ABAP Select data from SAP table KFPK_EXIT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KFPK_EXIT
*  INTO TABLE @DATA(IT_KFPK_EXIT2).
*--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_KFPK_EXIT INDEX 1 INTO DATA(WA_KFPK_EXIT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KFPK_EXIT>-KOKRS = 1.
<KFPK_EXIT>-BELNR = 1.
<KFPK_EXIT>-BLART = 1.
<KFPK_EXIT>-BLDAT = 1.
<KFPK_EXIT>-BUDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KFPK_EXIT-KTEXT, sy-vline,
  WA_KFPK_EXIT-WAERS, sy-vline,
  WA_KFPK_EXIT-VKSTAR, sy-vline,
  WA_KFPK_EXIT-VERLAR, sy-vline,
  WA_KFPK_EXIT-RAUFNR, sy-vline,
  WA_KFPK_EXIT-RPSPNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KFPK_EXIT 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_KFPK_EXIT 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_KFPK_EXIT INTO WA_KFPK_EXIT.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KFPK_EXIT-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KFPK_EXIT-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSP, internal->external for field RPSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_KFPK_EXIT-RPSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KFPK_EXIT-RPSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSP, internal->external for field SPSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_KFPK_EXIT-SPSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KFPK_EXIT-SPSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SNPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KFPK_EXIT-SNPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KFPK_EXIT-SNPLNR.
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_KFPK_EXIT_STR, 
KOKRS TYPE STRING,
BELNR TYPE STRING,
BLART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
KTEXT TYPE STRING,
WAERS TYPE STRING,
VKSTAR TYPE STRING,
VERLAR TYPE STRING,
RAUFNR TYPE STRING,
RPSPNR TYPE STRING,
RNPLNR TYPE STRING,
RAUFPL TYPE STRING,
RAPLZL TYPE STRING,
RKOSTL TYPE STRING,
SAUFNR TYPE STRING,
SPSPNR TYPE STRING,
SNPLNR TYPE STRING,
SAUFPL TYPE STRING,
SAPLZL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KFPK_EXIT_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_KFPK_EXIT_STR-KOKRS sy-vline 
WA_KFPK_EXIT_STR-BELNR sy-vline 
WA_KFPK_EXIT_STR-BLART sy-vline 
WA_KFPK_EXIT_STR-BLDAT sy-vline 
WA_KFPK_EXIT_STR-BUDAT sy-vline 
WA_KFPK_EXIT_STR-KTEXT sy-vline 
WA_KFPK_EXIT_STR-WAERS sy-vline 
WA_KFPK_EXIT_STR-VKSTAR sy-vline 
WA_KFPK_EXIT_STR-VERLAR sy-vline 
WA_KFPK_EXIT_STR-RAUFNR sy-vline 
WA_KFPK_EXIT_STR-RPSPNR sy-vline 
WA_KFPK_EXIT_STR-RNPLNR sy-vline 
WA_KFPK_EXIT_STR-RAUFPL sy-vline 
WA_KFPK_EXIT_STR-RAPLZL sy-vline 
WA_KFPK_EXIT_STR-RKOSTL sy-vline 
WA_KFPK_EXIT_STR-SAUFNR sy-vline 
WA_KFPK_EXIT_STR-SPSPNR sy-vline 
WA_KFPK_EXIT_STR-SNPLNR sy-vline 
WA_KFPK_EXIT_STR-SAUFPL sy-vline 
WA_KFPK_EXIT_STR-SAPLZL sy-vline      INTO ld_text SEPARATED BY SPACE.

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