ABAP Select data from SAP table KOMSDF into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KOMSDF 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 KOMSDF. 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 KOMSDF 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_KOMSDF TYPE STANDARD TABLE OF KOMSDF,
      WA_KOMSDF TYPE KOMSDF,
      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: <KOMSDF> TYPE KOMSDF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMSDF
*  INTO TABLE @DATA(IT_KOMSDF2).
*--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_KOMSDF INDEX 1 INTO DATA(WA_KOMSDF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMSDF>-SELECTED = 1.
<KOMSDF>-VBELN = 1.
<KOMSDF>-POSNR = 1.
<KOMSDF>-ERNAM = 1.
<KOMSDF>-FKART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMSDF-NETWR, sy-vline,
  WA_KOMSDF-WAERK, sy-vline,
  WA_KOMSDF-VKORG, sy-vline,
  WA_KOMSDF-VTWEG, sy-vline,
  WA_KOMSDF-LLAND, sy-vline,
  WA_KOMSDF-BZIRK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMSDF 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_KOMSDF 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_KOMSDF INTO WA_KOMSDF.


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

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

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

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KOMSDF-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMSDF-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KOMSDF-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMSDF-MATNR.
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_KOMSDF_STR, 
SELECTED TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
ERNAM TYPE STRING,
FKART TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
LLAND TYPE STRING,
BZIRK TYPE STRING,
KDGRP TYPE STRING,
KUNRG TYPE STRING,
KUNAG TYPE STRING,
FKTYP TYPE STRING,
FKDAT TYPE STRING,
VBTYP TYPE STRING,
FKIMG TYPE STRING,
VRKME TYPE STRING,
GSBER TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
MATNR TYPE STRING,
ARKTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMSDF_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_KOMSDF_STR-SELECTED sy-vline 
WA_KOMSDF_STR-VBELN sy-vline 
WA_KOMSDF_STR-POSNR sy-vline 
WA_KOMSDF_STR-ERNAM sy-vline 
WA_KOMSDF_STR-FKART sy-vline 
WA_KOMSDF_STR-NETWR sy-vline 
WA_KOMSDF_STR-WAERK sy-vline 
WA_KOMSDF_STR-VKORG sy-vline 
WA_KOMSDF_STR-VTWEG sy-vline 
WA_KOMSDF_STR-LLAND sy-vline 
WA_KOMSDF_STR-BZIRK sy-vline 
WA_KOMSDF_STR-KDGRP sy-vline 
WA_KOMSDF_STR-KUNRG sy-vline 
WA_KOMSDF_STR-KUNAG sy-vline 
WA_KOMSDF_STR-FKTYP sy-vline 
WA_KOMSDF_STR-FKDAT sy-vline 
WA_KOMSDF_STR-VBTYP sy-vline 
WA_KOMSDF_STR-FKIMG sy-vline 
WA_KOMSDF_STR-VRKME sy-vline 
WA_KOMSDF_STR-GSBER sy-vline 
WA_KOMSDF_STR-WERKS sy-vline 
WA_KOMSDF_STR-CHARG sy-vline 
WA_KOMSDF_STR-MATNR sy-vline 
WA_KOMSDF_STR-ARKTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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