ABAP Select data from SAP table TFK125 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFK125 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 TFK125. 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 TFK125 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_TFK125 TYPE STANDARD TABLE OF TFK125,
      WA_TFK125 TYPE TFK125,
      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: <TFK125> TYPE TFK125.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFK125.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFK125
  INTO TABLE IT_TFK125.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFK125
*  INTO TABLE @DATA(IT_TFK1252).
*--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_TFK125 INDEX 1 INTO DATA(WA_TFK1252).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFK125 ASSIGNING <TFK125>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFK125>-MANDT = 1.
<TFK125>-APPLK = 1.
<TFK125>-GRUVAR = 1.
<TFK125>-GSTPNO = 1.
<TFK125>-GRNAM1 = 1.

ENDLOOP.

LOOP AT IT_TFK125 INTO WA_TFK125.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFK125-GRULE1, sy-vline,
  WA_TFK125-POKEN1, sy-vline,
  WA_TFK125-GRNAM2, sy-vline,
  WA_TFK125-GRULE2, sy-vline,
  WA_TFK125-POKEN2, sy-vline,
  WA_TFK125-GRNAM3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFK125 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_TFK125 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_TFK125 INTO WA_TFK125.


*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_TFK125_STR, 
MANDT TYPE STRING,
APPLK TYPE STRING,
GRUVAR TYPE STRING,
GSTPNO TYPE STRING,
GRNAM1 TYPE STRING,
GRULE1 TYPE STRING,
POKEN1 TYPE STRING,
GRNAM2 TYPE STRING,
GRULE2 TYPE STRING,
POKEN2 TYPE STRING,
GRNAM3 TYPE STRING,
GRULE3 TYPE STRING,
POKEN3 TYPE STRING,
GRNAM4 TYPE STRING,
GRULE4 TYPE STRING,
POKEN4 TYPE STRING,
GRNAM5 TYPE STRING,
GRULE5 TYPE STRING,
POKEN5 TYPE STRING,
SGRUVAR TYPE STRING,
SGSTPNO TYPE STRING,
GEXIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFK125_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_TFK125_STR-MANDT sy-vline 
WA_TFK125_STR-APPLK sy-vline 
WA_TFK125_STR-GRUVAR sy-vline 
WA_TFK125_STR-GSTPNO sy-vline 
WA_TFK125_STR-GRNAM1 sy-vline 
WA_TFK125_STR-GRULE1 sy-vline 
WA_TFK125_STR-POKEN1 sy-vline 
WA_TFK125_STR-GRNAM2 sy-vline 
WA_TFK125_STR-GRULE2 sy-vline 
WA_TFK125_STR-POKEN2 sy-vline 
WA_TFK125_STR-GRNAM3 sy-vline 
WA_TFK125_STR-GRULE3 sy-vline 
WA_TFK125_STR-POKEN3 sy-vline 
WA_TFK125_STR-GRNAM4 sy-vline 
WA_TFK125_STR-GRULE4 sy-vline 
WA_TFK125_STR-POKEN4 sy-vline 
WA_TFK125_STR-GRNAM5 sy-vline 
WA_TFK125_STR-GRULE5 sy-vline 
WA_TFK125_STR-POKEN5 sy-vline 
WA_TFK125_STR-SGRUVAR sy-vline 
WA_TFK125_STR-SGSTPNO sy-vline 
WA_TFK125_STR-GEXIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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