ABAP Select data from SAP table MDCV_V_VFAPW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDCV_V_VFAPW
*  INTO TABLE @DATA(IT_MDCV_V_VFAPW2).
*--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_MDCV_V_VFAPW INDEX 1 INTO DATA(WA_MDCV_V_VFAPW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDCV_V_VFAPW>-MANDT = 1.
<MDCV_V_VFAPW>-MATNR = 1.
<MDCV_V_VFAPW>-PWWRK = 1.
<MDCV_V_VFAPW>-AUFNR = 1.
<MDCV_V_VFAPW>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDCV_V_VFAPW-PLWRK, sy-vline,
  WA_MDCV_V_VFAPW-LGORT, sy-vline,
  WA_MDCV_V_VFAPW-AFTYP, sy-vline,
  WA_MDCV_V_VFAPW-AFART, sy-vline,
  WA_MDCV_V_VFAPW-DNREL, sy-vline,
  WA_MDCV_V_VFAPW-DFREI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDCV_V_VFAPW 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_MDCV_V_VFAPW 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_MDCV_V_VFAPW INTO WA_MDCV_V_VFAPW.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MDCV_V_VFAPW-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCV_V_VFAPW-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MDCV_V_VFAPW-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCV_V_VFAPW-PROJN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDCV_V_VFAPW-AMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCV_V_VFAPW-AMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDCV_V_VFAPW-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCV_V_VFAPW-MEINS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field QUNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDCV_V_VFAPW-QUNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDCV_V_VFAPW-QUNUM.
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_MDCV_V_VFAPW_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
PWWRK TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
PLWRK TYPE STRING,
LGORT TYPE STRING,
AFTYP TYPE STRING,
AFART TYPE STRING,
DNREL TYPE STRING,
DFREI TYPE STRING,
ELIKZ TYPE STRING,
PEDTR TYPE STRING,
PSTTR TYPE STRING,
WEBAZ TYPE STRING,
SERNR TYPE STRING,
CUOBJ TYPE STRING,
KNTTP TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
PROJN TYPE STRING,
GSMNG TYPE STRING,
WEMNG TYPE STRING,
PAMNG TYPE STRING,
IAMNG TYPE STRING,
AMEIN TYPE STRING,
MEINS TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
BESKZ TYPE STRING,
SOBES TYPE STRING,
WEPOS TYPE STRING,
SAFNR TYPE STRING,
VERID TYPE STRING,
VERTO TYPE STRING,
QUNUM TYPE STRING,
QUPOS TYPE STRING,
ARSNR TYPE STRING,
ARSPS TYPE STRING,
NDISR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDCV_V_VFAPW_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_MDCV_V_VFAPW_STR-MANDT sy-vline 
WA_MDCV_V_VFAPW_STR-MATNR sy-vline 
WA_MDCV_V_VFAPW_STR-PWWRK sy-vline 
WA_MDCV_V_VFAPW_STR-AUFNR sy-vline 
WA_MDCV_V_VFAPW_STR-POSNR sy-vline 
WA_MDCV_V_VFAPW_STR-PLWRK sy-vline 
WA_MDCV_V_VFAPW_STR-LGORT sy-vline 
WA_MDCV_V_VFAPW_STR-AFTYP sy-vline 
WA_MDCV_V_VFAPW_STR-AFART sy-vline 
WA_MDCV_V_VFAPW_STR-DNREL sy-vline 
WA_MDCV_V_VFAPW_STR-DFREI sy-vline 
WA_MDCV_V_VFAPW_STR-ELIKZ sy-vline 
WA_MDCV_V_VFAPW_STR-PEDTR sy-vline 
WA_MDCV_V_VFAPW_STR-PSTTR sy-vline 
WA_MDCV_V_VFAPW_STR-WEBAZ sy-vline 
WA_MDCV_V_VFAPW_STR-SERNR sy-vline 
WA_MDCV_V_VFAPW_STR-CUOBJ sy-vline 
WA_MDCV_V_VFAPW_STR-KNTTP sy-vline 
WA_MDCV_V_VFAPW_STR-SOBKZ sy-vline 
WA_MDCV_V_VFAPW_STR-KZVBR sy-vline 
WA_MDCV_V_VFAPW_STR-KDAUF sy-vline 
WA_MDCV_V_VFAPW_STR-KDPOS sy-vline 
WA_MDCV_V_VFAPW_STR-KDEIN sy-vline 
WA_MDCV_V_VFAPW_STR-PROJN sy-vline 
WA_MDCV_V_VFAPW_STR-GSMNG sy-vline 
WA_MDCV_V_VFAPW_STR-WEMNG sy-vline 
WA_MDCV_V_VFAPW_STR-PAMNG sy-vline 
WA_MDCV_V_VFAPW_STR-IAMNG sy-vline 
WA_MDCV_V_VFAPW_STR-AMEIN sy-vline 
WA_MDCV_V_VFAPW_STR-MEINS sy-vline 
WA_MDCV_V_VFAPW_STR-UMREZ sy-vline 
WA_MDCV_V_VFAPW_STR-UMREN sy-vline 
WA_MDCV_V_VFAPW_STR-BESKZ sy-vline 
WA_MDCV_V_VFAPW_STR-SOBES sy-vline 
WA_MDCV_V_VFAPW_STR-WEPOS sy-vline 
WA_MDCV_V_VFAPW_STR-SAFNR sy-vline 
WA_MDCV_V_VFAPW_STR-VERID sy-vline 
WA_MDCV_V_VFAPW_STR-VERTO sy-vline 
WA_MDCV_V_VFAPW_STR-QUNUM sy-vline 
WA_MDCV_V_VFAPW_STR-QUPOS sy-vline 
WA_MDCV_V_VFAPW_STR-ARSNR sy-vline 
WA_MDCV_V_VFAPW_STR-ARSPS sy-vline 
WA_MDCV_V_VFAPW_STR-NDISR sy-vline      INTO ld_text SEPARATED BY SPACE.

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