ABAP Select data from SAP table VDKOREF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VDKOREF
*  INTO TABLE @DATA(IT_VDKOREF2).
*--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_VDKOREF INDEX 1 INTO DATA(WA_VDKOREF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VDKOREF>-MANDT = 1.
<VDKOREF>-RANTYP = 1.
<VDKOREF>-BUKRS = 1.
<VDKOREF>-RANL = 1.
<VDKOREF>-RLDEPO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VDKOREF-DTRANS, sy-vline,
  WA_VDKOREF-NTRANS, sy-vline,
  WA_VDKOREF-RERF, sy-vline,
  WA_VDKOREF-DERF, sy-vline,
  WA_VDKOREF-TERF, sy-vline,
  WA_VDKOREF-REHER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VDKOREF 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_VDKOREF 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_VDKOREF INTO WA_VDKOREF.


*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 RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VDKOREF-RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VDKOREF-RANL.
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_VDKOREF_STR, 
MANDT TYPE STRING,
RANTYP TYPE STRING,
BUKRS TYPE STRING,
RANL TYPE STRING,
RLDEPO TYPE STRING,
DTRANS TYPE STRING,
NTRANS TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
SANLF TYPE STRING,
GSART TYPE STRING,
DBUDAT TYPE STRING,
REFKONTA TYPE STRING,
REFKONTN TYPE STRING,
JGEBUCHT TYPE STRING,
JMELDCH TYPE STRING,
RUMBU TYPE STRING,
DUMBU TYPE STRING,
TUMBU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VDKOREF_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_VDKOREF_STR-MANDT sy-vline 
WA_VDKOREF_STR-RANTYP sy-vline 
WA_VDKOREF_STR-BUKRS sy-vline 
WA_VDKOREF_STR-RANL sy-vline 
WA_VDKOREF_STR-RLDEPO sy-vline 
WA_VDKOREF_STR-DTRANS sy-vline 
WA_VDKOREF_STR-NTRANS sy-vline 
WA_VDKOREF_STR-RERF sy-vline 
WA_VDKOREF_STR-DERF sy-vline 
WA_VDKOREF_STR-TERF sy-vline 
WA_VDKOREF_STR-REHER sy-vline 
WA_VDKOREF_STR-RBEAR sy-vline 
WA_VDKOREF_STR-DBEAR sy-vline 
WA_VDKOREF_STR-TBEAR sy-vline 
WA_VDKOREF_STR-RBHER sy-vline 
WA_VDKOREF_STR-SANLF sy-vline 
WA_VDKOREF_STR-GSART sy-vline 
WA_VDKOREF_STR-DBUDAT sy-vline 
WA_VDKOREF_STR-REFKONTA sy-vline 
WA_VDKOREF_STR-REFKONTN sy-vline 
WA_VDKOREF_STR-JGEBUCHT sy-vline 
WA_VDKOREF_STR-JMELDCH sy-vline 
WA_VDKOREF_STR-RUMBU sy-vline 
WA_VDKOREF_STR-DUMBU sy-vline 
WA_VDKOREF_STR-TUMBU sy-vline      INTO ld_text SEPARATED BY SPACE.

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