ABAP Select data from SAP table KOMKRW 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 KOMKRW 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 KOMKRW. 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 KOMKRW 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_KOMKRW TYPE STANDARD TABLE OF KOMKRW,
      WA_KOMKRW TYPE KOMKRW,
      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: <KOMKRW> TYPE KOMKRW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMKRW
*  INTO TABLE @DATA(IT_KOMKRW2).
*--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_KOMKRW INDEX 1 INTO DATA(WA_KOMKRW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMKRW>-CLMNO = 1.
<KOMKRW>-CLMTY = 1.
<KOMKRW>-REFDT = 1.
<KOMKRW>-REFNO = 1.
<KOMKRW>-OLDCN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMKRW-AUTNO, sy-vline,
  WA_KOMKRW-AUTNA, sy-vline,
  WA_KOMKRW-CLERK, sy-vline,
  WA_KOMKRW-RELTY, sy-vline,
  WA_KOMKRW-RELOB_EXT, sy-vline,
  WA_KOMKRW-RELOB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMKRW 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_KOMKRW 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_KOMKRW INTO WA_KOMKRW.


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

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

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

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_KOMKRW-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMKRW-PARVW.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GERNR, internal->external for field SERNO
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_KOMKRW-SERNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMKRW-SERNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field SERNO2
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_KOMKRW-SERNO2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMKRW-SERNO2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSK
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_KOMKRW-KURSK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMKRW-KURSK.
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_KOMKRW_STR, 
CLMNO TYPE STRING,
CLMTY TYPE STRING,
REFDT TYPE STRING,
REFNO TYPE STRING,
OLDCN TYPE STRING,
AUTNO TYPE STRING,
AUTNA TYPE STRING,
CLERK TYPE STRING,
RELTY TYPE STRING,
RELOB_EXT TYPE STRING,
RELOB TYPE STRING,
RELOT TYPE STRING,
RELDT TYPE STRING,
PARNR TYPE STRING,
PARVW TYPE STRING,
OBJNR TYPE STRING,
ASTATE TYPE STRING,
WERKS TYPE STRING,
QMNUM TYPE STRING,
LOG_HANDLE TYPE STRING,
LOG_MESSAGE TYPE STRING,
CLMGRP TYPE STRING,
RESULT_OUT_MWTY TYPE STRING,
RESULT_IN_MWTY TYPE STRING,
RELTY2 TYPE STRING,
RELOB_EXT2 TYPE STRING,
RELOB2 TYPE STRING,
SERNO TYPE STRING,
SERNO2 TYPE STRING,
CBACTIONDT TYPE STRING,
OR_DUMMY TYPE STRING,
CLOSE_DATE TYPE STRING,
ARCHIV_FLAG TYPE STRING,
VERSN TYPE STRING,
KATEG TYPE STRING,
REJCD TYPE STRING,
REFKT TYPE STRING,
REFNR TYPE STRING,
AKTIV TYPE STRING,
KNUMV TYPE STRING,
CRNCY TYPE STRING,
PRSDT TYPE STRING,
KURSK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMKRW_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_KOMKRW_STR-CLMNO sy-vline 
WA_KOMKRW_STR-CLMTY sy-vline 
WA_KOMKRW_STR-REFDT sy-vline 
WA_KOMKRW_STR-REFNO sy-vline 
WA_KOMKRW_STR-OLDCN sy-vline 
WA_KOMKRW_STR-AUTNO sy-vline 
WA_KOMKRW_STR-AUTNA sy-vline 
WA_KOMKRW_STR-CLERK sy-vline 
WA_KOMKRW_STR-RELTY sy-vline 
WA_KOMKRW_STR-RELOB_EXT sy-vline 
WA_KOMKRW_STR-RELOB sy-vline 
WA_KOMKRW_STR-RELOT sy-vline 
WA_KOMKRW_STR-RELDT sy-vline 
WA_KOMKRW_STR-PARNR sy-vline 
WA_KOMKRW_STR-PARVW sy-vline 
WA_KOMKRW_STR-OBJNR sy-vline 
WA_KOMKRW_STR-ASTATE sy-vline 
WA_KOMKRW_STR-WERKS sy-vline 
WA_KOMKRW_STR-QMNUM sy-vline 
WA_KOMKRW_STR-LOG_HANDLE sy-vline 
WA_KOMKRW_STR-LOG_MESSAGE sy-vline 
WA_KOMKRW_STR-CLMGRP sy-vline 
WA_KOMKRW_STR-RESULT_OUT_MWTY sy-vline 
WA_KOMKRW_STR-RESULT_IN_MWTY sy-vline 
WA_KOMKRW_STR-RELTY2 sy-vline 
WA_KOMKRW_STR-RELOB_EXT2 sy-vline 
WA_KOMKRW_STR-RELOB2 sy-vline 
WA_KOMKRW_STR-SERNO sy-vline 
WA_KOMKRW_STR-SERNO2 sy-vline 
WA_KOMKRW_STR-CBACTIONDT sy-vline 
WA_KOMKRW_STR-OR_DUMMY sy-vline 
WA_KOMKRW_STR-CLOSE_DATE sy-vline 
WA_KOMKRW_STR-ARCHIV_FLAG sy-vline 
WA_KOMKRW_STR-VERSN sy-vline 
WA_KOMKRW_STR-KATEG sy-vline 
WA_KOMKRW_STR-REJCD sy-vline 
WA_KOMKRW_STR-REFKT sy-vline 
WA_KOMKRW_STR-REFNR sy-vline 
WA_KOMKRW_STR-AKTIV sy-vline 
WA_KOMKRW_STR-KNUMV sy-vline 
WA_KOMKRW_STR-CRNCY sy-vline 
WA_KOMKRW_STR-PRSDT sy-vline 
WA_KOMKRW_STR-KURSK sy-vline      INTO ld_text SEPARATED BY SPACE.

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