Check status , enable and disable the Audit in Oracle Check the status of audit is Enable or Disable. Some materialized views have status … insert, update and delete, are performed on multiple base tables in a single transaction. SQL> select owner, mview_name, last_refresh_type, last_refresh_date from dba_mviews/user_mviews; If you were refreshing these MVs using DBMS_SCHEDULER :- Materialized View Logs. Here is a SQL statement to check the generated job status for Oracle materialized views: Conclusion Oracle materialized views are quite complex in nature and require a significant understanding to be used effectively. it works but materialized view does not refresh with each 15 minutes. Materialized view log is a table associated with the master table of a materialized view. 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 is quite a complicated query involving a few tables, not any view, and is refreshed nightly via a job. A materialized view is a database object that contains the results of a query. Contents. What is materialized views in oracle. Oracle Database Exadata Cloud Machine - Version N/A and later Oracle Cloud Infrastructure - Database Service - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Information in this document applies to any platform. 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. SQL> show parameter audit_trail Brief of following parameter values: NONE- Auditing is disabled. What is going on is that, during the day, periodically, the materialized view, and the ones based on it, are set to an INVALID state, as can be seen by inspecting the user_objects view. Therefore, whenever a transaction commits which has updated the tables on which a materialized view is defined, those changes are automatically reflected in the materialized view. The status shown in the DBA_OBJECTS view is INVALID. Materialized Views in Oracle; Introduction. Symptoms. Re: check materialized view refresh history 592815 Jun 24, 2009 8:51 PM ( in response to Boochi ) Hi Boochi, Thanks for your help. After upgrading a database from Oracle 10g to 11.2.0.2, all Materialized Views (MViews) show a status of COMPILATION_ERROR (in the DBA_MVIEWS view). In this article, we discuss a feature of the Oracle Database that you can include in your arsenal: materialized views. However, the Materialized View itself is fine and the data can be refreshed without issues. A materialized view can be refreshed automatically using the ON COMMIT method. Originally called snapshots, materialized views were introduced in Oracle8i and are only available in the Enterprise Edition. DB,EXTENDED- As DB,but the SQL_BIND … It is different from simple oracle view.These materialized view have data stored and when you query the materialized view,it returns data from the data stored. The complication comes from the lag between the last refresh of the materialized view and subsequent DML … Like a regular view, the data in a materialized view results … You can use the following query to check when the MVs were last refreshed. DB- Auditing is enabled,(all audit records stored in table(SYS.AUD$). 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. 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