ABAP Select data from SAP table VN2DTPART2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VN2DTPART2 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 VN2DTPART2. 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 VN2DTPART2 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_VN2DTPART2 TYPE STANDARD TABLE OF VN2DTPART2,
      WA_VN2DTPART2 TYPE VN2DTPART2,
      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: <VN2DTPART2> TYPE VN2DTPART2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VN2DTPART2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VN2DTPART2
  INTO TABLE IT_VN2DTPART2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VN2DTPART2
*  INTO TABLE @DATA(IT_VN2DTPART22).
*--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_VN2DTPART2 INDEX 1 INTO DATA(WA_VN2DTPART22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VN2DTPART2 ASSIGNING <VN2DTPART2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VN2DTPART2>-MANDT = 1.
<VN2DTPART2>-EINRI = 1.
<VN2DTPART2>-DTID = 1.
<VN2DTPART2>-DTVERS = 1.
<VN2DTPART2>-DTUUID = 1.

ENDLOOP.

LOOP AT IT_VN2DTPART2 INTO WA_VN2DTPART2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VN2DTPART2-FKTDOKANL_GSD, sy-vline,
  WA_VN2DTPART2-FKTDOKSTART_GSD, sy-vline,
  WA_VN2DTPART2-FKTDOKCHECK_GSD, sy-vline,
  WA_VN2DTPART2-FKTDOKSAVE_GSD, sy-vline,
  WA_VN2DTPART2-FKTDOKEND_GSD, sy-vline,
  WA_VN2DTPART2-FKTPAI_PRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VN2DTPART2 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_VN2DTPART2 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_VN2DTPART2 INTO WA_VN2DTPART2.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VN2DTPART2-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VN2DTPART2-EINRI.
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_VN2DTPART2_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
DTID TYPE STRING,
DTVERS TYPE STRING,
DTUUID TYPE STRING,
FKTDOKANL_GSD TYPE STRING,
FKTDOKSTART_GSD TYPE STRING,
FKTDOKCHECK_GSD TYPE STRING,
FKTDOKSAVE_GSD TYPE STRING,
FKTDOKEND_GSD TYPE STRING,
FKTPAI_PRE TYPE STRING,
FKTDOKANL_PRE TYPE STRING,
FKTDOKSTART_PRE TYPE STRING,
FKTDOKCHECK_PRE TYPE STRING,
FKTDOKSAVE_PRE TYPE STRING,
FKTDOKEND_PRE TYPE STRING,
PAI_PRE_DEAKT TYPE STRING,
PAI_GSD_DEAKT TYPE STRING,
PAI_DEAKT TYPE STRING,
DOKANL_PRE_DEAKT TYPE STRING,
DOKANL_GSD_DEAKT TYPE STRING,
DOKANL_DEAKT TYPE STRING,
DSTART_PRE_DEAKT TYPE STRING,
DSTART_GSD_DEAKT TYPE STRING,
DSTART_DEAKT TYPE STRING,
DCHECK_PRE_DEAKT TYPE STRING,
DCHECK_GSD_DEAKT TYPE STRING,
DCHECK_DEAKT TYPE STRING,
DSAVE_PRE_DEAKT TYPE STRING,
DSAVE_GSD_DEAKT TYPE STRING,
DSAVE_DEAKT TYPE STRING,
DEND_PRE_DEAKT TYPE STRING,
DEND_GSD_DEAKT TYPE STRING,
DEND_DEAKT TYPE STRING,
PRISTART_PRE TYPE STRING,
PRISTART_GSD TYPE STRING,
PRIOUT_PRE TYPE STRING,
PRIOUT_GSD TYPE STRING,
PRIEND_PRE TYPE STRING,
PRIEND_GSD TYPE STRING,
PRISTART_PRE_NO TYPE STRING,
PRISTART_GSD_NO TYPE STRING,
PRISTART_POST_NO TYPE STRING,
PRIOUT_PRE_NO TYPE STRING,
PRIOUT_GSD_NO TYPE STRING,
PRIOUT_POST_NO TYPE STRING,
PRIEND_PRE_NO TYPE STRING,
PRIEND_GSD_NO TYPE STRING,
PRIEND_POST_NO TYPE STRING,
UEXINCL_GSD2 TYPE STRING,
USRFORM_DEAKT TYPE STRING,
P2NAMESPACE TYPE STRING,
P2OBJPREFIX TYPE STRING,
P2LINETYPE TYPE STRING,
P2PDFFORMULAR TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VN2DTPART2_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_VN2DTPART2_STR-MANDT sy-vline 
WA_VN2DTPART2_STR-EINRI sy-vline 
WA_VN2DTPART2_STR-DTID sy-vline 
WA_VN2DTPART2_STR-DTVERS sy-vline 
WA_VN2DTPART2_STR-DTUUID sy-vline 
WA_VN2DTPART2_STR-FKTDOKANL_GSD sy-vline 
WA_VN2DTPART2_STR-FKTDOKSTART_GSD sy-vline 
WA_VN2DTPART2_STR-FKTDOKCHECK_GSD sy-vline 
WA_VN2DTPART2_STR-FKTDOKSAVE_GSD sy-vline 
WA_VN2DTPART2_STR-FKTDOKEND_GSD sy-vline 
WA_VN2DTPART2_STR-FKTPAI_PRE sy-vline 
WA_VN2DTPART2_STR-FKTDOKANL_PRE sy-vline 
WA_VN2DTPART2_STR-FKTDOKSTART_PRE sy-vline 
WA_VN2DTPART2_STR-FKTDOKCHECK_PRE sy-vline 
WA_VN2DTPART2_STR-FKTDOKSAVE_PRE sy-vline 
WA_VN2DTPART2_STR-FKTDOKEND_PRE sy-vline 
WA_VN2DTPART2_STR-PAI_PRE_DEAKT sy-vline 
WA_VN2DTPART2_STR-PAI_GSD_DEAKT sy-vline 
WA_VN2DTPART2_STR-PAI_DEAKT sy-vline 
WA_VN2DTPART2_STR-DOKANL_PRE_DEAKT sy-vline 
WA_VN2DTPART2_STR-DOKANL_GSD_DEAKT sy-vline 
WA_VN2DTPART2_STR-DOKANL_DEAKT sy-vline 
WA_VN2DTPART2_STR-DSTART_PRE_DEAKT sy-vline 
WA_VN2DTPART2_STR-DSTART_GSD_DEAKT sy-vline 
WA_VN2DTPART2_STR-DSTART_DEAKT sy-vline 
WA_VN2DTPART2_STR-DCHECK_PRE_DEAKT sy-vline 
WA_VN2DTPART2_STR-DCHECK_GSD_DEAKT sy-vline 
WA_VN2DTPART2_STR-DCHECK_DEAKT sy-vline 
WA_VN2DTPART2_STR-DSAVE_PRE_DEAKT sy-vline 
WA_VN2DTPART2_STR-DSAVE_GSD_DEAKT sy-vline 
WA_VN2DTPART2_STR-DSAVE_DEAKT sy-vline 
WA_VN2DTPART2_STR-DEND_PRE_DEAKT sy-vline 
WA_VN2DTPART2_STR-DEND_GSD_DEAKT sy-vline 
WA_VN2DTPART2_STR-DEND_DEAKT sy-vline 
WA_VN2DTPART2_STR-PRISTART_PRE sy-vline 
WA_VN2DTPART2_STR-PRISTART_GSD sy-vline 
WA_VN2DTPART2_STR-PRIOUT_PRE sy-vline 
WA_VN2DTPART2_STR-PRIOUT_GSD sy-vline 
WA_VN2DTPART2_STR-PRIEND_PRE sy-vline 
WA_VN2DTPART2_STR-PRIEND_GSD sy-vline 
WA_VN2DTPART2_STR-PRISTART_PRE_NO sy-vline 
WA_VN2DTPART2_STR-PRISTART_GSD_NO sy-vline 
WA_VN2DTPART2_STR-PRISTART_POST_NO sy-vline 
WA_VN2DTPART2_STR-PRIOUT_PRE_NO sy-vline 
WA_VN2DTPART2_STR-PRIOUT_GSD_NO sy-vline 
WA_VN2DTPART2_STR-PRIOUT_POST_NO sy-vline 
WA_VN2DTPART2_STR-PRIEND_PRE_NO sy-vline 
WA_VN2DTPART2_STR-PRIEND_GSD_NO sy-vline 
WA_VN2DTPART2_STR-PRIEND_POST_NO sy-vline 
WA_VN2DTPART2_STR-UEXINCL_GSD2 sy-vline 
WA_VN2DTPART2_STR-USRFORM_DEAKT sy-vline 
WA_VN2DTPART2_STR-P2NAMESPACE sy-vline 
WA_VN2DTPART2_STR-P2OBJPREFIX sy-vline 
WA_VN2DTPART2_STR-P2LINETYPE sy-vline 
WA_VN2DTPART2_STR-P2PDFFORMULAR sy-vline 
WA_VN2DTPART2_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.