作者:mobiledu2502876027 | 来源:互联网 | 2014-07-08 01:11
每天凌晨清空sequence,让sequence每天从1开始job:www.2cto.comSql代码beginsys.dbms_job.submit(job>:job,what>'clearseq(''SEQ_SN_ID'')
每天凌晨清空sequence,让sequence每天从1开始
job: www.2cto.com
Sql代码
begin
sys.dbms_job.submit(job => :job,
what => 'clearseq(''SEQ_SN_ID'');',
next_date => to_date('16-10-2012 18:37:20', 'dd-mm-yyyy hh24:mi:ss'),
interval => 'trunc(SYSDATE)+1/24+1');
commit;
end;
/
存储过程删除sequence,然后新建sequence,
但要注意,此方法对存储过程掉sequence不能使用,因为删掉一个sequence后再新建后,存储过程要重新编译下才能
使用。
此方法仅给java取sequence使用
Sql代码
create or replace procedure ClearSeq(seqName in varchar) as
n_count number(8);
v_sql varchar(500);
v_code NUMBER;
v_errm VARCHAR2(64);
--mahongmin
begin
select count(1)
into n_count
from user_sequences t
--where t.sequence_name = 'SEQ_SN_ID';
where t.sequence_name = seqName;
if n_count > 0 then
execute immediate 'drop sequence ' || seqName;
end if;
v_sql := 'create sequence ' || seqName ||
' minvalue 1 maxvalue 99999999 start with 1 increment by 1 NOCYCLE cache 20';
execute immediate v_sql;
exception
when others then
v_code := SQLCODE;
v_errm := SUBSTR(SQLERRM, 1, 64);
DBMS_OUTPUT.PUT_LINE('重置sequence时, Error code ' || v_code || ': ' ||
v_errm);
end;