Is there any way to tune this query? EXPLAIN PLAN included

Question

DB version:10gR2
The below query was taking more than 3 seconds. The statistics are up to date for these tables. Is there any other way i could tune this query?
SELECT COUNT(1)
FROM
INVN_SCOPE_DTL, ship_dtl WHERE ship_dtl.WHSE = INVN_SCOPE_DTL.WHSE (+)
AND 'QC' = INVN_SCOPE_DTL.FROM_WORK_GRP (+)
AND  'MQN' = INVN_SCOPE_DTL.FROM_WORK_AREA (+)
AND  ship_dtl.START_CURR_WORK_GRP = INVN_SCOPE_DTL.TO_WORK_GRP (+)
AND  ship_dtl.START_CURR_WORK_AREA = INVN_SCOPE_DTL.TO_WORK_AREA (+)
AND  ship_dtl.WHSE = '930' AND  ship_dtl.OWNER_USER_ID = 'CTZDM'
OR ship_dtl.OWNER_USER_ID = '*'
AND ship_dtl.STAT_CODE >= '10'
AND ship_dtl.STAT_CODE <= '20'
ORDER BY ship_dtl.OWNER_USER_ID DESC,
ship_dtl.CURR_TASK_PRTY ASC, INVN_SCOPE_DTL.DISTANCE ASC, ship_dtl.RLS_DATE_TIME ASC, ship_dtl.TASK_ID ASC;
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
| Id  | Operation                      |  Name               | Rows  | Bytes | Cost (%CPU)|
|   0 | SELECT STATEMENT               |                     |     1 |    86 |    86   (2)|
|   1 |  SORT AGGREGATE                |                     |     1 |    86 |            |
|   2 |   NESTED LOOPS OUTER           |                     |   898 | 77228 |    86   (2)|
|   3 |    INLIST ITERATOR             |                     |       |       |            |
|*  4 |     TABLE ACCESS BY INDEX ROWID| ship_dtl            |   898 | 31430 |    85   (2)|
|*  5 |      INDEX RANGE SCAN          | ship_dtl_IND_4      |  2876 |       |     1   (0)|
|   6 |    TABLE ACCESS BY INDEX ROWID | INVN_SCOPE_DTL     |     1 |    51 |     2  (50)|
PLAN_TABLE_OUTPUT
|*  7 |     INDEX UNIQUE SCAN          | PK_INVN_SCOPE_DTL  |     1 |       |            |
Predicate Information (identified by operation id):
   4 - filter("ship_dtl"."WHSE"='930' AND "ship_dtl"."STAT_CODE">=10 AND
              "ship_dtl"."STAT_CODE"<=20)
   5 - access("ship_dtl"."OWNER_USER_ID"='*' OR "ship_dtl"."OWNER_USER_ID"='CTZDM')
   7 - access("INVN_SCOPE_DTL"."WHSE"(+)='930' AND
              "INVN_SCOPE_DTL"."FROM_WORK_GRP"(+)='QC' AND "INVN_SCOPE_DTL"."FROM_WORK_AREA"(+)='MQN'
PLAN_TABLE_OUTPUT
              AND "ship_dtl"."START_CURR_WORK_GRP"="INVN_SCOPE_DTL"."TO_WORK_GRP"(+) AND
              "ship_dtl"."START_CURR_WORK_AREA"="INVN_SCOPE_DTL"."TO_WORK_AREA"(+))
       filter("ship_dtl"."WHSE"="INVN_SCOPE_DTL"."WHSE"(+))
25 rows selected.

Answer 1

William Robertson wrote:
I notice an OR predicate in the middle of some AND predicates without explicit bracketing. Are you sure it does what you think it does?I underline this point.
A conjuction (AND expression) has a higher priority and will be executed (logically) before the disjunction (OR expression)! So your select looks like this
SELECT COUNT(1)
FROM INVN_SCOPE_DTL, ship_dtl
WHERE
      ( ship_dtl.WHSE = INVN_SCOPE_DTL.WHSE (+)
      AND 'QC' = INVN_SCOPE_DTL.FROM_WORK_GRP (+)
      AND  'MQN' = INVN_SCOPE_DTL.FROM_WORK_AREA (+)
      AND  ship_dtl.START_CURR_WORK_GRP = INVN_SCOPE_DTL.TO_WORK_GRP (+)
      AND  ship_dtl.START_CURR_WORK_AREA = INVN_SCOPE_DTL.TO_WORK_AREA (+)
      AND  ship_dtl.WHSE = '930'
      AND  ship_dtl.OWNER_USER_ID = 'CTZDM'
OR   ( ship_dtl.OWNER_USER_ID = '*'
      AND ship_dtl.STAT_CODE >= '10'
      AND ship_dtl.STAT_CODE <= '20'
;This might be want you want, but I doubt it very much. Please add parenthesis', to get it working the way it should be.
Edited by: Sven W. on Oct 16, 2008 3:25 PM