ABAP Select data from SAP table KFPK into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KFPK 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. 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 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 TYPE STANDARD TABLE OF KFPK,
      WA_KFPK TYPE KFPK,
      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> TYPE KFPK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KFPK
*  INTO TABLE @DATA(IT_KFPK2).
*--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 INDEX 1 INTO DATA(WA_KFPK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KFPK>-MANDT = 1.
<KFPK>-KOKRS = 1.
<KFPK>-BELNR = 1.
<KFPK>-BLTYP = 1.
<KFPK>-BLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KFPK-VRGNG, sy-vline,
  WA_KFPK-KERFAS, sy-vline,
  WA_KFPK-KERDAT, sy-vline,
  WA_KFPK-KAENDE, sy-vline,
  WA_KFPK-KAEDAT, sy-vline,
  WA_KFPK-BLDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KFPK 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 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 INTO WA_KFPK.


*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-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KFPK-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KFPK-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KFPK-LOGSYS.
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_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BLTYP TYPE STRING,
BLART TYPE STRING,
VRGNG TYPE STRING,
KERFAS TYPE STRING,
KERDAT TYPE STRING,
KAENDE TYPE STRING,
KAEDAT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
KTEXT TYPE STRING,
XBLNR TYPE STRING,
KLOEKZ TYPE STRING,
LTEXT TYPE STRING,
REFBNR TYPE STRING,
RAUFNR TYPE STRING,
RPSPNR TYPE STRING,
RNPLNR TYPE STRING,
RAUFPL TYPE STRING,
RAPLZL TYPE STRING,
RKOSTL TYPE STRING,
RKDAUF TYPE STRING,
RKDPOS TYPE STRING,
SAUFNR TYPE STRING,
SPSPNR TYPE STRING,
SNPLNR TYPE STRING,
SAUFPL TYPE STRING,
SAPLZL TYPE STRING,
SURSCH TYPE STRING,
FRGKZ TYPE STRING,
STFLG TYPE STRING,
STOKZ TYPE STRING,
STOBNR TYPE STRING,
LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KFPK_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_STR-MANDT sy-vline 
WA_KFPK_STR-KOKRS sy-vline 
WA_KFPK_STR-BELNR sy-vline 
WA_KFPK_STR-BLTYP sy-vline 
WA_KFPK_STR-BLART sy-vline 
WA_KFPK_STR-VRGNG sy-vline 
WA_KFPK_STR-KERFAS sy-vline 
WA_KFPK_STR-KERDAT sy-vline 
WA_KFPK_STR-KAENDE sy-vline 
WA_KFPK_STR-KAEDAT sy-vline 
WA_KFPK_STR-BLDAT sy-vline 
WA_KFPK_STR-BUDAT sy-vline 
WA_KFPK_STR-KTEXT sy-vline 
WA_KFPK_STR-XBLNR sy-vline 
WA_KFPK_STR-KLOEKZ sy-vline 
WA_KFPK_STR-LTEXT sy-vline 
WA_KFPK_STR-REFBNR sy-vline 
WA_KFPK_STR-RAUFNR sy-vline 
WA_KFPK_STR-RPSPNR sy-vline 
WA_KFPK_STR-RNPLNR sy-vline 
WA_KFPK_STR-RAUFPL sy-vline 
WA_KFPK_STR-RAPLZL sy-vline 
WA_KFPK_STR-RKOSTL sy-vline 
WA_KFPK_STR-RKDAUF sy-vline 
WA_KFPK_STR-RKDPOS sy-vline 
WA_KFPK_STR-SAUFNR sy-vline 
WA_KFPK_STR-SPSPNR sy-vline 
WA_KFPK_STR-SNPLNR sy-vline 
WA_KFPK_STR-SAUFPL sy-vline 
WA_KFPK_STR-SAPLZL sy-vline 
WA_KFPK_STR-SURSCH sy-vline 
WA_KFPK_STR-FRGKZ sy-vline 
WA_KFPK_STR-STFLG sy-vline 
WA_KFPK_STR-STOKZ sy-vline 
WA_KFPK_STR-STOBNR sy-vline 
WA_KFPK_STR-LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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