ABAP Select data from SAP table DFKKRDI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKRDI
*  INTO TABLE @DATA(IT_DFKKRDI2).
*--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_DFKKRDI INDEX 1 INTO DATA(WA_DFKKRDI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKRDI>-MANDT = 1.
<DFKKRDI>-LAUFD = 1.
<DFKKRDI>-LAUFI = 1.
<DFKKRDI>-FINRE = 1.
<DFKKRDI>-OPBEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKRDI-OPUPW, sy-vline,
  WA_DFKKRDI-OPUPK, sy-vline,
  WA_DFKKRDI-OPUPZ, sy-vline,
  WA_DFKKRDI-CORRECT, sy-vline,
  WA_DFKKRDI-OPBELD, sy-vline,
  WA_DFKKRDI-GPART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKRDI 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_DFKKRDI 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_DFKKRDI INTO WA_DFKKRDI.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field XBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKRDI-XBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKRDI-XBLNR.
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_DFKKRDI_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
FINRE TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
CORRECT TYPE STRING,
OPBELD TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
VTPOS TYPE STRING,
XBLNR TYPE STRING,
WAERS TYPE STRING,
BETRW TYPE STRING,
HVORG TYPE STRING,
TVORG TYPE STRING,
SUBAP TYPE STRING,
XDETDOC TYPE STRING,
XNEGP TYPE STRING,
BETRW_ORIG TYPE STRING,
KOFIZ TYPE STRING,
DISTYP TYPE STRING,
DISKEY TYPE STRING,
DISPER TYPE STRING,
DOC_KEY TYPE STRING,
XAGGR TYPE STRING,
XAGGR_BASE TYPE STRING,
XREV TYPE STRING,
BUKRS TYPE STRING,
HVORG_ORIG TYPE STRING,
TVORG_ORIG TYPE STRING,
DISGRP TYPE STRING,
PERSL TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
LAUFD_POST TYPE STRING,
LAUFI_POST TYPE STRING,
CPUDT_POST TYPE STRING,
CPUTM_POST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKRDI_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_DFKKRDI_STR-MANDT sy-vline 
WA_DFKKRDI_STR-LAUFD sy-vline 
WA_DFKKRDI_STR-LAUFI sy-vline 
WA_DFKKRDI_STR-FINRE sy-vline 
WA_DFKKRDI_STR-OPBEL sy-vline 
WA_DFKKRDI_STR-OPUPW sy-vline 
WA_DFKKRDI_STR-OPUPK sy-vline 
WA_DFKKRDI_STR-OPUPZ sy-vline 
WA_DFKKRDI_STR-CORRECT sy-vline 
WA_DFKKRDI_STR-OPBELD sy-vline 
WA_DFKKRDI_STR-GPART sy-vline 
WA_DFKKRDI_STR-VKONT sy-vline 
WA_DFKKRDI_STR-VTREF sy-vline 
WA_DFKKRDI_STR-VTPOS sy-vline 
WA_DFKKRDI_STR-XBLNR sy-vline 
WA_DFKKRDI_STR-WAERS sy-vline 
WA_DFKKRDI_STR-BETRW sy-vline 
WA_DFKKRDI_STR-HVORG sy-vline 
WA_DFKKRDI_STR-TVORG sy-vline 
WA_DFKKRDI_STR-SUBAP sy-vline 
WA_DFKKRDI_STR-XDETDOC sy-vline 
WA_DFKKRDI_STR-XNEGP sy-vline 
WA_DFKKRDI_STR-BETRW_ORIG sy-vline 
WA_DFKKRDI_STR-KOFIZ sy-vline 
WA_DFKKRDI_STR-DISTYP sy-vline 
WA_DFKKRDI_STR-DISKEY sy-vline 
WA_DFKKRDI_STR-DISPER sy-vline 
WA_DFKKRDI_STR-DOC_KEY sy-vline 
WA_DFKKRDI_STR-XAGGR sy-vline 
WA_DFKKRDI_STR-XAGGR_BASE sy-vline 
WA_DFKKRDI_STR-XREV sy-vline 
WA_DFKKRDI_STR-BUKRS sy-vline 
WA_DFKKRDI_STR-HVORG_ORIG sy-vline 
WA_DFKKRDI_STR-TVORG_ORIG sy-vline 
WA_DFKKRDI_STR-DISGRP sy-vline 
WA_DFKKRDI_STR-PERSL sy-vline 
WA_DFKKRDI_STR-CPUDT sy-vline 
WA_DFKKRDI_STR-CPUTM sy-vline 
WA_DFKKRDI_STR-LAUFD_POST sy-vline 
WA_DFKKRDI_STR-LAUFI_POST sy-vline 
WA_DFKKRDI_STR-CPUDT_POST sy-vline 
WA_DFKKRDI_STR-CPUTM_POST sy-vline      INTO ld_text SEPARATED BY SPACE.

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