Same Execution plan But different consistent read values

Question

hi,
my db version 10.2.0.3
os version solaris 10.
i have a query which has same execution plan but with diffrenet consistent read values when optimizer_mode is RULE and CHOOSE.
what may be the cause of that?
thanks,
Here is the query:
SELECT *
FROM XXX
WHERE id = 4567
RULE based:
| Id | Operation | Name |
| 0 | SELECT STATEMENT | |
| 1 | TABLE ACCESS BY INDEX ROWID| XXX|
| 2 | INDEX RANGE SCAN | XXX_INX_ID |
Note
- 'PLAN_TABLE' is old version
- rule based optimizer used (consider using cbo)
Statistics
1 recursive calls
0 db block gets
5 consistent gets
0 physical reads
0 redo size
1973 bytes sent via SQL*Net to client
492 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
COST Based:
| Id | Operation | Name | Rows | Bytes | Co
st (%CPU)|
| 0 | SELECT STATEMENT | | 1 | 107 |
4 (0)|
| 1 | TABLE ACCESS BY INDEX ROWID| APPOINTMENT | 1 | 107 |
4 (0)|
| 2 | INDEX RANGE SCAN | APPO_INX_MASTERAPPOID | 1 | |
3 (0)|
Note
- 'PLAN_TABLE' is old version
Statistics
0 recursive calls
0 db block gets
48120 consistent gets
0 physical reads
0 redo size
1973 bytes sent via SQL*Net to client
492 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed

Answer 1

873792 wrote:
hi,
my db version 10.2.0.3
RULE based:
The Rule Based Optimizer is NOT supported for V10+