ABAP Select data from SAP table KOMLFK_PORTAL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KOMLFK_PORTAL 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_PORTAL. 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_PORTAL 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_PORTAL TYPE STANDARD TABLE OF KOMLFK_PORTAL,
      WA_KOMLFK_PORTAL TYPE KOMLFK_PORTAL,
      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_PORTAL> TYPE KOMLFK_PORTAL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMLFK_PORTAL
*  INTO TABLE @DATA(IT_KOMLFK_PORTAL2).
*--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_PORTAL INDEX 1 INTO DATA(WA_KOMLFK_PORTAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMLFK_PORTAL>-WBELN = 1.
<KOMLFK_PORTAL>-LFART = 1.
<KOMLFK_PORTAL>-LFART_TXT = 1.
<KOMLFK_PORTAL>-WFDAT = 1.
<KOMLFK_PORTAL>-BLDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMLFK_PORTAL-ERDAT, sy-vline,
  WA_KOMLFK_PORTAL-EKORG, sy-vline,
  WA_KOMLFK_PORTAL-EKGRP, sy-vline,
  WA_KOMLFK_PORTAL-VKORG, sy-vline,
  WA_KOMLFK_PORTAL-VTWEG, sy-vline,
  WA_KOMLFK_PORTAL-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMLFK_PORTAL 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_PORTAL 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_PORTAL INTO WA_KOMLFK_PORTAL.


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

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

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

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMLFK_PORTAL-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFK_PORTAL-KUNRG.
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_PORTAL_STR, 
WBELN TYPE STRING,
LFART TYPE STRING,
LFART_TXT TYPE STRING,
WFDAT TYPE STRING,
BLDAT TYPE STRING,
ERDAT TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
BUKRS TYPE STRING,
SPART TYPE STRING,
WAERL TYPE STRING,
NETWRD TYPE STRING,
MWSBKD TYPE STRING,
BRTWRD TYPE STRING,
NETWR TYPE STRING,
MWSBK TYPE STRING,
BRTWR TYPE STRING,
LIFRE TYPE STRING,
LIF_NAME1 TYPE STRING,
ZTERMD TYPE STRING,
ZBD1TD TYPE STRING,
ZBD1PD TYPE STRING,
ZBD2TD TYPE STRING,
ZBD2PD TYPE STRING,
ZBD3TD TYPE STRING,
VALDTD TYPE STRING,
VALTGD TYPE STRING,
KUNRE TYPE STRING,
KND_NAME1 TYPE STRING,
KUNRG TYPE STRING,
KRG_NAME1 TYPE STRING,
RFBSK TYPE STRING,
RFBSK_TXT TYPE STRING,
ZUONR TYPE STRING,
XBLNR TYPE STRING,
LFTYP TYPE STRING,
LFTYP_TXT TYPE STRING,
LFGRU TYPE STRING,
LFGRU_TXT TYPE STRING,
CLAIMSTATUS_LIGHT TYPE STRING,
CLAIMSTATUS TYPE STRING,
CLAIMSTATUS_TEXT TYPE STRING,
CLAIMSTATUS_ICON TYPE STRING,
RELEASE_STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMLFK_PORTAL_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_PORTAL_STR-WBELN sy-vline 
WA_KOMLFK_PORTAL_STR-LFART sy-vline 
WA_KOMLFK_PORTAL_STR-LFART_TXT sy-vline 
WA_KOMLFK_PORTAL_STR-WFDAT sy-vline 
WA_KOMLFK_PORTAL_STR-BLDAT sy-vline 
WA_KOMLFK_PORTAL_STR-ERDAT sy-vline 
WA_KOMLFK_PORTAL_STR-EKORG sy-vline 
WA_KOMLFK_PORTAL_STR-EKGRP sy-vline 
WA_KOMLFK_PORTAL_STR-VKORG sy-vline 
WA_KOMLFK_PORTAL_STR-VTWEG sy-vline 
WA_KOMLFK_PORTAL_STR-BUKRS sy-vline 
WA_KOMLFK_PORTAL_STR-SPART sy-vline 
WA_KOMLFK_PORTAL_STR-WAERL sy-vline 
WA_KOMLFK_PORTAL_STR-NETWRD sy-vline 
WA_KOMLFK_PORTAL_STR-MWSBKD sy-vline 
WA_KOMLFK_PORTAL_STR-BRTWRD sy-vline 
WA_KOMLFK_PORTAL_STR-NETWR sy-vline 
WA_KOMLFK_PORTAL_STR-MWSBK sy-vline 
WA_KOMLFK_PORTAL_STR-BRTWR sy-vline 
WA_KOMLFK_PORTAL_STR-LIFRE sy-vline 
WA_KOMLFK_PORTAL_STR-LIF_NAME1 sy-vline 
WA_KOMLFK_PORTAL_STR-ZTERMD sy-vline 
WA_KOMLFK_PORTAL_STR-ZBD1TD sy-vline 
WA_KOMLFK_PORTAL_STR-ZBD1PD sy-vline 
WA_KOMLFK_PORTAL_STR-ZBD2TD sy-vline 
WA_KOMLFK_PORTAL_STR-ZBD2PD sy-vline 
WA_KOMLFK_PORTAL_STR-ZBD3TD sy-vline 
WA_KOMLFK_PORTAL_STR-VALDTD sy-vline 
WA_KOMLFK_PORTAL_STR-VALTGD sy-vline 
WA_KOMLFK_PORTAL_STR-KUNRE sy-vline 
WA_KOMLFK_PORTAL_STR-KND_NAME1 sy-vline 
WA_KOMLFK_PORTAL_STR-KUNRG sy-vline 
WA_KOMLFK_PORTAL_STR-KRG_NAME1 sy-vline 
WA_KOMLFK_PORTAL_STR-RFBSK sy-vline 
WA_KOMLFK_PORTAL_STR-RFBSK_TXT sy-vline 
WA_KOMLFK_PORTAL_STR-ZUONR sy-vline 
WA_KOMLFK_PORTAL_STR-XBLNR sy-vline 
WA_KOMLFK_PORTAL_STR-LFTYP sy-vline 
WA_KOMLFK_PORTAL_STR-LFTYP_TXT sy-vline 
WA_KOMLFK_PORTAL_STR-LFGRU sy-vline 
WA_KOMLFK_PORTAL_STR-LFGRU_TXT sy-vline 
WA_KOMLFK_PORTAL_STR-CLAIMSTATUS_LIGHT sy-vline 
WA_KOMLFK_PORTAL_STR-CLAIMSTATUS sy-vline 
WA_KOMLFK_PORTAL_STR-CLAIMSTATUS_TEXT sy-vline 
WA_KOMLFK_PORTAL_STR-CLAIMSTATUS_ICON sy-vline 
WA_KOMLFK_PORTAL_STR-RELEASE_STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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