ABAP Select data from SAP table DFKKCMK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKCMK
*  INTO TABLE @DATA(IT_DFKKCMK2).
*--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_DFKKCMK INDEX 1 INTO DATA(WA_DFKKCMK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKCMK>-MANDT = 1.
<DFKKCMK>-KEYS1 = 1.
<DFKKCMK>-KEYS2 = 1.
<DFKKCMK>-BUKRS = 1.
<DFKKCMK>-GSBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKCMK-HERKF, sy-vline,
  WA_DFKKCMK-HBKID, sy-vline,
  WA_DFKKCMK-HKTID, sy-vline,
  WA_DFKKCMK-PYMET, sy-vline,
  WA_DFKKCMK-BVRKO, sy-vline,
  WA_DFKKCMK-VALUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKCMK 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_DFKKCMK 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_DFKKCMK INTO WA_DFKKCMK.


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

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

*Conversion exit ALPHA, internal->external for field CHKTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKCMK-CHKTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKCMK-CHKTO.
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_DFKKCMK_STR, 
MANDT TYPE STRING,
KEYS1 TYPE STRING,
KEYS2 TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
HERKF TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
PYMET TYPE STRING,
BVRKO TYPE STRING,
VALUT TYPE STRING,
APPLK TYPE STRING,
BLART TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
WAERS TYPE STRING,
FIKEY TYPE STRING,
STASS TYPE STRING,
ANZPO TYPE STRING,
SUMMH TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
CHKFR TYPE STRING,
CHKTO TYPE STRING,
INFOF TYPE STRING,
KTSUH TYPE STRING,
KSUMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKCMK_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_DFKKCMK_STR-MANDT sy-vline 
WA_DFKKCMK_STR-KEYS1 sy-vline 
WA_DFKKCMK_STR-KEYS2 sy-vline 
WA_DFKKCMK_STR-BUKRS sy-vline 
WA_DFKKCMK_STR-GSBER sy-vline 
WA_DFKKCMK_STR-HERKF sy-vline 
WA_DFKKCMK_STR-HBKID sy-vline 
WA_DFKKCMK_STR-HKTID sy-vline 
WA_DFKKCMK_STR-PYMET sy-vline 
WA_DFKKCMK_STR-BVRKO sy-vline 
WA_DFKKCMK_STR-VALUT sy-vline 
WA_DFKKCMK_STR-APPLK sy-vline 
WA_DFKKCMK_STR-BLART sy-vline 
WA_DFKKCMK_STR-BUDAT sy-vline 
WA_DFKKCMK_STR-BLDAT sy-vline 
WA_DFKKCMK_STR-WAERS sy-vline 
WA_DFKKCMK_STR-FIKEY sy-vline 
WA_DFKKCMK_STR-STASS sy-vline 
WA_DFKKCMK_STR-ANZPO sy-vline 
WA_DFKKCMK_STR-SUMMH sy-vline 
WA_DFKKCMK_STR-ERNAM sy-vline 
WA_DFKKCMK_STR-ERDAT sy-vline 
WA_DFKKCMK_STR-ERTIM sy-vline 
WA_DFKKCMK_STR-AENAM sy-vline 
WA_DFKKCMK_STR-AEDAT sy-vline 
WA_DFKKCMK_STR-AETIM sy-vline 
WA_DFKKCMK_STR-CHKFR sy-vline 
WA_DFKKCMK_STR-CHKTO sy-vline 
WA_DFKKCMK_STR-INFOF sy-vline 
WA_DFKKCMK_STR-KTSUH sy-vline 
WA_DFKKCMK_STR-KSUMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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