ABAP Select data from SAP table KOMPBWB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KOMPBWB table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to KOMPBWB. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the KOMPBWB table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_KOMPBWB TYPE STANDARD TABLE OF KOMPBWB,
      WA_KOMPBWB TYPE KOMPBWB,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <KOMPBWB> TYPE KOMPBWB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KOMPBWB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KOMPBWB
  INTO TABLE IT_KOMPBWB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMPBWB
*  INTO TABLE @DATA(IT_KOMPBWB2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_KOMPBWB INDEX 1 INTO DATA(WA_KOMPBWB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KOMPBWB ASSIGNING <KOMPBWB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMPBWB>-WERKS = 1.
<KOMPBWB>-VLFKZ = 1.
<KOMPBWB>-VLFKZA = 1.
<KOMPBWB>-VKORG = 1.
<KOMPBWB>-VTWEG = 1.

ENDLOOP.

LOOP AT IT_KOMPBWB INTO WA_KOMPBWB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMPBWB-ABFDT, sy-vline,
  WA_KOMPBWB-ABAST, sy-vline,
  WA_KOMPBWB-MANDT, sy-vline,
  WA_KOMPBWB-AAVIT, sy-vline,
  WA_KOMPBWB-KNARIFI, sy-vline,
  WA_KOMPBWB-AMITB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMPBWB you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_KOMPBWB TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_KOMPBWB INTO WA_KOMPBWB.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPBWB-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPBWB-KUNNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KOMPBWB_STR, 
WERKS TYPE STRING,
VLFKZ TYPE STRING,
VLFKZA TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
ABFDT TYPE STRING,
ABAST TYPE STRING,
MANDT TYPE STRING,
AAVIT TYPE STRING,
KNARIFI TYPE STRING,
AMITB TYPE STRING,
ARMEL TYPE STRING,
BM_MIT_WM TYPE STRING,
BM_FUELLEN_AUTO TYPE STRING,
AMITV TYPE STRING,
AANZM TYPE STRING,
BANZM TYPE STRING,
DATKT TYPE STRING,
DATPT TYPE STRING,
DATLW TYPE STRING,
DATWM TYPE STRING,
DATEK TYPE STRING,
DATVK TYPE STRING,
DATNP TYPE STRING,
AAMEB TYPE STRING,
AAMEV TYPE STRING,
KUNNR TYPE STRING,
ETI01 TYPE STRING,
APSTP TYPE STRING,
BEKAN TYPE STRING,
MAHNG TYPE STRING,
BESTG TYPE STRING,
AENDG TYPE STRING,
BEDEX TYPE STRING,
RUDAX TYPE STRING,
AENDX TYPE STRING,
BESTX TYPE STRING,
AUGEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMPBWB_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_KOMPBWB_STR-WERKS sy-vline 
WA_KOMPBWB_STR-VLFKZ sy-vline 
WA_KOMPBWB_STR-VLFKZA sy-vline 
WA_KOMPBWB_STR-VKORG sy-vline 
WA_KOMPBWB_STR-VTWEG sy-vline 
WA_KOMPBWB_STR-ABFDT sy-vline 
WA_KOMPBWB_STR-ABAST sy-vline 
WA_KOMPBWB_STR-MANDT sy-vline 
WA_KOMPBWB_STR-AAVIT sy-vline 
WA_KOMPBWB_STR-KNARIFI sy-vline 
WA_KOMPBWB_STR-AMITB sy-vline 
WA_KOMPBWB_STR-ARMEL sy-vline 
WA_KOMPBWB_STR-BM_MIT_WM sy-vline 
WA_KOMPBWB_STR-BM_FUELLEN_AUTO sy-vline 
WA_KOMPBWB_STR-AMITV sy-vline 
WA_KOMPBWB_STR-AANZM sy-vline 
WA_KOMPBWB_STR-BANZM sy-vline 
WA_KOMPBWB_STR-DATKT sy-vline 
WA_KOMPBWB_STR-DATPT sy-vline 
WA_KOMPBWB_STR-DATLW sy-vline 
WA_KOMPBWB_STR-DATWM sy-vline 
WA_KOMPBWB_STR-DATEK sy-vline 
WA_KOMPBWB_STR-DATVK sy-vline 
WA_KOMPBWB_STR-DATNP sy-vline 
WA_KOMPBWB_STR-AAMEB sy-vline 
WA_KOMPBWB_STR-AAMEV sy-vline 
WA_KOMPBWB_STR-KUNNR sy-vline 
WA_KOMPBWB_STR-ETI01 sy-vline 
WA_KOMPBWB_STR-APSTP sy-vline 
WA_KOMPBWB_STR-BEKAN sy-vline 
WA_KOMPBWB_STR-MAHNG sy-vline 
WA_KOMPBWB_STR-BESTG sy-vline 
WA_KOMPBWB_STR-AENDG sy-vline 
WA_KOMPBWB_STR-BEDEX sy-vline 
WA_KOMPBWB_STR-RUDAX sy-vline 
WA_KOMPBWB_STR-AENDX sy-vline 
WA_KOMPBWB_STR-BESTX sy-vline 
WA_KOMPBWB_STR-AUGEN sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.