ABAP Select data from SAP table DFKKRES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKRES
*  INTO TABLE @DATA(IT_DFKKRES2).
*--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_DFKKRES INDEX 1 INTO DATA(WA_DFKKRES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKRES>-MANDT = 1.
<DFKKRES>-GPART_RES = 1.
<DFKKRES>-BUDAT = 1.
<DFKKRES>-OPBEL = 1.
<DFKKRES>-OPUPK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKRES-BUKRS, sy-vline,
  WA_DFKKRES-GSBER, sy-vline,
  WA_DFKKRES-SEGMENT, sy-vline,
  WA_DFKKRES-VBUND, sy-vline,
  WA_DFKKRES-HKONT, sy-vline,
  WA_DFKKRES-BETRH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKRES 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_DFKKRES 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_DFKKRES INTO WA_DFKKRES.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field VBUND_NEW
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKRES-VBUND_NEW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKRES-VBUND_NEW.
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_DFKKRES_STR, 
MANDT TYPE STRING,
GPART_RES TYPE STRING,
BUDAT TYPE STRING,
OPBEL TYPE STRING,
OPUPK TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
SEGMENT TYPE STRING,
VBUND TYPE STRING,
HKONT TYPE STRING,
BETRH TYPE STRING,
BETRW TYPE STRING,
WAERS TYPE STRING,
VBUND_NEW TYPE STRING,
REBOOKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKRES_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_DFKKRES_STR-MANDT sy-vline 
WA_DFKKRES_STR-GPART_RES sy-vline 
WA_DFKKRES_STR-BUDAT sy-vline 
WA_DFKKRES_STR-OPBEL sy-vline 
WA_DFKKRES_STR-OPUPK sy-vline 
WA_DFKKRES_STR-BUKRS sy-vline 
WA_DFKKRES_STR-GSBER sy-vline 
WA_DFKKRES_STR-SEGMENT sy-vline 
WA_DFKKRES_STR-VBUND sy-vline 
WA_DFKKRES_STR-HKONT sy-vline 
WA_DFKKRES_STR-BETRH sy-vline 
WA_DFKKRES_STR-BETRW sy-vline 
WA_DFKKRES_STR-WAERS sy-vline 
WA_DFKKRES_STR-VBUND_NEW sy-vline 
WA_DFKKRES_STR-REBOOKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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