ABAP Select data from SAP table V_TPKSF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TPKSF
*  INTO TABLE @DATA(IT_V_TPKSF2).
*--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_V_TPKSF INDEX 1 INTO DATA(WA_V_TPKSF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TPKSF>-MANDT = 1.
<V_TPKSF>-PKSFG = 1.
<V_TPKSF>-SFKT = 1.
<V_TPKSF>-SFGS1 = 1.
<V_TPKSF>-SFGS2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TPKSF-SFGS3, sy-vline,
  WA_V_TPKSF-SFGS4, sy-vline,
  WA_V_TPKSF-SFGS5, sy-vline,
  WA_V_TPKSF-SFGS6, sy-vline,
  WA_V_TPKSF-PKAKT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_V_TPKSF 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_V_TPKSF 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_V_TPKSF INTO WA_V_TPKSF.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_TPKSF_STR, 
MANDT TYPE STRING,
PKSFG TYPE STRING,
SFKT TYPE STRING,
SFGS1 TYPE STRING,
SFGS2 TYPE STRING,
SFGS3 TYPE STRING,
SFGS4 TYPE STRING,
SFGS5 TYPE STRING,
SFGS6 TYPE STRING,
PKAKT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TPKSF_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_V_TPKSF_STR-MANDT sy-vline 
WA_V_TPKSF_STR-PKSFG sy-vline 
WA_V_TPKSF_STR-SFKT sy-vline 
WA_V_TPKSF_STR-SFGS1 sy-vline 
WA_V_TPKSF_STR-SFGS2 sy-vline 
WA_V_TPKSF_STR-SFGS3 sy-vline 
WA_V_TPKSF_STR-SFGS4 sy-vline 
WA_V_TPKSF_STR-SFGS5 sy-vline 
WA_V_TPKSF_STR-SFGS6 sy-vline 
WA_V_TPKSF_STR-PKAKT sy-vline      INTO ld_text SEPARATED BY SPACE.

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