JOIN optimize PROJ - AFRU

Question

Hi,
Has anybody idea if it is possible to optimize this query?
I suppose that join should be the best, what I can get... but it is still very very slow. I need data from AFRU, AFVC, AFVV per project num (PROJ), so there are thousands of lines in result. Now I am able to get data only per one AUFNR(AFPO) - few minutes, per POSID(PRPS) or PSPID(PROJ) it falls down after 10 minutes.
Is it better to divide so difficult query or use another techniques? Or change order of tables in query?
Thanks for help  in advance.
SELECT projpspid prpsposid afruaufnr afpomatnr maktmaktx afpoaufnr
      afvcvornr afvcltxa1 afvvmgvrg crhdarbpl crtxktext afvvvgw01
      afvvvgw02 afrulmnga afruism01 afruism02 afruersda afruernam
      afrupernr afrurueck afruile01 afvvvge01 afvv~meinh
    INTO CORRESPONDING FIELDS OF TABLE it_zppprodtime
    FROM afru
    INNER JOIN afpo
      ON afruaufnr = afpoaufnr
    INNER JOIN prps
      ON afpoprojn = prpspspnr
    INNER JOIN proj
      ON prpspsphi = projpspnr
    INNER JOIN crhd
      ON crhdobjid = afruarbid
    INNER JOIN afvc
      ON afvcaufpl = afruaufpl
        AND afvcaplzl = afruaplzl
    INNER JOIN afvv
      ON afvvaufpl = afruaufpl
        AND afvvaplzl = afruaplzl
    INNER JOIN makt
      ON maktmatnr = afpomatnr
    INNER JOIN crtx
      ON crtxobjid = crhdobjid
    WHERE
      proj~pspid IN s_pspid
      AND prps~posid IN s_projn
      AND crhd~arbpl IN s_arbpl
      AND afru~aufnr IN s_aufnr
      AND makt~spras = 'CS'
      and crtx~spras = 'CS'.

Answer 1

Hi Martin,
I had a few concerns.
1) In real life it is unlikely that that you will get users to make queries on all the orders. It appears more likely to me that users would enter a project number/s in the selection screen. Given that it makes more sense constructing your query to begin with project number rather than order number. I have taken the liberty of modifying the query to give you an example.
2) I noticed that your query reads table CRHD using field OBJID. The primary key is based on fields OBJTY and OBJID. If you know the OBJTY you can use it in the where clause. This will let you use the primary key. Remember CRHD is a huge table.
3) You can use the OBJID from CRHD table to join table CRTX. (Look at the query below).
SELECT proj~pspid
       prps~posid
       afru~aufnr
       afpo~matnr
       makt~maktx
       afpo~aufnr
       afvc~vornr
       afvc~ltxa1
       afvv~mgvrg
       crhd~arbpl
       crtx~ktext
       afvv~vgw01
       afvv~vgw02
       afru~lmnga
       afru~ism01
       afru~ism02
       afru~ersda
       afru~ernam
       afru~pernr
       afru~rueck
       afru~ile01
       afvv~vge01
       afvv~meinh
INTO CORRESPONDING FIELDS OF TABLE it_zppprodtime
FROM       proj
inner join prps
on  prps~psphi = proj~pspnr
inner join afpo
ON  afpo~projn = prps~pspnr
inner join afru
on  afru~aufnr = afpo~aufnr
INNER JOIN afvc
ON  afvc~aufpl  = afru~aufpl
AND afvc~aplzl = afru~aplzl
INNER JOIN afvv
ON  afvv~aufpl = afru~aufpl
AND afvv~aplzl = afru~aplzl
INNER JOIN makt
ON  makt~matnr = afpo~matnr
INNER JOIN crhd
ON  crhd~objid = afru~arbid
INNER JOIN crtx
ON  crtx~objTY = crhd~objty
AND crtx~objid = crhd~objid
WHERE proj~pspid IN s_pspid
AND   prps~posid IN s_projn
AND   crhd~arbpl IN s_arbpl
AND   afru~aufnr IN s_aufnr
AND   makt~spras = 'CS'
AND   crhd~objty = ????
AND   crtx~spras = 'CS'.