ABAP Select data from SAP table VN2PB00 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VN2PB00 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 VN2PB00. 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 VN2PB00 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_VN2PB00 TYPE STANDARD TABLE OF VN2PB00,
      WA_VN2PB00 TYPE VN2PB00,
      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: <VN2PB00> TYPE VN2PB00.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VN2PB00.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VN2PB00
  INTO TABLE IT_VN2PB00.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VN2PB00
*  INTO TABLE @DATA(IT_VN2PB002).
*--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_VN2PB00 INDEX 1 INTO DATA(WA_VN2PB002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VN2PB00 ASSIGNING <VN2PB00>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VN2PB00>-MANDT = 1.
<VN2PB00>-DOKAR = 1.
<VN2PB00>-DOKNR = 1.
<VN2PB00>-DOKVR = 1.
<VN2PB00>-DOKTL = 1.

ENDLOOP.

LOOP AT IT_VN2PB00 INTO WA_VN2PB00.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VN2PB00-MUSEQ, sy-vline,
  WA_VN2PB00-N4PBDAT, sy-vline,
  WA_VN2PB00-N4PBZT, sy-vline,
  WA_VN2PB00-N4PBVMA, sy-vline,
  WA_VN2PB00-N4PBSTAT, sy-vline,
  WA_VN2PB00-N4PBSTORN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VN2PB00 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_VN2PB00 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_VN2PB00 INTO WA_VN2PB00.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN2PB00-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN2PB00-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field N4PBVMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN2PB00-N4PBVMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN2PB00-N4PBVMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ISHM_ABRMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN2PB00-ISHM_ABRMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN2PB00-ISHM_ABRMA.
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_VN2PB00_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
MUSEQ TYPE STRING,
N4PBDAT TYPE STRING,
N4PBZT TYPE STRING,
N4PBVMA TYPE STRING,
N4PBSTAT TYPE STRING,
N4PBSTORN TYPE STRING,
N4PBERDAT TYPE STRING,
N4PBERTIM TYPE STRING,
N4PBERUSR TYPE STRING,
N4PBUPDAT TYPE STRING,
N4PBUPUSR TYPE STRING,
N4PBSTDAT TYPE STRING,
N4PBSTUSR TYPE STRING,
ISHM_ABRMA TYPE STRING,
N4PBNACH TYPE STRING,
N4PBKEY TYPE STRING,
N4PBTYP TYPE STRING,
N4PBOKEY TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VN2PB00_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_VN2PB00_STR-MANDT sy-vline 
WA_VN2PB00_STR-DOKAR sy-vline 
WA_VN2PB00_STR-DOKNR sy-vline 
WA_VN2PB00_STR-DOKVR sy-vline 
WA_VN2PB00_STR-DOKTL sy-vline 
WA_VN2PB00_STR-MUSEQ sy-vline 
WA_VN2PB00_STR-N4PBDAT sy-vline 
WA_VN2PB00_STR-N4PBZT sy-vline 
WA_VN2PB00_STR-N4PBVMA sy-vline 
WA_VN2PB00_STR-N4PBSTAT sy-vline 
WA_VN2PB00_STR-N4PBSTORN sy-vline 
WA_VN2PB00_STR-N4PBERDAT sy-vline 
WA_VN2PB00_STR-N4PBERTIM sy-vline 
WA_VN2PB00_STR-N4PBERUSR sy-vline 
WA_VN2PB00_STR-N4PBUPDAT sy-vline 
WA_VN2PB00_STR-N4PBUPUSR sy-vline 
WA_VN2PB00_STR-N4PBSTDAT sy-vline 
WA_VN2PB00_STR-N4PBSTUSR sy-vline 
WA_VN2PB00_STR-ISHM_ABRMA sy-vline 
WA_VN2PB00_STR-N4PBNACH sy-vline 
WA_VN2PB00_STR-N4PBKEY sy-vline 
WA_VN2PB00_STR-N4PBTYP sy-vline 
WA_VN2PB00_STR-N4PBOKEY sy-vline 
WA_VN2PB00_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.