ABAP Select data from SAP table VMETVOR into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VMETVOR 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 VMETVOR. 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 VMETVOR 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_VMETVOR TYPE STANDARD TABLE OF VMETVOR,
      WA_VMETVOR TYPE VMETVOR,
      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: <VMETVOR> TYPE VMETVOR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VMETVOR
*  INTO TABLE @DATA(IT_VMETVOR2).
*--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_VMETVOR INDEX 1 INTO DATA(WA_VMETVOR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VMETVOR>-MANDT = 1.
<VMETVOR>-MEINN = 1.
<VMETVOR>-MERNN = 1.
<VMETVOR>-VORZZ = 1.
<VMETVOR>-READ_FORM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VMETVOR-FORM_MODUL, sy-vline,
  WA_VMETVOR-PRUEFUNG, sy-vline,
  WA_VMETVOR-RICHTUNG, sy-vline,
  WA_VMETVOR-PARZZ, sy-vline,
  WA_VMETVOR-ATWRT, sy-vline,
  WA_VMETVOR-PAHSC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VMETVOR 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_VMETVOR 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_VMETVOR INTO WA_VMETVOR.


*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 ATINN, internal->external for field MERNN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_VMETVOR-MERNN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VMETVOR-MERNN.
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_VMETVOR_STR, 
MANDT TYPE STRING,
MEINN TYPE STRING,
MERNN TYPE STRING,
VORZZ TYPE STRING,
READ_FORM TYPE STRING,
FORM_MODUL TYPE STRING,
PRUEFUNG TYPE STRING,
RICHTUNG TYPE STRING,
PARZZ TYPE STRING,
ATWRT TYPE STRING,
PAHSC TYPE STRING,
PAHER TYPE STRING,
PAHE2 TYPE STRING,
PAHNR TYPE STRING,
ATNAM TYPE STRING,
ATBEZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VMETVOR_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_VMETVOR_STR-MANDT sy-vline 
WA_VMETVOR_STR-MEINN sy-vline 
WA_VMETVOR_STR-MERNN sy-vline 
WA_VMETVOR_STR-VORZZ sy-vline 
WA_VMETVOR_STR-READ_FORM sy-vline 
WA_VMETVOR_STR-FORM_MODUL sy-vline 
WA_VMETVOR_STR-PRUEFUNG sy-vline 
WA_VMETVOR_STR-RICHTUNG sy-vline 
WA_VMETVOR_STR-PARZZ sy-vline 
WA_VMETVOR_STR-ATWRT sy-vline 
WA_VMETVOR_STR-PAHSC sy-vline 
WA_VMETVOR_STR-PAHER sy-vline 
WA_VMETVOR_STR-PAHE2 sy-vline 
WA_VMETVOR_STR-PAHNR sy-vline 
WA_VMETVOR_STR-ATNAM sy-vline 
WA_VMETVOR_STR-ATBEZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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