开发谓词放错引起的尴尬

explain plan for UPDATE DWF.F_PTY_INDIV O
   SET END_DT = TO_DATE('2012-12-31', 'YYYY-MM-DD')
 WHERE EXISTS (SELECT 1
          FROM DWF.F_PTY_INDIV F
         WHERE O.PTY_ID = PTY_ID
           AND O.CORP_ORG = CORP_ORG
           AND O.SOURCE_CODE = 'CMS'
           AND SOURCE_CODE = 'CMS'
           AND F.DW_DATA_DT = TO_DATE('2012-12-31', 'YYYY-MM-DD'))
   AND O.DW_DATA_DT <> TO_DATE('2012-12-31', 'YYYY-MM-DD')
   AND O.END_DT = TO_DATE('29991231', 'YYYY-MM-DD');
           
           
           select * from table(dbms_xplan.display());
Plan hash value: 4112899302
 
-----------------------------------------------------------------------------------------------
| Id  | Operation                      | Name         | Rows  | Bytes | Cost (%CPU)| Time     |
-----------------------------------------------------------------------------------------------
|   0 | UPDATE STATEMENT               |              |     1 |    44 |   373K  (1)| 01:14:48 |
|   1 |  UPDATE                        | F_PTY_INDIV  |       |       |            |          |
|*  2 |   FILTER                       |              |       |       |            |          |
|*  3 |    TABLE ACCESS FULL           | F_PTY_INDIV  |  1589 | 69916 |  1149   (2)| 00:00:14 |
|*  4 |    FILTER                      |              |       |       |            |          |
|*  5 |     TABLE ACCESS BY INDEX ROWID| F_PTY_INDIV  |     1 |    36 |   469   (0)| 00:00:06 |
|*  6 |      INDEX SKIP SCAN           | SYS_C0022051 |     1 |       |   468   (0)| 00:00:06 |
-----------------------------------------------------------------------------------------------
 
Predicate Information (identified by operation id):
---------------------------------------------------
 
   2 - filter( EXISTS (SELECT 0 FROM "DWF"."F_PTY_INDIV" "F" WHERE :B1='CMS' AND 
              "F"."DW_DATA_DT"=TO_DATE(' 2012-12-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND 
              "PTY_ID"=:B2 AND "CORP_ORG"=:B3 AND "SOURCE_CODE"='CMS'))
   3 - filter("O"."END_DT"=TO_DATE('29991231','YYYY-MM-DD') AND 
              "O"."DW_DATA_DT"<>TO_DATE(' 2012-12-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
   4 - filter(:B1='CMS')
   5 - filter("F"."DW_DATA_DT"=TO_DATE(' 2012-12-31 00:00:00', 'syyyy-mm-dd 
              hh24:mi:ss'))
   6 - access("PTY_ID"=:B1 AND "SOURCE_CODE"='CMS' AND "CORP_ORG"=:B2)
       filter("PTY_ID"=:B1 AND "CORP_ORG"=:B2 AND "SOURCE_CODE"='CMS')
----------------------------------------------------------------------------------------------------------
开发居然把AND O.SOURCE_CODE = 'CMS'放到了子查询里,真是无语

explain plan for UPDATE DWF.F_PTY_INDIV O
   SET END_DT = TO_DATE('2012-12-31', 'YYYY-MM-DD')
 WHERE O.SOURCE_CODE = 'CMS' and 
 EXISTS (SELECT 1
          FROM DWF.F_PTY_INDIV F
         WHERE O.PTY_ID = PTY_ID
           AND O.CORP_ORG = CORP_ORG
          /* AND O.SOURCE_CODE = 'CMS'*/
           AND SOURCE_CODE = 'CMS'
           AND F.DW_DATA_DT = TO_DATE('2012-12-31', 'YYYY-MM-DD'))
   AND O.DW_DATA_DT <> TO_DATE('2012-12-31', 'YYYY-MM-DD')
   AND O.END_DT = TO_DATE('29991231', 'YYYY-MM-DD')
   
   select * from table(dbms_xplan.display());
   Plan hash value: 3463369635
 
-------------------------------------------------------------------------------------
| Id  | Operation             | Name        | Rows  | Bytes | Cost (%CPU)| Time     |
-------------------------------------------------------------------------------------
|   0 | UPDATE STATEMENT      |             |     1 |    80 |  2286   (2)| 00:00:28 |
|   1 |  UPDATE               | F_PTY_INDIV |       |       |            |          |
|*  2 |   HASH JOIN RIGHT SEMI|             |     1 |    80 |  2286   (2)| 00:00:28 |
|*  3 |    TABLE ACCESS FULL  | F_PTY_INDIV |   286 | 10296 |  1141   (2)| 00:00:14 |
|*  4 |    TABLE ACCESS FULL  | F_PTY_INDIV |   740 | 32560 |  1145   (2)| 00:00:14 |
-------------------------------------------------------------------------------------
 
Predicate Information (identified by operation id):
---------------------------------------------------
 
   2 - access("O"."PTY_ID"="PTY_ID" AND "O"."CORP_ORG"="CORP_ORG")
   3 - filter("F"."DW_DATA_DT"=TO_DATE(' 2012-12-31 00:00:00', 'syyyy-mm-dd 
              hh24:mi:ss') AND "SOURCE_CODE"='CMS')
   4 - filter("O"."SOURCE_CODE"='CMS' AND 
              "O"."END_DT"=TO_DATE('29991231','YYYY-MM-DD') AND 
              "O"."DW_DATA_DT"<>TO_DATE(' 2012-12-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))