ABAP Select data from SAP table IDUNHISTLINEITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDUNHISTLINEITEM
*  INTO TABLE @DATA(IT_IDUNHISTLINEITEM2).
*--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_IDUNHISTLINEITEM INDEX 1 INTO DATA(WA_IDUNHISTLINEITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDUNHISTLINEITEM>-MANDT = 1.
<IDUNHISTLINEITEM>-CAMASSRUNDATE = 1.
<IDUNHISTLINEITEM>-CAMASSRUNID = 1.
<IDUNHISTLINEITEM>-BUSINESSPARTNER = 1.
<IDUNHISTLINEITEM>-CONTRACTACCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDUNHISTLINEITEM-CADUNNINGCOUNTER, sy-vline,
  WA_IDUNHISTLINEITEM-CADOCUMENTNUMBER, sy-vline,
  WA_IDUNHISTLINEITEM-CAREPETITIONITEMNUMBER, sy-vline,
  WA_IDUNHISTLINEITEM-CABPITEMNUMBER, sy-vline,
  WA_IDUNHISTLINEITEM-CASUBITEMNUMBER, sy-vline,
  WA_IDUNHISTLINEITEM-CUSTOMEREVENTRECORDID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDUNHISTLINEITEM 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_IDUNHISTLINEITEM 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_IDUNHISTLINEITEM INTO WA_IDUNHISTLINEITEM.


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

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

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

*Conversion exit ALPHA, internal->external for field CACONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDUNHISTLINEITEM-CACONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDUNHISTLINEITEM-CACONTRACT.
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_IDUNHISTLINEITEM_STR, 
MANDT TYPE STRING,
CAMASSRUNDATE TYPE STRING,
CAMASSRUNID TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
CADUNNINGCOUNTER TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
CAREPETITIONITEMNUMBER TYPE STRING,
CABPITEMNUMBER TYPE STRING,
CASUBITEMNUMBER TYPE STRING,
CUSTOMEREVENTRECORDID TYPE STRING,
CAISSUEDATE TYPE STRING,
CANETDUEDATE TYPE STRING,
CACONTRACT TYPE STRING,
CADUNNINGNOTICEISREVERSED TYPE STRING,
CADUNNINGLEVEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDUNHISTLINEITEM_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_IDUNHISTLINEITEM_STR-MANDT sy-vline 
WA_IDUNHISTLINEITEM_STR-CAMASSRUNDATE sy-vline 
WA_IDUNHISTLINEITEM_STR-CAMASSRUNID sy-vline 
WA_IDUNHISTLINEITEM_STR-BUSINESSPARTNER sy-vline 
WA_IDUNHISTLINEITEM_STR-CONTRACTACCOUNT sy-vline 
WA_IDUNHISTLINEITEM_STR-CADUNNINGCOUNTER sy-vline 
WA_IDUNHISTLINEITEM_STR-CADOCUMENTNUMBER sy-vline 
WA_IDUNHISTLINEITEM_STR-CAREPETITIONITEMNUMBER sy-vline 
WA_IDUNHISTLINEITEM_STR-CABPITEMNUMBER sy-vline 
WA_IDUNHISTLINEITEM_STR-CASUBITEMNUMBER sy-vline 
WA_IDUNHISTLINEITEM_STR-CUSTOMEREVENTRECORDID sy-vline 
WA_IDUNHISTLINEITEM_STR-CAISSUEDATE sy-vline 
WA_IDUNHISTLINEITEM_STR-CANETDUEDATE sy-vline 
WA_IDUNHISTLINEITEM_STR-CACONTRACT sy-vline 
WA_IDUNHISTLINEITEM_STR-CADUNNINGNOTICEISREVERSED sy-vline 
WA_IDUNHISTLINEITEM_STR-CADUNNINGLEVEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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