How do I create a materialized view log in a table?

How do I create a materialized view log in a table?

CREATE MATERIALIZED VIEW LOG ON tableName [WITH [PRIMARY KEY][,ROWID]|[ROWID][,PRIMARY KEY] [(columnName[,…])]] List of columns for which changes will be recorded in the log. Use the WITH clause to indicate the keys and columns for which changes will be recorded in the materialized view log.

How do I view materialized view logs?

Use [dba_|all_|user_]mview_logs . dba_mview_logs will show all the materialized view logs in the database but not everyone will have access to the dba_ views. You probably need create any dictionary . all_mview_logs will show you all the materialized view logs that you have access to.

Why do we need materialized view log?

This process is called fast refresh and improves performance in the source database. A materialized view log can capture the primary keys, row IDs, or object identifiers of rows that have been updated in the master table.

Can we create materialized view on view in Oracle?

When you create a materialized view, Oracle Database creates one internal table and at least one index, and may create one view, all in the schema of the materialized view. Oracle Database uses these objects to maintain the materialized view data. You must have the privileges necessary to create these objects.

Where are Oracle materialized views stored?

Unlike an ordinary view, which does not take up any storage space or contain any data, a materialized view contains the rows resulting from a query against one or more base tables or views. A materialized view can be stored in the same database as its base tables or in a different database.

Where are materialized views stored in Oracle?

Where does materialized view log table stored?

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.

How do I create a materialized view?

Use the CREATE MATERIALIZED VIEW statement to create a materialized view. A materialized view is a database object that contains the results of a query. The FROM clause of the query can name tables, views, and other materialized views.

Can we create materialized view log on a view?

Use the CREATE MATERIALIZED VIEW LOG statement to create a materialized view log, which is a table associated with the master table of a materialized view. Note: The keyword SNAPSHOT is supported in place of MATERIALIZED VIEW for backward compatibility.

How do I grant a materialized view privilege?

To create a materialized view in another user’s schema:

1. You must have the CREATE ANY MATERIALIZED VIEW system privilege.
2. The owner of the materialized view must have the CREATE TABLE system privilege.