ABAP Select data from SAP table TFK8168 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFK8168 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 TFK8168. 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 TFK8168 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_TFK8168 TYPE STANDARD TABLE OF TFK8168,
      WA_TFK8168 TYPE TFK8168,
      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: <TFK8168> TYPE TFK8168.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFK8168.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFK8168
  INTO TABLE IT_TFK8168.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFK8168
*  INTO TABLE @DATA(IT_TFK81682).
*--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_TFK8168 INDEX 1 INTO DATA(WA_TFK81682).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFK8168 ASSIGNING <TFK8168>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFK8168>-MANDT = 1.
<TFK8168>-DCSCHEMA = 1.
<TFK8168>-DCPROCRULE = 1.
<TFK8168>-DCPROCRULE4 = 1.
<TFK8168>-DCFUNC = 1.

ENDLOOP.

LOOP AT IT_TFK8168 INTO WA_TFK8168.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFK8168-DCCHECKPER, sy-vline,
  WA_TFK8168-DCEXCREASON, sy-vline,
  WA_TFK8168-RATINGREVREASON, sy-vline,
  WA_TFK8168-DCMAXDUPREC, sy-vline,
  WA_TFK8168-DCOUTDATRULE, sy-vline,
  WA_TFK8168-DCRETPER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFK8168 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_TFK8168 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_TFK8168 INTO WA_TFK8168.


*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_TFK8168_STR, 
MANDT TYPE STRING,
DCSCHEMA TYPE STRING,
DCPROCRULE TYPE STRING,
DCPROCRULE4 TYPE STRING,
DCFUNC TYPE STRING,
DCCHECKPER TYPE STRING,
DCEXCREASON TYPE STRING,
RATINGREVREASON TYPE STRING,
DCMAXDUPREC TYPE STRING,
DCOUTDATRULE TYPE STRING,
DCRETPER TYPE STRING,
DCMETHOD TYPE STRING,
DCDBTAB_SUFF TYPE STRING,
DCORIGDISABLE TYPE STRING,
DCORIGDISABLE0 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFK8168_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_TFK8168_STR-MANDT sy-vline 
WA_TFK8168_STR-DCSCHEMA sy-vline 
WA_TFK8168_STR-DCPROCRULE sy-vline 
WA_TFK8168_STR-DCPROCRULE4 sy-vline 
WA_TFK8168_STR-DCFUNC sy-vline 
WA_TFK8168_STR-DCCHECKPER sy-vline 
WA_TFK8168_STR-DCEXCREASON sy-vline 
WA_TFK8168_STR-RATINGREVREASON sy-vline 
WA_TFK8168_STR-DCMAXDUPREC sy-vline 
WA_TFK8168_STR-DCOUTDATRULE sy-vline 
WA_TFK8168_STR-DCRETPER sy-vline 
WA_TFK8168_STR-DCMETHOD sy-vline 
WA_TFK8168_STR-DCDBTAB_SUFF sy-vline 
WA_TFK8168_STR-DCORIGDISABLE sy-vline 
WA_TFK8168_STR-DCORIGDISABLE0 sy-vline      INTO ld_text SEPARATED BY SPACE.

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