ABAP Select data from SAP table VPKO_IFS_GENITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VPKO_IFS_GENITEM
*  INTO TABLE @DATA(IT_VPKO_IFS_GENITEM2).
*--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_VPKO_IFS_GENITEM INDEX 1 INTO DATA(WA_VPKO_IFS_GENITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VPKO_IFS_GENITEM>-ID = 1.
<VPKO_IFS_GENITEM>-STATUS = 1.
<VPKO_IFS_GENITEM>-LOCKED = 1.
<VPKO_IFS_GENITEM>-BEMOT = 1.
<VPKO_IFS_GENITEM>-AUMOT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VPKO_IFS_GENITEM-TWAER, sy-vline,
  WA_VPKO_IFS_GENITEM-OWAER, sy-vline,
  WA_VPKO_IFS_GENITEM-KWAER, sy-vline,
  WA_VPKO_IFS_GENITEM-VWAER, sy-vline,
  WA_VPKO_IFS_GENITEM-MEINH, sy-vline,
  WA_VPKO_IFS_GENITEM-SO_WTGBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VPKO_IFS_GENITEM 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_VPKO_IFS_GENITEM 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_VPKO_IFS_GENITEM INTO WA_VPKO_IFS_GENITEM.


*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 CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VPKO_IFS_GENITEM-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPKO_IFS_GENITEM-MEINH.
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_VPKO_IFS_GENITEM_STR, 
ID TYPE STRING,
STATUS TYPE STRING,
LOCKED TYPE STRING,
BEMOT TYPE STRING,
AUMOT TYPE STRING,
TWAER TYPE STRING,
OWAER TYPE STRING,
KWAER TYPE STRING,
VWAER TYPE STRING,
MEINH TYPE STRING,
SO_WTGBTR TYPE STRING,
SO_WOGBTR TYPE STRING,
SO_WKGBTR TYPE STRING,
SO_MEGBTR TYPE STRING,
BI_WTGBTR TYPE STRING,
BI_WOGBTR TYPE STRING,
BI_WKGBTR TYPE STRING,
BI_MEGBTR TYPE STRING,
OP_WTGBTR TYPE STRING,
OP_WOGBTR TYPE STRING,
OP_WKGBTR TYPE STRING,
OP_MEGBTR TYPE STRING,
CA_WTGBTR TYPE STRING,
CA_WOGBTR TYPE STRING,
CA_WKGBTR TYPE STRING,
CA_MEGBTR TYPE STRING,
IN_WTGBTR TYPE STRING,
IN_WOGBTR TYPE STRING,
IN_WKGBTR TYPE STRING,
IN_MEGBTR TYPE STRING,
LA_WTGBTR TYPE STRING,
LA_WOGBTR TYPE STRING,
LA_WKGBTR TYPE STRING,
LA_MEGBTR TYPE STRING,
NO_WTGBTR TYPE STRING,
NO_WOGBTR TYPE STRING,
NO_WKGBTR TYPE STRING,
NO_MEGBTR TYPE STRING,
BA_WTGBTR TYPE STRING,
BA_WOGBTR TYPE STRING,
BA_WKGBTR TYPE STRING,
BA_MEGBTR TYPE STRING,
IN_RATIO TYPE STRING,
LA_RATIO TYPE STRING,
NO_RATIO TYPE STRING,
NETVALUE TYPE STRING,
NETPR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VPKO_IFS_GENITEM_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_VPKO_IFS_GENITEM_STR-ID sy-vline 
WA_VPKO_IFS_GENITEM_STR-STATUS sy-vline 
WA_VPKO_IFS_GENITEM_STR-LOCKED sy-vline 
WA_VPKO_IFS_GENITEM_STR-BEMOT sy-vline 
WA_VPKO_IFS_GENITEM_STR-AUMOT sy-vline 
WA_VPKO_IFS_GENITEM_STR-TWAER sy-vline 
WA_VPKO_IFS_GENITEM_STR-OWAER sy-vline 
WA_VPKO_IFS_GENITEM_STR-KWAER sy-vline 
WA_VPKO_IFS_GENITEM_STR-VWAER sy-vline 
WA_VPKO_IFS_GENITEM_STR-MEINH sy-vline 
WA_VPKO_IFS_GENITEM_STR-SO_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-SO_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-SO_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-SO_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BI_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BI_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BI_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BI_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-OP_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-OP_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-OP_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-OP_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-CA_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-CA_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-CA_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-CA_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-IN_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-IN_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-IN_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-IN_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-LA_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-LA_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-LA_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-LA_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-NO_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-NO_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-NO_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-NO_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BA_WTGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BA_WOGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BA_WKGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-BA_MEGBTR sy-vline 
WA_VPKO_IFS_GENITEM_STR-IN_RATIO sy-vline 
WA_VPKO_IFS_GENITEM_STR-LA_RATIO sy-vline 
WA_VPKO_IFS_GENITEM_STR-NO_RATIO sy-vline 
WA_VPKO_IFS_GENITEM_STR-NETVALUE sy-vline 
WA_VPKO_IFS_GENITEM_STR-NETPR sy-vline      INTO ld_text SEPARATED BY SPACE.

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