drop table oid_tbl;create table oid_tbl (nextval number(15) not null, type   number(10) not null);insert into oid_tbl (nextval, type) values (1, 1);insert into oid_tbl (nextval, type) values (1, 11);insert into oid_tbl (nextval, type) values (1, 12);insert into oid_tbl (nextval, type) values (1, 111);insert into oid_tbl (nextval, type) values (1, 112);insert into oid_tbl (nextval, type) values (1, 121);insert into oid_tbl (nextval, type) values (1, 122);insert into oid_tbl (nextval, type) values (1, 2);insert into oid_tbl (nextval, type) values (1, 21);insert into oid_tbl (nextval, type) values (1, 22);commit;