ABAP Select data from SAP table TKKVPNTYP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKKVPNTYP
*  INTO TABLE @DATA(IT_TKKVPNTYP2).
*--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_TKKVPNTYP INDEX 1 INTO DATA(WA_TKKVPNTYP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKKVPNTYP>-MANDT = 1.
<TKKVPNTYP>-PNTYP = 1.
<TKKVPNTYP>-UVCTR = 1.
<TKKVPNTYP>-FNAM1 = 1.
<TKKVPNTYP>-FNAM2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKKVPNTYP-FNAM3, sy-vline,
  WA_TKKVPNTYP-PCNCL, sy-vline,
  WA_TKKVPNTYP-UVTIM, sy-vline,
  WA_TKKVPNTYP-PRGOP, sy-vline,
  WA_TKKVPNTYP-PRGCL, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_TKKVPNTYP 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_TKKVPNTYP 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_TKKVPNTYP INTO WA_TKKVPNTYP.


*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_TKKVPNTYP_STR, 
MANDT TYPE STRING,
PNTYP TYPE STRING,
UVCTR TYPE STRING,
FNAM1 TYPE STRING,
FNAM2 TYPE STRING,
FNAM3 TYPE STRING,
PCNCL TYPE STRING,
UVTIM TYPE STRING,
PRGOP TYPE STRING,
PRGCL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKKVPNTYP_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_TKKVPNTYP_STR-MANDT sy-vline 
WA_TKKVPNTYP_STR-PNTYP sy-vline 
WA_TKKVPNTYP_STR-UVCTR sy-vline 
WA_TKKVPNTYP_STR-FNAM1 sy-vline 
WA_TKKVPNTYP_STR-FNAM2 sy-vline 
WA_TKKVPNTYP_STR-FNAM3 sy-vline 
WA_TKKVPNTYP_STR-PCNCL sy-vline 
WA_TKKVPNTYP_STR-UVTIM sy-vline 
WA_TKKVPNTYP_STR-PRGOP sy-vline 
WA_TKKVPNTYP_STR-PRGCL sy-vline      INTO ld_text SEPARATED BY SPACE.

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