Methods inherited from class java.lang.Object getClass, notify, notifyAll, wait, wait, waitEnum Constant Detail FAST public static final MaterializedView.RefreshMethod FAST Oracle Database performs an incremental refresh applying changes that correspond to changes in the masters...
DBMS_MVIEW.REFRESH(MV_NAME,method =>'F'); 执行fast refresh, Oracle会首先识别当前主表和最后一次刷新 MV时候数据的变化,根据变化的数据更新 MV。当变化比较小的时候,Fast Refresh 比 Complete Refresh更加高效,因为数据量比较少。 因为fast refresh 时需要和最近一次更新后的数据进行比较,所以需要 MV所依赖的...
In the above example, the first copy of the materialized view is made at SYSDATE and the interval at which the refresh has to be performed is every two days. Summary Materialized Views thus offer us flexibility of basing a view on Primary key or ROWID, specifying refresh methods and specifyi...
Using nested materialized views, you can create multiple single-table materialized views based on a joins-only materialized view and the join is performed just one time. In addition, optimizations can be performed for this class of single-table aggregate materialized view and thus refresh is very ...
Oracle Database - Enterprise Edition - Version 19.3.0.0.0 and later: Materialized View Refresh Failing with errors ORA-12008 ORA-31600 ORA-30372
Figure 8: The Materialized View Tab in AWM 11g By selecting the "Enable Materialized View Refresh of the Cube" check box, the new cube materialized views are created for the cube and its dimensions when the cube is maintained. The cube materialized view naming convention uses the cube name ...
创建物化视图需要有CREATE TABLE权限。更多有关 OceanBase 数据库权限的详细介绍,请参见Oracle 模式下的权限分类。 语法 CREATEMATERIALIZEDVIEWview_name[column_list][table_option_list][partition_option][refresh_clause]ASview_select_stmt;column_list:(column_name[,column_name...])refresh_clause: REFRESH[COM...
name: The name (optionally schema-qualified) of the materialized view to refresh. Notes If there is an ORDER BY clause in the materialized view's defining query, the original contents of the materialized view will be ordered that way; but REFRESH MATERIALIZED VIEW does not guarantee to preserve...
Step 4: Consider the Materialized View Refresh Method Oracle provides various methods to refresh a materialized view. The refresh method determines how the materialized view is updated with new data from the source tables or views. There are three main refresh methods: - Complete: The materialized...
ON DEMAND指物化视图在用户需要的时候进行刷新,可以手工通过DBMS_MVIEW.REFRESH等方法来进行刷新,也可以通过JOB定时进行刷新。 ON COMMIT指出物化视图在对基表的DML操作提交的同时进行刷新。刷新的方法有四种:FAST、COMPLETE、FORCE和NEVE*。**ST刷新采用增量刷新,只刷新自上次刷新以后进行的修改。COMPLETE刷新对整个物化...