ABAP Select data from SAP table DFKKCOMA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKCOMA
*  INTO TABLE @DATA(IT_DFKKCOMA2).
*--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_DFKKCOMA INDEX 1 INTO DATA(WA_DFKKCOMA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKCOMA>-MANDT = 1.
<DFKKCOMA>-LAUFD = 1.
<DFKKCOMA>-LAUFI = 1.
<DFKKCOMA>-COKEY = 1.
<DFKKCOMA>-COTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKCOMA-AUSDT, sy-vline,
  WA_DFKKCOMA-GPART, sy-vline,
  WA_DFKKCOMA-VKONT, sy-vline,
  WA_DFKKCOMA-VTREF, sy-vline,
  WA_DFKKCOMA-SUBAP, sy-vline,
  WA_DFKKCOMA-MAHNV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKCOMA 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_DFKKCOMA 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_DFKKCOMA INTO WA_DFKKCOMA.


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

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

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

*Conversion exit ALPHA, internal->external for field MG1BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCOMA-MG1BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCOMA-MG1BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MG2BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCOMA-MG2BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCOMA-MG2BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MG3BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCOMA-MG3BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCOMA-MG3BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NRZAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCOMA-NRZAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCOMA-NRZAS.
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_DFKKCOMA_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
COKEY TYPE STRING,
COTYP TYPE STRING,
AUSDT TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
MAHNV TYPE STRING,
MAHNS TYPE STRING,
CHGID TYPE STRING,
MGE1M TYPE STRING,
MG1BL TYPE STRING,
MG1TY TYPE STRING,
MGE2M TYPE STRING,
MG2BL TYPE STRING,
MG2TY TYPE STRING,
MGE3M TYPE STRING,
MG3BL TYPE STRING,
MG3TY TYPE STRING,
BUKRS TYPE STRING,
WAERS TYPE STRING,
FAEDN TYPE STRING,
NRZAS TYPE STRING,
XMSTO TYPE STRING,
MSALM TYPE STRING,
MDRKDC TYPE STRING,
XERIN TYPE STRING,
MAHNN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKCOMA_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_DFKKCOMA_STR-MANDT sy-vline 
WA_DFKKCOMA_STR-LAUFD sy-vline 
WA_DFKKCOMA_STR-LAUFI sy-vline 
WA_DFKKCOMA_STR-COKEY sy-vline 
WA_DFKKCOMA_STR-COTYP sy-vline 
WA_DFKKCOMA_STR-AUSDT sy-vline 
WA_DFKKCOMA_STR-GPART sy-vline 
WA_DFKKCOMA_STR-VKONT sy-vline 
WA_DFKKCOMA_STR-VTREF sy-vline 
WA_DFKKCOMA_STR-SUBAP sy-vline 
WA_DFKKCOMA_STR-MAHNV sy-vline 
WA_DFKKCOMA_STR-MAHNS sy-vline 
WA_DFKKCOMA_STR-CHGID sy-vline 
WA_DFKKCOMA_STR-MGE1M sy-vline 
WA_DFKKCOMA_STR-MG1BL sy-vline 
WA_DFKKCOMA_STR-MG1TY sy-vline 
WA_DFKKCOMA_STR-MGE2M sy-vline 
WA_DFKKCOMA_STR-MG2BL sy-vline 
WA_DFKKCOMA_STR-MG2TY sy-vline 
WA_DFKKCOMA_STR-MGE3M sy-vline 
WA_DFKKCOMA_STR-MG3BL sy-vline 
WA_DFKKCOMA_STR-MG3TY sy-vline 
WA_DFKKCOMA_STR-BUKRS sy-vline 
WA_DFKKCOMA_STR-WAERS sy-vline 
WA_DFKKCOMA_STR-FAEDN sy-vline 
WA_DFKKCOMA_STR-NRZAS sy-vline 
WA_DFKKCOMA_STR-XMSTO sy-vline 
WA_DFKKCOMA_STR-MSALM sy-vline 
WA_DFKKCOMA_STR-MDRKDC sy-vline 
WA_DFKKCOMA_STR-XERIN sy-vline 
WA_DFKKCOMA_STR-MAHNN sy-vline      INTO ld_text SEPARATED BY SPACE.

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