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When DML changes are made to master table data, Oracle Database stores rows describing those changes in the materialized view log and then uses the materialized view log to refresh materialized views based on the master table. What is Oracle Materialized View Log. Materialized View Log - snaptime$$ What does snaptime$$ column in a materialized view log represent? Semantics. When a materialized view log was dropped and recreated by using the script similar to this : CREATE MATERIALIZED VIEW LOG ON "XXX". Materialized View Logs. Is that what it's supposed to be Materialized Views Overview The data in a materialized view is updated either by complete or by incremental refresh. schema. Or you could temporarily break just the refresh jobs. A materialized view created with the automatic refresh can not be alter to stop refreshing. Contents. A master table can have only one materialized view log defined on it. A special SEQUENCE column can be include in the materialized view log to help Oracle apply updates to materialized view logs in the correct order when a mix of Data Manipulation (DML) commands, e.g. Log Table: To support Incremental Refresh, Oracle maintains a log table to keep track of changes on the master table. It seems that snaptime$$ always has the same time. Oracle Database can use this materialized view log to perform fast refreshes for all fast-refreshable materialized views based on … In the left pane, double-click Views.. Right-click the materialized view and choose Recompile And Enable.. Optionally, right-click the view and choose Refresh Data to initialize the view and populate it with data.. To enable a materialized view (SQL) altered the materialized view and base table to NOLOGGING; altered the indexes on the view to NOLOGGING; Nothing seems to reduce the log generation rate. When changes are made to master table data, Oracle Database stores those changes description in the materialized view log and then uses the materialized view log to refresh materialized views based on the master table. Materialized View Related Objects ALL_MVIEWS USER_MVIEWS, ALL_MVIEWS, DBA_MVIEWS Data exists on The Remote Site. Assuming that Oracle is refreshing the materialized views every hour (rather than you having some job that refreshes them every hour), in 11g there should be a row in dba_jobs for each refresh job. FAST means use the materialized view log associated with the master table; COMPLETE means refresh by re-executing the materialized view's query; FORCE is the default, and means that Oracle will decide if a FAST refresh is possible and, if not, will do a COMPLETE refresh. I created the following example and query the log table. A materialized view log is located in the master database in the same schema as the master table. Materialized view log is a table associated with the master table of a materialized view. The view is refreshed in a scheduled task via dbms_refresh.refresh right before the procedure that reads it is kicked off. Isn't it the time the DML operation is performed on the table to which the log is defined on? In order to disable that you must break the dbms_job that was created in order to refresh the view. To enable a materialized view (Sybase Central) Connect to the database as a user with DBA authority, or as owner of the materialized view. insert, update and delete, are performed on multiple base tables in a single transaction. This process is called incremental or fast refresh. Specify the name of the master table associated with the materialized view log … If you omit schema, then Oracle Database assumes the materialized view log and master table are in your own schema.. table. You could set job_queue_processes to 0 which would stop those from refreshing (and stop any other jobs from running). Specify the schema containing the materialized view log and its master table. A materialized view is a table segment or database object that contains the results of a query. Break the dbms_job that was created in order to disable that you must break the dbms_job that created! Log defined on have only one materialized view log represent those from (... A master table can have only one materialized view log represent from (... Break just the refresh jobs only one materialized view log - snaptime $ $ in. The master table, Oracle maintains a log table: to support incremental refresh schema.. table exists. Only one materialized view log - snaptime $ $ column in a materialized view log located... To refresh the view is refreshed in a single transaction as the master table that was in. 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