ABAP Select data from SAP table DFKKOP_DP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKOP_DP
*  INTO TABLE @DATA(IT_DFKKOP_DP2).
*--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_DFKKOP_DP INDEX 1 INTO DATA(WA_DFKKOP_DP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKOP_DP>-MANDT = 1.
<DFKKOP_DP>-OPBEL = 1.
<DFKKOP_DP>-OPUPW = 1.
<DFKKOP_DP>-OPUPK = 1.
<DFKKOP_DP>-OPUPZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKOP_DP-LFDNR, sy-vline,
  WA_DFKKOP_DP-MWSKO, sy-vline,
  WA_DFKKOP_DP-MWVKO, sy-vline,
  WA_DFKKOP_DP-SBETW, sy-vline,
  WA_DFKKOP_DP-SBETH, sy-vline,
  WA_DFKKOP_DP-SBET2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKOP_DP 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_DFKKOP_DP 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_DFKKOP_DP INTO WA_DFKKOP_DP.


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

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

*Conversion exit ALPHA, internal->external for field MWVKO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKOP_DP-MWVKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKOP_DP-MWVKO.
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_DFKKOP_DP_STR, 
MANDT TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
LFDNR TYPE STRING,
MWSKO TYPE STRING,
MWVKO TYPE STRING,
SBETW TYPE STRING,
SBETH TYPE STRING,
SBET2 TYPE STRING,
SBET3 TYPE STRING,
KTOSL TYPE STRING,
KSCHL TYPE STRING,
STPRZ TYPE STRING,
SBASW TYPE STRING,
SBASH TYPE STRING,
TXJCD TYPE STRING,
TXCNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKOP_DP_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_DFKKOP_DP_STR-MANDT sy-vline 
WA_DFKKOP_DP_STR-OPBEL sy-vline 
WA_DFKKOP_DP_STR-OPUPW sy-vline 
WA_DFKKOP_DP_STR-OPUPK sy-vline 
WA_DFKKOP_DP_STR-OPUPZ sy-vline 
WA_DFKKOP_DP_STR-LFDNR sy-vline 
WA_DFKKOP_DP_STR-MWSKO sy-vline 
WA_DFKKOP_DP_STR-MWVKO sy-vline 
WA_DFKKOP_DP_STR-SBETW sy-vline 
WA_DFKKOP_DP_STR-SBETH sy-vline 
WA_DFKKOP_DP_STR-SBET2 sy-vline 
WA_DFKKOP_DP_STR-SBET3 sy-vline 
WA_DFKKOP_DP_STR-KTOSL sy-vline 
WA_DFKKOP_DP_STR-KSCHL sy-vline 
WA_DFKKOP_DP_STR-STPRZ sy-vline 
WA_DFKKOP_DP_STR-SBASW sy-vline 
WA_DFKKOP_DP_STR-SBASH sy-vline 
WA_DFKKOP_DP_STR-TXJCD sy-vline 
WA_DFKKOP_DP_STR-TXCNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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