ABAP Select data from SAP table VKKKVTRG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKKKVTRG
*  INTO TABLE @DATA(IT_VKKKVTRG2).
*--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_VKKKVTRG INDEX 1 INTO DATA(WA_VKKKVTRG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKKKVTRG>-VTREF = 1.
<VKKKVTRG>-ENDED = 1.
<VKKKVTRG>-STORD = 1.
<VKKKVTRG>-STORG = 1.
<VKKKVTRG>-VNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKKKVTRG-VNAME1, sy-vline,
  WA_VKKKVTRG-VSTRAS, sy-vline,
  WA_VKKKVTRG-VORT, sy-vline,
  WA_VKKKVTRG-VPLZ, sy-vline,
  WA_VKKKVTRG-RNAME, sy-vline,
  WA_VKKKVTRG-RNAME1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKKKVTRG 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_VKKKVTRG 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_VKKKVTRG INTO WA_VKKKVTRG.


*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 VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKKVTRG-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKKVTRG-VTREF.
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_VKKKVTRG_STR, 
VTREF TYPE STRING,
ENDED TYPE STRING,
STORD TYPE STRING,
STORG TYPE STRING,
VNAME TYPE STRING,
VNAME1 TYPE STRING,
VSTRAS TYPE STRING,
VORT TYPE STRING,
VPLZ TYPE STRING,
RNAME TYPE STRING,
RNAME1 TYPE STRING,
RSTRAS TYPE STRING,
RORT TYPE STRING,
RPLZ TYPE STRING,
BEGNN TYPE STRING,
ENDEV TYPE STRING,
VSTAT TYPE STRING,
KFZKZ TYPE STRING,
VERMB TYPE STRING,
SCHAN TYPE STRING,
SCHAD TYPE STRING,
SCHAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKKKVTRG_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_VKKKVTRG_STR-VTREF sy-vline 
WA_VKKKVTRG_STR-ENDED sy-vline 
WA_VKKKVTRG_STR-STORD sy-vline 
WA_VKKKVTRG_STR-STORG sy-vline 
WA_VKKKVTRG_STR-VNAME sy-vline 
WA_VKKKVTRG_STR-VNAME1 sy-vline 
WA_VKKKVTRG_STR-VSTRAS sy-vline 
WA_VKKKVTRG_STR-VORT sy-vline 
WA_VKKKVTRG_STR-VPLZ sy-vline 
WA_VKKKVTRG_STR-RNAME sy-vline 
WA_VKKKVTRG_STR-RNAME1 sy-vline 
WA_VKKKVTRG_STR-RSTRAS sy-vline 
WA_VKKKVTRG_STR-RORT sy-vline 
WA_VKKKVTRG_STR-RPLZ sy-vline 
WA_VKKKVTRG_STR-BEGNN sy-vline 
WA_VKKKVTRG_STR-ENDEV sy-vline 
WA_VKKKVTRG_STR-VSTAT sy-vline 
WA_VKKKVTRG_STR-KFZKZ sy-vline 
WA_VKKKVTRG_STR-VERMB sy-vline 
WA_VKKKVTRG_STR-SCHAN sy-vline 
WA_VKKKVTRG_STR-SCHAD sy-vline 
WA_VKKKVTRG_STR-SCHAS sy-vline      INTO ld_text SEPARATED BY SPACE.

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