Simple query takes time to run

Question

Hi,
I have a simple query whcih takes about 20 mins to run.. here is the TKPROF forit:
  SELECT
    SY2.QBAC0,
    sum(decode(SALES_ORDER.SDCRCD,'USD', SALES_ORDER.SDAEXP,'CAD', SALES_ORDER.SDAEXP /1.0452))
  FROM
    JDE.F5542SY2  SY2,
    JDE.F42119  SALES_ORDER,
    JDE.F0116  SHIP_TO,
    JDE.F5542SY1  SY1,
   JDE.F4101  PRODUCT_INFO
WHERE
    ( SHIP_TO.ALAN8=SALES_ORDER.SDSHAN  )
    AND  ( SY1.QANRAC=SY2.QBNRAC and SY1.QAOTCD=SY2.QBOTCD  )
    AND  ( PRODUCT_INFO.IMITM=SALES_ORDER.SDITM  )
    AND  ( SY2.QBSHAN=SALES_ORDER.SDSHAN  )
    AND  ( SALES_ORDER.SDLNTY NOT IN ('H ','HC','I ')  )
    AND  ( PRODUCT_INFO.IMSRP1 Not In ('   ','000','689')  )
    AND  ( SALES_ORDER.SDDCTO IN  ('CO','CR','SA','SF','SG','SP','SM','SO','SL','SR')  )
    AND  (
    ( SY1.QACTR=SHIP_TO.ALCTR  )
    AND  ( PRODUCT_INFO.IMSRP1=SY1.QASRP1  )
  GROUP BY
  SY2.QBAC0
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.07       0.07          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch       10     92.40     929.16     798689     838484          0         131
total       12     92.48     929.24     798689     838484          0         131
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 62 
Rows     Row Source Operation
    131  SORT GROUP BY
3535506   HASH JOIN 
4026100    HASH JOIN 
    922     TABLE ACCESS FULL OBJ#(187309)
3454198     HASH JOIN 
  80065      INDEX FAST FULL SCAN OBJ#(30492) (object id 30492)
3489670      HASH JOIN 
  65192       INDEX FAST FULL SCAN OBJ#(30457) (object id 30457)
3489936       PARTITION RANGE ALL PARTITION: 1 9
3489936        TABLE ACCESS FULL OBJ#(30530) PARTITION: 1 9
  97152    TABLE ACCESS FULL OBJ#(187308)
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.07       0.07          0          0          0           0
Execute      2      0.00       0.00          0          0          0           0
Fetch       10     92.40     929.16     798689     838484          0         131
total       13     92.48     929.24     798689     838484          0         131
Misses in library cache during parse: 1kindly suggest how to resolve this...
OS is windows and its 9i DB...
Thanks

Answer 1

> ... you want to get rid of the IN statements.
They prevent Oracle from usering the index.
SQL> create table mytable (id,num,description)
  2  as
  3   select level
  4        , case level
  5          when 0 then 0
  6          when 1 then 1
  7          else 2
  8          end
  9        , 'description ' || to_char(level)
10     from dual
11  connect by level <= 10000
12  /
Table created.
SQL> create index i1 on mytable(num)
  2  /
Index created.
SQL> exec dbms_stats.gather_table_stats(user,'mytable')
PL/SQL procedure successfully completed.
SQL> set autotrace on explain
SQL> select id
  2       , num
  3       , description
  4    from mytable
  5   where num in (0,1)
  6  /
                                    ID                                    NUM DESCRIPTION
                                     1                                      1 description 1
1 row selected.
Execution Plan
Plan hash value: 2172953059
| Id  | Operation                    | Name    | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT             |         |  5001 |   112K|     2   (0)| 00:00:01 |
|   1 |  INLIST ITERATOR             |         |       |       |            |          |
|   2 |   TABLE ACCESS BY INDEX ROWID| MYTABLE |  5001 |   112K|     2   (0)| 00:00:01 |
|*  3 |    INDEX RANGE SCAN | I1      |  5001 |       |     1   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   3 - access("NUM"=0 OR "NUM"=1)Regards,
Rob.