ABAP Select data from SAP table FKKBIBILLDOCITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKBIBILLDOCITEM
*  INTO TABLE @DATA(IT_FKKBIBILLDOCITEM2).
*--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_FKKBIBILLDOCITEM INDEX 1 INTO DATA(WA_FKKBIBILLDOCITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKBIBILLDOCITEM>-BILL_AMOUNT = 1.
<FKKBIBILLDOCITEM>-BILL_CURR = 1.
<FKKBIBILLDOCITEM>-ITEM_SIMULATED = 1.
<FKKBIBILLDOCITEM>-POSTREL = 1.
<FKKBIBILLDOCITEM>-PRINTREL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKBIBILLDOCITEM-PRINT_SUBSTITUTE, sy-vline,
  WA_FKKBIBILLDOCITEM-DATE_FROM, sy-vline,
  WA_FKKBIBILLDOCITEM-DATE_TO, sy-vline,
  WA_FKKBIBILLDOCITEM-BUKRS, sy-vline,
  WA_FKKBIBILLDOCITEM-KOFIZ, sy-vline,
  WA_FKKBIBILLDOCITEM-TAX_GROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKBIBILLDOCITEM 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_FKKBIBILLDOCITEM 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_FKKBIBILLDOCITEM INTO WA_FKKBIBILLDOCITEM.


*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 CUNIT, internal->external for field QTY_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FKKBIBILLDOCITEM-QTY_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKBIBILLDOCITEM-QTY_UNIT.
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_FKKBIBILLDOCITEM_STR, 
BILL_AMOUNT TYPE STRING,
BILL_CURR TYPE STRING,
ITEM_SIMULATED TYPE STRING,
POSTREL TYPE STRING,
PRINTREL TYPE STRING,
PRINT_SUBSTITUTE TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
BUKRS TYPE STRING,
KOFIZ TYPE STRING,
TAX_GROUP TYPE STRING,
EXT_TAX_DATE TYPE STRING,
MWSKZ TYPE STRING,
STRKZ TYPE STRING,
TXJCD TYPE STRING,
QTY_UNIT TYPE STRING,
QTY_BW_REL TYPE STRING,
QTY_FI_CO_REL TYPE STRING,
QUANTITY_PDP TYPE STRING,
QUANTITY_ADP TYPE STRING,
BILLITEM_FROM TYPE STRING,
BILLITEM_TO TYPE STRING,
PY_GROUP TYPE STRING,
TAX_INCLUDED TYPE STRING,
DEFREV_CAT TYPE STRING,
DEFREV_PDATE TYPE STRING,
DEFREV_ACTION TYPE STRING,
DEFREV_CTYPE TYPE STRING,
DEFREV_ASSKY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKBIBILLDOCITEM_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_FKKBIBILLDOCITEM_STR-BILL_AMOUNT sy-vline 
WA_FKKBIBILLDOCITEM_STR-BILL_CURR sy-vline 
WA_FKKBIBILLDOCITEM_STR-ITEM_SIMULATED sy-vline 
WA_FKKBIBILLDOCITEM_STR-POSTREL sy-vline 
WA_FKKBIBILLDOCITEM_STR-PRINTREL sy-vline 
WA_FKKBIBILLDOCITEM_STR-PRINT_SUBSTITUTE sy-vline 
WA_FKKBIBILLDOCITEM_STR-DATE_FROM sy-vline 
WA_FKKBIBILLDOCITEM_STR-DATE_TO sy-vline 
WA_FKKBIBILLDOCITEM_STR-BUKRS sy-vline 
WA_FKKBIBILLDOCITEM_STR-KOFIZ sy-vline 
WA_FKKBIBILLDOCITEM_STR-TAX_GROUP sy-vline 
WA_FKKBIBILLDOCITEM_STR-EXT_TAX_DATE sy-vline 
WA_FKKBIBILLDOCITEM_STR-MWSKZ sy-vline 
WA_FKKBIBILLDOCITEM_STR-STRKZ sy-vline 
WA_FKKBIBILLDOCITEM_STR-TXJCD sy-vline 
WA_FKKBIBILLDOCITEM_STR-QTY_UNIT sy-vline 
WA_FKKBIBILLDOCITEM_STR-QTY_BW_REL sy-vline 
WA_FKKBIBILLDOCITEM_STR-QTY_FI_CO_REL sy-vline 
WA_FKKBIBILLDOCITEM_STR-QUANTITY_PDP sy-vline 
WA_FKKBIBILLDOCITEM_STR-QUANTITY_ADP sy-vline 
WA_FKKBIBILLDOCITEM_STR-BILLITEM_FROM sy-vline 
WA_FKKBIBILLDOCITEM_STR-BILLITEM_TO sy-vline 
WA_FKKBIBILLDOCITEM_STR-PY_GROUP sy-vline 
WA_FKKBIBILLDOCITEM_STR-TAX_INCLUDED sy-vline 
WA_FKKBIBILLDOCITEM_STR-DEFREV_CAT sy-vline 
WA_FKKBIBILLDOCITEM_STR-DEFREV_PDATE sy-vline 
WA_FKKBIBILLDOCITEM_STR-DEFREV_ACTION sy-vline 
WA_FKKBIBILLDOCITEM_STR-DEFREV_CTYPE sy-vline 
WA_FKKBIBILLDOCITEM_STR-DEFREV_ASSKY sy-vline      INTO ld_text SEPARATED BY SPACE.

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