ABAP Select data from SAP table TKEPPLFUNC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKEPPLFUNC
*  INTO TABLE @DATA(IT_TKEPPLFUNC2).
*--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_TKEPPLFUNC INDEX 1 INTO DATA(WA_TKEPPLFUNC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKEPPLFUNC>-APPLCLASS = 1.
<TKEPPLFUNC>-SUBCLASS = 1.
<TKEPPLFUNC>-OKCODE = 1.
<TKEPPLFUNC>-INIT = 1.
<TKEPPLFUNC>-GETFTAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKEPPLFUNC-CHVTXT, sy-vline,
  WA_TKEPPLFUNC-CHVF4, sy-vline,
  WA_TKEPPLFUNC-CHCHK, sy-vline,
  WA_TKEPPLFUNC-PLLEVCHK, sy-vline,
  WA_TKEPPLFUNC-PLPCKCHK, sy-vline,
  WA_TKEPPLFUNC-METHSET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKEPPLFUNC 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_TKEPPLFUNC 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_TKEPPLFUNC INTO WA_TKEPPLFUNC.


*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_TKEPPLFUNC_STR, 
APPLCLASS TYPE STRING,
SUBCLASS TYPE STRING,
OKCODE TYPE STRING,
INIT TYPE STRING,
GETFTAB TYPE STRING,
CHVTXT TYPE STRING,
CHVF4 TYPE STRING,
CHCHK TYPE STRING,
PLLEVCHK TYPE STRING,
PLPCKCHK TYPE STRING,
METHSET TYPE STRING,
METHGET TYPE STRING,
METHEXESET TYPE STRING,
METHEXEGET TYPE STRING,
METHCHK TYPE STRING,
METHREAD TYPE STRING,
METHPOST TYPE STRING,
PARASET TYPE STRING,
PARAGET TYPE STRING,
PARAEXESET TYPE STRING,
PARAEXEGET TYPE STRING,
PARACHK TYPE STRING,
PARAREAD TYPE STRING,
PARAPOST TYPE STRING,
AUTH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKEPPLFUNC_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_TKEPPLFUNC_STR-APPLCLASS sy-vline 
WA_TKEPPLFUNC_STR-SUBCLASS sy-vline 
WA_TKEPPLFUNC_STR-OKCODE sy-vline 
WA_TKEPPLFUNC_STR-INIT sy-vline 
WA_TKEPPLFUNC_STR-GETFTAB sy-vline 
WA_TKEPPLFUNC_STR-CHVTXT sy-vline 
WA_TKEPPLFUNC_STR-CHVF4 sy-vline 
WA_TKEPPLFUNC_STR-CHCHK sy-vline 
WA_TKEPPLFUNC_STR-PLLEVCHK sy-vline 
WA_TKEPPLFUNC_STR-PLPCKCHK sy-vline 
WA_TKEPPLFUNC_STR-METHSET sy-vline 
WA_TKEPPLFUNC_STR-METHGET sy-vline 
WA_TKEPPLFUNC_STR-METHEXESET sy-vline 
WA_TKEPPLFUNC_STR-METHEXEGET sy-vline 
WA_TKEPPLFUNC_STR-METHCHK sy-vline 
WA_TKEPPLFUNC_STR-METHREAD sy-vline 
WA_TKEPPLFUNC_STR-METHPOST sy-vline 
WA_TKEPPLFUNC_STR-PARASET sy-vline 
WA_TKEPPLFUNC_STR-PARAGET sy-vline 
WA_TKEPPLFUNC_STR-PARAEXESET sy-vline 
WA_TKEPPLFUNC_STR-PARAEXEGET sy-vline 
WA_TKEPPLFUNC_STR-PARACHK sy-vline 
WA_TKEPPLFUNC_STR-PARAREAD sy-vline 
WA_TKEPPLFUNC_STR-PARAPOST sy-vline 
WA_TKEPPLFUNC_STR-AUTH sy-vline      INTO ld_text SEPARATED BY SPACE.

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