ABAP Select data from SAP table KOMLFPEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMLFPEX
*  INTO TABLE @DATA(IT_KOMLFPEX2).
*--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_KOMLFPEX INDEX 1 INTO DATA(WA_KOMLFPEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMLFPEX>-WBELN = 1.
<KOMLFPEX>-POSNR = 1.
<KOMLFPEX>-KOLIF = 1.
<KOMLFPEX>-LTSNR = 1.
<KOMLFPEX>-MWSKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMLFPEX-PRSDT, sy-vline,
  WA_KOMLFPEX-MENGE, sy-vline,
  WA_KOMLFPEX-NETPR, sy-vline,
  WA_KOMLFPEX-PEINH, sy-vline,
  WA_KOMLFPEX-WFKME, sy-vline,
  WA_KOMLFPEX-UMREZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMLFPEX 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_KOMLFPEX 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_KOMLFPEX INTO WA_KOMLFPEX.


*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_KOMLFPEX-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFPEX-WBELN.
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_KOMLFPEX_STR, 
WBELN TYPE STRING,
POSNR TYPE STRING,
KOLIF TYPE STRING,
LTSNR TYPE STRING,
MWSKZ TYPE STRING,
PRSDT TYPE STRING,
MENGE TYPE STRING,
NETPR TYPE STRING,
PEINH TYPE STRING,
WFKME TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
SKTOF TYPE STRING,
WBELNV TYPE STRING,
POSNRV TYPE STRING,
LFTYPV TYPE STRING,
AKTNR TYPE STRING,
LFGRU TYPE STRING,
ARKTX TYPE STRING,
TXJCD TYPE STRING,
EBONF TYPE STRING,
BWTAR TYPE STRING,
BWTTY TYPE STRING,
EKKOL TYPE STRING,
NTGEW TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
KOSTL TYPE STRING,
PRCTR TYPE STRING,
GSBER TYPE STRING,
ANZPU TYPE STRING,
PUNEI TYPE STRING,
BONUS TYPE STRING,
EBON2 TYPE STRING,
EBON3 TYPE STRING,
ITEMCAT TYPE STRING,
CONTRACT TYPE STRING,
CONTRACT_ITEM TYPE STRING,
CONTRACT_TYPE TYPE STRING,
IDNLF TYPE STRING,
AUFNR TYPE STRING,
FBUDA TYPE STRING,
UPDKZ TYPE STRING,
DUMMY_WBRP_INCL_EEW_PS TYPE STRING,
CWM_MENGE TYPE STRING,
CWM_MEINS TYPE STRING,
REF_NUMBER TYPE STRING,
REF_ITEM_NUMBER TYPE STRING,
REF_TYPE TYPE STRING,
IDNLF_TYPE TYPE STRING,
WEIGHT_VOLUME TYPE STRING,
PS_PSP_PNR TYPE STRING,
INCO1_P TYPE STRING,
INCO2_P TYPE STRING,
INCOV_P TYPE STRING,
INCO2_L_P TYPE STRING,
INCO3_L_P TYPE STRING,
IV_CHECK_TYPE_I TYPE STRING,
PROVG TYPE STRING,
KONDM TYPE STRING,
REBATE_GRP TYPE STRING,
MVGR1 TYPE STRING,
MVGR2 TYPE STRING,
MVGR3 TYPE STRING,
MVGR4 TYPE STRING,
MVGR5 TYPE STRING,
TAX_COUNTRY TYPE STRING,
CHARG TYPE STRING,
KOWRR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMLFPEX_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_KOMLFPEX_STR-WBELN sy-vline 
WA_KOMLFPEX_STR-POSNR sy-vline 
WA_KOMLFPEX_STR-KOLIF sy-vline 
WA_KOMLFPEX_STR-LTSNR sy-vline 
WA_KOMLFPEX_STR-MWSKZ sy-vline 
WA_KOMLFPEX_STR-PRSDT sy-vline 
WA_KOMLFPEX_STR-MENGE sy-vline 
WA_KOMLFPEX_STR-NETPR sy-vline 
WA_KOMLFPEX_STR-PEINH sy-vline 
WA_KOMLFPEX_STR-WFKME sy-vline 
WA_KOMLFPEX_STR-UMREZ sy-vline 
WA_KOMLFPEX_STR-UMREN sy-vline 
WA_KOMLFPEX_STR-SKTOF sy-vline 
WA_KOMLFPEX_STR-WBELNV sy-vline 
WA_KOMLFPEX_STR-POSNRV sy-vline 
WA_KOMLFPEX_STR-LFTYPV sy-vline 
WA_KOMLFPEX_STR-AKTNR sy-vline 
WA_KOMLFPEX_STR-LFGRU sy-vline 
WA_KOMLFPEX_STR-ARKTX sy-vline 
WA_KOMLFPEX_STR-TXJCD sy-vline 
WA_KOMLFPEX_STR-EBONF sy-vline 
WA_KOMLFPEX_STR-BWTAR sy-vline 
WA_KOMLFPEX_STR-BWTTY sy-vline 
WA_KOMLFPEX_STR-EKKOL sy-vline 
WA_KOMLFPEX_STR-NTGEW sy-vline 
WA_KOMLFPEX_STR-BRGEW sy-vline 
WA_KOMLFPEX_STR-GEWEI sy-vline 
WA_KOMLFPEX_STR-VOLUM sy-vline 
WA_KOMLFPEX_STR-VOLEH sy-vline 
WA_KOMLFPEX_STR-KOSTL sy-vline 
WA_KOMLFPEX_STR-PRCTR sy-vline 
WA_KOMLFPEX_STR-GSBER sy-vline 
WA_KOMLFPEX_STR-ANZPU sy-vline 
WA_KOMLFPEX_STR-PUNEI sy-vline 
WA_KOMLFPEX_STR-BONUS sy-vline 
WA_KOMLFPEX_STR-EBON2 sy-vline 
WA_KOMLFPEX_STR-EBON3 sy-vline 
WA_KOMLFPEX_STR-ITEMCAT sy-vline 
WA_KOMLFPEX_STR-CONTRACT sy-vline 
WA_KOMLFPEX_STR-CONTRACT_ITEM sy-vline 
WA_KOMLFPEX_STR-CONTRACT_TYPE sy-vline 
WA_KOMLFPEX_STR-IDNLF sy-vline 
WA_KOMLFPEX_STR-AUFNR sy-vline 
WA_KOMLFPEX_STR-FBUDA sy-vline 
WA_KOMLFPEX_STR-UPDKZ sy-vline 
WA_KOMLFPEX_STR-DUMMY_WBRP_INCL_EEW_PS sy-vline 
WA_KOMLFPEX_STR-CWM_MENGE sy-vline 
WA_KOMLFPEX_STR-CWM_MEINS sy-vline 
WA_KOMLFPEX_STR-REF_NUMBER sy-vline 
WA_KOMLFPEX_STR-REF_ITEM_NUMBER sy-vline 
WA_KOMLFPEX_STR-REF_TYPE sy-vline 
WA_KOMLFPEX_STR-IDNLF_TYPE sy-vline 
WA_KOMLFPEX_STR-WEIGHT_VOLUME sy-vline 
WA_KOMLFPEX_STR-PS_PSP_PNR sy-vline 
WA_KOMLFPEX_STR-INCO1_P sy-vline 
WA_KOMLFPEX_STR-INCO2_P sy-vline 
WA_KOMLFPEX_STR-INCOV_P sy-vline 
WA_KOMLFPEX_STR-INCO2_L_P sy-vline 
WA_KOMLFPEX_STR-INCO3_L_P sy-vline 
WA_KOMLFPEX_STR-IV_CHECK_TYPE_I sy-vline 
WA_KOMLFPEX_STR-PROVG sy-vline 
WA_KOMLFPEX_STR-KONDM sy-vline 
WA_KOMLFPEX_STR-REBATE_GRP sy-vline 
WA_KOMLFPEX_STR-MVGR1 sy-vline 
WA_KOMLFPEX_STR-MVGR2 sy-vline 
WA_KOMLFPEX_STR-MVGR3 sy-vline 
WA_KOMLFPEX_STR-MVGR4 sy-vline 
WA_KOMLFPEX_STR-MVGR5 sy-vline 
WA_KOMLFPEX_STR-TAX_COUNTRY sy-vline 
WA_KOMLFPEX_STR-CHARG sy-vline 
WA_KOMLFPEX_STR-KOWRR sy-vline      INTO ld_text SEPARATED BY SPACE.

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