ABAP Select data from SAP table IDUETXNWTHITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDUETXNWTHITM
*  INTO TABLE @DATA(IT_IDUETXNWTHITM2).
*--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_IDUETXNWTHITM INDEX 1 INTO DATA(WA_IDUETXNWTHITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDUETXNWTHITM>-MANDT = 1.
<IDUETXNWTHITM>-COMPANYCODE = 1.
<IDUETXNWTHITM>-ACCOUNTINGDOCUMENT = 1.
<IDUETXNWTHITM>-FISCALYEAR = 1.
<IDUETXNWTHITM>-TAXCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDUETXNWTHITM-TAXITEM, sy-vline,
  WA_IDUETXNWTHITM-TAXBOX, sy-vline,
  WA_IDUETXNWTHITM-TAXDECLNAMOUNTTYPE, sy-vline,
  WA_IDUETXNWTHITM-TAXITEMGROUPINGVERSION, sy-vline,
  WA_IDUETXNWTHITM-WITHHOLDINGTAXTYPE, sy-vline,
  WA_IDUETXNWTHITM-ACCOUNTINGDOCUMENTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDUETXNWTHITM 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_IDUETXNWTHITM 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_IDUETXNWTHITM INTO WA_IDUETXNWTHITM.


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

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

*Conversion exit AC152, internal->external for field TAXBASEAMOUNTINCOCODECRCY
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDUETXNWTHITM-TAXBASEAMOUNTINCOCODECRCY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDUETXNWTHITM-TAXBASEAMOUNTINCOCODECRCY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field TAXAMOUNTINCOCODECRCY
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_IDUETXNWTHITM-TAXAMOUNTINCOCODECRCY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDUETXNWTHITM-TAXAMOUNTINCOCODECRCY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WHLDGTAXAMTINCOCODECRCY
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IDUETXNWTHITM-WHLDGTAXAMTINCOCODECRCY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDUETXNWTHITM-WHLDGTAXAMTINCOCODECRCY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field TAXBASEAMOUNTINRPTGCRCY
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_IDUETXNWTHITM-TAXBASEAMOUNTINRPTGCRCY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDUETXNWTHITM-TAXBASEAMOUNTINRPTGCRCY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field TAXAMOUNTINRPTGCRCY
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_IDUETXNWTHITM-TAXAMOUNTINRPTGCRCY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDUETXNWTHITM-TAXAMOUNTINRPTGCRCY.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field CREDITOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDUETXNWTHITM-CREDITOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDUETXNWTHITM-CREDITOR.
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_IDUETXNWTHITM_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
FISCALYEAR TYPE STRING,
TAXCODE TYPE STRING,
TAXITEM TYPE STRING,
TAXBOX TYPE STRING,
TAXDECLNAMOUNTTYPE TYPE STRING,
TAXITEMGROUPINGVERSION TYPE STRING,
WITHHOLDINGTAXTYPE TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
DOCUMENTDATE TYPE STRING,
POSTINGDATE TYPE STRING,
REPORTINGDATE TYPE STRING,
DOCUMENTREFERENCEID TYPE STRING,
TAXRATE TYPE STRING,
TAXBASEAMOUNTINCOCODECRCY TYPE STRING,
TAXAMOUNTINCOCODECRCY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
OFFICIALWHLDGTAXCODE TYPE STRING,
WHLDGTAXAMTINCOCODECRCY TYPE STRING,
REPORTINGCURRENCY TYPE STRING,
TAXBASEAMOUNTINRPTGCRCY TYPE STRING,
TAXAMOUNTINRPTGCRCY TYPE STRING,
WHLDGTAXBASEAMTINREPORTINGCRCY TYPE STRING,
WHLDGTAXAMTINREPORTINGCRCY TYPE STRING,
GLACCOUNT TYPE STRING,
TAXINVOICENUMBER TYPE STRING,
COUNTRY TYPE STRING,
SUPPLIERRECIPIENTTYPE TYPE STRING,
SUPPLIERITEMTAXAMOUNT TYPE STRING,
BUSINESSPARTNERCOUNTRY TYPE STRING,
FOLLOWONDOCUMENTTYPE TYPE STRING,
CREDITOR TYPE STRING,
BUSINESSTYPE TYPE STRING,
BUSINESSPARTNERNAME TYPE STRING,
TAXNUMBER1 TYPE STRING,
TAXNUMBERRESPONSIBLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDUETXNWTHITM_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_IDUETXNWTHITM_STR-MANDT sy-vline 
WA_IDUETXNWTHITM_STR-COMPANYCODE sy-vline 
WA_IDUETXNWTHITM_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_IDUETXNWTHITM_STR-FISCALYEAR sy-vline 
WA_IDUETXNWTHITM_STR-TAXCODE sy-vline 
WA_IDUETXNWTHITM_STR-TAXITEM sy-vline 
WA_IDUETXNWTHITM_STR-TAXBOX sy-vline 
WA_IDUETXNWTHITM_STR-TAXDECLNAMOUNTTYPE sy-vline 
WA_IDUETXNWTHITM_STR-TAXITEMGROUPINGVERSION sy-vline 
WA_IDUETXNWTHITM_STR-WITHHOLDINGTAXTYPE sy-vline 
WA_IDUETXNWTHITM_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_IDUETXNWTHITM_STR-DOCUMENTDATE sy-vline 
WA_IDUETXNWTHITM_STR-POSTINGDATE sy-vline 
WA_IDUETXNWTHITM_STR-REPORTINGDATE sy-vline 
WA_IDUETXNWTHITM_STR-DOCUMENTREFERENCEID sy-vline 
WA_IDUETXNWTHITM_STR-TAXRATE sy-vline 
WA_IDUETXNWTHITM_STR-TAXBASEAMOUNTINCOCODECRCY sy-vline 
WA_IDUETXNWTHITM_STR-TAXAMOUNTINCOCODECRCY sy-vline 
WA_IDUETXNWTHITM_STR-COMPANYCODECURRENCY sy-vline 
WA_IDUETXNWTHITM_STR-DOCUMENTCURRENCY sy-vline 
WA_IDUETXNWTHITM_STR-OFFICIALWHLDGTAXCODE sy-vline 
WA_IDUETXNWTHITM_STR-WHLDGTAXAMTINCOCODECRCY sy-vline 
WA_IDUETXNWTHITM_STR-REPORTINGCURRENCY sy-vline 
WA_IDUETXNWTHITM_STR-TAXBASEAMOUNTINRPTGCRCY sy-vline 
WA_IDUETXNWTHITM_STR-TAXAMOUNTINRPTGCRCY sy-vline 
WA_IDUETXNWTHITM_STR-WHLDGTAXBASEAMTINREPORTINGCRCY sy-vline 
WA_IDUETXNWTHITM_STR-WHLDGTAXAMTINREPORTINGCRCY sy-vline 
WA_IDUETXNWTHITM_STR-GLACCOUNT sy-vline 
WA_IDUETXNWTHITM_STR-TAXINVOICENUMBER sy-vline 
WA_IDUETXNWTHITM_STR-COUNTRY sy-vline 
WA_IDUETXNWTHITM_STR-SUPPLIERRECIPIENTTYPE sy-vline 
WA_IDUETXNWTHITM_STR-SUPPLIERITEMTAXAMOUNT sy-vline 
WA_IDUETXNWTHITM_STR-BUSINESSPARTNERCOUNTRY sy-vline 
WA_IDUETXNWTHITM_STR-FOLLOWONDOCUMENTTYPE sy-vline 
WA_IDUETXNWTHITM_STR-CREDITOR sy-vline 
WA_IDUETXNWTHITM_STR-BUSINESSTYPE sy-vline 
WA_IDUETXNWTHITM_STR-BUSINESSPARTNERNAME sy-vline 
WA_IDUETXNWTHITM_STR-TAXNUMBER1 sy-vline 
WA_IDUETXNWTHITM_STR-TAXNUMBERRESPONSIBLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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