ABAP Select data from SAP table VN1PRVKG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VN1PRVKG 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 VN1PRVKG. 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 VN1PRVKG 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_VN1PRVKG TYPE STANDARD TABLE OF VN1PRVKG,
      WA_VN1PRVKG TYPE VN1PRVKG,
      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: <VN1PRVKG> TYPE VN1PRVKG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VN1PRVKG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VN1PRVKG
  INTO TABLE IT_VN1PRVKG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VN1PRVKG
*  INTO TABLE @DATA(IT_VN1PRVKG2).
*--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_VN1PRVKG INDEX 1 INTO DATA(WA_VN1PRVKG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VN1PRVKG ASSIGNING <VN1PRVKG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VN1PRVKG>-MANDT = 1.
<VN1PRVKG>-TLNRID = 1.
<VN1PRVKG>-VKGID = 1.
<VN1PRVKG>-PATNR = 1.
<VN1PRVKG>-ORGID = 1.

ENDLOOP.

LOOP AT IT_VN1PRVKG INTO WA_VN1PRVKG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VN1PRVKG-ORGNAM, sy-vline,
  WA_VN1PRVKG-FALNR, sy-vline,
  WA_VN1PRVKG-KANAM, sy-vline,
  WA_VN1PRVKG-DITXT, sy-vline,
  WA_VN1PRVKG-WUZPI, sy-vline,
  WA_VN1PRVKG-WUMNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VN1PRVKG 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_VN1PRVKG 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_VN1PRVKG INTO WA_VN1PRVKG.


*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 ALPHA, internal->external for field TLNRID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRVKG-TLNRID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRVKG-TLNRID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRVKG-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRVKG-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRVKG-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRVKG-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRVKG-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRVKG-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WUMNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRVKG-WUMNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRVKG-WUMNT.
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_VN1PRVKG_STR, 
MANDT TYPE STRING,
TLNRID TYPE STRING,
VKGID TYPE STRING,
PATNR TYPE STRING,
ORGID TYPE STRING,
ORGNAM TYPE STRING,
FALNR TYPE STRING,
KANAM TYPE STRING,
DITXT TYPE STRING,
WUZPI TYPE STRING,
WUMNT TYPE STRING,
WUJHR TYPE STRING,
PBGDT TYPE STRING,
PBZT TYPE STRING,
BMVKG TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VN1PRVKG_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_VN1PRVKG_STR-MANDT sy-vline 
WA_VN1PRVKG_STR-TLNRID sy-vline 
WA_VN1PRVKG_STR-VKGID sy-vline 
WA_VN1PRVKG_STR-PATNR sy-vline 
WA_VN1PRVKG_STR-ORGID sy-vline 
WA_VN1PRVKG_STR-ORGNAM sy-vline 
WA_VN1PRVKG_STR-FALNR sy-vline 
WA_VN1PRVKG_STR-KANAM sy-vline 
WA_VN1PRVKG_STR-DITXT sy-vline 
WA_VN1PRVKG_STR-WUZPI sy-vline 
WA_VN1PRVKG_STR-WUMNT sy-vline 
WA_VN1PRVKG_STR-WUJHR sy-vline 
WA_VN1PRVKG_STR-PBGDT sy-vline 
WA_VN1PRVKG_STR-PBZT sy-vline 
WA_VN1PRVKG_STR-BMVKG sy-vline 
WA_VN1PRVKG_STR-ERDAT sy-vline 
WA_VN1PRVKG_STR-ERUSR sy-vline 
WA_VN1PRVKG_STR-UPDAT sy-vline 
WA_VN1PRVKG_STR-UPUSR sy-vline 
WA_VN1PRVKG_STR-STORN sy-vline 
WA_VN1PRVKG_STR-STUSR sy-vline 
WA_VN1PRVKG_STR-STDAT sy-vline 
WA_VN1PRVKG_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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