定期重置数据库序列

Posted 2020-12-30 johnnyc

//建立一个从0开始的序列
drop sequence seq_sss_id;
create sequence seq_sss_id
increment by 1
start with 0
minvalue 0 
maxvalue 999999999;

//重置序列的存储过程

create or replace procedure reset_jis_sequence as
n number(10);
tsql varchar2(100);
begin
execute immediate ‘select seq_sss_id.nextval from dual‘ into n;
n:=-n;
tsql:=‘alter sequence seq_sss_id increment by ‘|| n;
execute immediate tsql;
execute immediate ‘select seq_sss_id.nextval from dual‘ into n;
tsql:=‘alter sequence seq_sss_id increment by 1‘;
execute immediate tsql;
end reset_jis_sequence;

//job定时（每天0：00定时运行reset_jis_sequence 储存过程）
declare
job number;
begin
sys.dbms_job.submit(job => job,
what => ‘reset_jis_sequence;‘,
next_date => to_date(‘21-04-2018‘, ‘dd-mm-yyyy‘),
interval => ‘TRUNC( SYSDATE + 1)‘);
commit;
end;

//查询job的id
select job,what,failures,broken from user_jobs

//根据job的ID执行job
begin
dbms_job.run(jobId);
end;

//根据job的ID删除job
BEGIN

SYS.DBMS_JOB.REMOVE(jobId);

COMMIT;

END;