ABAP Select data from SAP table IDHU_DSP_ITEM_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDHU_DSP_ITEM_S
*  INTO TABLE @DATA(IT_IDHU_DSP_ITEM_S2).
*--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_IDHU_DSP_ITEM_S INDEX 1 INTO DATA(WA_IDHU_DSP_ITEM_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDHU_DSP_ITEM_S>-IDHU_DSP_ITEM = 1.
<IDHU_DSP_ITEM_S>-BUKRS = 1.
<IDHU_DSP_ITEM_S>-STCEG_BUKRS = 1.
<IDHU_DSP_ITEM_S>-VATID_DECL = 1.
<IDHU_DSP_ITEM_S>-VATID_GRP_DECL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDHU_DSP_ITEM_S-VATID_GRP_TYPE, sy-vline,
  WA_IDHU_DSP_ITEM_S-VATID_TYPE, sy-vline,
  WA_IDHU_DSP_ITEM_S-FORM_KEY, sy-vline,
  WA_IDHU_DSP_ITEM_S-ISSUED_INVOICE_ID, sy-vline,
  WA_IDHU_DSP_ITEM_S-ISSUED_INVOICE_DATE, sy-vline,
  WA_IDHU_DSP_ITEM_S-INVOICE_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDHU_DSP_ITEM_S 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_IDHU_DSP_ITEM_S 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_IDHU_DSP_ITEM_S INTO WA_IDHU_DSP_ITEM_S.


*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 AU132, internal->external for field DECBAS
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDHU_DSP_ITEM_S-DECBAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDHU_DSP_ITEM_S-DECBAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DECSTE
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDHU_DSP_ITEM_S-DECSTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDHU_DSP_ITEM_S-DECSTE.
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_IDHU_DSP_ITEM_S_STR, 
IDHU_DSP_ITEM TYPE STRING,
BUKRS TYPE STRING,
STCEG_BUKRS TYPE STRING,
VATID_DECL TYPE STRING,
VATID_GRP_DECL TYPE STRING,
VATID_GRP_TYPE TYPE STRING,
VATID_TYPE TYPE STRING,
FORM_KEY TYPE STRING,
ISSUED_INVOICE_ID TYPE STRING,
ISSUED_INVOICE_DATE TYPE STRING,
INVOICE_TYPE TYPE STRING,
PREV_INVOICE_ID TYPE STRING,
DECVATPERFDATE TYPE STRING,
DECBAS TYPE STRING,
DECSTE TYPE STRING,
WAERS TYPE STRING,
BUTXT TYPE STRING,
BU_NAME TYPE STRING,
INV_CHAIN_ID TYPE STRING,
INV_CHAIN_POS TYPE STRING,
BLDAT TYPE STRING,
INVOICE_DPT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDHU_DSP_ITEM_S_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_IDHU_DSP_ITEM_S_STR-IDHU_DSP_ITEM sy-vline 
WA_IDHU_DSP_ITEM_S_STR-BUKRS sy-vline 
WA_IDHU_DSP_ITEM_S_STR-STCEG_BUKRS sy-vline 
WA_IDHU_DSP_ITEM_S_STR-VATID_DECL sy-vline 
WA_IDHU_DSP_ITEM_S_STR-VATID_GRP_DECL sy-vline 
WA_IDHU_DSP_ITEM_S_STR-VATID_GRP_TYPE sy-vline 
WA_IDHU_DSP_ITEM_S_STR-VATID_TYPE sy-vline 
WA_IDHU_DSP_ITEM_S_STR-FORM_KEY sy-vline 
WA_IDHU_DSP_ITEM_S_STR-ISSUED_INVOICE_ID sy-vline 
WA_IDHU_DSP_ITEM_S_STR-ISSUED_INVOICE_DATE sy-vline 
WA_IDHU_DSP_ITEM_S_STR-INVOICE_TYPE sy-vline 
WA_IDHU_DSP_ITEM_S_STR-PREV_INVOICE_ID sy-vline 
WA_IDHU_DSP_ITEM_S_STR-DECVATPERFDATE sy-vline 
WA_IDHU_DSP_ITEM_S_STR-DECBAS sy-vline 
WA_IDHU_DSP_ITEM_S_STR-DECSTE sy-vline 
WA_IDHU_DSP_ITEM_S_STR-WAERS sy-vline 
WA_IDHU_DSP_ITEM_S_STR-BUTXT sy-vline 
WA_IDHU_DSP_ITEM_S_STR-BU_NAME sy-vline 
WA_IDHU_DSP_ITEM_S_STR-INV_CHAIN_ID sy-vline 
WA_IDHU_DSP_ITEM_S_STR-INV_CHAIN_POS sy-vline 
WA_IDHU_DSP_ITEM_S_STR-BLDAT sy-vline 
WA_IDHU_DSP_ITEM_S_STR-INVOICE_DPT sy-vline      INTO ld_text SEPARATED BY SPACE.

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