A materialized view, or snapshot as they were previously known, is a table segment whose contents are periodically refreshed based on a query, either against a local or remote table. ALTER the existing dependencies to instead refer to the new view (refreshing the data if needed beforehand) Drop the original materialized view and indices which should now not have any dependants; ALTER THE materialized view and indices to drop the suffix to restore the original names; eg. Creates a materialized view (also called a snapshot), which is the result of a query run against one or more tables or views. To update the data in the materialized view, you can use the ALTER MATERIALIZED VIEW My_Indexed_View REBUILD; See also. Description. ALTER MATERIALIZED VIEW [schema. This restriction doesn't apply to INSERTs. This example disables a materialized view and puts it in suspended mode. Remarks. For information on how to query materialized views, see Querying a materialized view. ALTER permission on the table or view is required. the role that has the OWNERSHIP privilege on the materialized view) also owns the target schema. By default, no. ALTER MATERIALIZED VIEW My_Indexed_View DISABLE; This example resumes materialized view by rebuilding it. If you omit both the START WITH and NEXT values, or if you omit the alter_mv_refresh entirely, then Oracle Database does not automatically refresh the materialized view. ]materialized_view_name REBUILD; db_name.materialized_view_name The database name followed by the name of the materialized view in dot notation. Materialized Views in Oracle. Hive performs view maintenance incrementally if possible, refreshing the view to reflect any data inserted into ACID tables. A materialized view created with the automatic refresh can not be alter to stop refreshing. Materialized views are a really useful performance feature, allowing you to pre-calcuate joins and aggregations, which can make applications and reports feel more responsive. Using materialized views against remote tables is … A materialized view in Azure data warehouse is similar to an indexed view … The result set eventually becomes stale when data is inserted, updated, and deleted in the base tables. A materialized view is a table segment or database object that contains the results of a query. ]materialized_view_name [Physical_Attributes_Clause] [STORAGE Storage_Clause] [REFRESH [FAST | COMPLETE | FORCE] [START WITH date] [NEXTREF date]Changes the storage or automatic refresh characteristics of a materialized view … The data in the materialized view remains unchanged, even when applications make changes to the data in the underlying tables. ALTER MATERIALIZED VIEW [db_name. For information on how to create materialized views, see CREATE MATERIALIZED VIEW. In order to disable that you must break the dbms_job that was created in order to refresh the view. The materialized view will be disabled when an UPDATE or DELETE occurs in the referenced base tables. Moving a materialized view to a managed access schema (using the ALTER MATERIALIZED VIEW … RENAME TO syntax) is prohibited unless the materialized view owner (i.e. The complication comes from the lag between the last refresh of the materialized view and subsequent DML changes to the base tables. You can issue SELECT statements to query a materialized view. Performance tuning with Materialized View When you create a materialized view, its contents reflect the state of the underlying database table or tables at that time. 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