ABAP Select data from SAP table ISHADOWITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISHADOWITEM
*  INTO TABLE @DATA(IT_ISHADOWITEM2).
*--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_ISHADOWITEM INDEX 1 INTO DATA(WA_ISHADOWITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISHADOWITEM>-MANDT = 1.
<ISHADOWITEM>-CONTRACTNUM = 1.
<ISHADOWITEM>-CONTRACTITEM = 1.
<ISHADOWITEM>-CONTRACTCOMMODITYITEM = 1.
<ISHADOWITEM>-DOCUMENTSIDE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISHADOWITEM-DOCUMENTCATEGORY, sy-vline,
  WA_ISHADOWITEM-CONTRACTITEMORIGINALQUANTITY, sy-vline,
  WA_ISHADOWITEM-CONTRACTITEMCONSUMEDQUANTITY, sy-vline,
  WA_ISHADOWITEM-BASEUNITOFMEASURE, sy-vline,
  WA_ISHADOWITEM-ITEMUOM, sy-vline,
  WA_ISHADOWITEM-NUMERATOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISHADOWITEM 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_ISHADOWITEM 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_ISHADOWITEM INTO WA_ISHADOWITEM.


*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 BASEUNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISHADOWITEM-BASEUNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISHADOWITEM-BASEUNITOFMEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ITEMUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISHADOWITEM-ITEMUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISHADOWITEM-ITEMUOM.
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_ISHADOWITEM_STR, 
MANDT TYPE STRING,
CONTRACTNUM TYPE STRING,
CONTRACTITEM TYPE STRING,
CONTRACTCOMMODITYITEM TYPE STRING,
DOCUMENTSIDE TYPE STRING,
DOCUMENTCATEGORY TYPE STRING,
CONTRACTITEMORIGINALQUANTITY TYPE STRING,
CONTRACTITEMCONSUMEDQUANTITY TYPE STRING,
BASEUNITOFMEASURE TYPE STRING,
ITEMUOM TYPE STRING,
NUMERATOR TYPE STRING,
DENOMINATOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISHADOWITEM_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_ISHADOWITEM_STR-MANDT sy-vline 
WA_ISHADOWITEM_STR-CONTRACTNUM sy-vline 
WA_ISHADOWITEM_STR-CONTRACTITEM sy-vline 
WA_ISHADOWITEM_STR-CONTRACTCOMMODITYITEM sy-vline 
WA_ISHADOWITEM_STR-DOCUMENTSIDE sy-vline 
WA_ISHADOWITEM_STR-DOCUMENTCATEGORY sy-vline 
WA_ISHADOWITEM_STR-CONTRACTITEMORIGINALQUANTITY sy-vline 
WA_ISHADOWITEM_STR-CONTRACTITEMCONSUMEDQUANTITY sy-vline 
WA_ISHADOWITEM_STR-BASEUNITOFMEASURE sy-vline 
WA_ISHADOWITEM_STR-ITEMUOM sy-vline 
WA_ISHADOWITEM_STR-NUMERATOR sy-vline 
WA_ISHADOWITEM_STR-DENOMINATOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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