ABAP Select data from SAP table TFK042FE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFK042FE 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 TFK042FE. 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 TFK042FE 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_TFK042FE TYPE STANDARD TABLE OF TFK042FE,
      WA_TFK042FE TYPE TFK042FE,
      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: <TFK042FE> TYPE TFK042FE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFK042FE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFK042FE
  INTO TABLE IT_TFK042FE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFK042FE
*  INTO TABLE @DATA(IT_TFK042FE2).
*--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_TFK042FE INDEX 1 INTO DATA(WA_TFK042FE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFK042FE ASSIGNING <TFK042FE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFK042FE>-MANDT = 1.
<TFK042FE>-OPBUK = 1.
<TFK042FE>-FORMI = 1.
<TFK042FE>-ZFORN = 1.
<TFK042FE>-WFORN = 1.

ENDLOOP.

LOOP AT IT_TFK042FE INTO WA_TFK042FE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFK042FE-DFORN, sy-vline,
  WA_TFK042FE-PDFDF, sy-vline,
  WA_TFK042FE-AUST1, sy-vline,
  WA_TFK042FE-AUST2, sy-vline,
  WA_TFK042FE-AUST3, sy-vline,
  WA_TFK042FE-AUSTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFK042FE 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_TFK042FE 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_TFK042FE INTO WA_TFK042FE.


*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_TFK042FE_STR, 
MANDT TYPE STRING,
OPBUK TYPE STRING,
FORMI TYPE STRING,
ZFORN TYPE STRING,
WFORN TYPE STRING,
DFORN TYPE STRING,
PDFDF TYPE STRING,
AUST1 TYPE STRING,
AUST2 TYPE STRING,
AUST3 TYPE STRING,
AUSTO TYPE STRING,
ANZPO TYPE STRING,
ANZP2 TYPE STRING,
XADVS TYPE STRING,
XADVA TYPE STRING,
PARAL TYPE STRING,
PAANZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFK042FE_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_TFK042FE_STR-MANDT sy-vline 
WA_TFK042FE_STR-OPBUK sy-vline 
WA_TFK042FE_STR-FORMI sy-vline 
WA_TFK042FE_STR-ZFORN sy-vline 
WA_TFK042FE_STR-WFORN sy-vline 
WA_TFK042FE_STR-DFORN sy-vline 
WA_TFK042FE_STR-PDFDF sy-vline 
WA_TFK042FE_STR-AUST1 sy-vline 
WA_TFK042FE_STR-AUST2 sy-vline 
WA_TFK042FE_STR-AUST3 sy-vline 
WA_TFK042FE_STR-AUSTO sy-vline 
WA_TFK042FE_STR-ANZPO sy-vline 
WA_TFK042FE_STR-ANZP2 sy-vline 
WA_TFK042FE_STR-XADVS sy-vline 
WA_TFK042FE_STR-XADVA sy-vline 
WA_TFK042FE_STR-PARAL sy-vline 
WA_TFK042FE_STR-PAANZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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