ABAP Select data from SAP table VIFFLAECHEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIFFLAECHEN
*  INTO TABLE @DATA(IT_VIFFLAECHEN2).
*--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_VIFFLAECHEN INDEX 1 INTO DATA(WA_VIFFLAECHEN2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIFFLAECHEN-BUKRS, sy-vline,
  WA_VIFFLAECHEN-SWENR, sy-vline,
  WA_VIFFLAECHEN-BEMERKUNG, sy-vline,
  WA_VIFFLAECHEN-FLAECHE, sy-vline,
  WA_VIFFLAECHEN-EINHEIT, sy-vline,
  WA_VIFFLAECHEN-FLAECHE_ART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIFFLAECHEN 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_VIFFLAECHEN 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_VIFFLAECHEN INTO WA_VIFFLAECHEN.


*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 SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_VIFFLAECHEN-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIFFLAECHEN-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EINHEIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VIFFLAECHEN-EINHEIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIFFLAECHEN-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_VIFFLAECHEN_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
PARTID TYPE STRING,
FART TYPE STRING,
LFDNR TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
BEMERKUNG TYPE STRING,
FLAECHE TYPE STRING,
EINHEIT TYPE STRING,
FLAECHE_ART TYPE STRING,
GUELTIG_VON TYPE STRING,
GUELTIG_BIS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIFFLAECHEN_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_VIFFLAECHEN_STR-MANDT sy-vline 
WA_VIFFLAECHEN_STR-INTRENO sy-vline 
WA_VIFFLAECHEN_STR-PARTID sy-vline 
WA_VIFFLAECHEN_STR-FART sy-vline 
WA_VIFFLAECHEN_STR-LFDNR sy-vline 
WA_VIFFLAECHEN_STR-BUKRS sy-vline 
WA_VIFFLAECHEN_STR-SWENR sy-vline 
WA_VIFFLAECHEN_STR-BEMERKUNG sy-vline 
WA_VIFFLAECHEN_STR-FLAECHE sy-vline 
WA_VIFFLAECHEN_STR-EINHEIT sy-vline 
WA_VIFFLAECHEN_STR-FLAECHE_ART sy-vline 
WA_VIFFLAECHEN_STR-GUELTIG_VON sy-vline 
WA_VIFFLAECHEN_STR-GUELTIG_BIS sy-vline      INTO ld_text SEPARATED BY SPACE.

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