ABAP Select data from SAP table FKKINV_EXTBILLDOC_I into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKINV_EXTBILLDOC_I 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_EXTBILLDOC_I. 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_EXTBILLDOC_I 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_EXTBILLDOC_I TYPE STANDARD TABLE OF FKKINV_EXTBILLDOC_I,
      WA_FKKINV_EXTBILLDOC_I TYPE FKKINV_EXTBILLDOC_I,
      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_EXTBILLDOC_I> TYPE FKKINV_EXTBILLDOC_I.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINV_EXTBILLDOC_I
*  INTO TABLE @DATA(IT_FKKINV_EXTBILLDOC_I2).
*--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_EXTBILLDOC_I INDEX 1 INTO DATA(WA_FKKINV_EXTBILLDOC_I2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINV_EXTBILLDOC_I>-REFITEM = 1.
<FKKINV_EXTBILLDOC_I>-ITEMTYPE = 1.
<FKKINV_EXTBILLDOC_I>-BILL_AMOUNT = 1.
<FKKINV_EXTBILLDOC_I>-BILL_CURR = 1.
<FKKINV_EXTBILLDOC_I>-ITEM_SIMULATED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINV_EXTBILLDOC_I-POSTREL, sy-vline,
  WA_FKKINV_EXTBILLDOC_I-PRINTREL, sy-vline,
  WA_FKKINV_EXTBILLDOC_I-PRINT_SUBSTITUTE, sy-vline,
  WA_FKKINV_EXTBILLDOC_I-DATE_FROM, sy-vline,
  WA_FKKINV_EXTBILLDOC_I-DATE_TO, sy-vline,
  WA_FKKINV_EXTBILLDOC_I-FAEDN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINV_EXTBILLDOC_I 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_EXTBILLDOC_I 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_EXTBILLDOC_I INTO WA_FKKINV_EXTBILLDOC_I.


*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_FKKINV_EXTBILLDOC_I-QTY_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINV_EXTBILLDOC_I-QTY_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKINV_EXTBILLDOC_I-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINV_EXTBILLDOC_I-VTREF.
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_EXTBILLDOC_I_STR, 
REFITEM TYPE STRING,
ITEMTYPE TYPE STRING,
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,
FAEDN TYPE STRING,
SPART TYPE STRING,
BUKRS TYPE STRING,
HVORG TYPE STRING,
TVORG TYPE STRING,
KOFIZ TYPE STRING,
PA2640_POS_ID1 TYPE STRING,
PA2640_POS_ID2 TYPE STRING,
PA2640_POS_ID3 TYPE STRING,
PA2640_POS_ID4 TYPE STRING,
PA2640_POS_ID5 TYPE STRING,
PA2640_POS_ID6 TYPE STRING,
PA2640_POS_ID7 TYPE STRING,
PA2643_POS_ID1 TYPE STRING,
PA2643_POS_ID2 TYPE STRING,
PA2643_POS_ID3 TYPE STRING,
TAX_INCLUDED TYPE STRING,
TAX_GROUP TYPE STRING,
EXT_TAX_DATE TYPE STRING,
TAX_ID TYPE STRING,
QUANTITY TYPE STRING,
QTY_UNIT TYPE STRING,
QTY_BW_REL TYPE STRING,
QTY_FI_CO_REL TYPE STRING,
TXJCD TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
ADD_GROUP TYPE STRING,
PY_GROUP TYPE STRING,
XANZA TYPE STRING,
STAKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINV_EXTBILLDOC_I_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_EXTBILLDOC_I_STR-REFITEM sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-ITEMTYPE sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-BILL_AMOUNT sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-BILL_CURR sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-ITEM_SIMULATED sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-POSTREL sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PRINTREL sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PRINT_SUBSTITUTE sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-DATE_FROM sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-DATE_TO sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-FAEDN sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-SPART sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-BUKRS sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-HVORG sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-TVORG sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-KOFIZ sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2640_POS_ID1 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2640_POS_ID2 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2640_POS_ID3 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2640_POS_ID4 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2640_POS_ID5 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2640_POS_ID6 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2640_POS_ID7 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2643_POS_ID1 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2643_POS_ID2 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PA2643_POS_ID3 sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-TAX_INCLUDED sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-TAX_GROUP sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-EXT_TAX_DATE sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-TAX_ID sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-QUANTITY sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-QTY_UNIT sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-QTY_BW_REL sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-QTY_FI_CO_REL sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-TXJCD sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-VTREF sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-SUBAP sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-ADD_GROUP sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-PY_GROUP sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-XANZA sy-vline 
WA_FKKINV_EXTBILLDOC_I_STR-STAKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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