ABAP Select data from SAP table VKKKFKO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKKKFKO
*  INTO TABLE @DATA(IT_VKKKFKO2).
*--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_VKKKFKO INDEX 1 INTO DATA(WA_VKKKFKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKKKFKO>-MANDT = 1.
<VKKKFKO>-GSFNR = 1.
<VKKKFKO>-BELNR = 1.
<VKKKFKO>-ANZEP = 1.
<VKKKFKO>-BLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKKKFKO-BLTYP, sy-vline,
  WA_VKKKFKO-ABRZO, sy-vline,
  WA_VKKKFKO-ABRZU, sy-vline,
  WA_VKKKFKO-FREQZ, sy-vline,
  WA_VKKKFKO-GBETR, sy-vline,
  WA_VKKKFKO-GBISD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKKKFKO 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_VKKKFKO 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_VKKKFKO INTO WA_VKKKFKO.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field REFBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKKFKO-REFBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKKFKO-REFBL.
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_VKKKFKO_STR, 
MANDT TYPE STRING,
GSFNR TYPE STRING,
BELNR TYPE STRING,
ANZEP TYPE STRING,
BLART TYPE STRING,
BLTYP TYPE STRING,
ABRZO TYPE STRING,
ABRZU TYPE STRING,
FREQZ TYPE STRING,
GBETR TYPE STRING,
GBISD TYPE STRING,
BUKNZ TYPE STRING,
OPBUK TYPE STRING,
HFAEL TYPE STRING,
KZSIA TYPE STRING,
KZSIP TYPE STRING,
NFAEL TYPE STRING,
GPART TYPE STRING,
RBART TYPE STRING,
VTREF TYPE STRING,
RVTNR TYPE STRING,
SBHSL TYPE STRING,
TCODE TYPE STRING,
WAERS TYPE STRING,
BUDAT TYPE STRING,
VBUND TYPE STRING,
REFGF TYPE STRING,
REFBL TYPE STRING,
BLDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKKKFKO_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_VKKKFKO_STR-MANDT sy-vline 
WA_VKKKFKO_STR-GSFNR sy-vline 
WA_VKKKFKO_STR-BELNR sy-vline 
WA_VKKKFKO_STR-ANZEP sy-vline 
WA_VKKKFKO_STR-BLART sy-vline 
WA_VKKKFKO_STR-BLTYP sy-vline 
WA_VKKKFKO_STR-ABRZO sy-vline 
WA_VKKKFKO_STR-ABRZU sy-vline 
WA_VKKKFKO_STR-FREQZ sy-vline 
WA_VKKKFKO_STR-GBETR sy-vline 
WA_VKKKFKO_STR-GBISD sy-vline 
WA_VKKKFKO_STR-BUKNZ sy-vline 
WA_VKKKFKO_STR-OPBUK sy-vline 
WA_VKKKFKO_STR-HFAEL sy-vline 
WA_VKKKFKO_STR-KZSIA sy-vline 
WA_VKKKFKO_STR-KZSIP sy-vline 
WA_VKKKFKO_STR-NFAEL sy-vline 
WA_VKKKFKO_STR-GPART sy-vline 
WA_VKKKFKO_STR-RBART sy-vline 
WA_VKKKFKO_STR-VTREF sy-vline 
WA_VKKKFKO_STR-RVTNR sy-vline 
WA_VKKKFKO_STR-SBHSL sy-vline 
WA_VKKKFKO_STR-TCODE sy-vline 
WA_VKKKFKO_STR-WAERS sy-vline 
WA_VKKKFKO_STR-BUDAT sy-vline 
WA_VKKKFKO_STR-VBUND sy-vline 
WA_VKKKFKO_STR-REFGF sy-vline 
WA_VKKKFKO_STR-REFBL sy-vline 
WA_VKKKFKO_STR-BLDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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