasible?
  Or please suggest a solution.
  
  Thank you
  APPU

  We must create a Reporting DB to be used for information and a transactional database will be in separate host. Fundamentally, he need to extract data from a set of transactional DB tables and move to the Reporting DB schema at adequate intervals.

  Depending on how small and simple is your database, you can create materialized views on the Reporting DB to point to DB Transactionla through the database link.

  I intend to use Oracle materialized views in the same host as transactional DB to next part of requirment

  If are simple MVs, then let them cool off quickly. If too complex, all jobs to refresh at specific intervals.

  "We may have to get a different column data in different tables and store it in a single table / several reports DB tables.

  You will be several tables in DB report in the form of the Metrialised views

  and then use Oracle streams to move at regular intervals of DB reports.

  This combination is not necessary. You're talking about two different things at the same time.

• Materialized Oracle view | Deleting records, Oracle materialized view

  One question reg Materialized views.
  
  If as part of the interview of the Source database, we remove some (older) recordings, the materialized view will also be updated with the deletion?
  
  I believe that the answer is Yes. In this case make sure that deletion is not the case?
  
  Is there anyway that we'll stop MView update to delete records that is inserted once even if we remove the same records in the source DB?

  This is a common scenario, especially with materialized views that summarizes the detail data where you want to keep the summary but not the detail, and it is discussed in the documentation.

  The technique is to make the MV refresh on request, delete the data in the detail tables and the CONSIDER_FRESH procedure to prevent the changes propagating to the MV. You will probably find it in the docs by searching on DBMS_MView.Consider_Fresh. There are a few caveats to note, in my opinion.

• ORA-12028: type of materialized view is not supported by the main site

  Hi guys!

  We face a problem these days about the materialized view.

  We have upgraded database version 9.2.0.7 directly to 10.2.0.5 (RHEL4 x 86) on the same host. Database uses the driver dg4odbc to connect with remote SQL Server 2012 through data binding called MIKSERI. Our developer team would like to have replicated SQL server table data side Oracle using the materialized view.

  They created Materialized view, but it is not at all to refresh the data. I tried to study a little bit, and whenever I try to change the view anyway I hit error:

  ORA-12028: view type is not supported by the master site materialized @ 'MIKSERI '.

  ORA-06512: at line 22

  I looked at the solutions proposed and discovered that it is maybe the compatible database parameter, so I changed from previous 9.2.0.0.0 to 10.2.0.1.0 but still no luck. Just to emphasize this database is of course different clone of production to a different database, with db name retained and other parameters, but on another host computer and listening port. I even try to change global name, but still no luck.

  Main problem is that refresh the work does not at all. To be more precise, we have created MV on the side of the Oracle and FULL Refresh should be done every 3 minutes. MV uses HS db link to the sql server database. During the creation of MV, we can see currently given to sql server, but the problem is that we cannot do MV to refresh every 3 minutes. When I try to change MV and put the refresh interval I get above error.

  Any kind of help would be greatly appreciated,

  Thank you

  I found the reason why my MV update jobs failed, job_queue_processes parameter was equal to 0. I change this setting and now works fine.

  Thank you for your time!

• Materialized views Refresh method and refresh option

  Hi Experts,

  According to the docs, If the MV contains the following, MV is considered complex. I wonder is there any view data dictionary that indicates the type of MV? Because is very easy to the candidate a complex type mv. Because many queries contains the properties below.

  http://docs.Oracle.com/CD/B28359_01/server.111/b28326/repmview.htm#i52501

  http://docs.Oracle.com/CD/B28359_01/server.111/b28313/basicmv.htm

  Specifically, a materialized view is considered complex if the materialized view definition query contains:

  • A CONNECT BY clause
  • An INTERSECT , MINUS , or UNION ALL operation
  • he DISTINCT or UNIQUE keyword
  • In some cases, an aggregate function, although it is possible to have an aggregation function in the query definition and always have a simple materialized view
  • In some cases, joins other than those in a subquery, although it is possible to have joins in the definition to interrogate and still have a simple materialized view
  • In some cases, a UNION operation

  
  

  After that I kept going to read that I learned that when a VM is created, the refresh mode is specified according to the type of the MV. That means, using ON-DEMAND refresh mode is widespread. The documentation mentions that there isa also refresh option. My question is, is it possible to specify

  ON REQUEST and FAST together?

  Also, what are the differences between FULL and FAST. Ends truncate the table and fill it up again?

  ON COMMIT

  Refresh product automatically when a transaction which changed one of the paintings of the materialized view's retail is committed. This can be specified as the materialized view is quickly updatable (in other words, not complex). The ON COMMIT privilege is required to use this mode.

  ON DEMAND

  Refresh occurs when a user manually executes one of the procedures available refresh contained in the DBMS_MVIEW package ( REFRESH , REFRESH_ALL_MVIEWS , REFRESH_DEPENDENT ).

  COMPLETE	Refreshes and recalculating the materialized view query definition.
  FAST	Applies incremental changes to refresh the materialized view using the information recorded in the papers of the materialized view, or an SQL * Loader direct-path access or a partition maintenance operation.

  FORCE

  Applies FAST update if possible; otherwise, it applies COMPLETE Refresh.

  NEVER

  Indicates that the materialized view will not be updated with updating mechanisms.

  Select * from version of v$.

  Oracle Database 11 g Release 11.2.0.4.0 - 64 bit Production

  Thank you

  Çaglar wrote:

  ...

  Also, what are the differences between FULL and FAST. Ends truncate the table and fill it up again?

  ...

  Thank you

  I just want to answer the truncated question. Seems that nobody covered that yet.

  Answer: It depends.

  If you do a full refresh, then the default is to use ATOMIC_REFRESH = TRUE.

  This means that the update is done via an insert, delete , and ... Select.

  You can change it to ATOMIC_REFRESH = FALSE (parameter dbms_mview.refresh).

  This means that is a TRUNCATE and insert a ... Select with APPEND peak (path direct insert).

  Refresh if Atomic = FALSE is considerably faster than the default. Also way less Archives of newspapers are written.

  The downside is however that, during the update the MV is empty, is no longer an atomar operation!

  See also Oracle documentation: http://docs.oracle.com/cd/B28359_01/appdev.111/b28419/d_mview.htm#i997194

• What is materialized views named?

  Hi there;

  When I read the documentation below, I met a sentence.

  http://docs.Oracle.com/database/121/DWHSG/basicmv.htm#i1007299

  Materialized views with subqueries or views named in the DE clause can be fast refreshed as points of view can be completely merged.

  What is the point of view named? Thanks in advance.

  Hello

  Named views are normal views created by running ' create view abc as select... from...» ».

  Kind regards

  Bashar

• What is a materialized view?

  If I read oradocs on flashback instructions table and it mentions

  When you delete a table, all the newspapers view materialized, defined on the table are also deleted, but are not placed in the Recycle Bin. Therefore, the materialized view logs cannot be flashed back as well as the table

  (http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9012.htm#SQLRF01802)

  
  

  then I went to oradocs for the view materialized and read the first half logs.

  http://docs.Oracle.com/CD/B19306_01/server.102/b14200/statements_6003.htm

  Now, I know what makes a materialzed view log.

  is a materialized view as a point of view however... ?

  No, it isn't.

  A materialized view is basically a query with its 'materialized' or stored in a table results. A MV can be used by Oracle in a manner transparent re - write a query to be faster.

• Problem with a complete refresh materialized view when using rownum

  Hi all

  I had a problem with rownum when complete using Refresh

  I use rownum when you create the materialized view, and this is the generation properly. But the question was when I even refreshing, rownum was not get sorted in ascending order.

  anyone encountered this scenario

  rownum is determined as the line came out, also "order by rownum" does absolutely nothing.

  http://docs.Oracle.com/CD/B19306_01/server.102/b14200/pseudocolumns009.htm

• Materialized view automatically refresh? If the updating of the means how?

  Materialized view refresh automatically? If the updating of the means how?

  It is expected is not to ask questions of the basic documentation.

  Refresh Options

  When you define a materialized view, you can specify three update options: how to refresh, what kind of update and can trust constraints be used. If not specified, default values are considered as ON DEMAND , FORCE , and ENFORCED forced respectively.

  The two execution modes are ON COMMIT and ON DEMAND . According to the materialized view, you create, some options may be unavailable. Update modes are described in table 8-4 .

  Table 8-4 Modes of discount

  Refresh the Mode	Description
  ON COMMIT	Refresh product automatically when a transaction which changed one of the paintings of the materialized view's retail is committed. This can be specified as the materialized view is quickly updatable (in other words, no complex). The ON COMMIT privilege is required to use this mode.
  ON DEMAND	Refresh occurs when a user manually executes one of the procedures available refresh contained in the DBMS_MVIEW package ( REFRESH , REFRESH_ALL_MVIEWS , REFRESH_DEPENDENT ).

  http://docs.Oracle.com/CD/B28359_01/server.111/b28313/basicmv.htm#i1006193

• What is the desertion of orderly materialized view with MLOG$.

  I have 11.2.4.0 Oracle enterprise edition.

  I want to remove completely the MATERIALIZED view and MATERIALIZED view logs.

  
  

  I need to do this on a production of databases.

  
  

  It's the right order?

  Thank you.

  You can drop the materialized view log first, then the materialized views.

  Because when you drop a materialized view log is therefore more available to fast refresh, however, it is available to rewrite, so drop materialized view log first, then materialized views. Additional information provided below may help Doc Oracle.

  If you delete a simple materialized view that is the least recently refreshed materialized view of a main table, then the database automatically purges the materialized master table see only connect the required lines to refresh the materialized view has fallen.

  If you delete a materialized view that was created on a predefined table, then the database removes the materialized view, and table preconstruitse returns to his identity in a table.

  When you delete a master table, the database does not automatically drop the materialized views based on the table. However, the database returns an error when it tries to refresh materialized view based on a main table that has been abandoned.

  If you delete a materialized view, then all the compiled queries that have been rewritten to use the materialized view will be invalidated and recompiled automatically. If the materialized view was preconstruitse on a table, then the table is not deleted, but it can no longer be maintained by the materialized view refresh mechanism.

• change the source tables in the materialized view

  If I change the name of the source table in a materialized view, I have to delete and recreate the MV? For example, My MV uses a table from a DBlink. Instead I want to physically copy the table in the schema, and then create the MV using the local table, then change MV to use the remote table and I expect to start refreshing the MV for incremental data. Can I do it?

  No, you can't.  Oracle has no way of knowing that the modified table (name) is identical to the original table.

  Hemant K Collette