How to refresh a materialized with DBMS_SCHEDULER view. CREATE_JOB();
I am trying to refresh the MView manually (on request). For this
1. I created a MV.
2. then a SP for update using DBMS_MVIEW. REFRESH()
3. and then anonymous block for CREATE_JOB
But the job is not running. Its status is failed display.
When I tried to run
DBMS_SCHEDULER. RUN_JOB ('MY_MVIEW_REFRESH', TRUE); -No performance
But DBMS_SCHEDULER. RUN_JOB ('MY_MVIEW_REFRESH', FALSE); -Execution successfully.
So, please suggest, what should I do to update.
Mv_emp CREATE MATERIALIZED VIEW
IMMEDIATE CONSTRUCTION
REFRESH THE STRENGTH TO DEMAND
ACTIVATE THE QUERY REWRITING
AS
SELECT deptno, SUM (sal) OF emp
GROUP BY deptno;
CREATE OR REPLACE PROCEDURE refresh_mv_emp
AS
BEGIN
DBMS_MVIEW. REFRESH ('MV_EMP');
END;
BEGIN
DBMS_SCHEDULER. CREATE_JOB
(
job_name = > 'MY_MVIEW_REFRESH ',.
job_type = > 'PLSQL_BLOCK ',.
job_action = > 'REFRESH_MV_EMP ',.
number_of_arguments = > 0,
start_date = > SYSTIMESTAMP,
repeat_interval = > 'FREQ = DAILY;',
End_date = > NULL,
enabled = > TRUE,
auto_drop = > FALSE,
Comments = > 'refresh MV_EMP daily job. "
);
END;
I'm surprised that it worked with the value TRUE. Apparently oracle encapsulates job action in BEGIN END during the performance of work in a separate session. In any case, change of employment to procedure_stockee type:
SQL > CREATE MATERIALIZED VIEW mv_emp
2 BUILD IMMEDIATE
3 REFRESH FORCE ON REQUEST
4. TURN ON QUERY REWRITE
5 AS
6. SELECT deptno, SUM (sal) sum_sal FROM emp
7 GROUP BY deptno;
Materialized view created.
SQL >
SQL > CREATE OR REPLACE PROCEDURE refresh_mv_emp
2 AS
3 BEGIN
DBMS_MVIEW 4. REFRESH ('MV_EMP');
5 END;
6.
Created procedure.
SQL > START
2 DBMS_SCHEDULER. CREATE_JOB
3 (
job_name 4-online "MY_MVIEW_REFRESH."
job_type 5-online 'Procedure_stockee', 'PLSQL_BLOCK ',.
6 job_action => 'REFRESH_MV_EMP. "
7 number_of_arguments-online 0
start_date 8-online SYSTIMESTAMP.
repeat_interval 9-online 'FREQ = all DAYS;',
10-online NULL end_date,
11 active => TRUE,
12 auto_drop => FALSE,
13 comments => "this job refresh MV_EMP every day.
14 );
15 END;
16.
PL/SQL procedure successfully completed.
SQL > exec DBMS_SCHEDULER. RUN_JOB ('MY_MVIEW_REFRESH', TRUE);
PL/SQL procedure successfully completed.
SQL > exec DBMS_SCHEDULER. RUN_JOB ('MY_MVIEW_REFRESH', FALSE);
PL/SQL procedure successfully completed.
SQL >
SY.
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