我创建了一个物化视图,每5分钟刷新一次,但是当我在物化视图中插入并执行select时,我得到相同的旧数据?我需要手动刷新吗?
CREATE MATERIALIZED VIEW MVW_TEST
REFRESH FORCE ON DEMAND
START WITH TO_DATE('01-01-2009 00:01:00', 'DD-MM-YYYY HH24:MI:SS') NEXT SYSDATE + 1/1152
As select * from TEST12
答案 0 :(得分:23)
我已逐步演示了在每个one minute
之后物化视图刷新的步骤
使用5分钟后刷新的mv next(sysdate+5/1440)
第1步:
Create table temp (A int);
步骤2:
Create Materialized view temp_mv
refresh complete start with (sysdate) next (sysdate+1/1440) with rowid
as select * from temp;
第3步:
select count(*) from temp;
COUNT(*)
----------
0
步骤4:
select count(*) from temp_mv;
COUNT(*)
----------
0
步骤5:
begin
for i in 1..10 loop
insert into temp values (i+1);
end loop;
end;
/
Step6:
commit;
Step7:
select count(*) from temp;
COUNT(*)
----------
10
步骤8:
select count(*) from temp_mv;
COUNT(*)
----------
0
Step9:
select to_char(sysdate,'hh:mi') from dual;
TO_CH
-----
04:28
步骤10:
select to_char(sysdate,'hh:mi') from dual;
TO_CH
-----
04:29
步骤11:
select count(*) from temp;
COUNT(*)
----------
10
步骤12:
select count(*) from temp_mv;
COUNT(*)
----------
10
答案 1 :(得分:4)
您还可以创建调度程序作业:
BEGIN
SYS.DBMS_SCHEDULER.CREATE_JOB
(
job_name => 'DBAPER.MVW_TEST_REFRESH'
,start_date => TO_TIMESTAMP_TZ('2011/09/02 00:00:00.000000 US/Central','yyyy/mm/dd hh24:mi:ss.ff tzr')
,repeat_interval => 'FREQ=DAILY;BYHOUR=6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22;BYMINUTE=0,5,10,15,20,25,30,35,40,45,50,55'
,end_date => NULL
,job_class => 'DEFAULT_JOB_CLASS'
,job_type => 'PLSQL_BLOCK'
,job_action => 'BEGIN
DBMS_MVIEW.REFRESH(''MVW_TEST'',''C'');
END;'
,comments => 'Job to refresh materialized view MVW_TEST.'
);
END;
/
这样您就有了更多的配置选项,例如排除夜间或周末等。