ABAP Select data from SAP table FKKINV_KO_GFN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKINV_KO_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 FKKINV_KO_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 FKKINV_KO_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_FKKINV_KO_GFN TYPE STANDARD TABLE OF FKKINV_KO_GFN,
      WA_FKKINV_KO_GFN TYPE FKKINV_KO_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: <FKKINV_KO_GFN> TYPE FKKINV_KO_GFN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINV_KO_GFN
*  INTO TABLE @DATA(IT_FKKINV_KO_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_FKKINV_KO_GFN INDEX 1 INTO DATA(WA_FKKINV_KO_GFN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINV_KO_GFN>-CADOCUMENTNUMBER = 1.
<FKKINV_KO_GFN>-CARECONCILIATIONKEY = 1.
<FKKINV_KO_GFN>-CAAPPLICATIONAREA = 1.
<FKKINV_KO_GFN>-CADOCUMENTTYPE = 1.
<FKKINV_KO_GFN>-CADOCUMENTORIGINCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINV_KO_GFN-CREATEDBYUSER, sy-vline,
  WA_FKKINV_KO_GFN-CREATIONDATE, sy-vline,
  WA_FKKINV_KO_GFN-CREATIONTIME, sy-vline,
  WA_FKKINV_KO_GFN-TRANSACTIONCURRENCY, sy-vline,
  WA_FKKINV_KO_GFN-DOCUMENTDATE, sy-vline,
  WA_FKKINV_KO_GFN-CAPOSTINGDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINV_KO_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_FKKINV_KO_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_FKKINV_KO_GFN INTO WA_FKKINV_KO_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 EXCRT, internal->external for field CAEXCHANGERATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FKKINV_KO_GFN-CAEXCHANGERATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINV_KO_GFN-CAEXCHANGERATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field TAXEXCHANGERATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FKKINV_KO_GFN-TAXEXCHANGERATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINV_KO_GFN-TAXEXCHANGERATE.
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_FKKINV_KO_GFN_STR, 
CADOCUMENTNUMBER TYPE STRING,
CARECONCILIATIONKEY TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
CADOCUMENTTYPE TYPE STRING,
CADOCUMENTORIGINCODE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
DOCUMENTDATE TYPE STRING,
CAPOSTINGDATE TYPE STRING,
EXCHANGERATEDATE TYPE STRING,
CAREFERENCEDOCUMENT TYPE STRING,
CARETURNREASON TYPE STRING,
CAPOSTINGREASON TYPE STRING,
CASEPARATEDOCISCREATEDINGL TYPE STRING,
DOCCRTEDBYFRGNCRCYVALNORRECLFN TYPE STRING,
REFERENCEDOCUMENTTYPE TYPE STRING,
ORIGINALREFERENCEDOCUMENT TYPE STRING,
CAREVERSEDDOCUMENTNUMBER TYPE STRING,
CAINTERNALREVERSALMETHOD TYPE STRING,
CADOCUMENTCLASS TYPE STRING,
CACLEARINGINFORMATION TYPE STRING,
CATAXCOMPANYCODE TYPE STRING,
CAREVERSALDOCUMENTNUMBER TYPE STRING,
CADOCUMENTSUPPLEMENTS TYPE STRING,
CADOCUMENTISSAMPLE TYPE STRING,
LOGICALSYSTEM TYPE STRING,
CADOCUMENTVERSION TYPE STRING,
BUSINESSPLACE TYPE STRING,
CAWORKFLOWCHECKREASON TYPE STRING,
CAWORKFLOWCHECKPROCESS TYPE STRING,
CADOCUMENTTRANSACTIONCLASS TYPE STRING,
CADOCUMENTTYPEFORGLTRANSFER TYPE STRING,
CADOCCONTAINSCASHFLOWITEMS TYPE STRING,
CAIDNOFPARTMSGFROMCREDITMGMT TYPE STRING,
CASTORAGELOCATIONOFTAXSUPLMNT TYPE STRING,
CATAXCODEWASEXCHANGED TYPE STRING,
TAXREPORTINGDATE TYPE STRING,
DOCUMENTISREADFROMARCHIVE TYPE STRING,
CAREQUESTEDPERIODFORGLTRANSFER TYPE STRING,
ISINDIVIDUALPOSTING TYPE STRING,
CASUBAREAFORPARALLELIZATION TYPE STRING,
CACLASSIFICATIONKEY TYPE STRING,
DATAAGINGOBJECT TYPE STRING,
CADOCUMENTISAGED TYPE STRING,
TAXFULFILLMENTDATE TYPE STRING,
CAEXCHANGERATE TYPE STRING,
TAXEXCHANGERATE TYPE STRING,
CADOCUMENTGRPGOFBILLGDOC TYPE STRING,
CAINTCOCOMPANYCODEREQUESTING TYPE STRING,
CAINTCOCOMPANYCODESUPPLYING TYPE STRING,
CAINTCOTYPE TYPE STRING,
CAINTCOPROCEDURE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINV_KO_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_FKKINV_KO_GFN_STR-CADOCUMENTNUMBER sy-vline 
WA_FKKINV_KO_GFN_STR-CARECONCILIATIONKEY sy-vline 
WA_FKKINV_KO_GFN_STR-CAAPPLICATIONAREA sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTTYPE sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTORIGINCODE sy-vline 
WA_FKKINV_KO_GFN_STR-CREATEDBYUSER sy-vline 
WA_FKKINV_KO_GFN_STR-CREATIONDATE sy-vline 
WA_FKKINV_KO_GFN_STR-CREATIONTIME sy-vline 
WA_FKKINV_KO_GFN_STR-TRANSACTIONCURRENCY sy-vline 
WA_FKKINV_KO_GFN_STR-DOCUMENTDATE sy-vline 
WA_FKKINV_KO_GFN_STR-CAPOSTINGDATE sy-vline 
WA_FKKINV_KO_GFN_STR-EXCHANGERATEDATE sy-vline 
WA_FKKINV_KO_GFN_STR-CAREFERENCEDOCUMENT sy-vline 
WA_FKKINV_KO_GFN_STR-CARETURNREASON sy-vline 
WA_FKKINV_KO_GFN_STR-CAPOSTINGREASON sy-vline 
WA_FKKINV_KO_GFN_STR-CASEPARATEDOCISCREATEDINGL sy-vline 
WA_FKKINV_KO_GFN_STR-DOCCRTEDBYFRGNCRCYVALNORRECLFN sy-vline 
WA_FKKINV_KO_GFN_STR-REFERENCEDOCUMENTTYPE sy-vline 
WA_FKKINV_KO_GFN_STR-ORIGINALREFERENCEDOCUMENT sy-vline 
WA_FKKINV_KO_GFN_STR-CAREVERSEDDOCUMENTNUMBER sy-vline 
WA_FKKINV_KO_GFN_STR-CAINTERNALREVERSALMETHOD sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTCLASS sy-vline 
WA_FKKINV_KO_GFN_STR-CACLEARINGINFORMATION sy-vline 
WA_FKKINV_KO_GFN_STR-CATAXCOMPANYCODE sy-vline 
WA_FKKINV_KO_GFN_STR-CAREVERSALDOCUMENTNUMBER sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTSUPPLEMENTS sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTISSAMPLE sy-vline 
WA_FKKINV_KO_GFN_STR-LOGICALSYSTEM sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTVERSION sy-vline 
WA_FKKINV_KO_GFN_STR-BUSINESSPLACE sy-vline 
WA_FKKINV_KO_GFN_STR-CAWORKFLOWCHECKREASON sy-vline 
WA_FKKINV_KO_GFN_STR-CAWORKFLOWCHECKPROCESS sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTTRANSACTIONCLASS sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTTYPEFORGLTRANSFER sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCCONTAINSCASHFLOWITEMS sy-vline 
WA_FKKINV_KO_GFN_STR-CAIDNOFPARTMSGFROMCREDITMGMT sy-vline 
WA_FKKINV_KO_GFN_STR-CASTORAGELOCATIONOFTAXSUPLMNT sy-vline 
WA_FKKINV_KO_GFN_STR-CATAXCODEWASEXCHANGED sy-vline 
WA_FKKINV_KO_GFN_STR-TAXREPORTINGDATE sy-vline 
WA_FKKINV_KO_GFN_STR-DOCUMENTISREADFROMARCHIVE sy-vline 
WA_FKKINV_KO_GFN_STR-CAREQUESTEDPERIODFORGLTRANSFER sy-vline 
WA_FKKINV_KO_GFN_STR-ISINDIVIDUALPOSTING sy-vline 
WA_FKKINV_KO_GFN_STR-CASUBAREAFORPARALLELIZATION sy-vline 
WA_FKKINV_KO_GFN_STR-CACLASSIFICATIONKEY sy-vline 
WA_FKKINV_KO_GFN_STR-DATAAGINGOBJECT sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTISAGED sy-vline 
WA_FKKINV_KO_GFN_STR-TAXFULFILLMENTDATE sy-vline 
WA_FKKINV_KO_GFN_STR-CAEXCHANGERATE sy-vline 
WA_FKKINV_KO_GFN_STR-TAXEXCHANGERATE sy-vline 
WA_FKKINV_KO_GFN_STR-CADOCUMENTGRPGOFBILLGDOC sy-vline 
WA_FKKINV_KO_GFN_STR-CAINTCOCOMPANYCODEREQUESTING sy-vline 
WA_FKKINV_KO_GFN_STR-CAINTCOCOMPANYCODESUPPLYING sy-vline 
WA_FKKINV_KO_GFN_STR-CAINTCOTYPE sy-vline 
WA_FKKINV_KO_GFN_STR-CAINTCOPROCEDURE sy-vline      INTO ld_text SEPARATED BY SPACE.

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