ABAP Select data from SAP table RPTWTAX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPTWTAX
*  INTO TABLE @DATA(IT_RPTWTAX2).
*--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_RPTWTAX INDEX 1 INTO DATA(WA_RPTWTAX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPTWTAX>-PERNR = 1.
<RPTWTAX>-BUKRS = 1.
<RPTWTAX>-WERKS = 1.
<RPTWTAX>-PERSG = 1.
<RPTWTAX>-PERSK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPTWTAX-BTRTL, sy-vline,
  WA_RPTWTAX-ENTBD, sy-vline,
  WA_RPTWTAX-ENTID, sy-vline,
  WA_RPTWTAX-ENTAU, sy-vline,
  WA_RPTWTAX-ENTXM, sy-vline,
  WA_RPTWTAX-TFORM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPTWTAX 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_RPTWTAX 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_RPTWTAX INTO WA_RPTWTAX.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RPTWTAX_STR, 
PERNR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
BTRTL TYPE STRING,
ENTBD TYPE STRING,
ENTID TYPE STRING,
ENTAU TYPE STRING,
ENTXM TYPE STRING,
TFORM TYPE STRING,
TAXID TYPE STRING,
IDTYP TYPE STRING,
EENUM TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
ADDRESS TYPE STRING,
TXPCT TYPE STRING,
GROSS TYPE STRING,
TAX TYPE STRING,
NET TYPE STRING,
PENSION_AMOUNT TYPE STRING,
COMPANY_NAME TYPE STRING,
COMPANY_ADDRESS TYPE STRING,
TWHDR TYPE STRING,
NAME TYPE STRING,
OVCHK TYPE STRING,
BEGDA1 TYPE STRING,
ENDDA1 TYPE STRING,
ADDTY TYPE STRING,
NATIO TYPE STRING,
ICNUM TYPE STRING,
STAT2 TYPE STRING,
ORGEH TYPE STRING,
INDVD TYPE STRING,
DMSTC TYPE STRING,
REMAK TYPE STRING,
HALFY TYPE STRING,
TXAGR TYPE STRING,
PAYDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPTWTAX_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_RPTWTAX_STR-PERNR sy-vline 
WA_RPTWTAX_STR-BUKRS sy-vline 
WA_RPTWTAX_STR-WERKS sy-vline 
WA_RPTWTAX_STR-PERSG sy-vline 
WA_RPTWTAX_STR-PERSK sy-vline 
WA_RPTWTAX_STR-BTRTL sy-vline 
WA_RPTWTAX_STR-ENTBD sy-vline 
WA_RPTWTAX_STR-ENTID sy-vline 
WA_RPTWTAX_STR-ENTAU sy-vline 
WA_RPTWTAX_STR-ENTXM sy-vline 
WA_RPTWTAX_STR-TFORM sy-vline 
WA_RPTWTAX_STR-TAXID sy-vline 
WA_RPTWTAX_STR-IDTYP sy-vline 
WA_RPTWTAX_STR-EENUM sy-vline 
WA_RPTWTAX_STR-NACHN sy-vline 
WA_RPTWTAX_STR-VORNA sy-vline 
WA_RPTWTAX_STR-ADDRESS sy-vline 
WA_RPTWTAX_STR-TXPCT sy-vline 
WA_RPTWTAX_STR-GROSS sy-vline 
WA_RPTWTAX_STR-TAX sy-vline 
WA_RPTWTAX_STR-NET sy-vline 
WA_RPTWTAX_STR-PENSION_AMOUNT sy-vline 
WA_RPTWTAX_STR-COMPANY_NAME sy-vline 
WA_RPTWTAX_STR-COMPANY_ADDRESS sy-vline 
WA_RPTWTAX_STR-TWHDR sy-vline 
WA_RPTWTAX_STR-NAME sy-vline 
WA_RPTWTAX_STR-OVCHK sy-vline 
WA_RPTWTAX_STR-BEGDA1 sy-vline 
WA_RPTWTAX_STR-ENDDA1 sy-vline 
WA_RPTWTAX_STR-ADDTY sy-vline 
WA_RPTWTAX_STR-NATIO sy-vline 
WA_RPTWTAX_STR-ICNUM sy-vline 
WA_RPTWTAX_STR-STAT2 sy-vline 
WA_RPTWTAX_STR-ORGEH sy-vline 
WA_RPTWTAX_STR-INDVD sy-vline 
WA_RPTWTAX_STR-DMSTC sy-vline 
WA_RPTWTAX_STR-REMAK sy-vline 
WA_RPTWTAX_STR-HALFY sy-vline 
WA_RPTWTAX_STR-TXAGR sy-vline 
WA_RPTWTAX_STR-PAYDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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