ABAP Select data from SAP table FKKNRPLST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKNRPLST
*  INTO TABLE @DATA(IT_FKKNRPLST2).
*--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_FKKNRPLST INDEX 1 INTO DATA(WA_FKKNRPLST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKNRPLST>-POSNA = 1.
<FKKNRPLST>-STANP = 1.
<FKKNRPLST>-FLINS = 1.
<FKKNRPLST>-GPART = 1.
<FKKNRPLST>-VKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKNRPLST-VTREF, sy-vline,
  WA_FKKNRPLST-SUBAP, sy-vline,
  WA_FKKNRPLST-BKVID, sy-vline,
  WA_FKKNRPLST-VALDT, sy-vline,
  WA_FKKNRPLST-BKVID_DEL, sy-vline,
  WA_FKKNRPLST-ABWGP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKNRPLST 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_FKKNRPLST 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_FKKNRPLST INTO WA_FKKNRPLST.


*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.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKNRPLST-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKNRPLST-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKNRPLST-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKNRPLST-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKNRPLST-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKNRPLST-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWGP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKNRPLST-ABWGP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKNRPLST-ABWGP.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FKKNRPLST_STR, 
POSNA TYPE STRING,
STANP TYPE STRING,
FLINS TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
BKVID TYPE STRING,
VALDT TYPE STRING,
BKVID_DEL TYPE STRING,
ABWGP TYPE STRING,
BANKS_O TYPE STRING,
BANKL_O TYPE STRING,
BANKN_O TYPE STRING,
BKONT_O TYPE STRING,
BKREF_O TYPE STRING,
KOINH_O TYPE STRING,
IBAN_O TYPE STRING,
BANKS_N TYPE STRING,
BANKL_N TYPE STRING,
BANKN_N TYPE STRING,
BKONT_N TYPE STRING,
BKREF_N TYPE STRING,
KOINH_N TYPE STRING,
IBAN_N TYPE STRING,
NAME_LAST TYPE STRING,
NAME_FIRST TYPE STRING,
ERTXT TYPE STRING,
INFOF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKNRPLST_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_FKKNRPLST_STR-POSNA sy-vline 
WA_FKKNRPLST_STR-STANP sy-vline 
WA_FKKNRPLST_STR-FLINS sy-vline 
WA_FKKNRPLST_STR-GPART sy-vline 
WA_FKKNRPLST_STR-VKONT sy-vline 
WA_FKKNRPLST_STR-VTREF sy-vline 
WA_FKKNRPLST_STR-SUBAP sy-vline 
WA_FKKNRPLST_STR-BKVID sy-vline 
WA_FKKNRPLST_STR-VALDT sy-vline 
WA_FKKNRPLST_STR-BKVID_DEL sy-vline 
WA_FKKNRPLST_STR-ABWGP sy-vline 
WA_FKKNRPLST_STR-BANKS_O sy-vline 
WA_FKKNRPLST_STR-BANKL_O sy-vline 
WA_FKKNRPLST_STR-BANKN_O sy-vline 
WA_FKKNRPLST_STR-BKONT_O sy-vline 
WA_FKKNRPLST_STR-BKREF_O sy-vline 
WA_FKKNRPLST_STR-KOINH_O sy-vline 
WA_FKKNRPLST_STR-IBAN_O sy-vline 
WA_FKKNRPLST_STR-BANKS_N sy-vline 
WA_FKKNRPLST_STR-BANKL_N sy-vline 
WA_FKKNRPLST_STR-BANKN_N sy-vline 
WA_FKKNRPLST_STR-BKONT_N sy-vline 
WA_FKKNRPLST_STR-BKREF_N sy-vline 
WA_FKKNRPLST_STR-KOINH_N sy-vline 
WA_FKKNRPLST_STR-IBAN_N sy-vline 
WA_FKKNRPLST_STR-NAME_LAST sy-vline 
WA_FKKNRPLST_STR-NAME_FIRST sy-vline 
WA_FKKNRPLST_STR-ERTXT sy-vline 
WA_FKKNRPLST_STR-INFOF sy-vline      INTO ld_text SEPARATED BY SPACE.

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