ABAP Select data from SAP table WLF_KOMWBPA_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WLF_KOMWBPA_ITEM 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 WLF_KOMWBPA_ITEM. 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 WLF_KOMWBPA_ITEM 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_WLF_KOMWBPA_ITEM TYPE STANDARD TABLE OF WLF_KOMWBPA_ITEM,
      WA_WLF_KOMWBPA_ITEM TYPE WLF_KOMWBPA_ITEM,
      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: <WLF_KOMWBPA_ITEM> TYPE WLF_KOMWBPA_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLF_KOMWBPA_ITEM
*  INTO TABLE @DATA(IT_WLF_KOMWBPA_ITEM2).
*--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_WLF_KOMWBPA_ITEM INDEX 1 INTO DATA(WA_WLF_KOMWBPA_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLF_KOMWBPA_ITEM>-MANDT = 1.
<WLF_KOMWBPA_ITEM>-WBELN = 1.
<WLF_KOMWBPA_ITEM>-POSNR = 1.
<WLF_KOMWBPA_ITEM>-PARVW = 1.
<WLF_KOMWBPA_ITEM>-PARZA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLF_KOMWBPA_ITEM-ERNAM, sy-vline,
  WA_WLF_KOMWBPA_ITEM-ERDAT, sy-vline,
  WA_WLF_KOMWBPA_ITEM-LIFNR, sy-vline,
  WA_WLF_KOMWBPA_ITEM-KUNNR, sy-vline,
  WA_WLF_KOMWBPA_ITEM-DEFPA, sy-vline,
  WA_WLF_KOMWBPA_ITEM-PARNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLF_KOMWBPA_ITEM 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_WLF_KOMWBPA_ITEM 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_WLF_KOMWBPA_ITEM INTO WA_WLF_KOMWBPA_ITEM.


*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 WBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WLF_KOMWBPA_ITEM-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLF_KOMWBPA_ITEM-WBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_WLF_KOMWBPA_ITEM-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLF_KOMWBPA_ITEM-PARVW.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_WLF_KOMWBPA_ITEM-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLF_KOMWBPA_ITEM-SPRAS.
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_WLF_KOMWBPA_ITEM_STR, 
MANDT TYPE STRING,
WBELN TYPE STRING,
POSNR TYPE STRING,
PARVW TYPE STRING,
PARZA TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
DEFPA TYPE STRING,
PARNR TYPE STRING,
PERNR TYPE STRING,
ADDRESS TYPE STRING,
KNREF TYPE STRING,
_DATAAGING TYPE STRING,
LAND1 TYPE STRING,
REGIO TYPE STRING,
ASSIGNED_BP TYPE STRING,
ADDR_OPERATION TYPE STRING,
ADDR_TYPE TYPE STRING,
ADRNP TYPE STRING,
BP_REF_ADRNR TYPE STRING,
PLACE_HOLDER TYPE STRING,
ADRDAT TYPE STRING,
ADRNR TYPE STRING,
XCPDK TYPE STRING,
STCEG TYPE STRING,
ADRDA TYPE STRING,
NAME1 TYPE STRING,
NRART TYPE STRING,
PARVW_TEXT TYPE STRING,
SORT TYPE STRING,
ICON_PARTNER TYPE STRING,
ICON_ADDRESS TYPE STRING,
UPDKZ TYPE STRING,
ENHANCED TYPE STRING,
PARTNER TYPE STRING,
SPRAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLF_KOMWBPA_ITEM_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_WLF_KOMWBPA_ITEM_STR-MANDT sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-WBELN sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-POSNR sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-PARVW sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-PARZA sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ERNAM sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ERDAT sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-LIFNR sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-KUNNR sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-DEFPA sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-PARNR sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-PERNR sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ADDRESS sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-KNREF sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-_DATAAGING sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-LAND1 sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-REGIO sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ASSIGNED_BP sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ADDR_OPERATION sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ADDR_TYPE sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ADRNP sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-BP_REF_ADRNR sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-PLACE_HOLDER sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ADRDAT sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ADRNR sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-XCPDK sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-STCEG sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ADRDA sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-NAME1 sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-NRART sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-PARVW_TEXT sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-SORT sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ICON_PARTNER sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ICON_ADDRESS sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-UPDKZ sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-ENHANCED sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-PARTNER sy-vline 
WA_WLF_KOMWBPA_ITEM_STR-SPRAS sy-vline      INTO ld_text SEPARATED BY SPACE.

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