ABAP Select data from SAP table PTK34_OLD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTK34_OLD 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 PTK34_OLD. 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 PTK34_OLD 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_PTK34_OLD TYPE STANDARD TABLE OF PTK34_OLD,
      WA_PTK34_OLD TYPE PTK34_OLD,
      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: <PTK34_OLD> TYPE PTK34_OLD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PTK34_OLD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PTK34_OLD
  INTO TABLE IT_PTK34_OLD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTK34_OLD
*  INTO TABLE @DATA(IT_PTK34_OLD2).
*--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_PTK34_OLD INDEX 1 INTO DATA(WA_PTK34_OLD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PTK34_OLD ASSIGNING <PTK34_OLD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTK34_OLD>-KATEG = 1.
<PTK34_OLD>-SPKZL = 1.
<PTK34_OLD>-BETRG = 1.
<PTK34_OLD>-WAERS = 1.
<PTK34_OLD>-BKURS = 1.

ENDLOOP.

LOOP AT IT_PTK34_OLD INTO WA_PTK34_OLD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTK34_OLD-MWSKZ, sy-vline,
  WA_PTK34_OLD-BDATU, sy-vline,
  WA_PTK34_OLD-BZEIT, sy-vline,
  WA_PTK34_OLD-BTEXT, sy-vline,
  WA_PTK34_OLD-ANZFR, sy-vline,
  WA_PTK34_OLD-LNDFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTK34_OLD 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_PTK34_OLD 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_PTK34_OLD INTO WA_PTK34_OLD.


*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_PTK34_OLD_STR, 
KATEG TYPE STRING,
SPKZL TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
BKURS TYPE STRING,
MWSKZ TYPE STRING,
BDATU TYPE STRING,
BZEIT TYPE STRING,
BTEXT TYPE STRING,
ANZFR TYPE STRING,
LNDFR TYPE STRING,
REGIO TYPE STRING,
C_DOC TYPE STRING,
TODO TYPE STRING,
CCOMP TYPE STRING,
C_TXT TYPE STRING,
FRONT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTK34_OLD_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_PTK34_OLD_STR-KATEG sy-vline 
WA_PTK34_OLD_STR-SPKZL sy-vline 
WA_PTK34_OLD_STR-BETRG sy-vline 
WA_PTK34_OLD_STR-WAERS sy-vline 
WA_PTK34_OLD_STR-BKURS sy-vline 
WA_PTK34_OLD_STR-MWSKZ sy-vline 
WA_PTK34_OLD_STR-BDATU sy-vline 
WA_PTK34_OLD_STR-BZEIT sy-vline 
WA_PTK34_OLD_STR-BTEXT sy-vline 
WA_PTK34_OLD_STR-ANZFR sy-vline 
WA_PTK34_OLD_STR-LNDFR sy-vline 
WA_PTK34_OLD_STR-REGIO sy-vline 
WA_PTK34_OLD_STR-C_DOC sy-vline 
WA_PTK34_OLD_STR-TODO sy-vline 
WA_PTK34_OLD_STR-CCOMP sy-vline 
WA_PTK34_OLD_STR-C_TXT sy-vline 
WA_PTK34_OLD_STR-FRONT sy-vline      INTO ld_text SEPARATED BY SPACE.

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