ABAP Select data from SAP table KOMLFK_LI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMLFK_LI
*  INTO TABLE @DATA(IT_KOMLFK_LI2).
*--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_KOMLFK_LI INDEX 1 INTO DATA(WA_KOMLFK_LI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMLFK_LI>-WBELN = 1.
<KOMLFK_LI>-LFART = 1.
<KOMLFK_LI>-LFART_TXT = 1.
<KOMLFK_LI>-LFTYP = 1.
<KOMLFK_LI>-VTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMLFK_LI-WFDAT, sy-vline,
  WA_KOMLFK_LI-WFDAT_RL, sy-vline,
  WA_KOMLFK_LI-EKORG, sy-vline,
  WA_KOMLFK_LI-EKGRP, sy-vline,
  WA_KOMLFK_LI-BUKRS, sy-vline,
  WA_KOMLFK_LI-LIFRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMLFK_LI 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_KOMLFK_LI 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_KOMLFK_LI INTO WA_KOMLFK_LI.


*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_KOMLFK_LI-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFK_LI-WBELN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LIFNR_FI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMLFK_LI-LIFNR_FI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFK_LI-LIFNR_FI.
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_KOMLFK_LI_STR, 
WBELN TYPE STRING,
LFART TYPE STRING,
LFART_TXT TYPE STRING,
LFTYP TYPE STRING,
VTEXT TYPE STRING,
WFDAT TYPE STRING,
WFDAT_RL TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
BUKRS TYPE STRING,
LIFRE TYPE STRING,
LIF_NAME1 TYPE STRING,
LNRZB TYPE STRING,
LZB_NAME1 TYPE STRING,
WAERL TYPE STRING,
NETWR TYPE STRING,
MWSBK TYPE STRING,
BRTWR TYPE STRING,
RFBSK TYPE STRING,
RFBSK_TXT TYPE STRING,
ZTERM TYPE STRING,
ZLSCH TYPE STRING,
BLDAT TYPE STRING,
ZUONR TYPE STRING,
XBLNR TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
ARCHIV TYPE STRING,
SELKZ TYPE STRING,
ADRNR_RE TYPE STRING,
ADDR_TYPE_RE TYPE STRING,
ADRNP_RE TYPE STRING,
ADRNR_RS TYPE STRING,
ADRNR_RG TYPE STRING,
ADRNR_AZ TYPE STRING,
LIFNR_FI TYPE STRING,
LIFNR_FI_NAME1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMLFK_LI_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_KOMLFK_LI_STR-WBELN sy-vline 
WA_KOMLFK_LI_STR-LFART sy-vline 
WA_KOMLFK_LI_STR-LFART_TXT sy-vline 
WA_KOMLFK_LI_STR-LFTYP sy-vline 
WA_KOMLFK_LI_STR-VTEXT sy-vline 
WA_KOMLFK_LI_STR-WFDAT sy-vline 
WA_KOMLFK_LI_STR-WFDAT_RL sy-vline 
WA_KOMLFK_LI_STR-EKORG sy-vline 
WA_KOMLFK_LI_STR-EKGRP sy-vline 
WA_KOMLFK_LI_STR-BUKRS sy-vline 
WA_KOMLFK_LI_STR-LIFRE sy-vline 
WA_KOMLFK_LI_STR-LIF_NAME1 sy-vline 
WA_KOMLFK_LI_STR-LNRZB sy-vline 
WA_KOMLFK_LI_STR-LZB_NAME1 sy-vline 
WA_KOMLFK_LI_STR-WAERL sy-vline 
WA_KOMLFK_LI_STR-NETWR sy-vline 
WA_KOMLFK_LI_STR-MWSBK sy-vline 
WA_KOMLFK_LI_STR-BRTWR sy-vline 
WA_KOMLFK_LI_STR-RFBSK sy-vline 
WA_KOMLFK_LI_STR-RFBSK_TXT sy-vline 
WA_KOMLFK_LI_STR-ZTERM sy-vline 
WA_KOMLFK_LI_STR-ZLSCH sy-vline 
WA_KOMLFK_LI_STR-BLDAT sy-vline 
WA_KOMLFK_LI_STR-ZUONR sy-vline 
WA_KOMLFK_LI_STR-XBLNR sy-vline 
WA_KOMLFK_LI_STR-ERDAT sy-vline 
WA_KOMLFK_LI_STR-ERNAM sy-vline 
WA_KOMLFK_LI_STR-ARCHIV sy-vline 
WA_KOMLFK_LI_STR-SELKZ sy-vline 
WA_KOMLFK_LI_STR-ADRNR_RE sy-vline 
WA_KOMLFK_LI_STR-ADDR_TYPE_RE sy-vline 
WA_KOMLFK_LI_STR-ADRNP_RE sy-vline 
WA_KOMLFK_LI_STR-ADRNR_RS sy-vline 
WA_KOMLFK_LI_STR-ADRNR_RG sy-vline 
WA_KOMLFK_LI_STR-ADRNR_AZ sy-vline 
WA_KOMLFK_LI_STR-LIFNR_FI sy-vline 
WA_KOMLFK_LI_STR-LIFNR_FI_NAME1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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