ABAP Select data from SAP table DFKKOPW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKOPW
*  INTO TABLE @DATA(IT_DFKKOPW2).
*--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_DFKKOPW INDEX 1 INTO DATA(WA_DFKKOPW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKOPW>-MANDT = 1.
<DFKKOPW>-OPBEL = 1.
<DFKKOPW>-WHGRP = 1.
<DFKKOPW>-OPUPW = 1.
<DFKKOPW>-WHANZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKOPW-GPART, sy-vline,
  WA_DFKKOPW-VKONT, sy-vline,
  WA_DFKKOPW-ABWBL, sy-vline,
  WA_DFKKOPW-ABWTP, sy-vline,
  WA_DFKKOPW-BUDAT, sy-vline,
  WA_DFKKOPW-FAEDN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKOPW 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_DFKKOPW 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_DFKKOPW INTO WA_DFKKOPW.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PNNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKOPW-PNNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKOPW-PNNUM.
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_DFKKOPW_STR, 
MANDT TYPE STRING,
OPBEL TYPE STRING,
WHGRP TYPE STRING,
OPUPW TYPE STRING,
WHANZ TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
ABWBL TYPE STRING,
ABWTP TYPE STRING,
BUDAT TYPE STRING,
FAEDN TYPE STRING,
FAEDS TYPE STRING,
PERSL TYPE STRING,
XAESP TYPE STRING,
MANSP TYPE STRING,
AUGDT TYPE STRING,
AUGBL TYPE STRING,
AUGBD TYPE STRING,
AUGRD TYPE STRING,
AUGVD TYPE STRING,
AUGOB TYPE STRING,
XAUFL TYPE STRING,
XRAGL TYPE STRING,
XPYOR TYPE STRING,
STZAL TYPE STRING,
_DATAAGING TYPE STRING,
PNNUM TYPE STRING,
PNHKF TYPE STRING,
PNEXD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKOPW_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_DFKKOPW_STR-MANDT sy-vline 
WA_DFKKOPW_STR-OPBEL sy-vline 
WA_DFKKOPW_STR-WHGRP sy-vline 
WA_DFKKOPW_STR-OPUPW sy-vline 
WA_DFKKOPW_STR-WHANZ sy-vline 
WA_DFKKOPW_STR-GPART sy-vline 
WA_DFKKOPW_STR-VKONT sy-vline 
WA_DFKKOPW_STR-ABWBL sy-vline 
WA_DFKKOPW_STR-ABWTP sy-vline 
WA_DFKKOPW_STR-BUDAT sy-vline 
WA_DFKKOPW_STR-FAEDN sy-vline 
WA_DFKKOPW_STR-FAEDS sy-vline 
WA_DFKKOPW_STR-PERSL sy-vline 
WA_DFKKOPW_STR-XAESP sy-vline 
WA_DFKKOPW_STR-MANSP sy-vline 
WA_DFKKOPW_STR-AUGDT sy-vline 
WA_DFKKOPW_STR-AUGBL sy-vline 
WA_DFKKOPW_STR-AUGBD sy-vline 
WA_DFKKOPW_STR-AUGRD sy-vline 
WA_DFKKOPW_STR-AUGVD sy-vline 
WA_DFKKOPW_STR-AUGOB sy-vline 
WA_DFKKOPW_STR-XAUFL sy-vline 
WA_DFKKOPW_STR-XRAGL sy-vline 
WA_DFKKOPW_STR-XPYOR sy-vline 
WA_DFKKOPW_STR-STZAL sy-vline 
WA_DFKKOPW_STR-_DATAAGING sy-vline 
WA_DFKKOPW_STR-PNNUM sy-vline 
WA_DFKKOPW_STR-PNHKF sy-vline 
WA_DFKKOPW_STR-PNEXD sy-vline      INTO ld_text SEPARATED BY SPACE.

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