Explain Plan and Execution Plan in 10gR2.

Hi,
Version 10.2.0.1.0.
I have two questions:
1) If the explain plan differs from the execution path in this version, then, is it safe to assume that the statistics are stale (or not gathered at all) on the underlying tables?
2) Can you in any way make a query use RBO instead of CBO? (I know it doesn't make any sense since CBO is lot smarter, but, for purely academic reasons).
Thank you,
Rahul.

The rule based optimizer is most definitely present in 10gR2. It might not be in the documentation, but it is still there.
C:\sql>sqlplus test/test
SQL*Plus: Release 10.2.0.2.0 - Production on Tue Oct 10 15:43:34 2006
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
test@SVTEST> set autotrace traceonly
test@SVTEST> alter session set optimizer_mode=rule;
Session altered.
Elapsed: 00:00:00.01
test@SVTEST> select * from dual;
Elapsed: 00:00:00.03
Execution Plan
Plan hash value: 272002086
| Id | Operation | Name |
| 0 | SELECT STATEMENT | |
| 1 | TABLE ACCESS FULL| DUAL |
Note
- rule based optimizer used (consider using cbo)
Statistics
1 recursive calls
0 db block gets
3 consistent gets
2 physical reads
0 redo size
407 bytes sent via SQL*Net to client
381 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
test@SVTEST>

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So:
<cfset "VARIABLES.#a#" = masterQuery["#a#"]>
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