1.创建原表和物化视图日志
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SQL> create table t1(id int,name varchar2(30));
Table created.
SQL> alter table t1 add constraint pk_t1 primary key(id) using index;
Table altered.
SQL> create materialized view log on t1 with primary key;
Materialized view log created.
2.创建目标表和物化视图
这里我创建是refresh fast on commit类型的物化视图
SQL> create table t2 as select * from t1 where 1=2;
Table created.
SQL> create materialized view t2 on prebuilt table refresh fast on commit as select * from t1;
Materialized view created.
3.简单测试
在t1插入一条数据，一提交t2即存在数据
SQL> insert into t1 values(1,'A');
1 row created.
SQL> commit;
Commit complete.
SQL> select * from t2;
ID NAME
---------- ------------------------------
1 A
4.ddl测试
通过测试我们发现物化视图不支持ddl语句
我们给t1添加一个列和rename一个列
SQL> alter table t1 add ddl_test int;
Table altered.
SQL> alter table t1 rename column name to names;
Table altered.
SQL> select * from t2;
ID NAME
---------- ------------------------------
1 A
2 4
SQL> insert into t1 values(3,'x',1234);
1 row created.
SQL> commit;
Commit complete.
SQL> select * from t1;
ID NAMES DDL_TEST
---------- ------------------------------ ----------
1 A
2 4
3 x1234
SQL> select * from t2;
ID NAME
---------- ------------------------------
1 A
2 4
发现数据没有过来，我们看一下物化视图的定义和状态
SQL> select dbms_metadata.get_ddl('MATERIALIZED_VIEW','T2') from dual;
DBMS_METADATA.GET_DDL('MATERIALIZED_VIEW','T2')
--------------------------------------------------------------------------------
CREATE MATERIALIZED VIEW "SCOTT"."T2" ("ID", "NAME")
ON PREBUILT TABLE WITH
SQL> select staleness from user_mviews;
STALENESS
-------------------
COMPILATION_ERROR
分享标题：Oracle使用物化视图实现表数据同步
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