If a materialized view group was created with a deployment template, then, before you drop the materialized view group at the remote materialized view site, you need to execute the DROP_SITE_INSTANTIATION procedure at the target master site of the materialized view group. When I query DBA_SNAPSHOTS the materialized view is not included. It also specifies what refresh strategy should be used in which scenario. The underlying SELECT is based on ONE SOURCE table. I’ll come back on that later and probably in another post. This statement creates a materialized view called part_sales_mv, which uses three partitions, can be fast refreshed, and is eligible for query rewrite: Special care on view log. The Video explains the different refresh options available for materialized views. Hi, I am doing complete refresh on a materialized view using below command. Can you please help me to solve the issue. Dropping a Materialized View Group Created with a Deployment Template. These MVs themselves are marked as INVALID. Can you please explain how materialized views can be used for replication?2. Please give example on those scenarios where 're DROP MATERIALIZED VIEW project-id.my_dataset.my_mv_table. Before dropping view, query on all_objects table. Using materialized views against remote tables is the simplest way to achieve replication of data between sites. FAST refresh was not use because its hangs. It is best to remove from a group before dropping a view. When I query DBA_OBJECTS it shows that the object is present as a table. Drop Materialized View takes a long time Recently I had to drop a couple of large Materialized View. 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. 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 If i tried to drop the materialized view then also it hanged and not able to drop the materialized views. Materialized Views, Materialize optimizer hint In your book you mention that you use materialize views to pre answer large queries, but you also did mention that they can also be used for effective replication. Materialized Views in Oracle. create materialized view mv_xyz refresh force on demand as select column1, column2, column3 from tab1@dblink1 where column4 = 1 and 1=2 --included this, still hangs; It appears that the result set is irrelevant to the problem itself. Home » Articles » 19c » Here. 1. Click Compose new query. I've been trying to DROP an MV which is defined as REFRESH ON DEMAND and there are no locks anywhere. To delete a materialized view in the Cloud Console by using a DDL statement: Open the BigQuery page in the Cloud Console. Thanks, Harsh Partitioning a materialized view involves defining the materialized view with the standard Oracle partitioning clauses, as illustrated in the following example. While querying Materialized View, it gives data directly from Materialized View and not from table. CREATE/ALTER/DROP MATERIALIZED VIEW LOG CREATE MATERIALIZED VIEW LOG ON [schema.] CREATE/ALTER/DROP MATERIALIZED VIEW CREATE MATERIALIZED VIEW [schema.] Look at the erro rmessage again. 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. If I try to create it, it says Name already exists. 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