Reduce execution time with selects

Question

Hi,
I have to reduce the execution time in a report, most of the consumed time is in the select query.
I have a table, gt_result:
DATA: BEGIN OF gwa_result,
      tknum            LIKE vttk-tknum,
      stabf            LIKE vttk-stabf,
      shtyp            LIKE vttk-shtyp,
      route            LIKE vttk-route,
      vsart            LIKE vttk-vsart,
      signi            LIKE vttk-signi,
      dtabf            LIKE vttk-dtabf,
      vbeln            LIKE likp-vbeln,
      /bshm/le_nr_cust LIKE likp-/bshm/le_nr_cust,
      vkorg            LIKE likp-vkorg,
      werks            LIKE likp-werks,
      regio            LIKE kna1-regio,
      land1            LIKE kna1-land1,
      xegld            LIKE t005-xegld,
      intca            LIKE t005-intca,
      bezei            LIKE tvrot-bezei,
      bezei1           LIKE t173t-bezei,
      fecha(10) type c.
DATA: END OF gwa_result.
DATA: gt_result LIKE STANDARD TABLE OF gwa_result.
And the select query is this:
  SELECT ktknum kstabf kshtyp kroute kvsart ksigni
k~dtabf
         lvbeln l/bshm/le_nr_cust lvkorg lwerks   nregio nland1 oxegld ointca
             tbezei   ttbezei
  FROM vttk AS k
  INNER JOIN vttp  AS p ON ktknum = ptknum
  INNER JOIN likp  AS l ON pvbeln = lvbeln
  INNER JOIN kna1  AS n ON lkunnr = nkunnr
  INNER JOIN t005  AS o ON nland1 = oland1
  INNER JOIN tvrot AS t ON troute = kroute AND t~spras = sy-langu
  INNER JOIN t173t AS tt ON ttvsart = kvsart AND tt~spras = sy-langu
  INTO TABLE gt_result
  WHERE ktknum IN s_tknum AND ktplst IN s_tplst AND k~route IN s_route AND
     k~erdat BETWEEN s_erdat-low AND s_erdat-high AND
     l~/bshm/le_nr_cust <> ' '    "IS NOT NULL
     AND k~stabf = 'X'
     AND ktknum NOT IN ( SELECT tktknum  FROM vttk AS tk
                         INNER JOIN vttp AS tp ON tktknum = tptknum
                         INNER JOIN likp AS tl ON tpvbeln = tlvbeln
                         WHERE l~/bshm/le_nr_cust IS NULL )
     AND k~tknum NOT IN ( SELECT tknum FROM /bshs/ssm_eship )
     AND ( o~xegld = ' '
           OR ( o~xegld = 'X' AND
                ( ( n~land1 = 'ES'
                    AND ( nregio = '51' OR nregio = '52'
                          OR nregio =  '35' OR nregio =  '38' ) )
                           OR n~land1 = 'ESC' ) )
                  OR ointca = 'AD' OR ointca = 'GI' ).
Does somebody know how to reduce the execution time ?.
Thanks.

Answer 1

Hi,
Try to remove the join. Use seperate selects as shown in example below and for the sake of selection, keep some key fields in your internal table.
Then once your final table is created, you can copy the table into GT_FINAL which will contain only fields you need.
EX
data : begin of it_likp occurs 0,
         vbeln like likp-vbeln,
         /bshm/le_nr_cust like likp-/bshm/le_nr_cust,
         vkorg like likp-vkorg,
         werks like likp-werks,
         kunnr likr likp-kunnr,
       end of it_likp.
data : begin of it_kna1 occurs 0,
       kunnr like...
       regio....
       land1...
      end  of it_kna1 occurs 0,
Select tknum stabf shtyp route vsart signi dtabf
from VTTP
into table gt_result
WHERE tknum IN s_tknum AND
      tplst IN s_tplst AND
      route IN s_route AND
      erdat BETWEEN s_erdat-low AND s_erdat-high.
select vbeln /bshm/le_nr_cust
       vkorg werks kunnr
       from likp
       into table it_likp
       for all entries in gt_result
       where vbeln = gt_result-vbeln.
select kunnr
       regio
       land1
       from kna1
       into it_kna1
       for all entries in it_likp.
similarly for other tables.
Then loop at gt result and read corresponding table and populate entire record :
loop at gt_result.
read table it_likp where vbeln = gt_result-vbeln.
if sy-subrc eq 0.
  move corresponding fields of it_likp into gt_result.
  gt_result-kunnr = it_likp-kunnr.
  modify gt_result.
endif.
read table it_kna1 where kunnr = gt_result-vbeln.
if sy-subrc eq 0.
  gt_result-regio = it-kna1-regio.
  gt_result-land1 = it-kna1-land1.
  modify gt_result.
endif.
endloop.