ABAP Select data from SAP table IITEMDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IITEMDATA
*  INTO TABLE @DATA(IT_IITEMDATA2).
*--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_IITEMDATA INDEX 1 INTO DATA(WA_IITEMDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IITEMDATA>-MANDT = 1.
<IITEMDATA>-EQUIPMENT = 1.
<IITEMDATA>-DFSMAINTFUNCTIONALLOCATION = 1.
<IITEMDATA>-MAINTENANCEITEM = 1.
<IITEMDATA>-MAINTENANCECALLNEXTPLANNEDDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IITEMDATA-MAINTENANCECALL, sy-vline,
  WA_IITEMDATA-MAINTENANCEPLAN, sy-vline,
  WA_IITEMDATA-MAINTENANCEPLANDESC, sy-vline,
  WA_IITEMDATA-EQUIPMENTNAME, sy-vline,
  WA_IITEMDATA-FUNCTIONALLOCATIONNAME, sy-vline,
  WA_IITEMDATA-MAINTENANCEITEMDESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IITEMDATA 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_IITEMDATA 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_IITEMDATA INTO WA_IITEMDATA.


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

*Conversion exit CUNIT, internal->external for field MEASUREMENTRANGEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IITEMDATA-MEASUREMENTRANGEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IITEMDATA-MEASUREMENTRANGEUNIT.
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_IITEMDATA_STR, 
MANDT TYPE STRING,
EQUIPMENT TYPE STRING,
DFSMAINTFUNCTIONALLOCATION TYPE STRING,
MAINTENANCEITEM TYPE STRING,
MAINTENANCECALLNEXTPLANNEDDATE TYPE STRING,
MAINTENANCECALL TYPE STRING,
MAINTENANCEPLAN TYPE STRING,
MAINTENANCEPLANDESC TYPE STRING,
EQUIPMENTNAME TYPE STRING,
FUNCTIONALLOCATIONNAME TYPE STRING,
MAINTENANCEITEMDESCRIPTION TYPE STRING,
MEASURINGPOINT TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINWORKCENTERINTERNALID TYPE STRING,
MEASUREMENTDOCUMENT TYPE STRING,
MAINTENANCEPACKAGE TYPE STRING,
MEASUREMENTRANGEUNIT TYPE STRING,
UNITOFMEASURETECHNICALNAME TYPE STRING,
SIUNITCNVRSNRATEDENOMINATOR TYPE STRING,
SIUNITCNVRSNRATENUMERATOR TYPE STRING,
MEASUREMENTREADINGINENTRYUOM TYPE STRING,
CURRENTDATE TYPE STRING,
BASICSTARTDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
DFSMAINTMSMTRMNGDAYSVALUE TYPE STRING,
DFSMAINTEXPLOSIONTYPE TYPE STRING,
DFSMAINTEQUIPMENTUTILIZERID TYPE STRING,
MAINTPLANFREEDEFINEDATTRIB TYPE STRING,
DFSMAINTMSMTRMNGRDNGSVALUE TYPE STRING,
MAINTCALLNEXTPLNDCNTRRDNG TYPE STRING,
TECHOBJECTWITHLEADINGZEROS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IITEMDATA_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_IITEMDATA_STR-MANDT sy-vline 
WA_IITEMDATA_STR-EQUIPMENT sy-vline 
WA_IITEMDATA_STR-DFSMAINTFUNCTIONALLOCATION sy-vline 
WA_IITEMDATA_STR-MAINTENANCEITEM sy-vline 
WA_IITEMDATA_STR-MAINTENANCECALLNEXTPLANNEDDATE sy-vline 
WA_IITEMDATA_STR-MAINTENANCECALL sy-vline 
WA_IITEMDATA_STR-MAINTENANCEPLAN sy-vline 
WA_IITEMDATA_STR-MAINTENANCEPLANDESC sy-vline 
WA_IITEMDATA_STR-EQUIPMENTNAME sy-vline 
WA_IITEMDATA_STR-FUNCTIONALLOCATIONNAME sy-vline 
WA_IITEMDATA_STR-MAINTENANCEITEMDESCRIPTION sy-vline 
WA_IITEMDATA_STR-MEASURINGPOINT sy-vline 
WA_IITEMDATA_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_IITEMDATA_STR-MAINWORKCENTERINTERNALID sy-vline 
WA_IITEMDATA_STR-MEASUREMENTDOCUMENT sy-vline 
WA_IITEMDATA_STR-MAINTENANCEPACKAGE sy-vline 
WA_IITEMDATA_STR-MEASUREMENTRANGEUNIT sy-vline 
WA_IITEMDATA_STR-UNITOFMEASURETECHNICALNAME sy-vline 
WA_IITEMDATA_STR-SIUNITCNVRSNRATEDENOMINATOR sy-vline 
WA_IITEMDATA_STR-SIUNITCNVRSNRATENUMERATOR sy-vline 
WA_IITEMDATA_STR-MEASUREMENTREADINGINENTRYUOM sy-vline 
WA_IITEMDATA_STR-CURRENTDATE sy-vline 
WA_IITEMDATA_STR-BASICSTARTDATE sy-vline 
WA_IITEMDATA_STR-CREATEDBYUSER sy-vline 
WA_IITEMDATA_STR-CREATIONDATE sy-vline 
WA_IITEMDATA_STR-DFSMAINTMSMTRMNGDAYSVALUE sy-vline 
WA_IITEMDATA_STR-DFSMAINTEXPLOSIONTYPE sy-vline 
WA_IITEMDATA_STR-DFSMAINTEQUIPMENTUTILIZERID sy-vline 
WA_IITEMDATA_STR-MAINTPLANFREEDEFINEDATTRIB sy-vline 
WA_IITEMDATA_STR-DFSMAINTMSMTRMNGRDNGSVALUE sy-vline 
WA_IITEMDATA_STR-MAINTCALLNEXTPLNDCNTRRDNG sy-vline 
WA_IITEMDATA_STR-TECHOBJECTWITHLEADINGZEROS sy-vline      INTO ld_text SEPARATED BY SPACE.

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