ABAP Select data from SAP table FKKINV_OFFSETITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKINV_OFFSETITEM 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_OFFSETITEM. 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_OFFSETITEM 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_OFFSETITEM TYPE STANDARD TABLE OF FKKINV_OFFSETITEM,
      WA_FKKINV_OFFSETITEM TYPE FKKINV_OFFSETITEM,
      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_OFFSETITEM> TYPE FKKINV_OFFSETITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINV_OFFSETITEM
*  INTO TABLE @DATA(IT_FKKINV_OFFSETITEM2).
*--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_OFFSETITEM INDEX 1 INTO DATA(WA_FKKINV_OFFSETITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINV_OFFSETITEM>-MANDT = 1.
<FKKINV_OFFSETITEM>-INVDOCNO = 1.
<FKKINV_OFFSETITEM>-INVDOCOITEM = 1.
<FKKINV_OFFSETITEM>-OFFSET_REFID = 1.
<FKKINV_OFFSETITEM>-OFFSET_CAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINV_OFFSETITEM-OFFSET_PROC, sy-vline,
  WA_FKKINV_OFFSETITEM-OFFSET_INVGR, sy-vline,
  WA_FKKINV_OFFSETITEM-OFFSET_STATUS, sy-vline,
  WA_FKKINV_OFFSETITEM-VTREF, sy-vline,
  WA_FKKINV_OFFSETITEM-VTPOS, sy-vline,
  WA_FKKINV_OFFSETITEM-SUBAP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINV_OFFSETITEM 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_OFFSETITEM 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_OFFSETITEM INTO WA_FKKINV_OFFSETITEM.


*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 VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKINV_OFFSETITEM-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINV_OFFSETITEM-VTREF.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SRCDOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKINV_OFFSETITEM-SRCDOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINV_OFFSETITEM-SRCDOCNO.
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_OFFSETITEM_STR, 
MANDT TYPE STRING,
INVDOCNO TYPE STRING,
INVDOCOITEM TYPE STRING,
OFFSET_REFID TYPE STRING,
OFFSET_CAT TYPE STRING,
OFFSET_PROC TYPE STRING,
OFFSET_INVGR TYPE STRING,
OFFSET_STATUS TYPE STRING,
VTREF TYPE STRING,
VTPOS TYPE STRING,
SUBAP TYPE STRING,
INVDOCNO_REQ TYPE STRING,
DATE_FROM_REQ TYPE STRING,
DATE_TO_REQ TYPE STRING,
OPBEL_REQ TYPE STRING,
OPUPW_REQ TYPE STRING,
OPUPK_REQ TYPE STRING,
OFFSET_ACTION TYPE STRING,
OFFSET_GROUP TYPE STRING,
SRCDOCCAT TYPE STRING,
SRCDOCNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINV_OFFSETITEM_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_OFFSETITEM_STR-MANDT sy-vline 
WA_FKKINV_OFFSETITEM_STR-INVDOCNO sy-vline 
WA_FKKINV_OFFSETITEM_STR-INVDOCOITEM sy-vline 
WA_FKKINV_OFFSETITEM_STR-OFFSET_REFID sy-vline 
WA_FKKINV_OFFSETITEM_STR-OFFSET_CAT sy-vline 
WA_FKKINV_OFFSETITEM_STR-OFFSET_PROC sy-vline 
WA_FKKINV_OFFSETITEM_STR-OFFSET_INVGR sy-vline 
WA_FKKINV_OFFSETITEM_STR-OFFSET_STATUS sy-vline 
WA_FKKINV_OFFSETITEM_STR-VTREF sy-vline 
WA_FKKINV_OFFSETITEM_STR-VTPOS sy-vline 
WA_FKKINV_OFFSETITEM_STR-SUBAP sy-vline 
WA_FKKINV_OFFSETITEM_STR-INVDOCNO_REQ sy-vline 
WA_FKKINV_OFFSETITEM_STR-DATE_FROM_REQ sy-vline 
WA_FKKINV_OFFSETITEM_STR-DATE_TO_REQ sy-vline 
WA_FKKINV_OFFSETITEM_STR-OPBEL_REQ sy-vline 
WA_FKKINV_OFFSETITEM_STR-OPUPW_REQ sy-vline 
WA_FKKINV_OFFSETITEM_STR-OPUPK_REQ sy-vline 
WA_FKKINV_OFFSETITEM_STR-OFFSET_ACTION sy-vline 
WA_FKKINV_OFFSETITEM_STR-OFFSET_GROUP sy-vline 
WA_FKKINV_OFFSETITEM_STR-SRCDOCCAT sy-vline 
WA_FKKINV_OFFSETITEM_STR-SRCDOCNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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