Select performance help

Question

Hi experts.
I have to change a zprogram, specific select.
I tried to change the basic things and i did not get the best performance yet. When the hs_iphas have data (2 to 6 lines only), get time out.
So, now i will try to change the filters order. See my code:
Code before
  SELECT        *
        FROM   viaufks
        WHERE  aufnr  IN hs_aufnr
          AND  objnr  IN hs_objnr
          AND  iphas  IN hs_iphas
          AND  iwerk  IN s_iwerk
          AND  priok  IN s_priok
          AND  ilart  IN s_ilart
          AND  ingpr  IN s_ingpr
          AND  ernam  IN s_aernam
          AND  erdat  IN s_aerdat
          AND  aenam  IN s_aaenam
          AND  aedat  IN s_aaedat
          AND  pspel  IN hs_pspel
          AND  swerk  IN s_swerk
          AND  bukrs  IN s_bukrs
          AND  beber  IN s_beber
          AND  vkorg  IN s_vkorg
          AND  vtweg  IN s_vtweg
          AND  spart  IN s_spart
          AND  tplnr  IN s_tplnr
              AND  gewrk  IN hs_gewrk
routines.. appends and others
ENDSELECT
*after change
    SELECT
aedat  aenam  aufnr  aufpl  beber  bukrs  equnr
erdat  ernam  gewrk  gltrp  gluzp  gstrp  gsuzp
ilart  ingpr  iphas  iwerk  kostl  ktext  kunum
objnr  priok  sermat spart  swerk  tplnr  vkorg
vtweg  serialnr
INTO CORRESPONDING FIELDS OF TABLE ti_viaufks
         FROM   viaufks
         WHERE  aufnr  IN hs_aufnr
           AND  objnr  IN hs_objnr
           AND  iphas  IN hs_iphas
           AND  iwerk  IN s_iwerk
           AND  priok  IN s_priok
           AND  ilart  IN s_ilart
           AND  ingpr  IN s_ingpr
           AND  ernam  IN s_aernam
           AND  erdat  IN s_aerdat
           AND  aenam  IN s_aaenam
           AND  aedat  IN s_aaedat
           AND  pspel  IN hs_pspel
           AND  swerk  IN s_swerk
           AND  bukrs  IN s_bukrs
           AND  beber  IN s_beber
           AND  vkorg  IN s_vkorg
           AND  vtweg  IN s_vtweg
           AND  spart  IN s_spart
           AND  tplnr  IN s_tplnr
           AND  gewrk  IN hs_gewrk
LOOP AT ...
routines appends and others
ENDLOOP.
Thanks in advance!

Answer 1

Sorry about that Siegfried, but when i saw the info in links, i thought it can be a good ideal to put this precious links in the thread.
When i started the thread, i thought the time out problem was in select, but it is in loop.. endloop too.
The loop code with changes:
    LOOP AT ti_viaufks ASSIGNING <fs_viaufks> WHERE objnr IN hs_objnr.
     CHECK ti_viaufks-objnr IN hs_objnr.
Describe date selection in detail
   Why is the 'between' statement not used
      IF NOT p_gstrp IS INITIAL.
        CHECK <fs_viaufks>-gstrp GE p_gstrp OR
              <fs_viaufks>-gltrp GE p_gstrp.
      ENDIF.
      IF NOT p_gltrp IS INITIAL.
        CHECK <fs_viaufks>-gstrp LE p_gltrp OR
              <fs_viaufks>-gltrp LE p_gltrp.
      ENDIF.
Data fits first selection 
      MOVE-CORRESPONDING <fs_viaufks> TO hviaufks.
      APPEND hviaufks.
Memorize TPLNR and EQUNR used in reference objects 
      IF NOT <fs_viaufks>-tplnr IS INITIAL.
        hs_tplnr-low = <fs_viaufks>-tplnr.
        APPEND hs_tplnr.
      ENDIF.
      IF NOT <fs_viaufks>-equnr IS INITIAL.
        hs_equnr-low = <fs_viaufks>-equnr.
        APPEND hs_equnr.
      ENDIF.
    ENDLOOP.
And i still working..
Thanks!