ABAP Select data from SAP table VKKKFKODAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKKKFKODAT
*  INTO TABLE @DATA(IT_VKKKFKODAT2).
*--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_VKKKFKODAT INDEX 1 INTO DATA(WA_VKKKFKODAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKKKFKODAT>-ANZEP = 1.
<VKKKFKODAT>-BLART = 1.
<VKKKFKODAT>-BLTYP = 1.
<VKKKFKODAT>-ABRZO = 1.
<VKKKFKODAT>-ABRZU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKKKFKODAT-FREQZ, sy-vline,
  WA_VKKKFKODAT-GBETR, sy-vline,
  WA_VKKKFKODAT-GBISD, sy-vline,
  WA_VKKKFKODAT-BUKNZ, sy-vline,
  WA_VKKKFKODAT-OPBUK, sy-vline,
  WA_VKKKFKODAT-HFAEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKKKFKODAT 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_VKKKFKODAT 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_VKKKFKODAT INTO WA_VKKKFKODAT.


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

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

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

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

*Conversion exit ALPHA, internal->external for field REFBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKKFKODAT-REFBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKKFKODAT-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_VKKKFKODAT_STR, 
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_VKKKFKODAT_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_VKKKFKODAT_STR-ANZEP sy-vline 
WA_VKKKFKODAT_STR-BLART sy-vline 
WA_VKKKFKODAT_STR-BLTYP sy-vline 
WA_VKKKFKODAT_STR-ABRZO sy-vline 
WA_VKKKFKODAT_STR-ABRZU sy-vline 
WA_VKKKFKODAT_STR-FREQZ sy-vline 
WA_VKKKFKODAT_STR-GBETR sy-vline 
WA_VKKKFKODAT_STR-GBISD sy-vline 
WA_VKKKFKODAT_STR-BUKNZ sy-vline 
WA_VKKKFKODAT_STR-OPBUK sy-vline 
WA_VKKKFKODAT_STR-HFAEL sy-vline 
WA_VKKKFKODAT_STR-KZSIA sy-vline 
WA_VKKKFKODAT_STR-KZSIP sy-vline 
WA_VKKKFKODAT_STR-NFAEL sy-vline 
WA_VKKKFKODAT_STR-GPART sy-vline 
WA_VKKKFKODAT_STR-RBART sy-vline 
WA_VKKKFKODAT_STR-VTREF sy-vline 
WA_VKKKFKODAT_STR-RVTNR sy-vline 
WA_VKKKFKODAT_STR-SBHSL sy-vline 
WA_VKKKFKODAT_STR-TCODE sy-vline 
WA_VKKKFKODAT_STR-WAERS sy-vline 
WA_VKKKFKODAT_STR-BUDAT sy-vline 
WA_VKKKFKODAT_STR-VBUND sy-vline 
WA_VKKKFKODAT_STR-REFGF sy-vline 
WA_VKKKFKODAT_STR-REFBL sy-vline 
WA_VKKKFKODAT_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.