Issue in select query

Question

HI All experts,<br><br>
i have  a program in which i have a select query <pre>
SELECT  b~vertrag
          a~anlage
          a~operand
          a~saison
          a~ab
          a~ablfdnr
          a~bis
          a~wert1
  FROM ettifn AS a INNER JOIN ever AS b
  ON aanlage = banlage
  INTO TABLE li_captran PACKAGE SIZE p_pack
  WHERE a~anlage IN s_anlage
    AND a~ab <= l_date
    AND a~bis >= l_date
    AND a~operand IN ('ID-CAPLOAD','ID-OBLT')
    AND b~einzdat <= l_date
    AND b~auszdat >= l_date.</pre><br><br>
this query is taking a lot of time in running and we are facing lot of performance related issues
<br><br>
kindly guide me how i can break this into som simpler query
<br><br>
ettifn has 10 million records
ever has around 5 million records .
<br><br>
also please tell me how much data i can store into an internal table
can i store 5 million records in an internal table ??????
is it good in terms of performance of a program if not please tell me what is the better way of doing dat .
<br><br>
also tell me how secondry indexes help in improving performance of select query
is it good to maintain number of secondry indexes in a standard table or it decreases performance of a standard table .
<br><br>
<pre>
  TYPES: BEGIN OF ty_eanlh,
          anlage LIKE eanlh-anlage,
          bis LIKE eanlh-bis,
          tariftyp LIKE eanlh-tariftyp,
         END OF ty_eanlh.
  DATA: l_date TYPE datum.
  DATA: li_eanlh TYPE HASHED TABLE OF ty_eanlh WITH UNIQUE KEY anlage
                                                               bis
                                               WITH HEADER LINE.
  DATA: li_captran TYPE HASHED TABLE OF ty_captran WITH UNIQUE KEY vertrag
                                                                   anlage
                                                                   operand
                                                                   saison
                                                                   ab
                                                                   ablfdnr
                                                    WITH HEADER LINE.
  DATA: l_tariftyp LIKE eanlh-tariftyp.
l_date = p_date + 6.
  l_date = p_date + 5.          "As per Terry's Request 1/23/2009
  CHECK NOT p_cap IS INITIAL.
Get Operand Values
  SELECT  b~vertrag
          a~anlage
          a~operand
          a~saison
          a~ab
          a~ablfdnr
          a~bis
          a~wert1
  FROM ettifn AS a INNER JOIN ever AS b
  ON aanlage = banlage
  INTO TABLE li_captran PACKAGE SIZE p_pack
  WHERE a~anlage IN s_anlage
    AND a~ab <= l_date
    AND a~bis >= l_date
    AND a~operand IN ('ID-CAPLOAD','ID-OBLT')
    AND b~einzdat <= l_date
    AND b~auszdat >= l_date.
    IF sy-subrc EQ 0 AND NOT li_captran[] IS INITIAL.
   Get Rate Category
      SELECT anlage
             bis
             tariftyp
      FROM eanlh INTO CORRESPONDING FIELDS OF TABLE li_eanlh
      FOR ALL ENTRIES IN li_captran
      WHERE anlage = li_captran-anlage
        AND ab <= l_date
        AND bis >= l_date.
   Get POD ID
      SELECT a~anlage
             a~int_ui
             a~dateto
             a~timeto
             b~ext_ui
      INTO TABLE i_pod
      FROM euiinstln AS a INNER JOIN euitrans AS b
      ON aint_ui = bint_ui
      FOR ALL ENTRIES IN li_captran
      WHERE a~anlage = li_captran-anlage.
      IF sy-subrc EQ 0 AND NOT i_pod[] IS INITIAL.
        SORT i_pod BY anlage.
        SELECT vertrag
               int_ui
               serviceid
        FROM eservice
        INTO TABLE i_servicect
        FOR ALL ENTRIES IN i_pod
        WHERE int_ui = i_pod-int_ui
          AND service_start <= l_date
          AND service_end >= l_date
          AND service = 'ESUP'.
      ENDIF.
      LOOP AT li_captran.
        i_ct-anlage = li_captran-anlage.
        READ TABLE li_eanlh WITH KEY anlage = li_captran-anlage.
        IF sy-subrc EQ 0.
          i_ct-tariftyp = li_eanlh-tariftyp.
          READ TABLE i_rate WITH KEY tariftyp = i_ct-tariftyp.
          IF sy-subrc NE 0.
            CONTINUE.
          ENDIF.
        ELSE.
          i_ct-tariftyp = '0000'.
        ENDIF.
        READ TABLE i_pod WITH KEY anlage = li_captran-anlage.
        IF sy-subrc EQ 0.
          READ TABLE i_servicect WITH KEY int_ui = i_pod-int_ui.
          IF sy-subrc EQ 0.
            i_ct-serviceid = i_servicect-serviceid.
          ENDIF.
        ENDIF.
        IF li_captran-operand = 'ID-CAPLOAD'.
          i_ct-cap = li_captran-wert1.
        ELSEIF li_captran-operand = 'ID-OBLT'.
          i_ct-tran = li_captran-wert1.
        ENDIF.
        COLLECT i_ct.
        CLEAR: li_captran, i_ct.
      ENDLOOP.
    ENDIF.
  ENDSELECT.</pre><br><br>
  this code is taking a lot of time to execute and decreasing the system performance .<br><br>
please guide me how can i increase the performance of this code .<br><br>
Thanks in advance<br><br><br><br>
Edited by: Matt on Oct 11, 2009 9:45 PM

Answer 1

Hi matt ,
no i am not thru bcoz of formatting i just trying to remove it and i just marked it answered so that it will not come in my unanswered because unanswered questions are limited.
also could you please help me in this question .
now how can i change this question to unanswerd .
plz guide me
Thanks in advance