ABAP Select data from SAP table DFKKOPBEW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKOPBEW
*  INTO TABLE @DATA(IT_DFKKOPBEW2).
*--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_DFKKOPBEW INDEX 1 INTO DATA(WA_DFKKOPBEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKOPBEW>-MANDT = 1.
<DFKKOPBEW>-OPBEL = 1.
<DFKKOPBEW>-OPUPK = 1.
<DFKKOPBEW>-BWDAT = 1.
<DFKKOPBEW>-CURTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKOPBEW-BWVAR, sy-vline,
  WA_DFKKOPBEW-FBZAE, sy-vline,
  WA_DFKKOPBEW-BUKRS, sy-vline,
  WA_DFKKOPBEW-WAERS_F, sy-vline,
  WA_DFKKOPBEW-HWTYP, sy-vline,
  WA_DFKKOPBEW-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKOPBEW 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_DFKKOPBEW 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_DFKKOPBEW INTO WA_DFKKOPBEW.


*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_DFKKOPBEW-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKOPBEW-OPBEL.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKOPBEW-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKOPBEW-RLDNR.
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_DFKKOPBEW_STR, 
MANDT TYPE STRING,
OPBEL TYPE STRING,
OPUPK TYPE STRING,
BWDAT TYPE STRING,
CURTP TYPE STRING,
BWVAR TYPE STRING,
FBZAE TYPE STRING,
BUKRS TYPE STRING,
WAERS_F TYPE STRING,
HWTYP TYPE STRING,
GSBER TYPE STRING,
SEGMENT TYPE STRING,
PRCTR TYPE STRING,
LDGRP TYPE STRING,
VKONT TYPE STRING,
GPART TYPE STRING,
HKONT TYPE STRING,
UBETR TYPE STRING,
VBETR TYPE STRING,
BDIFF TYPE STRING,
WAERS TYPE STRING,
STOFLG TYPE STRING,
RLDNR TYPE STRING,
BETRH_VA TYPE STRING,
BDIFF_VA TYPE STRING,
BETRW_VA TYPE STRING,
BETRW TYPE STRING,
KURSB TYPE STRING,
SIMUL TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKOPBEW_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_DFKKOPBEW_STR-MANDT sy-vline 
WA_DFKKOPBEW_STR-OPBEL sy-vline 
WA_DFKKOPBEW_STR-OPUPK sy-vline 
WA_DFKKOPBEW_STR-BWDAT sy-vline 
WA_DFKKOPBEW_STR-CURTP sy-vline 
WA_DFKKOPBEW_STR-BWVAR sy-vline 
WA_DFKKOPBEW_STR-FBZAE sy-vline 
WA_DFKKOPBEW_STR-BUKRS sy-vline 
WA_DFKKOPBEW_STR-WAERS_F sy-vline 
WA_DFKKOPBEW_STR-HWTYP sy-vline 
WA_DFKKOPBEW_STR-GSBER sy-vline 
WA_DFKKOPBEW_STR-SEGMENT sy-vline 
WA_DFKKOPBEW_STR-PRCTR sy-vline 
WA_DFKKOPBEW_STR-LDGRP sy-vline 
WA_DFKKOPBEW_STR-VKONT sy-vline 
WA_DFKKOPBEW_STR-GPART sy-vline 
WA_DFKKOPBEW_STR-HKONT sy-vline 
WA_DFKKOPBEW_STR-UBETR sy-vline 
WA_DFKKOPBEW_STR-VBETR sy-vline 
WA_DFKKOPBEW_STR-BDIFF sy-vline 
WA_DFKKOPBEW_STR-WAERS sy-vline 
WA_DFKKOPBEW_STR-STOFLG sy-vline 
WA_DFKKOPBEW_STR-RLDNR sy-vline 
WA_DFKKOPBEW_STR-BETRH_VA sy-vline 
WA_DFKKOPBEW_STR-BDIFF_VA sy-vline 
WA_DFKKOPBEW_STR-BETRW_VA sy-vline 
WA_DFKKOPBEW_STR-BETRW sy-vline 
WA_DFKKOPBEW_STR-KURSB sy-vline 
WA_DFKKOPBEW_STR-SIMUL sy-vline 
WA_DFKKOPBEW_STR-LAUFD sy-vline 
WA_DFKKOPBEW_STR-LAUFI sy-vline      INTO ld_text SEPARATED BY SPACE.

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