Oracle Scheduler学习
参考文档：
Primary Note: Overview of Oracle Scheduler (Doc ID 1485539.1)
Oracle® Database Administrator's Guide
12c Release 1 (12.1)
E17636-21
Chapter(30) Administering Oracle Scheduler
Examples of Using the Scheduler
http://docs.oracle.com/cd/E16655_01/server.121/e17636/schedadmin.htm#ADMIN12062
Oracle® Database Administrator's Guide
12c Release 1 (12.1)
E17636-21
Chapter(28) Oracle Scheduler Concepts
http://docs.oracle.com/cd/E16655_01/server.121/e17636/schedover.htm#ADMIN033
Oracle® Database PL/SQL Packages and Types Reference
12c Release 1 (12.1)
E17602-14
Chapter(138) DBMS_SCHEDULER
http://docs.oracle.com/cd/E16655_01/appdev.121/e17602/d_sched.htm#ARPLS72235
Oracle® Database
Database Administrator’s Guide 19c
E96348-16 September 2022
https://docs.oracle.com/en/database/oracle/oracle-database/19/admin/index.html
Creating a scheduler job that inserts the systimestamp into a table every second
SQL> create table messages (message varchar2(100) not null);
Table created.
SQL> select * from messages;
no rows selected
SQL> Begin
2 DBMS_SCHEDULER.CREATE_JOB (
3 job_name => 'job_runs_every_second',
4 job_type => 'PLSQL_BLOCK',
5 job_action => 'Begin insert into messages values (''Current Timestamp is: '' || SYSTIMESTAMP); commit; End;',
6 start_date => SYSTIMESTAMP,
7 repeat_interval => 'freq=secondly; interval=1',
8 end_date => null,
9 enabled => TRUE,
10 comments => 'A job scheduled to insert into messages table the current timestamp every second');
11 End;
12 /
PL/SQL procedure successfully completed.
SQL> Begin
2 DBMS_SCHEDULER.RUN_JOB (job_name => 'job_runs_every_second');
3 End;
4 /
PL/SQL procedure successfully completed.
SQL> select * from messages;
MESSAGE
----------------------------------------------------------------------------------------------------
Current Timestamp is: 24-AUG-12 04.57.00.647000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.01.624000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.02.757000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.03.807000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.04.816000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.05.814000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.06.813000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.07.812000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.08.813000 PM +02:00
Current Timestamp is: 24-AUG-12 04.57.09.810000 PM +02:00
10 rows selected.
SQL> Begin
2 DBMS_SCHEDULER.DISABLE (name => 'job_runs_every_second', FORCE=>TRUE);
3 End;
4 /
PL/SQL procedure successfully completed.
SQL> Begin
2 DBMS_SCHEDULER.DROP_JOB (job_name => 'job_runs_every_second');
3 End;
4 /
PL/SQL procedure successfully completed.
SQL> drop table messages;
Table dropped.Creating a scheduler job that gathers CBO stats every day at mid-night and every weekend day at 06:00 am
-- create weekdays schedule
SQL> Begin
2 DBMS_SCHEDULER.CREATE_SCHEDULE (
3 schedule_name => 'WEEKDAYS_MID_NIGHTS_SCHEDULE',
4 start_date => NULL, -- If start_date is null, then the date that the job or window is enabled is used.
5 repeat_interval => 'freq=daily;byhour=0;byminute=0;bysecond=0;byday=MON,TUE,WED,THU,FRI',
6 end_date => NULL,
7 comments => 'starts every day Mon-Fri at 12:00 am');
8 End;
9 /
PL/SQL procedure successfully completed.
-- create weekends schedule
SQL> Begin
2 DBMS_SCHEDULER.CREATE_SCHEDULE (
3 schedule_name => 'WEEKENDS_SCHEDULE',
4 start_date => NULL, -- If start_date is null, then the date that the job or window is enabled is used.
5 repeat_interval => 'freq=daily;byhour=6;byminute=0;bysecond=0;byday=SAT,SUN',
6 end_date => NULL,
7 comments => 'starts every weekend SAT-SUN at 06:00 am');
8 End;
9 /
PL/SQL procedure successfully completed.
-- create weekdays window
SQL> Begin
2 DBMS_SCHEDULER.CREATE_WINDOW (
3 window_name => 'WEEKDAYS_MID_NIGHTS_WINDOW',
4 resource_plan => 'DEFAULT_MAINTENANCE_PLAN',
5 schedule_name => 'WEEKDAYS_MID_NIGHTS_SCHEDULE',
6 duration => '0 06:00:00',
7 window_priority => 'HIGH',
8 comments => 'window opens every day Mon-fri at 12:00 am and ends at 06:00 am');
9 End;
10 /
PL/SQL procedure successfully completed.
-- create weekends window
SQL> Begin
2 DBMS_SCHEDULER.CREATE_WINDOW (
3 window_name => 'WEEKENDS_WINDOW',
4 resource_plan => 'DEFAULT_MAINTENANCE_PLAN',
5 schedule_name => 'WEEKENDS_SCHEDULE',
6 duration => '0 06:00:00',
7 window_priority => 'HIGH',
8 comments => 'window opens every Saturday & Sunday at 06:00 am');
9 End;
10 /
PL/SQL procedure successfully completed.
-- create a window group for both weekdays and weekends schedule
SQL> Begin
2 DBMS_SCHEDULER.CREATE_GROUP (
3 group_name => 'MAINTENANCE_GROUP',
4 group_type => 'WINDOW',
5 member => 'WEEKDAYS_MID_NIGHTS_WINDOW,WEEKENDS_WINDOW',
6 comments => 'This group is designed for grouping weekdays and weekends maintenance windows');
7 End;
8 /
PL/SQL procedure successfully completed.
-- create stored procedure
SQL> CREATE OR REPLACE PROCEDURE "SYS"."GATHER__STATISTICS_PROC" AS
2 Begin
3 DBMS_STATS.GATHER_SCHEMA_STATS(ownname => '', estimate_percent => 100);
4 End;
5 /
Procedure created.
-- create program that runs the stored procedure
SQL> Begin
2 DBMS_SCHEDULER.CREATE_PROGRAM (
3 program_name => 'GATHER__STATS_PROGRAM',
4 program_type => 'STORED_PROCEDURE',
5 program_action => '"SYS"."GATHER__STATISTICS_PROC"',
6 number_of_arguments => 0,
7 enabled => TRUE,
8 comments => 'This is the program unit that calls the concerned stored procedure');
9 End;
10 /
PL/SQL procedure successfully completed.
-- create job
SQL> Begin
2 DBMS_SCHEDULER.CREATE_JOB (
3 job_name => 'GATHER__STATISTICS_JOB',
4 program_name => 'GATHER__STATS_PROGRAM',
5 schedule_name => 'MAINTENANCE_GROUP',
6 enabled => TRUE,
7 auto_drop => FALSE,
8 comments => 'Job that gathers CBO stats for schema everyday at 12:00 am and every weekend at 06:00 am',
9 job_style => 'REGULAR');
10 End;
11 /
PL/SQL procedure successfully completed. File Watcher Case Study
SQL*Plus: Release 12.1.0.1.0 Production on Thu Mar 6 13:31:09 2014
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Enter user-name: / as sysdba
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
SQL> --
SQL> -- Setting the monitoring repeat interval to 1 minute
SQL> --
SQL> begin
2 dbms_scheduler.set_attribute ('FILE_WATCHER_SCHEDULE', 'REPEAT_INTERVAL', 'FREQ=MINUTELY;INTERVAL=1');
3 end;
4 /
PL/SQL procedure successfully completed.
SQL> grant dba to fw identified by fw;
Grant succeeded.
SQL> conn fw/fw
Connected.
SQL> --
SQL> -- creating necessary credential
SQL> --
SQL> begin
2 dbms_scheduler.create_credential('FW_CREDENTIAL', 'Administrator', 'vcap4CEL');
3 end;
4 /
PL/SQL procedure successfully completed.
SQL> --
SQL> -- creating file watcher
SQL> --
SQL> begin
2 dbms_scheduler.create_file_watcher (
3 file_watcher_name => 'FW_FILE_WATCHER',
4 directory_path => 'C:\xxx',
5 file_name => '*.txt',
6 credential_name => 'FW_CREDENTIAL',
7 destination => null,
8 enabled => false);
9 end;
10 /
PL/SQL procedure successfully completed.
SQL> --
SQL> -- creating monitoring table
SQL> --
SQL> create table fw_monitoring (
2 file_timestamp timestamp with time zone,
3 directory_path varchar2(4000),
4 file_size number);
Table created.
SQL> --
SQL> -- creating procedure
SQL> --
SQL> create or replace procedure FW_PROC (fw_result in sys.scheduler_filewatcher_result) as
2 begin
3 insert into fw_monitoring values (
4 fw_result.file_timestamp,
5 fw_result.directory_path || '/' || fw_result.actual_file_name,
6 fw_result.file_size);
7 end;
8 /
Procedure created.
SQL> --
SQL> -- creating program
SQL> --
SQL> begin
2 dbms_scheduler.create_program (
3 program_name => 'FW.FW_PROG',
4 program_type => 'STORED_PROCEDURE',
5 program_action => 'FW_PROC',
6 number_of_arguments => 1,
7 enabled => false);
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> --
SQL> -- defining metadata argument
SQL> --
SQL> begin
2 dbms_scheduler.define_metadata_argument (
3 program_name => 'FW.FW_PROG',
4 metadata_attribute => 'event_message',
5 argument_position => 1);
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> --
SQL> -- creating job
SQL> --
SQL> begin
2 dbms_scheduler.create_job (
3 job_name => 'FW.FW_JOB',
4 program_name => 'FW.FW_PROG',
5 event_condition => null,
6 queue_spec => 'FW_FILE_WATCHER',
7 auto_drop => false,
8 enabled => false);
9 end;
10 /
PL/SQL procedure successfully completed.
SQL> --
SQL> -- setting parallel instances
SQL> --
SQL> begin
2 dbms_scheduler.set_attribute ('FW.FW_JOB','PARALLEL_INSTANCES', true);
3 end;
4 /
PL/SQL procedure successfully completed.
SQL> --
SQL> -- enable program, job and file watcher
SQL> --
SQL> begin
2 dbms_scheduler.enable ('FW.FW_PROG, FW.FW_JOB, FW_FILE_WATCHER');
3 end;
4 /
PL/SQL procedure successfully completed.
SQL> -- create in 'c:\xxx' folder
SQL> select to_char(sysdate, 'dd-mm-yyyy hh:mi:ss') as "current time" from dual;
current time
-------------------
06-03-2014 01:27:54
SQL> select * from fw_monitoring;
no rows selected
SQL> -- wait for at least 1 minute
SQL> select to_char(sysdate, 'dd-mm-yyyy hh:mi:ss') as "current time" from dual;
current time
-------------------
06-03-2014 01:29:00
SQL> select * from fw_monitoring;
FILE_TIMESTAMP DIRECTORY_PATH FILE_SIZE
------------------------------------------------------------ ------------------------------ ----------
06-MAR-14 01.27.32.376000 PM +00:00 C:\xxx/file.txt 0
END