The views using materialized for data warehousing and reporting

Hello

I would better understand the materialized views in Oracle in particular the use of the option: REFRESH QUICKLY ON COMMIT. The oracle database, we care is a PLM application and any of the tables to apply using the primary key constraints. Instead, the application uses a separate schema to store the key values for each object/save in the database. I would use Materialized View to the creation of a data warehouse smart to transfer only the lines that have updated since the last refresh of the warehouse. My understanding of the materialized views you can't define a until and unless you have a primary key constraint. It's fine and understandable.

Can we have an oracle separate sid something like WSHD - data warehouse and using the database between the main site links - site WSHD always transfer lines that have changed since the last refresh with REFRESH QUICKLY ON COMMIT option? (Note: this is taking into account the fact that a database primary key constraints defined on the paintings of masters.)

I guess you have to install MV NEWSPAPER tables on the main table and then create a materialized using option QUICKLY ON COMMIT REFRESH view?

Am I wrong?

Will there be another option for the transfer of the lines of main tables in the data warehouse in Oracle?

Thank you very much.

See you soon.
Rohan

Published by: José on 10/01/2009 00:21

1. you can't define a materialized as ON COMMIT REFRESH in a separate database view. It must be in the database even if it's to refresh commit it.
See http://hemantoracledba.blogspot.com/2008/06/mvs-with-refresh-on-commit-cannot-be.html

2. you don't have to have a primary key to set a MV. You can set a MV WITH ROWID (except if you re-create the source table, you need to do a refresh of the MV because ROWID changes).
See http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_6002.htm#i2063793

Hemant K Collette

Tags: Database

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