ABAP Select data from SAP table KOMK2_FI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KOMK2_FI 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 KOMK2_FI. 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 KOMK2_FI 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_KOMK2_FI TYPE STANDARD TABLE OF KOMK2_FI,
      WA_KOMK2_FI TYPE KOMK2_FI,
      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: <KOMK2_FI> TYPE KOMK2_FI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KOMK2_FI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KOMK2_FI
  INTO TABLE IT_KOMK2_FI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMK2_FI
*  INTO TABLE @DATA(IT_KOMK2_FI2).
*--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_KOMK2_FI INDEX 1 INTO DATA(WA_KOMK2_FI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KOMK2_FI ASSIGNING <KOMK2_FI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMK2_FI>-BUKRS = 1.
<KOMK2_FI>-BELNR = 1.
<KOMK2_FI>-BSCHL = 1.
<KOMK2_FI>-GSBER = 1.
<KOMK2_FI>-MWSKZ = 1.

ENDLOOP.

LOOP AT IT_KOMK2_FI INTO WA_KOMK2_FI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMK2_FI-DMBTR, sy-vline,
  WA_KOMK2_FI-WRBTR, sy-vline,
  WA_KOMK2_FI-DMBE_1, sy-vline,
  WA_KOMK2_FI-DMBE_2, sy-vline,
  WA_KOMK2_FI-DMBE_3, sy-vline,
  WA_KOMK2_FI-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMK2_FI 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_KOMK2_FI 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_KOMK2_FI INTO WA_KOMK2_FI.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FILKD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-FILKD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-FILKD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-ADRNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBE2
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-DMBE2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-DMBE2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBE3
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_FI-DMBE3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_FI-DMBE3.
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_KOMK2_FI_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
BSCHL TYPE STRING,
GSBER TYPE STRING,
MWSKZ TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
DMBE_1 TYPE STRING,
DMBE_2 TYPE STRING,
DMBE_3 TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
FILKD TYPE STRING,
ZTERM TYPE STRING,
ZFBDT TYPE STRING,
SKFBT TYPE STRING,
MABER TYPE STRING,
MSCHL TYPE STRING,
MANSP TYPE STRING,
VBELN TYPE STRING,
ADRNR TYPE STRING,
STCEG TYPE STRING,
XEGDR TYPE STRING,
ZUONR TYPE STRING,
SGTXT TYPE STRING,
ZLSCH TYPE STRING,
DMBE2 TYPE STRING,
DMBE3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMK2_FI_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_KOMK2_FI_STR-BUKRS sy-vline 
WA_KOMK2_FI_STR-BELNR sy-vline 
WA_KOMK2_FI_STR-BSCHL sy-vline 
WA_KOMK2_FI_STR-GSBER sy-vline 
WA_KOMK2_FI_STR-MWSKZ sy-vline 
WA_KOMK2_FI_STR-DMBTR sy-vline 
WA_KOMK2_FI_STR-WRBTR sy-vline 
WA_KOMK2_FI_STR-DMBE_1 sy-vline 
WA_KOMK2_FI_STR-DMBE_2 sy-vline 
WA_KOMK2_FI_STR-DMBE_3 sy-vline 
WA_KOMK2_FI_STR-KUNNR sy-vline 
WA_KOMK2_FI_STR-LIFNR sy-vline 
WA_KOMK2_FI_STR-FILKD sy-vline 
WA_KOMK2_FI_STR-ZTERM sy-vline 
WA_KOMK2_FI_STR-ZFBDT sy-vline 
WA_KOMK2_FI_STR-SKFBT sy-vline 
WA_KOMK2_FI_STR-MABER sy-vline 
WA_KOMK2_FI_STR-MSCHL sy-vline 
WA_KOMK2_FI_STR-MANSP sy-vline 
WA_KOMK2_FI_STR-VBELN sy-vline 
WA_KOMK2_FI_STR-ADRNR sy-vline 
WA_KOMK2_FI_STR-STCEG sy-vline 
WA_KOMK2_FI_STR-XEGDR sy-vline 
WA_KOMK2_FI_STR-ZUONR sy-vline 
WA_KOMK2_FI_STR-SGTXT sy-vline 
WA_KOMK2_FI_STR-ZLSCH sy-vline 
WA_KOMK2_FI_STR-DMBE2 sy-vline 
WA_KOMK2_FI_STR-DMBE3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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