Slow Select Query - Where clause contains Seconday index field +other flds

Question

Hi friends,
The below query is taking about an Hour to execute in production server when there are about 6 Million records in PLAF table. I have verified the trace in ST05 and the correct secondary index (Material Matnr + Plant Plwrk) is being selected.
SELECT plnum
             matnr
             plwrk
             pedtr
             dispo
             rsnum  FROM  plaf
            INTO TABLE it_orders
            WHERE ( ( matnr  IN r_mat1 )  OR
                             matnr IN r_mat2  AND dispo IN s_mrp1 ) AND
             pedtr IN s_date AND   
             obart = '1'.
Will it be a good idea to have only MATNR (secondary index field) in the where condition of the select query and delete the internal table entries for the other where conditions ?
Edited by: Shruthi Seth on Feb 1, 2009 10:10 AM

Answer 1

Hello.
Creating a range r_mat = r_mat1 + r_mat2, I would do something like:
READ TABLE s_mrp1 TRANSPORTING NO FIELDS INDEX 1.
IF sy-subrc EQ 0.
  SELECT plnum matnr plwrk pedtr dispo rsnum
    FROM plaf
    INTO wa_orders
   WHERE matnr IN r_mat
     AND pedtr IN s_date
     AND obart = '1'.
    IF wa_orders-matnr IN r_mat2.
      CHECK wa_orders-dispo IN s_mrp1.
    ENDIF.
    APPEND wa_orders TO it_orders.
  ENDSELECT.
ELSE.
  SELECT plnum matnr plwrk pedtr dispo rsnum
    FROM plaf
    INTO TABLE it_orders
   WHERE matnr IN r_mat1
     AND pedtr IN s_date
     AND obart = '1'.
ENDIF.
Regards,
Valter Oliveira.