ABAP Select data from SAP table FKKINV_TRIG_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_TRIG_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_TRIG_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_TRIG_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_TRIG_GFN TYPE STANDARD TABLE OF FKKINV_TRIG_GFN,
      WA_FKKINV_TRIG_GFN TYPE FKKINV_TRIG_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_TRIG_GFN> TYPE FKKINV_TRIG_GFN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINV_TRIG_GFN
*  INTO TABLE @DATA(IT_FKKINV_TRIG_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_TRIG_GFN INDEX 1 INTO DATA(WA_FKKINV_TRIG_GFN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINV_TRIG_GFN>-SAPCLIENT = 1.
<FKKINV_TRIG_GFN>-CAINVCGSOURCEDOCUMENTCAT = 1.
<FKKINV_TRIG_GFN>-CAINVCGSOURCEDOCUMENTNUMBER = 1.
<FKKINV_TRIG_GFN>-CAINVCGSOURCEDOCUMENTTYPE = 1.
<FKKINV_TRIG_GFN>-LOGICALSYSTEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINV_TRIG_GFN-CAAPPLICATIONAREA, sy-vline,
  WA_FKKINV_TRIG_GFN-CABILLGDOCORIGINPROCESS, sy-vline,
  WA_FKKINV_TRIG_GFN-CAINVCGREQSRCEPROCREF, sy-vline,
  WA_FKKINV_TRIG_GFN-CAINVCGTECHNICALDOCUMENTTYPE, sy-vline,
  WA_FKKINV_TRIG_GFN-CAINVCGTARGETPROCESS, sy-vline,
  WA_FKKINV_TRIG_GFN-COMPANYCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINV_TRIG_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_TRIG_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_TRIG_GFN INTO WA_FKKINV_TRIG_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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FKKINV_TRIG_GFN_STR, 
SAPCLIENT TYPE STRING,
CAINVCGSOURCEDOCUMENTCAT TYPE STRING,
CAINVCGSOURCEDOCUMENTNUMBER TYPE STRING,
CAINVCGSOURCEDOCUMENTTYPE TYPE STRING,
LOGICALSYSTEM TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
CABILLGDOCORIGINPROCESS TYPE STRING,
CAINVCGREQSRCEPROCREF TYPE STRING,
CAINVCGTECHNICALDOCUMENTTYPE TYPE STRING,
CAINVCGTARGETPROCESS TYPE STRING,
COMPANYCODE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CABUSINESSPARTNERDOCRLVT TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
CACONTRACTACCOUNTDOCRLVT TYPE STRING,
CAINVCGMASTERDATATYPE TYPE STRING,
CASRCEDOCBUSINESSPARTNER TYPE STRING,
CASRCEDOCCONTRACTACCOUNT TYPE STRING,
ALTVCONTRACTACCTFORCOLLVBILLS TYPE STRING,
CACONTRACT TYPE STRING,
CASUBAPPLICATION TYPE STRING,
BUSINESSPLACE TYPE STRING,
DIVISION TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CAAMOUNTSOURCEDOCUMENTCURRENCY TYPE STRING,
CAINVCGREQSTARTDATE TYPE STRING,
CAINVCGREQENDDATE TYPE STRING,
CAINVCGCATEGORY TYPE STRING,
CAINVCGCORRECTIONCATEGORY TYPE STRING,
CAPARTNERSETTLEMENTRULE TYPE STRING,
CABLLBLEITMCONTROLOFUNIT TYPE STRING,
CAINVCGDOCBASEDTEFORPERDASSGMT TYPE STRING,
CAINVCGFIRST TYPE STRING,
CASELNETDUEDATE TYPE STRING,
CAINVCGREQCREATIONUSER TYPE STRING,
CAINVCGREQCREATIONDATE TYPE STRING,
CASOURCEDOCUMENTCREATIONDATE TYPE STRING,
CASOURCEDOCUMENTNUMBEROFITEMS TYPE STRING,
CASUBAREAFORPARALLELIZATION TYPE STRING,
DOCUMENTISARCHIVED TYPE STRING,
CAOLDINVOICINGDOCUMENT TYPE STRING,
CAINVCGREQISLOCKEDFORINVOICING TYPE STRING,
CAINVCGREQISSIMULATED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINV_TRIG_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_TRIG_GFN_STR-SAPCLIENT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGSOURCEDOCUMENTCAT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGSOURCEDOCUMENTNUMBER sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGSOURCEDOCUMENTTYPE sy-vline 
WA_FKKINV_TRIG_GFN_STR-LOGICALSYSTEM sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAAPPLICATIONAREA sy-vline 
WA_FKKINV_TRIG_GFN_STR-CABILLGDOCORIGINPROCESS sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGREQSRCEPROCREF sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGTECHNICALDOCUMENTTYPE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGTARGETPROCESS sy-vline 
WA_FKKINV_TRIG_GFN_STR-COMPANYCODE sy-vline 
WA_FKKINV_TRIG_GFN_STR-BUSINESSPARTNER sy-vline 
WA_FKKINV_TRIG_GFN_STR-CABUSINESSPARTNERDOCRLVT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CONTRACTACCOUNT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CACONTRACTACCOUNTDOCRLVT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGMASTERDATATYPE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CASRCEDOCBUSINESSPARTNER sy-vline 
WA_FKKINV_TRIG_GFN_STR-CASRCEDOCCONTRACTACCOUNT sy-vline 
WA_FKKINV_TRIG_GFN_STR-ALTVCONTRACTACCTFORCOLLVBILLS sy-vline 
WA_FKKINV_TRIG_GFN_STR-CACONTRACT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CASUBAPPLICATION sy-vline 
WA_FKKINV_TRIG_GFN_STR-BUSINESSPLACE sy-vline 
WA_FKKINV_TRIG_GFN_STR-DIVISION sy-vline 
WA_FKKINV_TRIG_GFN_STR-TRANSACTIONCURRENCY sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAAMOUNTSOURCEDOCUMENTCURRENCY sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGREQSTARTDATE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGREQENDDATE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGCATEGORY sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGCORRECTIONCATEGORY sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAPARTNERSETTLEMENTRULE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CABLLBLEITMCONTROLOFUNIT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGDOCBASEDTEFORPERDASSGMT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGFIRST sy-vline 
WA_FKKINV_TRIG_GFN_STR-CASELNETDUEDATE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGREQCREATIONUSER sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGREQCREATIONDATE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CASOURCEDOCUMENTCREATIONDATE sy-vline 
WA_FKKINV_TRIG_GFN_STR-CASOURCEDOCUMENTNUMBEROFITEMS sy-vline 
WA_FKKINV_TRIG_GFN_STR-CASUBAREAFORPARALLELIZATION sy-vline 
WA_FKKINV_TRIG_GFN_STR-DOCUMENTISARCHIVED sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAOLDINVOICINGDOCUMENT sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGREQISLOCKEDFORINVOICING sy-vline 
WA_FKKINV_TRIG_GFN_STR-CAINVCGREQISSIMULATED sy-vline      INTO ld_text SEPARATED BY SPACE.

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