ABAP Select data from SAP table RFKI1_GFN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFKI1_GFN 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 RFKI1_GFN. 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 RFKI1_GFN 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_RFKI1_GFN TYPE STANDARD TABLE OF RFKI1_GFN,
      WA_RFKI1_GFN TYPE RFKI1_GFN,
      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: <RFKI1_GFN> TYPE RFKI1_GFN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFKI1_GFN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFKI1_GFN
  INTO TABLE IT_RFKI1_GFN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKI1_GFN
*  INTO TABLE @DATA(IT_RFKI1_GFN2).
*--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_RFKI1_GFN INDEX 1 INTO DATA(WA_RFKI1_GFN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFKI1_GFN ASSIGNING <RFKI1_GFN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKI1_GFN>-CADOCUMENTORIGINCODE = 1.
<RFKI1_GFN>-CAPOSTINGDATE = 1.
<RFKI1_GFN>-DOCUMENTDATE = 1.
<RFKI1_GFN>-CAISSUEDATE = 1.
<RFKI1_GFN>-CADOCUMENTTYPE = 1.

ENDLOOP.

LOOP AT IT_RFKI1_GFN INTO WA_RFKI1_GFN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKI1_GFN-TRANSACTIONCURRENCY, sy-vline,
  WA_RFKI1_GFN-CASTATISTICALITEMCODE, sy-vline,
  WA_RFKI1_GFN-CACLEARINGRESTRICTIONCODE, sy-vline,
  WA_RFKI1_GFN-CARECONCILIATIONKEY, sy-vline,
  WA_RFKI1_GFN-CASEPARATEDOCISCREATEDINGL, sy-vline,
  WA_RFKI1_GFN-BUSINESSPARTNER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKI1_GFN 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_RFKI1_GFN 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_RFKI1_GFN INTO WA_RFKI1_GFN.


*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 BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1_GFN-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1_GFN-BUSINESSPARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONTRACTACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1_GFN-CONTRACTACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1_GFN-CONTRACTACCOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CACONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1_GFN-CACONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1_GFN-CACONTRACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CAINSTALLMENTPLAN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1_GFN-CAINSTALLMENTPLAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1_GFN-CAINSTALLMENTPLAN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CAINTERESTDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1_GFN-CAINTERESTDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1_GFN-CAINTERESTDOCUMENT.
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_RFKI1_GFN_STR, 
CADOCUMENTORIGINCODE TYPE STRING,
CAPOSTINGDATE TYPE STRING,
DOCUMENTDATE TYPE STRING,
CAISSUEDATE TYPE STRING,
CADOCUMENTTYPE TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CASTATISTICALITEMCODE TYPE STRING,
CACLEARINGRESTRICTIONCODE TYPE STRING,
CARECONCILIATIONKEY TYPE STRING,
CASEPARATEDOCISCREATEDINGL TYPE STRING,
BUSINESSPARTNER TYPE STRING,
COMPANYCODE TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
CACONTRACT TYPE STRING,
CASUBAPPLICATION TYPE STRING,
CAINTERESTCODE TYPE STRING,
CANETDUEDATE TYPE STRING,
CABPITEMTEXT TYPE STRING,
CAINSTALLMENTPLAN TYPE STRING,
CAONLYDAYSOVRDARETKNINTOACCT TYPE STRING,
CAINTERESTDOCUMENT TYPE STRING,
CAINTERESTCALCULATIONTODATE TYPE STRING,
CAINTERESTCALCULATIONENDDATE TYPE STRING,
CAINTERESTCALCULATIONSTARTDATE TYPE STRING,
CAINTRSTISCALCDONLYFOROPENITMS TYPE STRING,
CAINTERESTISCALCDFORALLITEMS TYPE STRING,
CAINTRSTISCALCDONLYFORCLRDITMS TYPE STRING,
CAINTERESTISCALCDFORCREDITITMS TYPE STRING,
CAINTERESTISCALCDFORDEBITITMS TYPE STRING,
CAINTRSTISCALCDFORCREDITDEBIT TYPE STRING,
CAINTRSTISCALCDFORCASHSCRTYDEP TYPE STRING,
CAINTERESTISCREATEDBYLOAN TYPE STRING,
CAINTERESTCALCROUNDINGCODE TYPE STRING,
CAINSTLMNTPLANINTRSTCALCTYPE TYPE STRING,
CAINTRSTISCALCDFORINSTLMNTPLAN TYPE STRING,
CAINTERESTISCALCDFORNETAMOUNTS TYPE STRING,
CACLRGRSTRCNCSHSCRTYDEPINTRST TYPE STRING,
CAINTERESTHASNOINTRSTONARREARS TYPE STRING,
CADIFFNTINTRSTDOCPERCONTRACCT TYPE STRING,
CADOCUMENTISSAMPLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKI1_GFN_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_RFKI1_GFN_STR-CADOCUMENTORIGINCODE sy-vline 
WA_RFKI1_GFN_STR-CAPOSTINGDATE sy-vline 
WA_RFKI1_GFN_STR-DOCUMENTDATE sy-vline 
WA_RFKI1_GFN_STR-CAISSUEDATE sy-vline 
WA_RFKI1_GFN_STR-CADOCUMENTTYPE sy-vline 
WA_RFKI1_GFN_STR-TRANSACTIONCURRENCY sy-vline 
WA_RFKI1_GFN_STR-CASTATISTICALITEMCODE sy-vline 
WA_RFKI1_GFN_STR-CACLEARINGRESTRICTIONCODE sy-vline 
WA_RFKI1_GFN_STR-CARECONCILIATIONKEY sy-vline 
WA_RFKI1_GFN_STR-CASEPARATEDOCISCREATEDINGL sy-vline 
WA_RFKI1_GFN_STR-BUSINESSPARTNER sy-vline 
WA_RFKI1_GFN_STR-COMPANYCODE sy-vline 
WA_RFKI1_GFN_STR-CONTRACTACCOUNT sy-vline 
WA_RFKI1_GFN_STR-CACONTRACT sy-vline 
WA_RFKI1_GFN_STR-CASUBAPPLICATION sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTCODE sy-vline 
WA_RFKI1_GFN_STR-CANETDUEDATE sy-vline 
WA_RFKI1_GFN_STR-CABPITEMTEXT sy-vline 
WA_RFKI1_GFN_STR-CAINSTALLMENTPLAN sy-vline 
WA_RFKI1_GFN_STR-CAONLYDAYSOVRDARETKNINTOACCT sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTDOCUMENT sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTCALCULATIONTODATE sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTCALCULATIONENDDATE sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTCALCULATIONSTARTDATE sy-vline 
WA_RFKI1_GFN_STR-CAINTRSTISCALCDONLYFOROPENITMS sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTISCALCDFORALLITEMS sy-vline 
WA_RFKI1_GFN_STR-CAINTRSTISCALCDONLYFORCLRDITMS sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTISCALCDFORCREDITITMS sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTISCALCDFORDEBITITMS sy-vline 
WA_RFKI1_GFN_STR-CAINTRSTISCALCDFORCREDITDEBIT sy-vline 
WA_RFKI1_GFN_STR-CAINTRSTISCALCDFORCASHSCRTYDEP sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTISCREATEDBYLOAN sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTCALCROUNDINGCODE sy-vline 
WA_RFKI1_GFN_STR-CAINSTLMNTPLANINTRSTCALCTYPE sy-vline 
WA_RFKI1_GFN_STR-CAINTRSTISCALCDFORINSTLMNTPLAN sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTISCALCDFORNETAMOUNTS sy-vline 
WA_RFKI1_GFN_STR-CACLRGRSTRCNCSHSCRTYDEPINTRST sy-vline 
WA_RFKI1_GFN_STR-CAINTERESTHASNOINTRSTONARREARS sy-vline 
WA_RFKI1_GFN_STR-CADIFFNTINTRSTDOCPERCONTRACCT sy-vline 
WA_RFKI1_GFN_STR-CADOCUMENTISSAMPLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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