ABAP Select data from SAP table TAX_RFD_S_ITEMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TAX_RFD_S_ITEMS
*  INTO TABLE @DATA(IT_TAX_RFD_S_ITEMS2).
*--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_TAX_RFD_S_ITEMS INDEX 1 INTO DATA(WA_TAX_RFD_S_ITEMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TAX_RFD_S_ITEMS>-STATUS = 1.
<TAX_RFD_S_ITEMS>-DOC_POS = 1.
<TAX_RFD_S_ITEMS>-BUKRS = 1.
<TAX_RFD_S_ITEMS>-LSTML = 1.
<TAX_RFD_S_ITEMS>-TAX_RFD_CTRY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TAX_RFD_S_ITEMS-MWSKZ, sy-vline,
  WA_TAX_RFD_S_ITEMS-BELNR, sy-vline,
  WA_TAX_RFD_S_ITEMS-GJAHR, sy-vline,
  WA_TAX_RFD_S_ITEMS-BLART, sy-vline,
  WA_TAX_RFD_S_ITEMS-BLDAT, sy-vline,
  WA_TAX_RFD_S_ITEMS-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TAX_RFD_S_ITEMS 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_TAX_RFD_S_ITEMS 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_TAX_RFD_S_ITEMS INTO WA_TAX_RFD_S_ITEMS.


*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_TAX_RFD_S_ITEMS-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAX_RFD_S_ITEMS-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TAX_RFD_S_ITEMS-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAX_RFD_S_ITEMS-LIFNR.
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_TAX_RFD_S_ITEMS_STR, 
STATUS TYPE STRING,
DOC_POS TYPE STRING,
BUKRS TYPE STRING,
LSTML TYPE STRING,
TAX_RFD_CTRY TYPE STRING,
MWSKZ TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
XBLNR TYPE STRING,
TAX_RFD_CHAR TYPE STRING,
TAX_RFD_CHAR_T TYPE STRING,
RFD_CHAR_DESCR TYPE STRING,
FWBAS TYPE STRING,
FWSTE TYPE STRING,
WAERS TYPE STRING,
MWAERBAS TYPE STRING,
MWAUSTE TYPE STRING,
MLDWAER TYPE STRING,
LIFNR TYPE STRING,
NAME TYPE STRING,
CRED_CTRY TYPE STRING,
HOUSE_NUM TYPE STRING,
CITY TYPE STRING,
POST_CODE TYPE STRING,
STREET TYPE STRING,
STCEG TYPE STRING,
STCD1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TAX_RFD_S_ITEMS_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_TAX_RFD_S_ITEMS_STR-STATUS sy-vline 
WA_TAX_RFD_S_ITEMS_STR-DOC_POS sy-vline 
WA_TAX_RFD_S_ITEMS_STR-BUKRS sy-vline 
WA_TAX_RFD_S_ITEMS_STR-LSTML sy-vline 
WA_TAX_RFD_S_ITEMS_STR-TAX_RFD_CTRY sy-vline 
WA_TAX_RFD_S_ITEMS_STR-MWSKZ sy-vline 
WA_TAX_RFD_S_ITEMS_STR-BELNR sy-vline 
WA_TAX_RFD_S_ITEMS_STR-GJAHR sy-vline 
WA_TAX_RFD_S_ITEMS_STR-BLART sy-vline 
WA_TAX_RFD_S_ITEMS_STR-BLDAT sy-vline 
WA_TAX_RFD_S_ITEMS_STR-BUDAT sy-vline 
WA_TAX_RFD_S_ITEMS_STR-MONAT sy-vline 
WA_TAX_RFD_S_ITEMS_STR-XBLNR sy-vline 
WA_TAX_RFD_S_ITEMS_STR-TAX_RFD_CHAR sy-vline 
WA_TAX_RFD_S_ITEMS_STR-TAX_RFD_CHAR_T sy-vline 
WA_TAX_RFD_S_ITEMS_STR-RFD_CHAR_DESCR sy-vline 
WA_TAX_RFD_S_ITEMS_STR-FWBAS sy-vline 
WA_TAX_RFD_S_ITEMS_STR-FWSTE sy-vline 
WA_TAX_RFD_S_ITEMS_STR-WAERS sy-vline 
WA_TAX_RFD_S_ITEMS_STR-MWAERBAS sy-vline 
WA_TAX_RFD_S_ITEMS_STR-MWAUSTE sy-vline 
WA_TAX_RFD_S_ITEMS_STR-MLDWAER sy-vline 
WA_TAX_RFD_S_ITEMS_STR-LIFNR sy-vline 
WA_TAX_RFD_S_ITEMS_STR-NAME sy-vline 
WA_TAX_RFD_S_ITEMS_STR-CRED_CTRY sy-vline 
WA_TAX_RFD_S_ITEMS_STR-HOUSE_NUM sy-vline 
WA_TAX_RFD_S_ITEMS_STR-CITY sy-vline 
WA_TAX_RFD_S_ITEMS_STR-POST_CODE sy-vline 
WA_TAX_RFD_S_ITEMS_STR-STREET sy-vline 
WA_TAX_RFD_S_ITEMS_STR-STCEG sy-vline 
WA_TAX_RFD_S_ITEMS_STR-STCD1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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