iot表和heap表排序规则不同

SQL> select * from (select * from t1 order by id ) where rownum<20;

ID	   A1	      A2	 A3
---------- ---------- ---------- ----------
1	   1	      1 	 a1
10	   10	      10	 a10
100	   100	      100	 a100
1000	   1000       1000	 a1000
10000	   10000      10000	 a10000
1001	   1001       1001	 a1001
1002	   1002       1002	 a1002
1003	   1003       1003	 a1003
1004	   1004       1004	 a1004
1005	   1005       1005	 a1005
1006	   1006       1006	 a1006

ID	   A1	      A2	 A3
---------- ---------- ---------- ----------
1007	   1007       1007	 a1007
1008	   1008       1008	 a1008
1009	   1009       1009	 a1009
101	   101	      101	 a101
1010	   1010       1010	 a1010
1011	   1011       1011	 a1011
1012	   1012       1012	 a1012
1013	   1013       1013	 a1013

SQL> select * from (select * from t2 order by id ) where rownum<20;

	ID A1	      A2	 A3
---------- ---------- ---------- ----------
	 1 1	      1 	 a1
	 2 2	      2 	 a2
	 3 3	      3 	 a3
	 4 4	      4 	 a4
	 5 5	      5 	 a5
	 6 6	      6 	 a6
	 7 7	      7 	 a7
	 8 8	      8 	 a8
	 9 9	      9 	 a9
	10 10	      10	 a10
	11 11	      11	 a11

	ID A1	      A2	 A3
---------- ---------- ---------- ----------
	12 12	      12	 a12
	13 13	      13	 a13
	14 14	      14	 a14
	15 15	      15	 a15
	16 16	      16	 a16
	17 17	      17	 a17
	18 18	      18	 a18
	19 19	      19	 a19

已选择19行。

SQL>  select dbms_metadata.get_ddl('TABLE','T1') from dual;

DBMS_METADATA.GET_DDL('TABLE','T1')
--------------------------------------------------------------------------------

  CREATE TABLE "TEST"."T1"
   (	"ID" CHAR(10),
	"A1" CHAR(10),
	"A2" CHAR(10),
	"A3" CHAR(10),
	 PRIMARY KEY ("ID")
  USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE S

SQL>
 select dbms_metadata.get_ddl('TABLE','T2') from dual;SQL> 

DBMS_METADATA.GET_DDL('TABLE','T2')
--------------------------------------------------------------------------------

  CREATE TABLE "TEST"."T2"
   (	"ID" NUMBER(*,0),
	"A1" CHAR(10),
	"A2" CHAR(10),
	"A3" CHAR(10),
	 PRIMARY KEY ("ID") ENABLE
   ) ORGANIZATION INDEX NOCOMPRESS PCTFREE 10 IN