ABAP Select data from SAP table IFIWTAXITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFIWTAXITEM
*  INTO TABLE @DATA(IT_IFIWTAXITEM2).
*--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_IFIWTAXITEM INDEX 1 INTO DATA(WA_IFIWTAXITEM2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFIWTAXITEM-WITHHOLDINGTAXTYPE, sy-vline,
  WA_IFIWTAXITEM-WITHHOLDINGTAXCODE, sy-vline,
  WA_IFIWTAXITEM-WHLDGTAXBASEAMTINCOCODECRCY, sy-vline,
  WA_IFIWTAXITEM-WHLDGTAXBASEAMTINTRANSACCRCY, sy-vline,
  WA_IFIWTAXITEM-WHLDGTAXBASEAMTINADDLCRCY2, sy-vline,
  WA_IFIWTAXITEM-WHLDGTAXBASEAMTINADDLCRCY3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFIWTAXITEM 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_IFIWTAXITEM 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_IFIWTAXITEM INTO WA_IFIWTAXITEM.


*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_IFIWTAXITEM-ACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-ACCOUNTINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit AC152, internal->external for field WHLDGTAXBASEAMTINADDLCRCY2
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IFIWTAXITEM-WHLDGTAXBASEAMTINADDLCRCY2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-WHLDGTAXBASEAMTINADDLCRCY2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WHLDGTAXBASEAMTINADDLCRCY3
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IFIWTAXITEM-WHLDGTAXBASEAMTINADDLCRCY3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-WHLDGTAXBASEAMTINADDLCRCY3.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit AC152, internal->external for field WHLDGTAXAMTINADDLCRCY2
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IFIWTAXITEM-WHLDGTAXAMTINADDLCRCY2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-WHLDGTAXAMTINADDLCRCY2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WHLDGTAXAMTINADDLCRCY3
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IFIWTAXITEM-WHLDGTAXAMTINADDLCRCY3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-WHLDGTAXAMTINADDLCRCY3.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit AC152, internal->external for field WHLDGTAXEXMPTAMTINADDLCRCY2
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IFIWTAXITEM-WHLDGTAXEXMPTAMTINADDLCRCY2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-WHLDGTAXEXMPTAMTINADDLCRCY2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WHLDGTAXEXMPTAMTINADDLCRCY3
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IFIWTAXITEM-WHLDGTAXEXMPTAMTINADDLCRCY3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-WHLDGTAXEXMPTAMTINADDLCRCY3.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field CLEARINGACCOUNTINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IFIWTAXITEM-CLEARINGACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIWTAXITEM-CLEARINGACCOUNTINGDOCUMENT.
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_IFIWTAXITEM_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
FISCALYEAR TYPE STRING,
ACCOUNTINGDOCUMENTITEM TYPE STRING,
WITHHOLDINGTAXTYPE TYPE STRING,
WITHHOLDINGTAXCODE TYPE STRING,
WHLDGTAXBASEAMTINCOCODECRCY TYPE STRING,
WHLDGTAXBASEAMTINTRANSACCRCY TYPE STRING,
WHLDGTAXBASEAMTINADDLCRCY2 TYPE STRING,
WHLDGTAXBASEAMTINADDLCRCY3 TYPE STRING,
WHLDGTAXBASEISENTEREDMANUALLY TYPE STRING,
WHLDGTAXAMTINCOCODECRCY TYPE STRING,
WHLDGTAXAMTINTRANSACCRCY TYPE STRING,
WHLDGTAXAMTINADDLCRCY2 TYPE STRING,
WHLDGTAXAMTINADDLCRCY3 TYPE STRING,
WHLDGTAXISENTEREDMANUALLY TYPE STRING,
WHLDGTAXITEMSTATUS TYPE STRING,
WHLDGTAXEXMPTAMTINCOCODECRCY TYPE STRING,
WHLDGTAXEXMPTAMTINTRANSACCRCY TYPE STRING,
WHLDGTAXEXMPTAMTINADDLCRCY2 TYPE STRING,
WHLDGTAXEXMPTAMTINADDLCRCY3 TYPE STRING,
WHLDGTAXEXMPTCERTIFICATE TYPE STRING,
FINANCIALACCOUNTTYPE TYPE STRING,
CUSTOMERSUPPLIERACCOUNT TYPE STRING,
GLACCOUNT TYPE STRING,
SUPPLIERRECIPIENTTYPE TYPE STRING,
CLEARINGACCOUNTINGDOCUMENT TYPE STRING,
CLEARINGDATE TYPE STRING,
WITHHOLDINGTAXEXMPTPERCENT TYPE STRING,
WITHHOLDINGTAXPERCENT TYPE STRING,
ISSELFWHLDGTAX TYPE STRING,
ISGROSSINGUP TYPE STRING,
WITHHOLDINGTAXCERTIFICATE TYPE STRING,
WHLDGTAXCERTDATE TYPE STRING,
COUNTRY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
ADDITIONALCURRENCY1 TYPE STRING,
ADDITIONALCURRENCY2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFIWTAXITEM_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_IFIWTAXITEM_STR-MANDT sy-vline 
WA_IFIWTAXITEM_STR-COMPANYCODE sy-vline 
WA_IFIWTAXITEM_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_IFIWTAXITEM_STR-FISCALYEAR sy-vline 
WA_IFIWTAXITEM_STR-ACCOUNTINGDOCUMENTITEM sy-vline 
WA_IFIWTAXITEM_STR-WITHHOLDINGTAXTYPE sy-vline 
WA_IFIWTAXITEM_STR-WITHHOLDINGTAXCODE sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXBASEAMTINCOCODECRCY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXBASEAMTINTRANSACCRCY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXBASEAMTINADDLCRCY2 sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXBASEAMTINADDLCRCY3 sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXBASEISENTEREDMANUALLY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXAMTINCOCODECRCY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXAMTINTRANSACCRCY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXAMTINADDLCRCY2 sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXAMTINADDLCRCY3 sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXISENTEREDMANUALLY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXITEMSTATUS sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXEXMPTAMTINCOCODECRCY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXEXMPTAMTINTRANSACCRCY sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXEXMPTAMTINADDLCRCY2 sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXEXMPTAMTINADDLCRCY3 sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXEXMPTCERTIFICATE sy-vline 
WA_IFIWTAXITEM_STR-FINANCIALACCOUNTTYPE sy-vline 
WA_IFIWTAXITEM_STR-CUSTOMERSUPPLIERACCOUNT sy-vline 
WA_IFIWTAXITEM_STR-GLACCOUNT sy-vline 
WA_IFIWTAXITEM_STR-SUPPLIERRECIPIENTTYPE sy-vline 
WA_IFIWTAXITEM_STR-CLEARINGACCOUNTINGDOCUMENT sy-vline 
WA_IFIWTAXITEM_STR-CLEARINGDATE sy-vline 
WA_IFIWTAXITEM_STR-WITHHOLDINGTAXEXMPTPERCENT sy-vline 
WA_IFIWTAXITEM_STR-WITHHOLDINGTAXPERCENT sy-vline 
WA_IFIWTAXITEM_STR-ISSELFWHLDGTAX sy-vline 
WA_IFIWTAXITEM_STR-ISGROSSINGUP sy-vline 
WA_IFIWTAXITEM_STR-WITHHOLDINGTAXCERTIFICATE sy-vline 
WA_IFIWTAXITEM_STR-WHLDGTAXCERTDATE sy-vline 
WA_IFIWTAXITEM_STR-COUNTRY sy-vline 
WA_IFIWTAXITEM_STR-COMPANYCODECURRENCY sy-vline 
WA_IFIWTAXITEM_STR-DOCUMENTCURRENCY sy-vline 
WA_IFIWTAXITEM_STR-ADDITIONALCURRENCY1 sy-vline 
WA_IFIWTAXITEM_STR-ADDITIONALCURRENCY2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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