关于物化视图实验几个证明

在工作中涉及物化视图使用，存在一些疑问，通过实验证明了一下

 

1.对于 ON PREBUILT TABLE 方式建立的物化视图，如果DROP  MATERIALIZED VIEW后，原表是否会保留下来。答案：会

2.对于物化视图组，使用DBMS_REFRESH.DESTROY后，job是否会删除？ 答案：会

 

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PROMPT  1.对于 ON PREBUILT TABLE 方式建立的物化视图，如果DROP  MATERIALIZED VIEW后，原表是否会保留下来。 SQL> CREATE TABLE t_test AS SELECT * FROM dba_objects WHERE object_id IS NOT NULL;     Table created      SQL> alter table T_TEST   2    add constraint pk_id primary key (OBJECT_ID);     Table altered     SQL>  SQL> CREATE TABLE mv_test AS SELECT * FROM t_test;     Table created     SQL>  SQL> alter table MV_TEST   2    add constraint pk_mv_id primary key (OBJECT_ID);     Table altered     SQL> CREATE MATERIALIZED VIEW LOG ON t_test;     Materialized view log created         SQL>  SQL> CREATE MATERIALIZED VIEW mv_test   2    ON PREBUILT TABLE USING INDEX   3    REFRESH FORCE ON DEMAND   4    WITH PRIMARY KEY   5    AS   6    SELECT * FROM t_test;     Materialized view created     SQL> CREATE MATERIALIZED VIEW LOG ON mv_test WITH ROWID, SEQUENCE ;     Materialized view log created     SQL> select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> insert into t_test (object_id,object_name) values (307454,'T_TEST1');     1 row inserted     SQL> COMMIT;     Commit complete     SQL> select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     307454 4000-1-1    I         N         FEFF     SQL>  select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> DROP  MATERIALIZED VIEW mv_test;     Materialized view dropped     SQL> select count(*) from mv_test; SQL>        COUNT(*) ----------      81436    -- 表mv_test还是会保存的     SQL>  select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------    -- 物化视图删除后，物化视图日志增量数据被删除了     SQL> select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------         SQL> insert into t_test (object_id,object_name) values (307455,'T_TEST1');     1 row inserted     SQL> commit;     Commit complete     SQL> select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     307455 4000-1-1    I         N         FEFF     SQL> select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL>  SQL> CREATE MATERIALIZED VIEW mv_test   2    ON PREBUILT TABLE USING INDEX   3    REFRESH FORCE ON DEMAND   4    WITH PRIMARY KEY   5    AS   6    SELECT * FROM t_test;     Materialized view created     SQL> select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     -- 物化视图创建后后，物化视图日志增量数据会被删除了     SQL> select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> insert into t_test (object_id,object_name) values (307456,'T_TEST1');     1 row inserted     SQL> commit;     Commit complete     SQL>  select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     307456 4000-1-1    I         N         FEFF     SQL> select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> EXEC DBMS_MVIEW.REFRESH('MV_TEST','C');     PL/SQL procedure successfully completed    -- 全量刷新     SQL>  select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL>  select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> select count(*) from t_test;       COUNT(*) ----------      81439     SQL> select count(*) from mv_test;       COUNT(*) ----------      81439     SQL>  insert into t_test (object_id,object_name) values (307457,'T_TEST1');     1 row inserted     SQL> commit;     Commit complete     SQL> select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     307457 4000-1-1    I         N         FEFF     SQL>  select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> EXEC DBMS_MVIEW.REFRESH('MV_TEST','F');  -- 进行增量刷新     PL/SQL procedure successfully completed     SQL>  select * from mlog$_t_test;       OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> select * from mlog$_mv_test;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- -------------------------------------------------------------------------------- AABLD/AAZAABvT9AAU                                                                  1030001 4000-1-1    I         N         FEFF           PROMPT 2.对于物化视图组，使用DBMS_REFRESH.DESTROY后，job是否会删除？       SQL> CREATE TABLE t_test1 AS SELECT * FROM dba_objects WHERE object_id IS NOT NULL;     Table created SQL> CREATE TABLE t_test2 AS SELECT * FROM dba_objects WHERE object_id IS NOT NULL;     Table created SQL> CREATE TABLE t_test3 AS SELECT * FROM dba_objects WHERE object_id IS NOT NULL;     Table created     SQL>  SQL> CREATE MATERIALIZED VIEW mv_test1   2     BUILD IMMEDIATE   3     REFRESH FORCE ON DEMAND   4     WITH rowid   5     AS   6     SELECT * FROM t_test1;          Materialized view created     SQL> drop  MATERIALIZED VIEW mv_test1;     Materialized view dropped     SQL>  SQL> DROP TABLE t_test1;     Table dropped SQL> DROP TABLE t_test2;     Table dropped SQL> DROP TABLE t_test3;     Table dropped     SQL>  SQL> CREATE TABLE t_test1 AS SELECT * FROM dba_objects WHERE object_id IS NOT NULL;     Table created SQL> CREATE TABLE t_test2 AS SELECT * FROM dba_objects WHERE object_id IS NOT NULL;     Table created SQL> CREATE TABLE t_test3 AS SELECT * FROM dba_objects WHERE object_id IS NOT NULL;     Table created     SQL>  SQL> CREATE MATERIALIZED VIEW LOG ON t_test1 WITH ROWID, SEQUENCE ;     Materialized view log created SQL> CREATE MATERIALIZED VIEW LOG ON t_test2 WITH ROWID, SEQUENCE ;     Materialized view log created SQL> CREATE MATERIALIZED VIEW LOG ON t_test3 WITH ROWID, SEQUENCE ;     Materialized view log created     SQL>  SQL> CREATE MATERIALIZED VIEW mv_test1   2     BUILD IMMEDIATE   3     REFRESH FORCE ON DEMAND   4     WITH rowid   5     AS   6     SELECT * FROM t_test1;     Materialized view created SQL> CREATE MATERIALIZED VIEW mv_test2   2     BUILD IMMEDIATE   3     REFRESH FORCE ON DEMAND   4     WITH rowid   5     AS   6     SELECT * FROM t_test2;     Materialized view created SQL> CREATE MATERIALIZED VIEW mv_test3   2     BUILD IMMEDIATE   3     REFRESH FORCE ON DEMAND   4     WITH rowid   5     AS   6     SELECT * FROM t_test3;     Materialized view created     SQL>  SQL> insert into t_test (object_id,object_name) values (307458,'T_TEST1');     1 row inserted SQL> insert into t_test1 (object_id,object_name) values (307458,'T_TEST1');     1 row inserted SQL> insert into t_test2 (object_id,object_name) values (307458,'T_TEST1');     1 row inserted SQL> insert into t_test3 (object_id,object_name) values (307458,'T_TEST1');     1 row inserted     SQL> commit;     Commit complete     SQL>  SQL> select * from mlog$_t_test;      OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- --------------------------------------------------------------------------------     307458 4000-1-1    I         N         FEFF        SQL> select * from mlog$_t_test1;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- -------------------------------------------------------------------------------- AABLEMAAuAAA6u2AAA                                                                  1040001 4000-1-1    I         N         FEFF SQL> select * from mlog$_t_test2;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- -------------------------------------------------------------------------------- AABLENAAvAAACC2AAA                                                                  1040002 4000-1-1    I         N         FEFF SQL> select * from mlog$_t_test3;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- -------------------------------------------------------------------------------- AABLEOAAuAAA7C2AAA                                                                  1040003 4000-1-1    I         N         FEFF     SQL>  SQL> EXEC DBMS_MVIEW.REFRESH('MV_TEST','F');     PL/SQL procedure successfully completed SQL> EXEC DBMS_MVIEW.REFRESH('MV_TEST1','F');     PL/SQL procedure successfully completed SQL> EXEC DBMS_MVIEW.REFRESH('MV_TEST2','F');     PL/SQL procedure successfully completed SQL> EXEC DBMS_MVIEW.REFRESH('MV_TEST3','F');     PL/SQL procedure successfully completed     SQL>  SQL> select * from mlog$_t_test;      OBJECT_ID SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ ---------- ----------- --------- --------- -------------------------------------------------------------------------------- SQL> select * from mlog$_t_test1;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- -------------------------------------------------------------------------------- SQL> select * from mlog$_t_test2;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- -------------------------------------------------------------------------------- SQL> select * from mlog$_t_test3;     M_ROW$$                                                                          SEQUENCE$$ SNAPTIME$$  DMLTYPE$$ OLD_NEW$$ CHANGE_VECTOR$$ -------------------------------------------------------------------------------- ---------- ----------- --------- --------- --------------------------------------------------------------------------------     SQL> EXEC DBMS_REFRESH.MAKE('REP_CENTREX', 'MV_TEST,MV_TEST1,MV_TEST2,MV_TEST3', TRUNC(SYSDATE+1)+2/24, 'trunc(sysdate+1)+2/24');     PL/SQL procedure successfully completed     SQL> EXEC DBMS_REFRESH.REFRESH('REP_CENTREX');     PL/SQL procedure successfully completed     SQL> select * from user_jobs;            JOB LOG_USER                       PRIV_USER                      SCHEMA_USER                    LAST_DATE   LAST_SEC         THIS_DATE   THIS_SEC         NEXT_DATE   NEXT_SEC         TOTAL_TIME BROKEN INTERVAL                                                                           FAILURES WHAT                                                                             NLS_ENV                                                                          MISC_ENV                                                           INSTANCE ---------- ------------------------------ ------------------------------ ------------------------------ ----------- ---------------- ----------- ---------------- ----------- ---------------- ---------- ------ -------------------------------------------------------------------------------- ---------- -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- ---------------------------------------------------------------- ----------     2321 DAVID                          DAVID                          DAVID                                                                                    2012-12-22  02:00:00                  0 N      trunc(sysdate+1)+2/24                                                                       dbms_refresh.refresh('"DAVID"."REP_CENTREX"');                                   NLS_LANGUAGE='SIMPLIFIED CHINESE' NLS_TERRITORY='CHINA' NLS_CURRENCY='￥' NLS_ISO 0102000200000000                                                          0     -- 创建的REP_CENTREX的物化视图组定时刷新job    SQL> EXEC DBMS_REFRESH.DESTROY('REP_CENTREX');     PL/SQL procedure successfully completed     SQL> select * from user_jobs;            JOB LOG_USER                       PRIV_USER                      SCHEMA_USER                    LAST_DATE   LAST_SEC         THIS_DATE   THIS_SEC         NEXT_DATE   NEXT_SEC         TOTAL_TIME BROKEN INTERVAL                                                                           FAILURES WHAT                                                                             NLS_ENV                                                                          MISC_ENV                                                           INSTANCE ---------- ------------------------------ ------------------------------ ------------------------------ ----------- ---------------- ----------- ---------------- ----------- ---------------- ---------- ------ -------------------------------------------------------------------------------- ---------- -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- ---------------------------------------------------------------- ----------    -- job也同时删除了

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