Oracle create materialized view log

Can we use create or replace materialized view? How can I rename a materialized view? Can I rename a materialized view? Why do we use materialized view in Oracle?

A materialized view log is located in the master database in the same schema as the master table.

A master table can have only one materialized view log defined on it. You cannot create a materialized view log for a table in the schema of the user SYS. Oracle Database creates the materialized view the schema of its master table.

Because the materialized view conforms to the conditions for fast refresh, the database will perform a fast refresh. A special SEQUENCE column can be include in the materialized view log to help Oracle apply updates to materialized view logs in the correct order when a mix of Data Manipulation (DML) commands, e. Specify the schema containing the materialized view log and its master table. CREATE MATERIALIZED VIEW MV_Test NOLOGGING CACHE BUILD IMMEDIATE REFRESH FAST ON COMMIT AS SELECT V.

ROWID as V _ROWI P. PROJECTID Another key aspect to note is that your materialized view logs must be created as with rowid. Get a list of materialized view log. Create new materialized view without the. This wind-forward is based on changes computed using materialized view logs, similar to a conventional fast refresh,.

To fast refresh a materialized join view , you must create a materialized view log for each of the tables referenced by the materialized views. I want to know how will i Grant SELECT PRIV on Materialized View Log so that FAST refresh happens. Both databases are Oracle 10g R2. The owner of the materialized view must have the CREATE TABLE system privilege.

The problem is that the moment the materialized view is created the mv log on the old table is purged. You probably need create any dictionary. In Oracle , if you specify REFRESH FAST for a single-table aggregate Oracle materialized view , you must have created a materialized view log for the underlying table, or the refresh command will fail. The MVL are tables situated on the source schema which keep the latest changes. When the MV is refreshed these logs are applied on the target MV.

This of it this way: suppose you later create another materialized view on the same table that uses other columns. When creating an Oracle materialized view , you have the option of specifying whether the refresh occurs manually (ON DEMAND) or automatically (ON COMMIT, DBMS_JOB).

Now we can create a materialized view. Now lets commit our changes. Please Note: hence those columns must appear in our materialized view log a) Hence, for fast refreshable aggregate Materialized View we definitely need the column list which contains all columns getting aggregated.

Lets query the materialized view. Connect as that same MV_USER. To fix your broken jobs, connect as the MV_USER (owner of the MV).

Materialized views are created using a create materialized view statement, which is similar to a create table statement.