ABAP Select data from SAP table V_N1VPST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_N1VPST 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 V_N1VPST. 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 V_N1VPST 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_V_N1VPST TYPE STANDARD TABLE OF V_N1VPST,
      WA_V_N1VPST TYPE V_N1VPST,
      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: <V_N1VPST> TYPE V_N1VPST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_N1VPST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_N1VPST
  INTO TABLE IT_V_N1VPST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_N1VPST
*  INTO TABLE @DATA(IT_V_N1VPST2).
*--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_V_N1VPST INDEX 1 INTO DATA(WA_V_N1VPST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_N1VPST ASSIGNING <V_N1VPST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_N1VPST>-MANDT = 1.
<V_N1VPST>-VPPID = 1.
<V_N1VPST>-DTTYP = 1.
<V_N1VPST>-LEN1 = 1.
<V_N1VPST>-LEN2 = 1.

ENDLOOP.

LOOP AT IT_V_N1VPST INTO WA_V_N1VPST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_N1VPST-VALMOD, sy-vline,
  WA_V_N1VPST-WERTOGR, sy-vline,
  WA_V_N1VPST-WERTUGR, sy-vline,
  WA_V_N1VPST-WERTMAX, sy-vline,
  WA_V_N1VPST-WERTMIN, sy-vline,
  WA_V_N1VPST-VPARENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_N1VPST 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_V_N1VPST 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_V_N1VPST INTO WA_V_N1VPST.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_N1VPST_STR, 
MANDT TYPE STRING,
VPPID TYPE STRING,
DTTYP TYPE STRING,
LEN1 TYPE STRING,
LEN2 TYPE STRING,
VALMOD TYPE STRING,
WERTOGR TYPE STRING,
WERTUGR TYPE STRING,
WERTMAX TYPE STRING,
WERTMIN TYPE STRING,
VPARENT TYPE STRING,
VERB TYPE STRING,
BILFAKTOR TYPE STRING,
AGGRFKT TYPE STRING,
WERTNORM TYPE STRING,
WERTMAXD TYPE STRING,
WERTMIND TYPE STRING,
VFARBE TYPE STRING,
HFARBE TYPE STRING,
SYMBOL TYPE STRING,
SWEITE TYPE STRING,
DISPTXT TYPE STRING,
DISPGRAF TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
KBEZ TYPE STRING,
MBEZ TYPE STRING,
LBEZ TYPE STRING,
LGTXT TYPE STRING,
EHKBEZ TYPE STRING,
EHBEZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_N1VPST_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_V_N1VPST_STR-MANDT sy-vline 
WA_V_N1VPST_STR-VPPID sy-vline 
WA_V_N1VPST_STR-DTTYP sy-vline 
WA_V_N1VPST_STR-LEN1 sy-vline 
WA_V_N1VPST_STR-LEN2 sy-vline 
WA_V_N1VPST_STR-VALMOD sy-vline 
WA_V_N1VPST_STR-WERTOGR sy-vline 
WA_V_N1VPST_STR-WERTUGR sy-vline 
WA_V_N1VPST_STR-WERTMAX sy-vline 
WA_V_N1VPST_STR-WERTMIN sy-vline 
WA_V_N1VPST_STR-VPARENT sy-vline 
WA_V_N1VPST_STR-VERB sy-vline 
WA_V_N1VPST_STR-BILFAKTOR sy-vline 
WA_V_N1VPST_STR-AGGRFKT sy-vline 
WA_V_N1VPST_STR-WERTNORM sy-vline 
WA_V_N1VPST_STR-WERTMAXD sy-vline 
WA_V_N1VPST_STR-WERTMIND sy-vline 
WA_V_N1VPST_STR-VFARBE sy-vline 
WA_V_N1VPST_STR-HFARBE sy-vline 
WA_V_N1VPST_STR-SYMBOL sy-vline 
WA_V_N1VPST_STR-SWEITE sy-vline 
WA_V_N1VPST_STR-DISPTXT sy-vline 
WA_V_N1VPST_STR-DISPGRAF sy-vline 
WA_V_N1VPST_STR-ERDAT sy-vline 
WA_V_N1VPST_STR-ERUSR sy-vline 
WA_V_N1VPST_STR-UPDAT sy-vline 
WA_V_N1VPST_STR-UPUSR sy-vline 
WA_V_N1VPST_STR-LOEKZ sy-vline 
WA_V_N1VPST_STR-LOUSR sy-vline 
WA_V_N1VPST_STR-LODAT sy-vline 
WA_V_N1VPST_STR-KBEZ sy-vline 
WA_V_N1VPST_STR-MBEZ sy-vline 
WA_V_N1VPST_STR-LBEZ sy-vline 
WA_V_N1VPST_STR-LGTXT sy-vline 
WA_V_N1VPST_STR-EHKBEZ sy-vline 
WA_V_N1VPST_STR-EHBEZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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