When to use a materialized view?
Materialized views are primarily used to increase application performance when it isn’t feasible or desirable to use a standard view with indexes applied to it. Materialized views can be updated on a regular basis either through triggers or by using the ON COMMIT REFRESH option.
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 create Materialized View on a view?
To answer your question: no, you can’t create materialized view logs on a view – only on tables. The requirements for a FAST refreshable materialized view are described in this answer Materialized views aren’t a magic tool to make slow views execute fast. You’ll probably have to examine why the main view is slow.
How to REFRESH MATERIALIZED VIEW in Oracle?
Oracle provides flexible ways to refresh materialized views: you can refresh them full or incremental; you can refresh them on demand or at the commit time in the source table. When the size of the materialized view grows, one needs to explore ways to perform the refresh faster. One of the ways to expedite the refresh is to use parallel execution.
Does MariaDB support materialized views?
MariaDB does not support materialized views natively, but you can easily create them with a tool called Flexviews. It uses MariaDB’s log to incementally refresh the views (tables).
What is materialized view in Oracle?
A materialized view in Oracle is a database object that contains the results of a query . They are local copies of data located remotely, or are used to create summary tables based on aggregations of a table’s data.