ABAP Select data from SAP table VN1PRDOC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VN1PRDOC 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 VN1PRDOC. 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 VN1PRDOC 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_VN1PRDOC TYPE STANDARD TABLE OF VN1PRDOC,
      WA_VN1PRDOC TYPE VN1PRDOC,
      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: <VN1PRDOC> TYPE VN1PRDOC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VN1PRDOC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VN1PRDOC
  INTO TABLE IT_VN1PRDOC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VN1PRDOC
*  INTO TABLE @DATA(IT_VN1PRDOC2).
*--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_VN1PRDOC INDEX 1 INTO DATA(WA_VN1PRDOC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VN1PRDOC ASSIGNING <VN1PRDOC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VN1PRDOC>-MANDT = 1.
<VN1PRDOC>-TLNRID = 1.
<VN1PRDOC>-DOKAR = 1.
<VN1PRDOC>-DOKNR = 1.
<VN1PRDOC>-DOKVR = 1.

ENDLOOP.

LOOP AT IT_VN1PRDOC INTO WA_VN1PRDOC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VN1PRDOC-DOKTL, sy-vline,
  WA_VN1PRDOC-LFDDOK, sy-vline,
  WA_VN1PRDOC-PATNR, sy-vline,
  WA_VN1PRDOC-FALNR, sy-vline,
  WA_VN1PRDOC-ANFID, sy-vline,
  WA_VN1PRDOC-ORGDO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VN1PRDOC 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_VN1PRDOC 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_VN1PRDOC INTO WA_VN1PRDOC.


*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_VN1PRDOC-TLNRID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-TLNRID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGDO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-ORGDO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-ORGDO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGLA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-ORGLA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-ORGLA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MITARB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-MITARB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-MITARB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-LNRLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-LNRLS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEIST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN1PRDOC-LEIST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN1PRDOC-LEIST.
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_VN1PRDOC_STR, 
MANDT TYPE STRING,
TLNRID TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
LFDDOK TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
ANFID TYPE STRING,
ORGDO TYPE STRING,
ORGNAM TYPE STRING,
ORGLA TYPE STRING,
OLANAM TYPE STRING,
MITARB TYPE STRING,
MITNAM TYPE STRING,
DTID TYPE STRING,
DTVERS TYPE STRING,
DTBEZ TYPE STRING,
DTKB TYPE STRING,
BEZEB TYPE STRING,
MEDOK TYPE STRING,
DODAT TYPE STRING,
DOTIM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
UPUSR TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
LOTIM TYPE STRING,
PCODE TYPE STRING,
PCODETXT TYPE STRING,
LNRLS TYPE STRING,
LFDBEW TYPE STRING,
LEIST TYPE STRING,
LEITX TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VN1PRDOC_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_VN1PRDOC_STR-MANDT sy-vline 
WA_VN1PRDOC_STR-TLNRID sy-vline 
WA_VN1PRDOC_STR-DOKAR sy-vline 
WA_VN1PRDOC_STR-DOKNR sy-vline 
WA_VN1PRDOC_STR-DOKVR sy-vline 
WA_VN1PRDOC_STR-DOKTL sy-vline 
WA_VN1PRDOC_STR-LFDDOK sy-vline 
WA_VN1PRDOC_STR-PATNR sy-vline 
WA_VN1PRDOC_STR-FALNR sy-vline 
WA_VN1PRDOC_STR-ANFID sy-vline 
WA_VN1PRDOC_STR-ORGDO sy-vline 
WA_VN1PRDOC_STR-ORGNAM sy-vline 
WA_VN1PRDOC_STR-ORGLA sy-vline 
WA_VN1PRDOC_STR-OLANAM sy-vline 
WA_VN1PRDOC_STR-MITARB sy-vline 
WA_VN1PRDOC_STR-MITNAM sy-vline 
WA_VN1PRDOC_STR-DTID sy-vline 
WA_VN1PRDOC_STR-DTVERS sy-vline 
WA_VN1PRDOC_STR-DTBEZ sy-vline 
WA_VN1PRDOC_STR-DTKB sy-vline 
WA_VN1PRDOC_STR-BEZEB sy-vline 
WA_VN1PRDOC_STR-MEDOK sy-vline 
WA_VN1PRDOC_STR-DODAT sy-vline 
WA_VN1PRDOC_STR-DOTIM sy-vline 
WA_VN1PRDOC_STR-ERDAT sy-vline 
WA_VN1PRDOC_STR-ERTIM sy-vline 
WA_VN1PRDOC_STR-ERUSR sy-vline 
WA_VN1PRDOC_STR-UPDAT sy-vline 
WA_VN1PRDOC_STR-UPTIM sy-vline 
WA_VN1PRDOC_STR-UPUSR sy-vline 
WA_VN1PRDOC_STR-LOEKZ sy-vline 
WA_VN1PRDOC_STR-LOUSR sy-vline 
WA_VN1PRDOC_STR-LODAT sy-vline 
WA_VN1PRDOC_STR-LOTIM sy-vline 
WA_VN1PRDOC_STR-PCODE sy-vline 
WA_VN1PRDOC_STR-PCODETXT sy-vline 
WA_VN1PRDOC_STR-LNRLS sy-vline 
WA_VN1PRDOC_STR-LFDBEW sy-vline 
WA_VN1PRDOC_STR-LEIST sy-vline 
WA_VN1PRDOC_STR-LEITX sy-vline 
WA_VN1PRDOC_STR-STORN sy-vline 
WA_VN1PRDOC_STR-STUSR sy-vline 
WA_VN1PRDOC_STR-STDAT sy-vline 
WA_VN1PRDOC_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.