Query Enhancement

Question

Hello everyone,
I am trying to fetch data from LIKP and LIPS using INNER JOIN. The following are my selection criteria :
1. Shipping point/receiving point - LIKP-VSTEL (Mandatory)
2. Delivery Date - LIKP-LFDAT (Mandatory)
3. Receiving plant for deliveries - LIKP-KUNNR (Optional)
4. Ship-to party - LIKP-KUNNR (Optional)
5. Delivery Doc. No. - LIKP-VBELN (Optional)
The query I have written is as below :
SELECT PVBELN PVSTEL PLFDAT PKUNNR PLIFNR PBLDAT
        P~WADAT_IST
        FVGBEL FPOSNR FMATNR FLGORT FCHARG FLFIMG
        FMEINS FVRKME FBRGEW FGEWEI FLGMNG FARKTX
        FSPART FWERKS F~LFIMG
           FROM LIKP AS P
           INNER JOIN LIPS AS F
             ON  PVBELN EQ FVBELN
             AND PERNAM EQ FERNAM
           INTO CORRESPONDING FIELDS OF TABLE I_LIKP_LIPS
           WHERE P~LFDAT IN S_DATE
           AND P~VSTEL EQ S_VSTEL
           AND P~VBELN IN S_DOCNO
           AND P~KUNNR IN S_RWERKS
           AND P~KUNNR IN S_CUSTNO
           AND P~WADAT_IST EQ GIDATE
           AND F~LFIMG NE 0.
Now the above query is taking a lot of time because the user does not feeds the primary key data i.e. VBELN as it is not suppose to be mandatory as per our requirement. There is also a secondary index on LFDAT but still the data access is slow.
Can anybody suggest me how to enhance this query performance.
THANX IN ADVANCE.......

Answer 1

HI,
First of all I suggest you to use for all entries..
Say your VBELN is not mandatory, It does not mean you neeed not use this,,
This selection criteria is for the user..
If he need only particular VBELN he gives the Vblen numbers,..
else if he leaves blank then all the VBLEN from database will be as output..
First check whether you are fetching data from LIKP in sequence..
see the LIKP table for seqeunce..
Then use for all entries for LIPS..
Eg:
select VBELN VSTEL ..... (this field should be in sequence as in LIKP table)
into it_likp (define all your fields in it_likp table which you are fetching from LIKP)
from LIKP
where vbeln = s_vbeln and VSTEL = s_VSTEL...
Now
SELECT VBLEN POSNR WGBEL...
into table it_LIPS (define your LIPS fileds in this table)
from lips
for all entries in it_LIKP
where vbeln = it_likp-vbeln.
This will increase your performance
rewards if useful..
regards,
nazeer