ABAP Select data from SAP table IALLOCTBLITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IALLOCTBLITEM
*  INTO TABLE @DATA(IT_IALLOCTBLITEM2).
*--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_IALLOCTBLITEM INDEX 1 INTO DATA(WA_IALLOCTBLITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IALLOCTBLITEM>-MANDT = 1.
<IALLOCTBLITEM>-ALLOCATIONTABLE = 1.
<IALLOCTBLITEM>-ALLOCATIONTABLEITEM = 1.
<IALLOCTBLITEM>-PURCHASECONTRACT = 1.
<IALLOCTBLITEM>-PURCHASECONTRACTITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IALLOCTBLITEM-PURCHASEORDER, sy-vline,
  WA_IALLOCTBLITEM-PURCHASEORDERITEM, sy-vline,
  WA_IALLOCTBLITEM-RETAILPROMOTION, sy-vline,
  WA_IALLOCTBLITEM-PRODUCT, sy-vline,
  WA_IALLOCTBLITEM-DISTRIBUTIONCENTER, sy-vline,
  WA_IALLOCTBLITEM-SUPPLIER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IALLOCTBLITEM 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_IALLOCTBLITEM 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_IALLOCTBLITEM INTO WA_IALLOCTBLITEM.


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

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

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

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

*Conversion exit MATN1, internal->external for field PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IALLOCTBLITEM-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IALLOCTBLITEM-PRODUCT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field QUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IALLOCTBLITEM-QUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IALLOCTBLITEM-QUANTITYUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INBOUNDDELIVERY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IALLOCTBLITEM-INBOUNDDELIVERY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IALLOCTBLITEM-INBOUNDDELIVERY.
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_IALLOCTBLITEM_STR, 
MANDT TYPE STRING,
ALLOCATIONTABLE TYPE STRING,
ALLOCATIONTABLEITEM TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
RETAILPROMOTION TYPE STRING,
PRODUCT TYPE STRING,
DISTRIBUTIONCENTER TYPE STRING,
SUPPLIER TYPE STRING,
PLANNEDQUANTITY TYPE STRING,
CONFIRMEDQUANTITY TYPE STRING,
QUANTITYUNIT TYPE STRING,
ALLOCATIONSTRATEGY TYPE STRING,
MATERIALGROUP TYPE STRING,
INBOUNDDELIVERY TYPE STRING,
INBOUNDDELIVERYITEM TYPE STRING,
ALLOCTABLECREATINGAPPLICATION TYPE STRING,
ALLOCTBLITEMOFCONFIGBLPRODUCT TYPE STRING,
ARTICLECATEGORY TYPE STRING,
ALLOCTBLITMBLOCKREASON TYPE STRING,
CREATIONDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IALLOCTBLITEM_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_IALLOCTBLITEM_STR-MANDT sy-vline 
WA_IALLOCTBLITEM_STR-ALLOCATIONTABLE sy-vline 
WA_IALLOCTBLITEM_STR-ALLOCATIONTABLEITEM sy-vline 
WA_IALLOCTBLITEM_STR-PURCHASECONTRACT sy-vline 
WA_IALLOCTBLITEM_STR-PURCHASECONTRACTITEM sy-vline 
WA_IALLOCTBLITEM_STR-PURCHASEORDER sy-vline 
WA_IALLOCTBLITEM_STR-PURCHASEORDERITEM sy-vline 
WA_IALLOCTBLITEM_STR-RETAILPROMOTION sy-vline 
WA_IALLOCTBLITEM_STR-PRODUCT sy-vline 
WA_IALLOCTBLITEM_STR-DISTRIBUTIONCENTER sy-vline 
WA_IALLOCTBLITEM_STR-SUPPLIER sy-vline 
WA_IALLOCTBLITEM_STR-PLANNEDQUANTITY sy-vline 
WA_IALLOCTBLITEM_STR-CONFIRMEDQUANTITY sy-vline 
WA_IALLOCTBLITEM_STR-QUANTITYUNIT sy-vline 
WA_IALLOCTBLITEM_STR-ALLOCATIONSTRATEGY sy-vline 
WA_IALLOCTBLITEM_STR-MATERIALGROUP sy-vline 
WA_IALLOCTBLITEM_STR-INBOUNDDELIVERY sy-vline 
WA_IALLOCTBLITEM_STR-INBOUNDDELIVERYITEM sy-vline 
WA_IALLOCTBLITEM_STR-ALLOCTABLECREATINGAPPLICATION sy-vline 
WA_IALLOCTBLITEM_STR-ALLOCTBLITEMOFCONFIGBLPRODUCT sy-vline 
WA_IALLOCTBLITEM_STR-ARTICLECATEGORY sy-vline 
WA_IALLOCTBLITEM_STR-ALLOCTBLITMBLOCKREASON sy-vline 
WA_IALLOCTBLITEM_STR-CREATIONDATE sy-vline 
WA_IALLOCTBLITEM_STR-CREATEDBYUSER sy-vline 
WA_IALLOCTBLITEM_STR-LASTCHANGEDATE sy-vline 
WA_IALLOCTBLITEM_STR-LASTCHANGEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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