ABAP Select data from SAP table IDHU_DSP_INVDET_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_INVDET_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_INVDET_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_INVDET_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_INVDET_S TYPE STANDARD TABLE OF IDHU_DSP_INVDET_S,
      WA_IDHU_DSP_INVDET_S TYPE IDHU_DSP_INVDET_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_INVDET_S> TYPE IDHU_DSP_INVDET_S.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDHU_DSP_INVDET_S
*  INTO TABLE @DATA(IT_IDHU_DSP_INVDET_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_INVDET_S INDEX 1 INTO DATA(WA_IDHU_DSP_INVDET_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDHU_DSP_INVDET_S>-BUKRS = 1.
<IDHU_DSP_INVDET_S>-BELNR = 1.
<IDHU_DSP_INVDET_S>-GJAHR = 1.
<IDHU_DSP_INVDET_S>-AWKEY = 1.
<IDHU_DSP_INVDET_S>-AWTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDHU_DSP_INVDET_S-AWSYS, sy-vline,
  WA_IDHU_DSP_INVDET_S-XBLNR, sy-vline,
  WA_IDHU_DSP_INVDET_S-TBTKZ, sy-vline,
  WA_IDHU_DSP_INVDET_S-DEFERRED_TAX, sy-vline,
  WA_IDHU_DSP_INVDET_S-ISSUED_INVOICE_ID, sy-vline,
  WA_IDHU_DSP_INVDET_S-ISSUED_INVOICE_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDHU_DSP_INVDET_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_INVDET_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_INVDET_S INTO WA_IDHU_DSP_INVDET_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 ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDHU_DSP_INVDET_S-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDHU_DSP_INVDET_S-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IDHU_DSP_INVDET_S-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDHU_DSP_INVDET_S-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PREVIOUS_AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDHU_DSP_INVDET_S-PREVIOUS_AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDHU_DSP_INVDET_S-PREVIOUS_AWSYS.
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_INVDET_S_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
AWKEY TYPE STRING,
AWTYP TYPE STRING,
AWSYS TYPE STRING,
XBLNR TYPE STRING,
TBTKZ TYPE STRING,
DEFERRED_TAX TYPE STRING,
ISSUED_INVOICE_ID TYPE STRING,
ISSUED_INVOICE_DATE TYPE STRING,
PREVIOUS_AWKEY TYPE STRING,
PREVIOUS_AWTYP TYPE STRING,
PREVIOUS_AWSYS TYPE STRING,
ERROR TYPE STRING,
ISSUED_INVOICE_TYPE TYPE STRING,
FULFILLMENT_DATE TYPE STRING,
INVOICE_RECEIPT_DATE TYPE STRING,
VATDATE TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
PYMNT_DUE_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDHU_DSP_INVDET_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_INVDET_S_STR-BUKRS sy-vline 
WA_IDHU_DSP_INVDET_S_STR-BELNR sy-vline 
WA_IDHU_DSP_INVDET_S_STR-GJAHR sy-vline 
WA_IDHU_DSP_INVDET_S_STR-AWKEY sy-vline 
WA_IDHU_DSP_INVDET_S_STR-AWTYP sy-vline 
WA_IDHU_DSP_INVDET_S_STR-AWSYS sy-vline 
WA_IDHU_DSP_INVDET_S_STR-XBLNR sy-vline 
WA_IDHU_DSP_INVDET_S_STR-TBTKZ sy-vline 
WA_IDHU_DSP_INVDET_S_STR-DEFERRED_TAX sy-vline 
WA_IDHU_DSP_INVDET_S_STR-ISSUED_INVOICE_ID sy-vline 
WA_IDHU_DSP_INVDET_S_STR-ISSUED_INVOICE_DATE sy-vline 
WA_IDHU_DSP_INVDET_S_STR-PREVIOUS_AWKEY sy-vline 
WA_IDHU_DSP_INVDET_S_STR-PREVIOUS_AWTYP sy-vline 
WA_IDHU_DSP_INVDET_S_STR-PREVIOUS_AWSYS sy-vline 
WA_IDHU_DSP_INVDET_S_STR-ERROR sy-vline 
WA_IDHU_DSP_INVDET_S_STR-ISSUED_INVOICE_TYPE sy-vline 
WA_IDHU_DSP_INVDET_S_STR-FULFILLMENT_DATE sy-vline 
WA_IDHU_DSP_INVDET_S_STR-INVOICE_RECEIPT_DATE sy-vline 
WA_IDHU_DSP_INVDET_S_STR-VATDATE sy-vline 
WA_IDHU_DSP_INVDET_S_STR-BUDAT sy-vline 
WA_IDHU_DSP_INVDET_S_STR-BLDAT sy-vline 
WA_IDHU_DSP_INVDET_S_STR-PYMNT_DUE_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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