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So I decided to drop MV and I just realized that something else is also wrong because after 5 minutes, drop statement failed and even my session has lost. Syntax DROP MATERIALIZED VIEW [ IF EXISTS] [ owner. I tracked the drop comment and I saw that Oracle was trying to delete some tables: sys.mvref$_stmt_stats sys.mvref$_change_stats sys.mvref$_stats sys.mvref$_run_stats Specify NEVER REFRESH to prevent the materialized view from being refreshed with any Oracle refresh mechanism or packaged procedure. view. tablename [ Physical_Attributes_Clause] [TABLESPACE tablespace] [STORAGE Storage_Clause] Creates a materialized view log, which is a … - Selection from Oracle SQL: the Essential Reference [Book] Re: Drop materialized view Centinul Nov 11, 2011 1:33 PM ( in response to 899419 ) You don't find a single command or call to do this. Before dropping view, query on all_objects table. This is a bug in Oracle. If I try to create it, it says Name already exists. Oracle Database does not drop views, materialized views, and synonyms that are dependent on the view but marks them INVALID. Using materialized views against remote tables is … I faced similar issue when i tried to drop materialized view it says View doesn't exist. Specify the name of the view to be dropped. After you drop a materialized view log, some materialized views based on the materialized view log master table can no longer be fast refreshed. If you want only refresh view you can use BEGIN DBMS_SNAPSHOT.REFRESH( '"SCHEMA". Materialized Views in Oracle. ]materialized-view-name Remarks All data in the table is automatically deleted as part of the dropping process. These materialized views include rowid materialized views, primary key materialized views, and subquery materialized views. To reverse this clause, you must issue an ALTER MATERIALIZED VIEW ... REFRESH statement. Oracle will ignore any REFRESH statement on the materialized view issued from such a procedure. These materialized views include rowid materialized views, primary key materialized views, and subquery materialized views. You can drop them or redefine views and synonyms, or you can define other views in such a way that the invalid views and synonyms become valid again. All indexes and keys for the materialized view are dropped as well. If a view is referenced by other views, materialized views, or synonyms, Oracle will mark these objects INVALID, but does not remove them. 3) CASCADE CONSTRAINT Third, if a view has any constraint, you must specify the CASCADE CONSTRAINT clause to drop all referential integrity constraints that refer to primary key and unique keys in the view. Use this statement to remove a materialized view from the database. After you drop a materialized view log that was created FOR FAST REFRESH, some materialized views based on the materialized view log master table can no longer be fast refreshed. 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. CREATE/ALTER/DROP MATERIALIZED VIEW LOG CREATE MATERIALIZED VIEW LOG ON [schema.] Drop Materialized View Hangs with 'Enq: JI - Contention' (Doc ID 1126123.1) Last updated on NOVEMBER 07, 2019. "MVIEW_TB_NBN_DAILY"','C'); end; – li-on Sep 4 '15 at 8:56 1 A deadlock would be raised as a deadlock error, and could only happen between two sessions that are trying to modify the database. Part of the view but marks them INVALID JI - Contention ' ( Doc ID )! That are drop materialized view, oracle on the view but marks them INVALID create materialized view REFRESH! Such a procedure 'Enq: JI - Contention ' ( Doc ID 1126123.1 ) updated. Never REFRESH to prevent the materialized view LOG on [ SCHEMA. dropped as well on materialized... 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