ABAP Select data from SAP table VLFM2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VLFM2 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 VLFM2. 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 VLFM2 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_VLFM2 TYPE STANDARD TABLE OF VLFM2,
      WA_VLFM2 TYPE VLFM2,
      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: <VLFM2> TYPE VLFM2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VLFM2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VLFM2
  INTO TABLE IT_VLFM2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VLFM2
*  INTO TABLE @DATA(IT_VLFM22).
*--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_VLFM2 INDEX 1 INTO DATA(WA_VLFM22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VLFM2 ASSIGNING <VLFM2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VLFM2>-MANDT = 1.
<VLFM2>-LIFNR = 1.
<VLFM2>-EKORG = 1.
<VLFM2>-LTSNR = 1.
<VLFM2>-WERKS = 1.

ENDLOOP.

LOOP AT IT_VLFM2 INTO WA_VLFM2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VLFM2-ERDAT, sy-vline,
  WA_VLFM2-ERNAM, sy-vline,
  WA_VLFM2-SPERM, sy-vline,
  WA_VLFM2-LOEVM, sy-vline,
  WA_VLFM2-LFABC, sy-vline,
  WA_VLFM2-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VLFM2 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_VLFM2 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_VLFM2 INTO WA_VLFM2.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLFM2-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLFM2-LIFNR.
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_VLFM2_STR, 
MANDT TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
LTSNR TYPE STRING,
WERKS TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
SPERM TYPE STRING,
LOEVM TYPE STRING,
LFABC TYPE STRING,
WAERS TYPE STRING,
VERKF TYPE STRING,
TELF1 TYPE STRING,
MINBW TYPE STRING,
ZTERM TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
WEBRE TYPE STRING,
KZABS TYPE STRING,
KALSK TYPE STRING,
KZAUT TYPE STRING,
EXPVZ TYPE STRING,
ZOLLA TYPE STRING,
MEPRF TYPE STRING,
EKGRP TYPE STRING,
XERSY TYPE STRING,
PLIFZ TYPE STRING,
MRPPP TYPE STRING,
LFRHY TYPE STRING,
LIBES TYPE STRING,
LIPRE TYPE STRING,
LISER TYPE STRING,
INCOV TYPE STRING,
INCO2_L TYPE STRING,
INCO3_L TYPE STRING,
WEORA TYPE STRING,
DISPO TYPE STRING,
BOIND TYPE STRING,
BSTAE TYPE STRING,
RDPRF TYPE STRING,
MEGRU TYPE STRING,
BOPNR TYPE STRING,
XERSR TYPE STRING,
ABUEB TYPE STRING,
PAPRF TYPE STRING,
XNBWY TYPE STRING,
LEBRE TYPE STRING,
BOLRE TYPE STRING,
UMSAE TYPE STRING,
UPPRS TYPE STRING,
TRANSPORT_CHAIN TYPE STRING,
STAGING_TIME TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VLFM2_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_VLFM2_STR-MANDT sy-vline 
WA_VLFM2_STR-LIFNR sy-vline 
WA_VLFM2_STR-EKORG sy-vline 
WA_VLFM2_STR-LTSNR sy-vline 
WA_VLFM2_STR-WERKS sy-vline 
WA_VLFM2_STR-ERDAT sy-vline 
WA_VLFM2_STR-ERNAM sy-vline 
WA_VLFM2_STR-SPERM sy-vline 
WA_VLFM2_STR-LOEVM sy-vline 
WA_VLFM2_STR-LFABC sy-vline 
WA_VLFM2_STR-WAERS sy-vline 
WA_VLFM2_STR-VERKF sy-vline 
WA_VLFM2_STR-TELF1 sy-vline 
WA_VLFM2_STR-MINBW sy-vline 
WA_VLFM2_STR-ZTERM sy-vline 
WA_VLFM2_STR-INCO1 sy-vline 
WA_VLFM2_STR-INCO2 sy-vline 
WA_VLFM2_STR-WEBRE sy-vline 
WA_VLFM2_STR-KZABS sy-vline 
WA_VLFM2_STR-KALSK sy-vline 
WA_VLFM2_STR-KZAUT sy-vline 
WA_VLFM2_STR-EXPVZ sy-vline 
WA_VLFM2_STR-ZOLLA sy-vline 
WA_VLFM2_STR-MEPRF sy-vline 
WA_VLFM2_STR-EKGRP sy-vline 
WA_VLFM2_STR-XERSY sy-vline 
WA_VLFM2_STR-PLIFZ sy-vline 
WA_VLFM2_STR-MRPPP sy-vline 
WA_VLFM2_STR-LFRHY sy-vline 
WA_VLFM2_STR-LIBES sy-vline 
WA_VLFM2_STR-LIPRE sy-vline 
WA_VLFM2_STR-LISER sy-vline 
WA_VLFM2_STR-INCOV sy-vline 
WA_VLFM2_STR-INCO2_L sy-vline 
WA_VLFM2_STR-INCO3_L sy-vline 
WA_VLFM2_STR-WEORA sy-vline 
WA_VLFM2_STR-DISPO sy-vline 
WA_VLFM2_STR-BOIND sy-vline 
WA_VLFM2_STR-BSTAE sy-vline 
WA_VLFM2_STR-RDPRF sy-vline 
WA_VLFM2_STR-MEGRU sy-vline 
WA_VLFM2_STR-BOPNR sy-vline 
WA_VLFM2_STR-XERSR sy-vline 
WA_VLFM2_STR-ABUEB sy-vline 
WA_VLFM2_STR-PAPRF sy-vline 
WA_VLFM2_STR-XNBWY sy-vline 
WA_VLFM2_STR-LEBRE sy-vline 
WA_VLFM2_STR-BOLRE sy-vline 
WA_VLFM2_STR-UMSAE sy-vline 
WA_VLFM2_STR-UPPRS sy-vline 
WA_VLFM2_STR-TRANSPORT_CHAIN sy-vline 
WA_VLFM2_STR-STAGING_TIME sy-vline 
WA_VLFM2_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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