ABAP Select data from SAP table TFK006D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFK006D 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 TFK006D. 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 TFK006D 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_TFK006D TYPE STANDARD TABLE OF TFK006D,
      WA_TFK006D TYPE TFK006D,
      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: <TFK006D> TYPE TFK006D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFK006D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFK006D
  INTO TABLE IT_TFK006D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFK006D
*  INTO TABLE @DATA(IT_TFK006D2).
*--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_TFK006D INDEX 1 INTO DATA(WA_TFK006D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFK006D ASSIGNING <TFK006D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFK006D>-MANDT = 1.
<TFK006D>-OBTYP = 1.
<TFK006D>-BUKRS = 1.
<TFK006D>-LFDNR = 1.
<TFK006D>-NMLEN = 1.

ENDLOOP.

LOOP AT IT_TFK006D INTO WA_TFK006D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFK006D-NMDIG, sy-vline,
  WA_TFK006D-NMPAT, sy-vline,
  WA_TFK006D-NMLOW, sy-vline,
  WA_TFK006D-NMHIG, sy-vline,
  WA_TFK006D-NMBLO, sy-vline,
  WA_TFK006D-NMPRT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFK006D 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_TFK006D 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_TFK006D INTO WA_TFK006D.


*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_TFK006D_STR, 
MANDT TYPE STRING,
OBTYP TYPE STRING,
BUKRS TYPE STRING,
LFDNR TYPE STRING,
NMLEN TYPE STRING,
NMDIG TYPE STRING,
NMPAT TYPE STRING,
NMLOW TYPE STRING,
NMHIG TYPE STRING,
NMBLO TYPE STRING,
NMPRT TYPE STRING,
CHKID TYPE STRING,
KEYWB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFK006D_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_TFK006D_STR-MANDT sy-vline 
WA_TFK006D_STR-OBTYP sy-vline 
WA_TFK006D_STR-BUKRS sy-vline 
WA_TFK006D_STR-LFDNR sy-vline 
WA_TFK006D_STR-NMLEN sy-vline 
WA_TFK006D_STR-NMDIG sy-vline 
WA_TFK006D_STR-NMPAT sy-vline 
WA_TFK006D_STR-NMLOW sy-vline 
WA_TFK006D_STR-NMHIG sy-vline 
WA_TFK006D_STR-NMBLO sy-vline 
WA_TFK006D_STR-NMPRT sy-vline 
WA_TFK006D_STR-CHKID sy-vline 
WA_TFK006D_STR-KEYWB sy-vline      INTO ld_text SEPARATED BY SPACE.

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