How do I grant a materialized view privilege?
The privileges required to create a materialized view should be granted directly rather than through a role. To create a materialized view in your own schema: You must have been granted the CREATE MATERIALIZED VIEW system privilege and either the CREATE TABLE or CREATE ANY TABLE system privilege.
Do materialized views need to be refreshed?
Unlike indexes, materialized views are not automatically updated with every data change. They must explicitly be refreshed, either on every commit, on a periodically time schedule or – typically in data warehouses – at the end of an ETL job.
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.
Can we update a materialized view in Oracle?
If the materialized view fails to revalidate, it cannot be refreshed or used for query rewrite. This clause lets you manage the staleness state of a materialized view after changes have been made to its master tables.
How do I fix insufficient privileges in SQL?
ORA-01031: insufficient privileges Solution: Go to Your System User. then Write This Code: SQL> grant dba to UserName; //Put This username which user show this error message. Grant succeeded.
Can we perform DML on materialized view?
A materialized view can be either read-only, updatable, or writeable. Users cannot perform data manipulation language (DML) statements on read-only materialized views, but they can perform DML on updatable and writeable materialized views.
What is grant any privilege in Oracle?
A user can grant any object privilege on any schema object he or she owns to any other user or role. A user with the GRANT ANY OBJECT PRIVILEGE can grant or revoke any specified object privilege to another user with or without the GRANT OPTION of the GRANT statement.
Why is the materialized view not fast refreshable?
The materialized view is not fast refreshable because DML has occurred to a table on which PCT fast refresh is not possible. To avoid this occurring, Oracle recommends performing a fast refresh immediately after any partition maintenance operation on detail tables for which partition tracking fast refresh is available.
What if the refresh method is not specified in the view?
If the refresh method is not specified, the default refresh method as specified in the materialized view definition is used. An alternative to specifying the materialized views to refresh is to use the procedure DBMS_MVIEW.REFRESH_ALL_MVIEWS.
How do I refresh a materialized view on commit?
About ON COMMIT Refresh for Materialized Views. 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.
When does a complete refresh of a view occur?
A complete refresh occurs when the materialized view is initially created when it is defined as BUILD IMMEDIATE, unless the materialized view references a prebuilt table or is defined as BUILD DEFERRED. Users can perform a complete refresh at any time after the materialized view is created.