ABAP Select data from SAP table RKPFI 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 RKPFI 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 RKPFI. 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 RKPFI 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_RKPFI TYPE STANDARD TABLE OF RKPFI,
      WA_RKPFI TYPE RKPFI,
      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: <RKPFI> TYPE RKPFI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKPFI
*  INTO TABLE @DATA(IT_RKPFI2).
*--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_RKPFI INDEX 1 INTO DATA(WA_RKPFI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKPFI>-MANDT = 1.
<RKPFI>-KOKRS = 1.
<RKPFI>-BELNR = 1.
<RKPFI>-BUZEI = 1.
<RKPFI>-OBJNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKPFI-POSIT, sy-vline,
  WA_RKPFI-HKONT, sy-vline,
  WA_RKPFI-GJAHR, sy-vline,
  WA_RKPFI-PERIO, sy-vline,
  WA_RKPFI-WTGBTR, sy-vline,
  WA_RKPFI-WTGBTRO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKPFI 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_RKPFI 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_RKPFI INTO WA_RKPFI.


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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR1
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-GJAHR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-GJAHR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-BELNR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-BELNR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR2
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-GJAHR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-GJAHR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-BELNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-BELNR2.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-PSPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit OBART, internal->external for field OBJNR_ART
CALL FUNCTION 'CONVERSION_EXIT_OBART_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-OBJNR_ART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-OBJNR_ART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-FIPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSR
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-KURSR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-KURSR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-KURSF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSFIKRS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-KURSFIKRS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-KURSFIKRS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RKPFI-KBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RKPFI-KBLNR.
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_RKPFI_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
OBJNR TYPE STRING,
POSIT TYPE STRING,
HKONT TYPE STRING,
GJAHR TYPE STRING,
PERIO TYPE STRING,
WTGBTR TYPE STRING,
WTGBTRO TYPE STRING,
WOGBTR TYPE STRING,
WOGBTRO TYPE STRING,
WKGBTR TYPE STRING,
WKGBTRO TYPE STRING,
BUKRS1 TYPE STRING,
GJAHR1 TYPE STRING,
BELNR1 TYPE STRING,
BUZEI1 TYPE STRING,
BUKRS2 TYPE STRING,
GJAHR2 TYPE STRING,
BELNR2 TYPE STRING,
BUZEI2 TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ZEKKN TYPE STRING,
ETENRM TYPE STRING,
STUNR TYPE STRING,
WRTTP TYPE STRING,
VRGNG TYPE STRING,
VBUND TYPE STRING,
TWAER TYPE STRING,
ZHLDT TYPE STRING,
EINDT TYPE STRING,
SGTXT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
CPUDT TYPE STRING,
USNAM TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
GEBER TYPE STRING,
BLART TYPE STRING,
GSBER TYPE STRING,
BUKRS TYPE STRING,
FIKRS TYPE STRING,
AUFNR TYPE STRING,
POSID TYPE STRING,
PSPID TYPE STRING,
OBJNR_ART TYPE STRING,
OBJNR_ED TYPE STRING,
FIPOS TYPE STRING,
BWAER TYPE STRING,
OWAER TYPE STRING,
KWAER TYPE STRING,
ACTIV TYPE STRING,
SELKZ TYPE STRING,
WSDAT TYPE STRING,
KUFIX TYPE STRING,
GBETR TYPE STRING,
KURSR TYPE STRING,
KURSF TYPE STRING,
KURSFIKRS TYPE STRING,
UMBKZ TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,
XDELETE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKPFI_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_RKPFI_STR-MANDT sy-vline 
WA_RKPFI_STR-KOKRS sy-vline 
WA_RKPFI_STR-BELNR sy-vline 
WA_RKPFI_STR-BUZEI sy-vline 
WA_RKPFI_STR-OBJNR sy-vline 
WA_RKPFI_STR-POSIT sy-vline 
WA_RKPFI_STR-HKONT sy-vline 
WA_RKPFI_STR-GJAHR sy-vline 
WA_RKPFI_STR-PERIO sy-vline 
WA_RKPFI_STR-WTGBTR sy-vline 
WA_RKPFI_STR-WTGBTRO sy-vline 
WA_RKPFI_STR-WOGBTR sy-vline 
WA_RKPFI_STR-WOGBTRO sy-vline 
WA_RKPFI_STR-WKGBTR sy-vline 
WA_RKPFI_STR-WKGBTRO sy-vline 
WA_RKPFI_STR-BUKRS1 sy-vline 
WA_RKPFI_STR-GJAHR1 sy-vline 
WA_RKPFI_STR-BELNR1 sy-vline 
WA_RKPFI_STR-BUZEI1 sy-vline 
WA_RKPFI_STR-BUKRS2 sy-vline 
WA_RKPFI_STR-GJAHR2 sy-vline 
WA_RKPFI_STR-BELNR2 sy-vline 
WA_RKPFI_STR-BUZEI2 sy-vline 
WA_RKPFI_STR-EBELN sy-vline 
WA_RKPFI_STR-EBELP sy-vline 
WA_RKPFI_STR-ZEKKN sy-vline 
WA_RKPFI_STR-ETENRM sy-vline 
WA_RKPFI_STR-STUNR sy-vline 
WA_RKPFI_STR-WRTTP sy-vline 
WA_RKPFI_STR-VRGNG sy-vline 
WA_RKPFI_STR-VBUND sy-vline 
WA_RKPFI_STR-TWAER sy-vline 
WA_RKPFI_STR-ZHLDT sy-vline 
WA_RKPFI_STR-EINDT sy-vline 
WA_RKPFI_STR-SGTXT sy-vline 
WA_RKPFI_STR-BLDAT sy-vline 
WA_RKPFI_STR-BUDAT sy-vline 
WA_RKPFI_STR-CPUDT sy-vline 
WA_RKPFI_STR-USNAM sy-vline 
WA_RKPFI_STR-LIFNR sy-vline 
WA_RKPFI_STR-KUNNR sy-vline 
WA_RKPFI_STR-GEBER sy-vline 
WA_RKPFI_STR-BLART sy-vline 
WA_RKPFI_STR-GSBER sy-vline 
WA_RKPFI_STR-BUKRS sy-vline 
WA_RKPFI_STR-FIKRS sy-vline 
WA_RKPFI_STR-AUFNR sy-vline 
WA_RKPFI_STR-POSID sy-vline 
WA_RKPFI_STR-PSPID sy-vline 
WA_RKPFI_STR-OBJNR_ART sy-vline 
WA_RKPFI_STR-OBJNR_ED sy-vline 
WA_RKPFI_STR-FIPOS sy-vline 
WA_RKPFI_STR-BWAER sy-vline 
WA_RKPFI_STR-OWAER sy-vline 
WA_RKPFI_STR-KWAER sy-vline 
WA_RKPFI_STR-ACTIV sy-vline 
WA_RKPFI_STR-SELKZ sy-vline 
WA_RKPFI_STR-WSDAT sy-vline 
WA_RKPFI_STR-KUFIX sy-vline 
WA_RKPFI_STR-GBETR sy-vline 
WA_RKPFI_STR-KURSR sy-vline 
WA_RKPFI_STR-KURSF sy-vline 
WA_RKPFI_STR-KURSFIKRS sy-vline 
WA_RKPFI_STR-UMBKZ sy-vline 
WA_RKPFI_STR-KBLNR sy-vline 
WA_RKPFI_STR-KBLPOS sy-vline 
WA_RKPFI_STR-XDELETE sy-vline      INTO ld_text SEPARATED BY SPACE.

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