ABAP Select data from SAP table WDFR_S_LISTE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDFR_S_LISTE
*  INTO TABLE @DATA(IT_WDFR_S_LISTE2).
*--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_WDFR_S_LISTE INDEX 1 INTO DATA(WA_WDFR_S_LISTE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WDFR_S_LISTE>-FBELN = 1.
<WDFR_S_LISTE>-WERKS = 1.
<WDFR_S_LISTE>-WVKORG = 1.
<WDFR_S_LISTE>-WVTWEG = 1.
<WDFR_S_LISTE>-WVSPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WDFR_S_LISTE-FBEZCH, sy-vline,
  WA_WDFR_S_LISTE-EINDT, sy-vline,
  WA_WDFR_S_LISTE-AINDT, sy-vline,
  WA_WDFR_S_LISTE-ERDAT, sy-vline,
  WA_WDFR_S_LISTE-ERNAM, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_WDFR_S_LISTE 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_WDFR_S_LISTE 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_WDFR_S_LISTE INTO WA_WDFR_S_LISTE.


*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 FBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WDFR_S_LISTE-FBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WDFR_S_LISTE-FBELN.
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_WDFR_S_LISTE_STR, 
FBELN TYPE STRING,
WERKS TYPE STRING,
WVKORG TYPE STRING,
WVTWEG TYPE STRING,
WVSPART TYPE STRING,
FBEZCH TYPE STRING,
EINDT TYPE STRING,
AINDT TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDFR_S_LISTE_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_WDFR_S_LISTE_STR-FBELN sy-vline 
WA_WDFR_S_LISTE_STR-WERKS sy-vline 
WA_WDFR_S_LISTE_STR-WVKORG sy-vline 
WA_WDFR_S_LISTE_STR-WVTWEG sy-vline 
WA_WDFR_S_LISTE_STR-WVSPART sy-vline 
WA_WDFR_S_LISTE_STR-FBEZCH sy-vline 
WA_WDFR_S_LISTE_STR-EINDT sy-vline 
WA_WDFR_S_LISTE_STR-AINDT sy-vline 
WA_WDFR_S_LISTE_STR-ERDAT sy-vline 
WA_WDFR_S_LISTE_STR-ERNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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