ABAP Select data from SAP table KFPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KFPE
*  INTO TABLE @DATA(IT_KFPE2).
*--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_KFPE INDEX 1 INTO DATA(WA_KFPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KFPE>-MANDT = 1.
<KFPE>-KOKRS = 1.
<KFPE>-BELNR = 1.
<KFPE>-BLPOS = 1.
<KFPE>-BPENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KFPE-VRGNG, sy-vline,
  WA_KFPE-ERFAS, sy-vline,
  WA_KFPE-ERDAT, sy-vline,
  WA_KFPE-VTEXT, sy-vline,
  WA_KFPE-ERLKZ, sy-vline,
  WA_KFPE-WTVER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KFPE 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_KFPE 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_KFPE INTO WA_KFPE.


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

*Conversion exit ALPHA, internal->external for field REFBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KFPE-REFBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KFPE-REFBNR.
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_KFPE_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BLPOS TYPE STRING,
BPENT TYPE STRING,
VRGNG TYPE STRING,
ERFAS TYPE STRING,
ERDAT TYPE STRING,
VTEXT TYPE STRING,
ERLKZ TYPE STRING,
WTVER TYPE STRING,
PRICE TYPE STRING,
MGVER TYPE STRING,
BUDAT TYPE STRING,
REFBNR TYPE STRING,
RBLPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KFPE_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_KFPE_STR-MANDT sy-vline 
WA_KFPE_STR-KOKRS sy-vline 
WA_KFPE_STR-BELNR sy-vline 
WA_KFPE_STR-BLPOS sy-vline 
WA_KFPE_STR-BPENT sy-vline 
WA_KFPE_STR-VRGNG sy-vline 
WA_KFPE_STR-ERFAS sy-vline 
WA_KFPE_STR-ERDAT sy-vline 
WA_KFPE_STR-VTEXT sy-vline 
WA_KFPE_STR-ERLKZ sy-vline 
WA_KFPE_STR-WTVER sy-vline 
WA_KFPE_STR-PRICE sy-vline 
WA_KFPE_STR-MGVER sy-vline 
WA_KFPE_STR-BUDAT sy-vline 
WA_KFPE_STR-REFBNR sy-vline 
WA_KFPE_STR-RBLPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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