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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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 |