ABAP Select data from SAP table VIGWAK24 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VIGWAK24 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 VIGWAK24. 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 VIGWAK24 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_VIGWAK24 TYPE STANDARD TABLE OF VIGWAK24,
      WA_VIGWAK24 TYPE VIGWAK24,
      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: <VIGWAK24> TYPE VIGWAK24.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VIGWAK24.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VIGWAK24
  INTO TABLE IT_VIGWAK24.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIGWAK24
*  INTO TABLE @DATA(IT_VIGWAK242).
*--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_VIGWAK24 INDEX 1 INTO DATA(WA_VIGWAK242).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VIGWAK24 ASSIGNING <VIGWAK24>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIGWAK24>-MANDT = 1.
<VIGWAK24>-BUKRS = 1.
<VIGWAK24>-SWENRNKA = 1.
<VIGWAK24>-STEILNME = 1.
<VIGWAK24>-INTRENO = 1.

ENDLOOP.

LOOP AT IT_VIGWAK24 INTO WA_VIGWAK24.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIGWAK24-VERSION, sy-vline,
  WA_VIGWAK24-DGABFL, sy-vline,
  WA_VIGWAK24-DBISFL, sy-vline,
  WA_VIGWAK24-JARCHIVE, sy-vline,
  WA_VIGWAK24-ROART, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_VIGWAK24 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_VIGWAK24 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_VIGWAK24 INTO WA_VIGWAK24.


*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 SWENR, internal->external for field SWENRNKA
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_VIGWAK24-SWENRNKA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIGWAK24-SWENRNKA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STEILNME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIGWAK24-STEILNME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIGWAK24-STEILNME.
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_VIGWAK24_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
SWENRNKA TYPE STRING,
STEILNME TYPE STRING,
INTRENO TYPE STRING,
VERSION TYPE STRING,
DGABFL TYPE STRING,
DBISFL TYPE STRING,
JARCHIVE TYPE STRING,
ROART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIGWAK24_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_VIGWAK24_STR-MANDT sy-vline 
WA_VIGWAK24_STR-BUKRS sy-vline 
WA_VIGWAK24_STR-SWENRNKA sy-vline 
WA_VIGWAK24_STR-STEILNME sy-vline 
WA_VIGWAK24_STR-INTRENO sy-vline 
WA_VIGWAK24_STR-VERSION sy-vline 
WA_VIGWAK24_STR-DGABFL sy-vline 
WA_VIGWAK24_STR-DBISFL sy-vline 
WA_VIGWAK24_STR-JARCHIVE sy-vline 
WA_VIGWAK24_STR-ROART sy-vline      INTO ld_text SEPARATED BY SPACE.

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