materialized view refresh error log

They are local copies of data located remotely, or are used to create summary tables based on aggregations of a table’s data. The problem is when we need to refresh our Materialized Views, a lot of redo logs are gen My question is regarding the refresh of MVs. Materialized view log is a table associated with the master table of a materialized view. You may had to add WITH SEQUENCE to your log creation to cope with certain use as stated in Oracle documentation : Specify SEQUENCE to indicate that a sequence value providing additional ordering information should be recorded in the materialized view log. A materialized view log (snapshot log) is a schema object that records changes to a master table's data so that a materialized view defined on that master table can be refreshed incrementally. ORA-12034 means that your last refresh older than the materialized view log and no way to sync back to the master table due to some reasons. If a materialized view is configured to refresh on commit, you should never need to manually refresh … Sequence numbers are necessary to support fast refresh after some update scenarios. The frequency of this refresh can be configured to run on-demand or at regular time intervals. This means, if the SQL query of the materialized view has an execution time of two hours, the Complete Refresh … This clause can also be used to record additional columns. Use the ADD clause to augment the materialized view log so that it records the primary key values, rowid values, object ID values, or a sequence when rows in the materialized view master table are changed. Materialized View Refresh Hi Tom,I was at your conference in MTL in february. set NO FORCE LOGGING in the database; 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. CONNECT scott/tiger@db1 CREATE MATERIALIZED VIEW LOG ON scott.emp TABLESPACE users WITH PRIMARY KEY INCLUDING NEW VALUES; Refresh Materialized Views. It loads the contents of a materialized view from scratch. Contents. The simplest form to refresh a materialized view is a Complete Refresh. NOTE:365157.1 - Complete Refresh of Single Materialized View Is Doing Delete Instead of Truncate BUG:4217420 - REFRESH COMPLETE GENERATING A LOT OF ARCHIVED LOGS FOR A NOLOGGING MVIEW NOTE:334878.1 - Can Redo Generation Be Disabled During Materialized View Refresh Everything is owned by the same user = MGT2. Oracle Database - Enterprise Edition - Version 11.2.0.1 and later: Materialized View Refresh Error ORA-12048/ORA-00001 Oracle automatically purges rows in the materialized view log when they are no longer needed. ORA-12034 The materialized view log was younger than the last refresh. DB version is 10.2.0.2.0. A materialized view in Oracle is a database object that contains the results of a query. We are using Discoverer with a 9i Database in Archivelog mode. A complete refresh is required before the next fast refresh. It was a pleasure to finally meet you. mv_log_augmentation. I don't see anything of note in the alert log. In the example below note how the log table is empty after the refresh. 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. It don't remember it ever working. To stop recording any of this information, you must first drop the materialized view log and then re-create it. Materialized View Logs. The view is refreshed in a scheduled task via dbms_refresh.refresh right before the procedure that reads it is kicked off. Materialized views, which store data based on remote tables are also, know as snapshots. What is materialized view. 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