ABAP Select data from SAP table TFK047U into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFK047U 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 TFK047U. 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 TFK047U 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_TFK047U TYPE STANDARD TABLE OF TFK047U,
      WA_TFK047U TYPE TFK047U,
      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: <TFK047U> TYPE TFK047U.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFK047U.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFK047U
  INTO TABLE IT_TFK047U.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFK047U
*  INTO TABLE @DATA(IT_TFK047U2).
*--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_TFK047U INDEX 1 INTO DATA(WA_TFK047U2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFK047U ASSIGNING <TFK047U>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFK047U>-MANDT = 1.
<TFK047U>-STEP = 1.
<TFK047U>-STEPLEVEL = 1.
<TFK047U>-STEPTYPE = 1.
<TFK047U>-ALTST = 1.

ENDLOOP.

LOOP AT IT_TFK047U INTO WA_TFK047U.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFK047U-INTRV, sy-vline,
  WA_TFK047U-XMFAC, sy-vline,
  WA_TFK047U-MFCID, sy-vline,
  WA_TFK047U-CLOSEGROUP, sy-vline,
  WA_TFK047U-FRIST, sy-vline,
  WA_TFK047U-BONIG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFK047U 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_TFK047U 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_TFK047U INTO WA_TFK047U.


*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_TFK047U_STR, 
MANDT TYPE STRING,
STEP TYPE STRING,
STEPLEVEL TYPE STRING,
STEPTYPE TYPE STRING,
ALTST TYPE STRING,
INTRV TYPE STRING,
XMFAC TYPE STRING,
MFCID TYPE STRING,
CLOSEGROUP TYPE STRING,
FRIST TYPE STRING,
BONIG TYPE STRING,
IKEY TYPE STRING,
IPOST TYPE STRING,
ICALC TYPE STRING,
INTFIRST TYPE STRING,
CHGID TYPE STRING,
CHGT1 TYPE STRING,
CHGT2 TYPE STRING,
CHGT3 TYPE STRING,
NEWDC TYPE STRING,
XDSUC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFK047U_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_TFK047U_STR-MANDT sy-vline 
WA_TFK047U_STR-STEP sy-vline 
WA_TFK047U_STR-STEPLEVEL sy-vline 
WA_TFK047U_STR-STEPTYPE sy-vline 
WA_TFK047U_STR-ALTST sy-vline 
WA_TFK047U_STR-INTRV sy-vline 
WA_TFK047U_STR-XMFAC sy-vline 
WA_TFK047U_STR-MFCID sy-vline 
WA_TFK047U_STR-CLOSEGROUP sy-vline 
WA_TFK047U_STR-FRIST sy-vline 
WA_TFK047U_STR-BONIG sy-vline 
WA_TFK047U_STR-IKEY sy-vline 
WA_TFK047U_STR-IPOST sy-vline 
WA_TFK047U_STR-ICALC sy-vline 
WA_TFK047U_STR-INTFIRST sy-vline 
WA_TFK047U_STR-CHGID sy-vline 
WA_TFK047U_STR-CHGT1 sy-vline 
WA_TFK047U_STR-CHGT2 sy-vline 
WA_TFK047U_STR-CHGT3 sy-vline 
WA_TFK047U_STR-NEWDC sy-vline 
WA_TFK047U_STR-XDSUC sy-vline      INTO ld_text SEPARATED BY SPACE.

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