Optimizing a Select Statement

Question

Hi,
I have recently been asked to generate a program that reports of payroll postings to FI.  This involves creating a giant select statement from the ppoix table to gather all the postings.  My select statement is as follows:
  SELECT pernr                       "EE Number
         seqno                       "Sequential number
         actsign                     "Indicator: Status of record
         runid                       "Number of posting run
         postnum                     "Number
         tslin                       "Line number of data transfer
         lgart                       "Wage Type
         betrg                       "Amount
        waers                       "Currency
        anzhl                       "Number
        meins                       "Base unit of measure
         spprc         "Special processing of posting items
        momag         "Transfer to FI/CO:EE grouping for acct determi
        komok         "Transfer to FI/CO: Symbolic account
        mcode                       "Matchcode search term
        koart                       "Account assignment type
        auart                       "Expenditure type
        nofin         "Indicator: Expenditure type is not funded
           INTO CORRESPONDING FIELDS OF TABLE i_ppoix
           FROM ppoix
           FOR ALL ENTRIES IN run_doc_xref
           WHERE runid  = run_doc_xref-runid
             AND tslin  = run_doc_xref-linum
             AND spprc  <> 'A'
             AND lgart IN s_lgart
             AND pernr in s_pernr.
where s_pernr is a select option that holds personnel nummbers and s_lgart is a select option that holds wagetypes.  This statement works fine for a certain amount of personnel numbers and a certain amount of wagetypes, but once you exceed a certain limit the Database does not allow you to perform a select statement this large.  Is there a better way to perform such a large select such as this one) ie: FM, or some other method I am not aware of.  This select statement comes from the standard SAP delivered cost center admin report and this report dumps as well when too much data is passed to it.
any ideas would be much appreciated.
thanks.

Answer 1

The problem here is with the select-options.
For a select statement, you cannot have more that certain amount of data.
The problem with your select becomes complex because of the FOR ALL ENTRIES in and the huge s_pernr and the 40 million records :(.
I am guessing that the s_lgart will be small.
How many entries do you have in internal table "run_doc_xref"?
If there are not that many, then I would suggest this:
TYPES:
  BEGIN OF ty_temp_ppoix,
   pernr   TYPE ppoix-pernr,
   lgart   TYPE ppoix-lgart,
   seqno   TYPE ppoix-seqno,
   actsign TYPE ppoix-actsign,
   runid   TYPE ppoix-runid,
   postnum TYPE ppoix-postnum,
   tslin   TYPE ppoix-tslin,
   betrg   TYPE ppoix-betrg,
   spprc   TYPE ppoix-spprc,
  END OF ty_temp_ppoix.
DATA:
i_temp_ppoix TYPE SORTED TABLE OF ty_temp_ppoix
   WITH NON-UNIQUE KEY pernr lgart
   INITIAL SIZE 0
   WITH HEADER LINE.
DATA:
  v_pernr_lines TYPE sy-tabix,
  v_lgart_lines TYPE sy-tabix.
IF NOT run_doc_xref[] IS INITIAL.
  DESCRIBE TABLE s_pernr LINES v_pernr_lines.
  DESCRIBE TABLE s_lgart LINES v_lgart_lines.
  IF v_pernr_lines GT 800 OR
     v_lgart_lines GT 800.
* There is an index on runid and tslin. This should be ok
* ( still bad because of the huge table :(  )
    SELECT pernr lgart seqno actsign runid postnum tslin betrg spprc
* Selecting into sorted TEMP table here
      INTO TABLE i_temp_ppoix
      FROM ppoix
      FOR ALL ENTRIES IN run_doc_xref
      WHERE runid = run_doc_xref-runid
      AND   tslin = run_doc_xref-linum
      AND   spprc <> 'A'.
* The sorted table should make the delete faster
    DELETE i_temp_ppoix WHERE NOT pernr IN s_pernr
                        AND   NOT lgart IN s_lgart.
* Now populate the actual target
    LOOP AT i_temp_ppoix.
      MOVE: i_temp_ppoix-pernr TO i_ppoix-pernr.
*  and the rest of the fields
      APPEND i_ppoix.
      DELETE i_temp_ppoix.
    ENDLOOP.
  ELSE.
    SELECT pernr seqno actsign runid postnum tslin lgart betrg spprc
* Selecting into your ACTUAL target here
      INTO TABLE i_ppoix
      FROM ppoix
      FOR ALL ENTRIES IN run_doc_xref
      WHERE runid = run_doc_xref-runid
      AND   tslin = run_doc_xref-linum
      AND   spprc <> 'A'
      AND   pernr IN s_pernr
      AND   lgart IN s_lgart.
  ENDIF.
ELSE.
* Error message because of no entries in run_doc_xref?
* Please answer this so a new solution can be implemented here
* if it is NOT an error
ENDIF.
Hope this helps.
Regards,
-Ramesh