ABAP Select data from SAP table DFKKCRP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKCRP
*  INTO TABLE @DATA(IT_DFKKCRP2).
*--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_DFKKCRP INDEX 1 INTO DATA(WA_DFKKCRP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKCRP>-MANDT = 1.
<DFKKCRP>-GPART = 1.
<DFKKCRP>-KJAHR = 1.
<DFKKCRP>-LFDNR = 1.
<DFKKCRP>-APPLK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKCRP-HERKF, sy-vline,
  WA_DFKKCRP-DATUM, sy-vline,
  WA_DFKKCRP-BONIT, sy-vline,
  WA_DFKKCRP-VKONT, sy-vline,
  WA_DFKKCRP-LAUFD, sy-vline,
  WA_DFKKCRP-LAUFI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKCRP 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_DFKKCRP 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_DFKKCRP INTO WA_DFKKCRP.


*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_DFKKCRP-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCRP-GPART.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field RLBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCRP-RLBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCRP-RLBEL.
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_DFKKCRP_STR, 
MANDT TYPE STRING,
GPART TYPE STRING,
KJAHR TYPE STRING,
LFDNR TYPE STRING,
APPLK TYPE STRING,
HERKF TYPE STRING,
DATUM TYPE STRING,
BONIT TYPE STRING,
VKONT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
MAZAE TYPE STRING,
RLBEL TYPE STRING,
BNARG TYPE STRING,
XBSTO TYPE STRING,
ERNAM TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
XNEGB TYPE STRING,
DOCCRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKCRP_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_DFKKCRP_STR-MANDT sy-vline 
WA_DFKKCRP_STR-GPART sy-vline 
WA_DFKKCRP_STR-KJAHR sy-vline 
WA_DFKKCRP_STR-LFDNR sy-vline 
WA_DFKKCRP_STR-APPLK sy-vline 
WA_DFKKCRP_STR-HERKF sy-vline 
WA_DFKKCRP_STR-DATUM sy-vline 
WA_DFKKCRP_STR-BONIT sy-vline 
WA_DFKKCRP_STR-VKONT sy-vline 
WA_DFKKCRP_STR-LAUFD sy-vline 
WA_DFKKCRP_STR-LAUFI sy-vline 
WA_DFKKCRP_STR-MAZAE sy-vline 
WA_DFKKCRP_STR-RLBEL sy-vline 
WA_DFKKCRP_STR-BNARG sy-vline 
WA_DFKKCRP_STR-XBSTO sy-vline 
WA_DFKKCRP_STR-ERNAM sy-vline 
WA_DFKKCRP_STR-CPUDT sy-vline 
WA_DFKKCRP_STR-CPUTM sy-vline 
WA_DFKKCRP_STR-XNEGB sy-vline 
WA_DFKKCRP_STR-DOCCRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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