ABAP Select data from SAP table KOMLFCM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMLFCM
*  INTO TABLE @DATA(IT_KOMLFCM2).
*--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_KOMLFCM INDEX 1 INTO DATA(WA_KOMLFCM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMLFCM>-MANDT = 1.
<KOMLFCM>-WBELN = 1.
<KOMLFCM>-LNRZB = 1.
<KOMLFCM>-KUNRG = 1.
<KOMLFCM>-ZFBDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMLFCM-POSNR_CM, sy-vline,
  WA_KOMLFCM-RFBSK, sy-vline,
  WA_KOMLFCM-WAERL, sy-vline,
  WA_KOMLFCM-WKURS, sy-vline,
  WA_KOMLFCM-REBZG, sy-vline,
  WA_KOMLFCM-BRTWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMLFCM 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_KOMLFCM 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_KOMLFCM INTO WA_KOMLFCM.


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

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

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

*Conversion exit EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_KOMLFCM-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFCM-WKURS.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMLFCM-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFCM-AWSYS.
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_KOMLFCM_STR, 
MANDT TYPE STRING,
WBELN TYPE STRING,
LNRZB TYPE STRING,
KUNRG TYPE STRING,
ZFBDT TYPE STRING,
POSNR_CM TYPE STRING,
RFBSK TYPE STRING,
WAERL TYPE STRING,
WKURS TYPE STRING,
REBZG TYPE STRING,
BRTWR TYPE STRING,
SKFBT TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
ZTERM TYPE STRING,
ZBD1T TYPE STRING,
ZBD1P TYPE STRING,
ZBD2T TYPE STRING,
ZBD2P TYPE STRING,
ZBD3T TYPE STRING,
ZLSCH TYPE STRING,
FKSTO TYPE STRING,
PYCUR TYPE STRING,
PYAMT TYPE STRING,
WKURS_DAT TYPE STRING,
PRCTR TYPE STRING,
WSKTO TYPE STRING,
UPDKZ TYPE STRING,
FDGRP TYPE STRING,
FDLEV TYPE STRING,
FDTAG TYPE STRING,
FDWBT TYPE STRING,
FDDBT TYPE STRING,
AWSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMLFCM_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_KOMLFCM_STR-MANDT sy-vline 
WA_KOMLFCM_STR-WBELN sy-vline 
WA_KOMLFCM_STR-LNRZB sy-vline 
WA_KOMLFCM_STR-KUNRG sy-vline 
WA_KOMLFCM_STR-ZFBDT sy-vline 
WA_KOMLFCM_STR-POSNR_CM sy-vline 
WA_KOMLFCM_STR-RFBSK sy-vline 
WA_KOMLFCM_STR-WAERL sy-vline 
WA_KOMLFCM_STR-WKURS sy-vline 
WA_KOMLFCM_STR-REBZG sy-vline 
WA_KOMLFCM_STR-BRTWR sy-vline 
WA_KOMLFCM_STR-SKFBT sy-vline 
WA_KOMLFCM_STR-BUKRS sy-vline 
WA_KOMLFCM_STR-GSBER sy-vline 
WA_KOMLFCM_STR-ZTERM sy-vline 
WA_KOMLFCM_STR-ZBD1T sy-vline 
WA_KOMLFCM_STR-ZBD1P sy-vline 
WA_KOMLFCM_STR-ZBD2T sy-vline 
WA_KOMLFCM_STR-ZBD2P sy-vline 
WA_KOMLFCM_STR-ZBD3T sy-vline 
WA_KOMLFCM_STR-ZLSCH sy-vline 
WA_KOMLFCM_STR-FKSTO sy-vline 
WA_KOMLFCM_STR-PYCUR sy-vline 
WA_KOMLFCM_STR-PYAMT sy-vline 
WA_KOMLFCM_STR-WKURS_DAT sy-vline 
WA_KOMLFCM_STR-PRCTR sy-vline 
WA_KOMLFCM_STR-WSKTO sy-vline 
WA_KOMLFCM_STR-UPDKZ sy-vline 
WA_KOMLFCM_STR-FDGRP sy-vline 
WA_KOMLFCM_STR-FDLEV sy-vline 
WA_KOMLFCM_STR-FDTAG sy-vline 
WA_KOMLFCM_STR-FDWBT sy-vline 
WA_KOMLFCM_STR-FDDBT sy-vline 
WA_KOMLFCM_STR-AWSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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