Bad Performance in a query into table BKPF

Question

Hi forum i have a really problem in the second query under the table
BKPF.. some body cans help me, please
*THIS IS THE QUERY UNDER MSEG
  SELECT tmsegmblnr tmkpfbudat tmsegbelnr tmsegbukrs tmseg~matnr
         tmsegebelp tmsegdmbtr tmsegwaers tmsegwerks tmseg~lgort
         tmsegmenge tmsegkostl
  FROM mseg AS tmseg JOIN mkpf AS tmkpf ON tmsegmblnr = tmkpfmblnr
  INTO CORRESPONDING FIELDS OF TABLE it_docs
  WHERE
    tmseg~bukrs IN se_bukrs AND
    tmkpf~budat IN se_budat AND
    tmseg~mjahr = d_gjahr AND
    ( tmsegbwart IN se_bwart AND tmsegbwart IN (201,261) ).
  IF sy-dbcnt > 0.
I CREATE AWKEY FOR CONSULTING BKPF
    LOOP AT it_docs.
      CONCATENATE it_docs-mblnr d_gjahr INTO it_docs-d_awkey.
      MODIFY it_docs.
    ENDLOOP.
THIS IS THE QUERY WITH BAD BAD PERFOMANCE
I NEED KNOW "BELNR" FOR GO TO THE BSEG TABLE
    SELECT belnr awkey
    FROM bkpf
    INTO CORRESPONDING FIELDS OF TABLE it_tmp
    FOR ALL ENTRIES IN it_docs
    WHERE
      bukrs = it_docs-bukrs AND
      awkey = it_docs-d_awkey AND
      gjahr = d_gjahr AND
      bstat = space .
THNKS

Answer 1

Hi Josue,
The bad performance is because you're not specifying the primary keys of the table BKPF in your WHERE condition; BKPF usually is a big table.
What you really need is to create a new index on database for table BKPF via the ABAP Dictionary on fields BUKRS, AWKEY, GJAHR & BSTAT. You'll find the performace of the program will significantly increase after the new index is activated. But I would talk to the Basis first to confirm they have no issues if you create a new index for BKPF on the database system.
Hope this helps.
Cheers,
Sougata.