Replacement for inner join.

Question

I have the following SELECT stmt with inner join which is taking more time to execute......Kindly help me how to improve performance
SELECT AWERKS AMATNR AMBLNR AMJAHR AMENGE ABWART A~SHKZG
                AAUFNR  BBUDAT
               INTO CORRESPONDING FIELDS OF TABLE TRANSTAB
    FROM MSEG AS A INNER JOIN MKPF AS B ON AMBLNR = BMBLNR AND
                                          AMJAHR = BMJAHR
                WHERE A~BUKRS =  BUKRS   AND
                      A~WERKS IN R_WERKS AND
                      A~MATNR IN S_MATNR AND
                      B~BUDAT >= YFDATE  AND
                      B~BUDAT <= P_DATUM AND
                      A~BWART IN (101,102,601,602,641,642).
YOUR HELP IS HIGHLY APPRECIATED....

Answer 1

Goldie - IN may or may not take more time. It depends on selectivity. If the IN is wide open, then the database will not be able to use and index effectively and may have to use a full index scan. I encourage you to run this:
REPORT ztest_indexed_selects.
PARAMETERS: p_bukrs   LIKE bkpf-bukrs,
            p_blart   LIKE bkpf-blart,
            p_budat   LIKE bkpf-budat,
            p_gjahr   LIKE bkpf-gjahr.
DATA: bkpf  TYPE bkpf.
DATA: bkpf_int TYPE TABLE OF bkpf .
DATA: cc      LIKE bkpf-bukrs,
      doc     LIKE bkpf-belnr,
      start   TYPE i,
      end     TYPE i,
      dif     TYPE i.
START-OF-SELECTION.
* Hardcoded values
* Preliminary select.
  REFRESH bkpf_int.
  SELECT  *
    FROM bkpf
    INTO TABLE bkpf_int
    WHERE bukrs EQ p_bukrs
    AND gjahr EQ p_gjahr
    AND bstat IN (' ', 'A', 'B', 'D', 'M', 'S', 'V', 'W', 'Z')
    AND blart = p_blart
    AND budat = p_budat.
  DO 5 TIMES.
    REFRESH bkpf_int.
    GET RUN TIME FIELD start.
    SELECT  *
      FROM bkpf
      INTO TABLE bkpf_int
      WHERE bukrs EQ p_bukrs
      AND gjahr EQ p_gjahr
      AND blart = p_blart
      AND budat = p_budat.
    GET RUN TIME FIELD end.
    dif = end - start.
    WRITE: /001 'Time for SELECT without BSTAT', ':', dif,
                 'microseconds'.
    REFRESH bkpf_int.
    GET RUN TIME FIELD start.
    SELECT  *
      FROM bkpf
      INTO TABLE bkpf_int
      WHERE bukrs EQ p_bukrs
      AND gjahr EQ p_gjahr
      AND bstat IN (' ', 'A', 'B', 'D', 'M', 'S', 'V', 'W', 'Z')
      AND blart = p_blart
      AND budat = p_budat.
    GET RUN TIME FIELD end.
    dif = end - start.
    WRITE: /001 'Time for SELECT with    BSTAT', ':', dif,
                 'microseconds'.
ENDDO.
Rob