ORACLE分区表自动清理分区

Posted 2022-12-08 wenxuechaozhe

背景介绍

ORACLE按照日期创建分区表，仅保留一年数据，每天清理一年前的分区数据。

实现方式

每次清理均处理一年前全部分区，即时某次调度执行失败，也不会造成垃圾数据堆积。

示例代码

--创建存储过程
create or replace procedure zxjy_ora.del_wen_pt
as
 v_sql1 varchar2(2000);
begin
  FOR cur IN (select PARTITION_NAME from user_tab_partitions where table_name='WEN' AND substr(partition_name,2,8)<=to_char(sysdate-366,'yyyymmdd')) LOOP
      v_sql1:='alter table ZXJY_ORA.WEN drop partition '||cur.pname||' ';
      execute immediate v_sql1;
  END LOOP;
end del_wen_pt;
/

---创建调度
BEGIN
DBMS_SCHEDULER.CREATE_SCHEDULE (
schedule_name     => 'sch_del_wen_pt',
start_date        => SYSDATE,
repeat_interval   => 'FREQ=DAILY; BYHOUR=22;BYMINUTE=30;BYSECOND=0',
comments          => 'EACH ONE DAYS delete A old PARTITION ');
end;
/

--创建作业执行调度
BEGIN 
DBMS_SCHEDULER.CREATE_JOB ( 
job_name => 'JOB_DEL_WEN_PT', 
job_type => 'STORED_PROCEDURE', 
job_action => 'zxjy_ora.del_wen_pt', 
schedule_name => 'sch_del_wen_pt', enabled => true); 
END; 
/