ABAP Select data from SAP table PTK23 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTK23 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 PTK23. 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 PTK23 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_PTK23 TYPE STANDARD TABLE OF PTK23,
      WA_PTK23 TYPE PTK23,
      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: <PTK23> TYPE PTK23.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PTK23.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PTK23
  INTO TABLE IT_PTK23.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTK23
*  INTO TABLE @DATA(IT_PTK232).
*--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_PTK23 INDEX 1 INTO DATA(WA_PTK232).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PTK23 ASSIGNING <PTK23>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTK23>-DATV1 = 1.
<PTK23>-UHRV1 = 1.
<PTK23>-DATB1 = 1.
<PTK23>-UHRB1 = 1.
<PTK23>-VPFPH = 1.

ENDLOOP.

LOOP AT IT_PTK23 INTO WA_PTK23.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTK23-VPFKZ, sy-vline,
  WA_PTK23-ZIKEY, sy-vline,
  WA_PTK23-WAERS, sy-vline,
  WA_PTK23-BETFZ, sy-vline,
  WA_PTK23-BETFA, sy-vline,
  WA_PTK23-BETKU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTK23 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_PTK23 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_PTK23 INTO WA_PTK23.


*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_PTK23_STR, 
DATV1 TYPE STRING,
UHRV1 TYPE STRING,
DATB1 TYPE STRING,
UHRB1 TYPE STRING,
VPFPH TYPE STRING,
VPFKZ TYPE STRING,
ZIKEY TYPE STRING,
WAERS TYPE STRING,
BETFZ TYPE STRING,
BETFA TYPE STRING,
BETKU TYPE STRING,
ABBFZ TYPE STRING,
ABBFA TYPE STRING,
ABBKU TYPE STRING,
V0TYP TYPE STRING,
V0ZNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTK23_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_PTK23_STR-DATV1 sy-vline 
WA_PTK23_STR-UHRV1 sy-vline 
WA_PTK23_STR-DATB1 sy-vline 
WA_PTK23_STR-UHRB1 sy-vline 
WA_PTK23_STR-VPFPH sy-vline 
WA_PTK23_STR-VPFKZ sy-vline 
WA_PTK23_STR-ZIKEY sy-vline 
WA_PTK23_STR-WAERS sy-vline 
WA_PTK23_STR-BETFZ sy-vline 
WA_PTK23_STR-BETFA sy-vline 
WA_PTK23_STR-BETKU sy-vline 
WA_PTK23_STR-ABBFZ sy-vline 
WA_PTK23_STR-ABBFA sy-vline 
WA_PTK23_STR-ABBKU sy-vline 
WA_PTK23_STR-V0TYP sy-vline 
WA_PTK23_STR-V0ZNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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