物化视图操作示例
1. 创建物化视图需要的权限:
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01.GRANT CREATE MATERIALIZED VIEW TO USER_NAME;
GRANT CREATE MATERIALIZED VIEW TO USER_NAME;
2. 在源表建立物化视图日志
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01.CREATE MATERIALIZED VIEW LOG ON DAVE
02.TABLESPACE&BISONCU_SPACE -- 日志空间
03.WITH PRIMARY KEY; -- 指定为主键类型
CREATE MATERIALIZED VIEW LOG ON DAVE
TABLESPACE&BISONCU_SPACE -- 日志空间
WITH PRIMARY KEY; -- 指定为主键类型
3. 授权给中间用户
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01.GRANT SELECT ON DAVE TO ANQING;
02.GRANT SELECT ON MLOG$_DAVE TO ANQING;
GRANT SELECT ON DAVE TO ANQING;
GRANT SELECT ON MLOG$_DAVE TO ANQING;
4. 在目标数据库上创建MATERIALIZED VIEW
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01.CREATE MATERIALIZED VIEW AICS_DAVE
02.TABLESPACE&BISONCS_SPACE
03.REFRESH FAST
04. ON DEMAND
05. --第一次刷新时间
06. --START WITH to_date('2012-01-01 20:00:00', 'yyyy-mm-dd hh24:mi:ss')
07. START WITH SYSDATE
08. --刷新时间间隔。每1天刷新一次,时间为凌晨2点
09. --NEXT TRUNC(SYSDATE,'dd')+1+2/24
10. NEXT SYSDATE+1/24/20
11.WITH PRIMARY KEY
12.--USING DEFAULT LOCAL ROLLBACKSEGMENT
13.DISABLE QUERY REWRITE AS
14.SELECT MODEL_ID, STATUS,MODEL_NAME, MANU_ID, DESCRIPTION, CREATE_TIME, UPDATE_TIME, SW_VERSION
15.FROM AICS_DAVE@LINK_DAVE;
CREATE MATERIALIZED VIEW AICS_DAVE
TABLESPACE&BISONCS_SPACE
REFRESH FAST
ON DEMAND
--第一次刷新时间
--START WITH to_date('2012-01-01 20:00:00', 'yyyy-mm-dd hh24:mi:ss')
START WITH SYSDATE
--刷新时间间隔。每1天刷新一次,时间为凌晨2点
--NEXT TRUNC(SYSDATE,'dd')+1+2/24
NEXT SYSDATE+1/24/20
WITH PRIMARY KEY
--USING DEFAULT LOCAL ROLLBACKSEGMENT
DISABLE QUERY REWRITE AS
SELECT MODEL_ID, STATUS,MODEL_NAME, MANU_ID, DESCRIPTION, CREATE_TIME, UPDATE_TIME, SW_VERSION
FROM AICS_DAVE@LINK_DAVE;
5. 在目标物化视图上创建索引
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01.CREATE INDEX IDX_T_DV_CT
02. ON AICS_DEV_INFO (CREATE_TIME, UPDATE_TIME)
03. TABLESPACE &BISON_IDX;
04.
05.CREATE INDEX IDX_T_DV_UT
06. ON AICS_DEV_INFO (UPDATE_TIME)
07. TABLESPACE &BISON_IDX;
08.
09.CREATE INDEX I_T_DV_MSISDN
10. ON AICS_DEV_INFO (MSISDN)
11. TABLESPACE &BISON_IDX;
CREATE INDEX IDX_T_DV_CT
ON AICS_DEV_INFO (CREATE_TIME, UPDATE_TIME)
TABLESPACE &BISON_IDX;
CREATE INDEX IDX_T_DV_UT
ON AICS_DEV_INFO (UPDATE_TIME)
TABLESPACE &BISON_IDX;
CREATE INDEX I_T_DV_MSISDN
ON AICS_DEV_INFO (MSISDN)
TABLESPACE &BISON_IDX;
6. 物化视图刷新说明
(1)使用dbms_mview.refresh 手工刷新
如:
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01.EXEC DBMS_MVIEW.REFRESH('MV_DAVE');
02.
03.--完全刷新
04.EXEC DBMS_MVIEW.REFRESH(LIST => 'MV_DAVE',METHOD => 'c');
05.EXEC DBMS_MVIEW.REFRESH('MV_DAVE','C');
06.
07.--快速刷新
08.EXEC DBMS_MVIEW.REFRESH(LIST => 'MV_DAVE',METHOD => 'f');
09.EXEC DBMS_MVIEW.REFRESH('MV_DAVE','F');
EXEC DBMS_MVIEW.REFRESH('MV_DAVE');
--完全刷新
EXEC DBMS_MVIEW.REFRESH(LIST => 'MV_DAVE',METHOD => 'c');
EXEC DBMS_MVIEW.REFRESH('MV_DAVE','C');
--快速刷新
EXEC DBMS_MVIEW.REFRESH(LIST => 'MV_DAVE',METHOD => 'f');
EXEC DBMS_MVIEW.REFRESH('MV_DAVE','F');
(2)使用dbms_refresh.refresh 过程来批量刷新MV
如果我们在创建物化视图的过程指定start 和next time的刷新时间,那么Oracle 会自动创建刷新的job,并采用dbms_refresh.refresh 的方式。
使用这种方式刷新之前需要先make refresh group,然后才可以刷新。
Refreshmake 的语法可以参考:
http://docs.oracle.com/cd/B19306_01/server.102/b14227/rarrefreshpac.htm#i94057
示例:
假设存在物化视图MV_T1, MV_T2, MV_T3. 创建refresh group的语法如下:
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01.SQL> EXEC DBMS_REFRESH.MAKE('REP_TEST', 'MV_T1,MV_T2,MV_T3', SYSDATE, 'SYSDATE+ 1')
02.
03.--刷新整个refresh group 组:
04.SQL> EXEC DBMS_REFRESH.REFRESH('REP_TEST')
SQL> EXEC DBMS_REFRESH.MAKE('REP_TEST', 'MV_T1,MV_T2,MV_T3', SYSDATE, 'SYSDATE+ 1')
--刷新整个refresh group 组:
SQL> EXEC DBMS_REFRESH.REFRESH('REP_TEST')
7. 删除物化视图及日志
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01.--删除物化视图日志:
02.DROP MATERIALIZED VIEW LOG ON DAVE;
03.--删除物化视图
04.DROP MATERIALIZED VIEW MV_DAVE;
--删除物化视图日志:
DROP MATERIALIZED VIEW LOG ON DAVE;
--删除物化视图
DROP MATERIALIZED VIEW MV_DAVE;
8. 查看物化视图刷新状态信息
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01.SQL> SELECT MVIEW_NAME, LAST_REFRESH_DATE, STALENESS FROMUSER_MVIEWS;
02.SQL> SELECT NAME, LAST_REFRESH FROM USER_MVIEW_REFRESH_TIMES;
SQL> SELECT MVIEW_NAME, LAST_REFRESH_DATE, STALENESS FROMUSER_MVIEWS;
SQL> SELECT NAME, LAST_REFRESH FROM USER_MVIEW_REFRESH_TIMES;
9. 查询物化视图日志:
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01.SELECT * FROM MLOG$_DAVE;
物化视图操作示例
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转载自gaoke.iteye.com/blog/1763802
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