ABAP Select data from SAP table WLF_LIST_OUTPUT_SD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WLF_LIST_OUTPUT_SD 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_LIST_OUTPUT_SD. 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_LIST_OUTPUT_SD 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_LIST_OUTPUT_SD TYPE STANDARD TABLE OF WLF_LIST_OUTPUT_SD,
      WA_WLF_LIST_OUTPUT_SD TYPE WLF_LIST_OUTPUT_SD,
      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_LIST_OUTPUT_SD> TYPE WLF_LIST_OUTPUT_SD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLF_LIST_OUTPUT_SD
*  INTO TABLE @DATA(IT_WLF_LIST_OUTPUT_SD2).
*--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_LIST_OUTPUT_SD INDEX 1 INTO DATA(WA_WLF_LIST_OUTPUT_SD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLF_LIST_OUTPUT_SD>-VBELN = 1.
<WLF_LIST_OUTPUT_SD>-FKART = 1.
<WLF_LIST_OUTPUT_SD>-VKORG = 1.
<WLF_LIST_OUTPUT_SD>-KUNRG = 1.
<WLF_LIST_OUTPUT_SD>-KUNRG_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLF_LIST_OUTPUT_SD-KUNAG, sy-vline,
  WA_WLF_LIST_OUTPUT_SD-KUNAG_NAME, sy-vline,
  WA_WLF_LIST_OUTPUT_SD-FKDAT, sy-vline,
  WA_WLF_LIST_OUTPUT_SD-NETWR, sy-vline,
  WA_WLF_LIST_OUTPUT_SD-MWSBK, sy-vline,
  WA_WLF_LIST_OUTPUT_SD-WAERK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLF_LIST_OUTPUT_SD 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_LIST_OUTPUT_SD 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_LIST_OUTPUT_SD INTO WA_WLF_LIST_OUTPUT_SD.


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

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

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WLF_LIST_OUTPUT_SD-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLF_LIST_OUTPUT_SD-KUNAG.
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_LIST_OUTPUT_SD_STR, 
VBELN TYPE STRING,
FKART TYPE STRING,
VKORG TYPE STRING,
KUNRG TYPE STRING,
KUNRG_NAME TYPE STRING,
KUNAG TYPE STRING,
KUNAG_NAME TYPE STRING,
FKDAT TYPE STRING,
NETWR TYPE STRING,
MWSBK TYPE STRING,
WAERK TYPE STRING,
RFBSK TYPE STRING,
VALTG TYPE STRING,
VALDT TYPE STRING,
ZTERM TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
XBLNR TYPE STRING,
ZUONR TYPE STRING,
KIDNO TYPE STRING,
FKTYP TYPE STRING,
VBTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLF_LIST_OUTPUT_SD_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_LIST_OUTPUT_SD_STR-VBELN sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-FKART sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-VKORG sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-KUNRG sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-KUNRG_NAME sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-KUNAG sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-KUNAG_NAME sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-FKDAT sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-NETWR sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-MWSBK sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-WAERK sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-RFBSK sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-VALTG sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-VALDT sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-ZTERM sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-ERNAM sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-ERDAT sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-VTWEG sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-SPART sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-XBLNR sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-ZUONR sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-KIDNO sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-FKTYP sy-vline 
WA_WLF_LIST_OUTPUT_SD_STR-VBTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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