Usage of 'for all entries' in Select Statement in sap abap

FORM data_retrieval.

 DATA: ld_color(1) TYPE c.

 DATA: BEGIN OF T_VBAP OCCURS 0,
       VBELN  LIKE VBAP-VBELN,
       MATNR  LIKE VBAP-MATNR,
       POSNR  LIKE VBAP-POSNR,
       END OF T_VBAP.

 DATA: BEGIN OF T_VBFA OCCURS 0,
       VBELV  LIKE VBFA-VBELV,
       VBELN  LIKE VBFA-VBELN,
       VBTYP_N  LIKE VBFA-VBTYP_N,

       END OF T_VBFA.

 DATA: BEGIN OF T_VBAK OCCURS 0,
       VBELN  LIKE VBAK-VBELN,
       IHREZ  LIKE VBAK-IHREZ,
       END OF T_VBAK.

 DATA: BEGIN OF T_KNA1 OCCURS 0,
       KUNNR  LIKE KNA1-KUNNR,
       NAME1  LIKE KNA1-NAME1,
       END OF T_KNA1.

  DATA: BEGIN OF T_MAKT OCCURS 0,
       MATNR  LIKE MAKT-MATNR,
       MAKTX  LIKE MAKT-MAKTX,
       END OF T_MAKT.

 SELECT likp~vbeln likp~lifex likp~bldat likp~wadat likp~wadat_ist likp~kodat likp~lfart
        likp~kunnr likp~vstel lips~posnv lips~lfimg lips~vrkme lips~lgmng lips~meins
        lips~werks lips~lgort lips~charg lips~vbelv lips~posnr lips~matnr
        lips~vbeln LIPS~VGBEL LIPS~VGPOS vbup~kosta vbup~wbsta vbup~posnr vbup~vbeln
*           VBAK~IHREZ VBAK~VBELN VBAP~VBELN
    INTO CORRESPONDING FIELDS OF TABLE  it_itab
   FROM ( likp
          INNER JOIN lips
          ON  lips~vbeln = likp~vbeln
          INNER JOIN vbup
          ON  vbup~posnr = lips~posnr
          and VBUP~VBELN = LIPS~VBELN )
*           left outer join VBAK
*           on  VBAK~VBELN = LIPS~VGBEL
*           inner join VBAP
*           on  VBAP~VBELN = VBAK~VBELN )
        WHERE likp~vbeln IN so_vbeln
          AND likp~lifex IN so_lifex
          AND likp~lfart IN so_lfart
          AND likp~kunnr IN so_kunnr
          AND likp~vstel IN so_vstel
          AND likp~bldat IN so_bldat
          AND likp~wadat_ist IN so_wadat
          AND vbup~kosta IN so_kosta
          AND vbup~wbsta IN so_wbsta
          AND LIPS~LFIMG NE 0.

 SELECT VBELN IHREZ INTO TABLE T_VBAK
 FROM VBAK
 FOR ALL ENTRIES IN  IT_ITAB
 WHERE VBELN = IT_ITAB-VGBEL.
*  APPEND T_VBAK.
*  ENDSELECT.

 SELECT VBELN MATNR POSNR INTO TABLE T_VBAP
 FROM VBAP
 FOR ALL ENTRIES IN  IT_ITAB
 WHERE VBELN = IT_ITAB-VGBEL AND
       MATNR = IT_ITAB-MATNR AND
       POSNR = IT_ITAB-VGPOS.
*  APPEND T_VBAP.
*  ENDSELECT.

 SELECT VBELV VBELN VBTYP_N INTO TABLE T_VBFA
 FROM VBFA
 FOR ALL ENTRIES IN  IT_ITAB
 WHERE VBELV = IT_ITAB-VBELN AND
       VBTYP_N = 'M' .

 SELECT KUNNR NAME1 INTO TABLE T_KNA1
 FROM KNA1
 FOR ALL ENTRIES IN IT_ITAB
 WHERE KUNNR = IT_ITAB-KUNNR.
*  APPEND T_KNA1.
*  ENDSELECT.

 SELECT MATNR MAKTX INTO TABLE T_MAKT
 FROM MAKT
 FOR ALL ENTRIES IN IT_ITAB
 WHERE MATNR = IT_ITAB-MATNR.
*  APPEND T_MAKT.
*  ENDSELECT.


*Populate field with color attributes

 LOOP AT it_itab INTO wa_ITAB.

* Populate color variable with colour properties

* Char 1 = C (This is a color property)

* Char 2 = 3 (Color codes: 1 - 7)

* Char 3 = Intensified on/off ( 1 or 0 )

* Char 4 = Inverse display on/off ( 1 or 0 )

* i.e. wa_ekko-line_color = 'C410'
   REFRESH color.
   colourize 'VBELN' 0. " .
   WA_ITAB-farbe = color[].


   ld_color = ld_color + 1.

* Only 7 colours so need to reset color value

   IF ld_color = 3. "8

     ld_color = 1.

   ENDIF.

   CONCATENATE 'C' ld_color '10' INTO wa_ITAB-line_color.
   WA_ITAB-NAME1 = ''.
   WA_ITAB-MAKTX = ''.
   WA_ITAB-IHREZ = ''.
   WA_ITAB-VBELV = ''.
   READ TABLE T_KNA1 WITH KEY KUNNR = WA_ITAB-KUNNR.
   IF SY-SUBRC = 0.
      WA_ITAB-NAME1 = T_KNA1-NAME1.
   ENDIF.
   READ TABLE T_MAKT WITH KEY MATNR = WA_ITAB-MATNR.
   IF SY-SUBRC = 0.
   WA_ITAB-MAKTX = T_MAKT-MAKTX.
   ENDIF.
   READ TABLE T_VBAK WITH KEY VBELN = WA_ITAB-VGBEL.
   IF SY-SUBRC = 0.
   WA_ITAB-IHREZ = T_VBAK-IHREZ.
   ENDIF.
   READ TABLE T_VBFA WITH KEY VBELV = WA_ITAB-VBELN.
   IF SY-SUBRC = 0.
   WA_ITAB-VBELVA = T_VBFA-VBELN.
   ENDIF.
*    READ TABLE T_VBAP WITH KEY VBELN = WA_ITAB-VGBEL
*                               POSNR = WA_ITAB-VGPOS
*                               MATNR = WA_ITAB-MATNR.
*    IF SY-SUBRC = 0.
*    WA_ITAB-IHREZ = T_VBAK-IHREZ.
*    ENDIF.



* wa_ekko-line_color = 'C410'.

   MODIFY it_itab FROM wa_itab.

 ENDLOOP.

ENDFORM. " data_retrieval