alter sequence S_BATCH increment by -20 nocache;
select S_BATCH.nextval from dual;
alter sequence S_BATCH increment by 1 nocache;
declare
LastValue integer;
begin
loop
select S_BATCH.currval into LastValue from dual;
exit when LastValue =0;
select S_BATCH.nextval into LastValue from dual;
end loop;
end;
/
alter sequence S_BATCH increment by 1 cache 20;
实际应用中 用以下代码比较方便，上面的是Oracle里直接取的
---系统流水号
select S_SERIALNO.nextval INTO LastValue from dual;
select S_SERIALNO.currval into LastValue from dual;
LastValue := -LastValue;
EXECUTE IMMEDIATE ' alter sequence S_SERIALNO increment by ' || LastValue ||
' nocache';
select S_SERIALNO.nextval INTO LastValue from dual;
EXECUTE IMMEDIATE 'alter sequence S_SERIALNO increment by 1 nocache';
COMMIT;
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