How do I stop a materialized view from refreshing?

If you really want to permanently disable refresh, even manually, so you’re left with the current contents and they can not be updated from the view query, you can drop the materialized view but keep the backing table: drop materialized view view_name preserve table; This is obviously more radical.

How can materialized view refresh automatically in Oracle?

Set the initialization parameters and bounce the database. Create the materialized view table. Here, we specify that the materialized view will be refreshed every two hours with the refresh fast option. Instead of using DBMS_MVIEW, you can automatically refresh the MVIEW (Snapshot) using Oracle DBMS_JOB Management.

What is fast refresh materialized view in Oracle?

A fast refresh requires having a materialized view log on the source tables that keeps track of all changes since the last refresh, so any new refresh only has changed (updated, new, deleted) data applied to the MV. A complete refresh does what it says: it completely refreshes all data in the MV.

Why are materialized views bad?

The bad news is that you will pay X each time your query is run. Because queries against tables and views do not reference previous results, they are forced to completely recalculate their results each time.

Why do we use materialized view in Oracle?

Materialized View Concepts Oracle uses materialized views (also known as snapshots in prior releases) to replicate data to non-master sites in a replication environment and to cache expensive queries in a data warehouse environment.

Is materialized view refreshed automatically?

A materialized view can be refreshed automatically using the ON COMMIT method. Therefore, whenever a transaction commits which has updated the tables on which a materialized view is defined, those changes are automatically reflected in the materialized view.

Can I rename a materialized view?

Such materialized views can be queried but can’t be refreshed. In this case, you must drop and recreate the materialized view. In general, you can’t alter a materialized view’s definition (its SQL statement). You can’t rename a materialized view.

What is Oracle material view?

A materialized view in Oracle is a database object that contains the results of a query. It stores data physically and get updated periodically.