ABAP Select data from SAP table FKKINVBILL_S_DATA_GFN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKINVBILL_S_DATA_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 FKKINVBILL_S_DATA_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 FKKINVBILL_S_DATA_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_FKKINVBILL_S_DATA_GFN TYPE STANDARD TABLE OF FKKINVBILL_S_DATA_GFN,
      WA_FKKINVBILL_S_DATA_GFN TYPE FKKINVBILL_S_DATA_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: <FKKINVBILL_S_DATA_GFN> TYPE FKKINVBILL_S_DATA_GFN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINVBILL_S_DATA_GFN
*  INTO TABLE @DATA(IT_FKKINVBILL_S_DATA_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_FKKINVBILL_S_DATA_GFN INDEX 1 INTO DATA(WA_FKKINVBILL_S_DATA_GFN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINVBILL_S_DATA_GFN>-CABILLGGROUPINGSOURCEITEMS = 1.
<FKKINVBILL_S_DATA_GFN>-CABILLGRECORDTYPE = 1.
<FKKINVBILL_S_DATA_GFN>-CABILLGISDOCUMENTSIMULATED = 1.
<FKKINVBILL_S_DATA_GFN>-CABILLGDOCCREATIONDATE = 1.
<FKKINVBILL_S_DATA_GFN>-CACNSMPNITMCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMCLASS, sy-vline,
  WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMSTATUS, sy-vline,
  WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMRECORDTYPE, sy-vline,
  WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMDATABASETABLE, sy-vline,
  WA_FKKINVBILL_S_DATA_GFN-CABILLGGROUPINGBILLABLEITEM, sy-vline,
  WA_FKKINVBILL_S_DATA_GFN-CABILLGSUBPROCESS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINVBILL_S_DATA_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_FKKINVBILL_S_DATA_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_FKKINVBILL_S_DATA_GFN INTO WA_FKKINVBILL_S_DATA_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 CABUSINESSPARTNERORIGINAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKINVBILL_S_DATA_GFN-CABUSINESSPARTNERORIGINAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINVBILL_S_DATA_GFN-CABUSINESSPARTNERORIGINAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit PERI, internal->external for field CABLLBLEITMORIGINMONTH
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMORIGINMONTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMORIGINMONTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field CABLLBLEITMCREATIONMONTH
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMCREATIONMONTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMCREATIONMONTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CABLLBLEITMQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINVBILL_S_DATA_GFN-CABLLBLEITMQTYUNIT.
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_FKKINVBILL_S_DATA_GFN_STR, 
CABILLGGROUPINGSOURCEITEMS TYPE STRING,
CABILLGRECORDTYPE TYPE STRING,
CABILLGISDOCUMENTSIMULATED TYPE STRING,
CABILLGDOCCREATIONDATE TYPE STRING,
CACNSMPNITMCLASS TYPE STRING,
CABLLBLEITMCLASS TYPE STRING,
CABLLBLEITMSTATUS TYPE STRING,
CABLLBLEITMRECORDTYPE TYPE STRING,
CABLLBLEITMDATABASETABLE TYPE STRING,
CABILLGGROUPINGBILLABLEITEM TYPE STRING,
CABILLGSUBPROCESS TYPE STRING,
CABLLBLEITMTYPE TYPE STRING,
CABLLBLEITMSOURCETRANSTYPE TYPE STRING,
CABILLGSOURCETRANSREFTYPE TYPE STRING,
CABILLGSOURCETRANSREF TYPE STRING,
CAALTVMDORIGINALISENBLD TYPE STRING,
CABUSINESSPARTNERORIGINAL TYPE STRING,
CACONTRACTACCOUNTORIGINAL TYPE STRING,
CABLLBLEITMPRIMARY TYPE STRING,
CABLLBLEITMPRIMARYTYPE TYPE STRING,
CABLLBLEITMORIGINMONTH TYPE STRING,
CABLLBLEITMCREATIONMONTH TYPE STRING,
CABLLBLEITMAMOUNT TYPE STRING,
CABLLBLEITMCURRENCY TYPE STRING,
CABLLBLEITMQTY TYPE STRING,
CABLLBLEITMQTYUNIT TYPE STRING,
CABLLBLEITMNUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINVBILL_S_DATA_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_FKKINVBILL_S_DATA_GFN_STR-CABILLGGROUPINGSOURCEITEMS sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABILLGRECORDTYPE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABILLGISDOCUMENTSIMULATED sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABILLGDOCCREATIONDATE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CACNSMPNITMCLASS sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMCLASS sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMSTATUS sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMRECORDTYPE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMDATABASETABLE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABILLGGROUPINGBILLABLEITEM sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABILLGSUBPROCESS sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMTYPE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMSOURCETRANSTYPE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABILLGSOURCETRANSREFTYPE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABILLGSOURCETRANSREF sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CAALTVMDORIGINALISENBLD sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABUSINESSPARTNERORIGINAL sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CACONTRACTACCOUNTORIGINAL sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMPRIMARY sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMPRIMARYTYPE sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMORIGINMONTH sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMCREATIONMONTH sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMAMOUNT sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMCURRENCY sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMQTY sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMQTYUNIT sy-vline 
WA_FKKINVBILL_S_DATA_GFN_STR-CABLLBLEITMNUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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