物化视图日志(Materialized View Log,mlog)用于记录基表(普通表或物化视图)的增量更新数据,以支持物化视图的快速刷新功能。mlog 是一个记录表,追踪基表的变化,并将这些变化应用于相应的物化视图,实现快速刷新。 说明 OceanBase 数据库 mlog 暂时不支持指定 Partition,mlog 的Partition 和基表的 Part
The FAST refreshes use the materialized view logs (as seen above) to send the rows that have changed from master tables to the materialized view. You should create a materialized view log for the master tables if you specify the REFRESH FAST clause. SQL> CREATE MATERIALIZED VIEW LOG ON emp;...
我们将对这些活跃表创建 materialized view log,以实现首次全量数据加载,后续增量刷新的功能,而其它“静态表”及对象则在停机窗口中借助数据泵导入。步骤如下: 源– 统计有效数据为创建新 RDS Oracle 实例作参考 目标 – 创建新实例,创建表空间 目标 – 导入活跃表(metadata only) 源– 给活跃表创...
Methods inherited from interface oracle.javatools.util.DynamicPropertySet getProperty, getProperty, setProperties, setPropertyField Detail TYPE public static final java.lang.String TYPE See Also: Constant Field Values Constructor Detail MaterializedViewLog public MaterializedViewLog() MaterializedViewLog publ...
创建物化视图日志需要有 CREATE TABLE 和基表的 SELECT 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CREATE MATERIALIZED VIEW LOG ON [schema.] table [parallel_clause] [with_clause] [mv_log_purge_clause]; parallel_clause: NOPARALLEL | PARALLEL integer with_...
view log master table. If you omitschema, then Oracle Database assumes the master table is contained in your own schema. Oracle Database creates the materialized view log in the schema of its master table. You cannot create a materialized view log for a table in the schema of the userSYS...
Oracle-Materialized View解读 物化视图概述 物化视图(Materialized View)在9i以前的版本叫做快照(SNAPSHOT),从9i开始改名叫做物化视图。 Oracle的物化视图是包括一个查询结果的数据库对像,它是远程数据的的本地副本,或者用来生成基于数据表求和的汇总表。 物化视图可以用于预先计算并保存表连接或聚集等耗时较多的操作的...
http://docs.oracle.com/cd/B12037_01/server.101/b10759/statements_6003.htm @@@ SQL> ed CREATE MATERIALIZED VIEW LOG ON oe.product_information WITH ROWID, SEQUENCE (list_price, min_price, category_id) INCLUDING NEW VALUES; SQL> /
ALTER MATERIALIZED VIEW LOG scott.emp STORAGE (NEXT 50K);Remove the materialized view log associated with scott's emp table from the database:DROP MATERIALIZED ... Get Oracle SQL: the Essential Reference now with the O’Reilly learning platform. O’Reilly members experience books, live events,...
ALTER MATERIALIZED VIEW LOG mvlog_test TABLESPACE temptbls * ERROR at line 1: ORA-32405: 无法修改现有物化查看日志的表空间 一般处理方法及步骤 您可以采取以下步骤来解决此ORA-32405错误: 1)创建一个新表空间 2)再次尝试更改表空间 mvlog_test