ABAP Select data from SAP table VPK_DI_GUIDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VPK_DI_GUIDATA
*  INTO TABLE @DATA(IT_VPK_DI_GUIDATA2).
*--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_VPK_DI_GUIDATA INDEX 1 INTO DATA(WA_VPK_DI_GUIDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VPK_DI_GUIDATA>-ID = 1.
<VPK_DI_GUIDATA>-TYPE = 1.
<VPK_DI_GUIDATA>-NODE_NAME = 1.
<VPK_DI_GUIDATA>-CHANGED = 1.
<VPK_DI_GUIDATA>-MARK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VPK_DI_GUIDATA-STATUS, sy-vline,
  WA_VPK_DI_GUIDATA-LOCKED, sy-vline,
  WA_VPK_DI_GUIDATA-AMNT_ORIGINAL, sy-vline,
  WA_VPK_DI_GUIDATA-QNTY_ORIGINAL, sy-vline,
  WA_VPK_DI_GUIDATA-AMNT_BILLED, sy-vline,
  WA_VPK_DI_GUIDATA-QNTY_BILLED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VPK_DI_GUIDATA 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_VPK_DI_GUIDATA 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_VPK_DI_GUIDATA INTO WA_VPK_DI_GUIDATA.


*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 DTYPE, internal->external for field LOCKED
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_VPK_DI_GUIDATA-LOCKED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPK_DI_GUIDATA-LOCKED.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VPK_DI_GUIDATA-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VPK_DI_GUIDATA-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_VPK_DI_GUIDATA_STR, 
ID TYPE STRING,
TYPE TYPE STRING,
NODE_NAME TYPE STRING,
CHANGED TYPE STRING,
MARK TYPE STRING,
STATUS TYPE STRING,
LOCKED TYPE STRING,
AMNT_ORIGINAL TYPE STRING,
QNTY_ORIGINAL TYPE STRING,
AMNT_BILLED TYPE STRING,
QNTY_BILLED TYPE STRING,
AMNT_OPEN TYPE STRING,
QNTY_OPEN TYPE STRING,
AMNT_QUOT TYPE STRING,
QNTY_QUOT TYPE STRING,
RATI_QUOT TYPE STRING,
AMNT_BILLING TYPE STRING,
QNTY_BILLING TYPE STRING,
RATI_BILLING TYPE STRING,
AMNT_POSTPONE TYPE STRING,
QNTY_POSTPONE TYPE STRING,
RATI_POSTPONE TYPE STRING,
AMNT_REJECT TYPE STRING,
QNTY_REJECT TYPE STRING,
RATI_REJECT TYPE STRING,
AMNT_BILLING2 TYPE STRING,
QNTY_BILLING2 TYPE STRING,
AMNT_BILLED2 TYPE STRING,
QNTY_BILLED2 TYPE STRING,
AMNT_CANCELED TYPE STRING,
QNTY_CANCELED TYPE STRING,
AMNT_COS TYPE STRING,
QNTY_COS TYPE STRING,
RATI_COS TYPE STRING,
AMNT_WIP TYPE STRING,
QNTY_WIP TYPE STRING,
RATI_WIP TYPE STRING,
NETVALUE TYPE STRING,
WAERS TYPE STRING,
VWAER TYPE STRING,
MEINH TYPE STRING,
BEMOT TYPE STRING,
AUMOT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VPK_DI_GUIDATA_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_VPK_DI_GUIDATA_STR-ID sy-vline 
WA_VPK_DI_GUIDATA_STR-TYPE sy-vline 
WA_VPK_DI_GUIDATA_STR-NODE_NAME sy-vline 
WA_VPK_DI_GUIDATA_STR-CHANGED sy-vline 
WA_VPK_DI_GUIDATA_STR-MARK sy-vline 
WA_VPK_DI_GUIDATA_STR-STATUS sy-vline 
WA_VPK_DI_GUIDATA_STR-LOCKED sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_ORIGINAL sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_ORIGINAL sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_BILLED sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_BILLED sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_OPEN sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_OPEN sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_QUOT sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_QUOT sy-vline 
WA_VPK_DI_GUIDATA_STR-RATI_QUOT sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_BILLING sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_BILLING sy-vline 
WA_VPK_DI_GUIDATA_STR-RATI_BILLING sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_POSTPONE sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_POSTPONE sy-vline 
WA_VPK_DI_GUIDATA_STR-RATI_POSTPONE sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_REJECT sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_REJECT sy-vline 
WA_VPK_DI_GUIDATA_STR-RATI_REJECT sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_BILLING2 sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_BILLING2 sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_BILLED2 sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_BILLED2 sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_CANCELED sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_CANCELED sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_COS sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_COS sy-vline 
WA_VPK_DI_GUIDATA_STR-RATI_COS sy-vline 
WA_VPK_DI_GUIDATA_STR-AMNT_WIP sy-vline 
WA_VPK_DI_GUIDATA_STR-QNTY_WIP sy-vline 
WA_VPK_DI_GUIDATA_STR-RATI_WIP sy-vline 
WA_VPK_DI_GUIDATA_STR-NETVALUE sy-vline 
WA_VPK_DI_GUIDATA_STR-WAERS sy-vline 
WA_VPK_DI_GUIDATA_STR-VWAER sy-vline 
WA_VPK_DI_GUIDATA_STR-MEINH sy-vline 
WA_VPK_DI_GUIDATA_STR-BEMOT sy-vline 
WA_VPK_DI_GUIDATA_STR-AUMOT sy-vline      INTO ld_text SEPARATED BY SPACE.

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