ABAP Select data from SAP table VIFINTERN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIFINTERN
*  INTO TABLE @DATA(IT_VIFINTERN2).
*--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_VIFINTERN INDEX 1 INTO DATA(WA_VIFINTERN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIFINTERN>-MANDT = 1.
<VIFINTERN>-INTRENO = 1.
<VIFINTERN>-PARTID = 1.
<VIFINTERN>-KENNZEICHEN = 1.
<VIFINTERN>-LFDNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIFINTERN-NUTZUNGSART, sy-vline,
  WA_VIFINTERN-UNTERNUTZUNGSART, sy-vline,
  WA_VIFINTERN-FLAECHE, sy-vline,
  WA_VIFINTERN-EINHEIT, sy-vline,
  WA_VIFINTERN-BODENKLASSE, sy-vline,
  WA_VIFINTERN-ZUSTANDSSTUFE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIFINTERN 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_VIFINTERN 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_VIFINTERN INTO WA_VIFINTERN.


*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 CUNIT, internal->external for field EINHEIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VIFINTERN-EINHEIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIFINTERN-EINHEIT.
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_VIFINTERN_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
PARTID TYPE STRING,
KENNZEICHEN TYPE STRING,
LFDNR TYPE STRING,
NUTZUNGSART TYPE STRING,
UNTERNUTZUNGSART TYPE STRING,
FLAECHE TYPE STRING,
EINHEIT TYPE STRING,
BODENKLASSE TYPE STRING,
ZUSTANDSSTUFE TYPE STRING,
BODENART TYPE STRING,
EMZ TYPE STRING,
BETRIEBSNOTW TYPE STRING,
GUELTIG_VON TYPE STRING,
GUELTIG_BIS TYPE STRING,
NART_KAT TYPE STRING,
GRUPPE TYPE STRING,
REALISIERUNG_AB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIFINTERN_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_VIFINTERN_STR-MANDT sy-vline 
WA_VIFINTERN_STR-INTRENO sy-vline 
WA_VIFINTERN_STR-PARTID sy-vline 
WA_VIFINTERN_STR-KENNZEICHEN sy-vline 
WA_VIFINTERN_STR-LFDNR sy-vline 
WA_VIFINTERN_STR-NUTZUNGSART sy-vline 
WA_VIFINTERN_STR-UNTERNUTZUNGSART sy-vline 
WA_VIFINTERN_STR-FLAECHE sy-vline 
WA_VIFINTERN_STR-EINHEIT sy-vline 
WA_VIFINTERN_STR-BODENKLASSE sy-vline 
WA_VIFINTERN_STR-ZUSTANDSSTUFE sy-vline 
WA_VIFINTERN_STR-BODENART sy-vline 
WA_VIFINTERN_STR-EMZ sy-vline 
WA_VIFINTERN_STR-BETRIEBSNOTW sy-vline 
WA_VIFINTERN_STR-GUELTIG_VON sy-vline 
WA_VIFINTERN_STR-GUELTIG_BIS sy-vline 
WA_VIFINTERN_STR-NART_KAT sy-vline 
WA_VIFINTERN_STR-GRUPPE sy-vline 
WA_VIFINTERN_STR-REALISIERUNG_AB sy-vline      INTO ld_text SEPARATED BY SPACE.

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