ABAP Select data from SAP table PTW_TAX_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTW_TAX_DATA
*  INTO TABLE @DATA(IT_PTW_TAX_DATA2).
*--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_PTW_TAX_DATA INDEX 1 INTO DATA(WA_PTW_TAX_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTW_TAX_DATA>-ENTID = 1.
<PTW_TAX_DATA>-ENTAU = 1.
<PTW_TAX_DATA>-ENTXM = 1.
<PTW_TAX_DATA>-TFORM = 1.
<PTW_TAX_DATA>-FORTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTW_TAX_DATA-TAXID, sy-vline,
  WA_PTW_TAX_DATA-FIXAD, sy-vline,
  WA_PTW_TAX_DATA-PERNR, sy-vline,
  WA_PTW_TAX_DATA-NAME, sy-vline,
  WA_PTW_TAX_DATA-ADDRESS, sy-vline,
  WA_PTW_TAX_DATA-FYEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTW_TAX_DATA 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_PTW_TAX_DATA 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_PTW_TAX_DATA INTO WA_PTW_TAX_DATA.


*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_PTW_TAX_DATA_STR, 
ENTID TYPE STRING,
ENTAU TYPE STRING,
ENTXM TYPE STRING,
TFORM TYPE STRING,
FORTX TYPE STRING,
TAXID TYPE STRING,
FIXAD TYPE STRING,
PERNR TYPE STRING,
NAME TYPE STRING,
ADDRESS TYPE STRING,
FYEAR TYPE STRING,
FMONTH TYPE STRING,
TYEAR TYPE STRING,
TMONTH TYPE STRING,
RP_YEAR TYPE STRING,
PENAT TYPE STRING,
GROSS TYPE STRING,
TAX TYPE STRING,
NET TYPE STRING,
COMNM TYPE STRING,
COADR TYPE STRING,
TWHDR TYPE STRING,
HALFY TYPE STRING,
TFMNO TYPE STRING,
SUBCT TYPE STRING,
SUBCTT TYPE STRING,
ENTBD TYPE STRING,
HSTNO TYPE STRING,
NATIO TYPE STRING,
TIN TYPE STRING,
APPIX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTW_TAX_DATA_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_PTW_TAX_DATA_STR-ENTID sy-vline 
WA_PTW_TAX_DATA_STR-ENTAU sy-vline 
WA_PTW_TAX_DATA_STR-ENTXM sy-vline 
WA_PTW_TAX_DATA_STR-TFORM sy-vline 
WA_PTW_TAX_DATA_STR-FORTX sy-vline 
WA_PTW_TAX_DATA_STR-TAXID sy-vline 
WA_PTW_TAX_DATA_STR-FIXAD sy-vline 
WA_PTW_TAX_DATA_STR-PERNR sy-vline 
WA_PTW_TAX_DATA_STR-NAME sy-vline 
WA_PTW_TAX_DATA_STR-ADDRESS sy-vline 
WA_PTW_TAX_DATA_STR-FYEAR sy-vline 
WA_PTW_TAX_DATA_STR-FMONTH sy-vline 
WA_PTW_TAX_DATA_STR-TYEAR sy-vline 
WA_PTW_TAX_DATA_STR-TMONTH sy-vline 
WA_PTW_TAX_DATA_STR-RP_YEAR sy-vline 
WA_PTW_TAX_DATA_STR-PENAT sy-vline 
WA_PTW_TAX_DATA_STR-GROSS sy-vline 
WA_PTW_TAX_DATA_STR-TAX sy-vline 
WA_PTW_TAX_DATA_STR-NET sy-vline 
WA_PTW_TAX_DATA_STR-COMNM sy-vline 
WA_PTW_TAX_DATA_STR-COADR sy-vline 
WA_PTW_TAX_DATA_STR-TWHDR sy-vline 
WA_PTW_TAX_DATA_STR-HALFY sy-vline 
WA_PTW_TAX_DATA_STR-TFMNO sy-vline 
WA_PTW_TAX_DATA_STR-SUBCT sy-vline 
WA_PTW_TAX_DATA_STR-SUBCTT sy-vline 
WA_PTW_TAX_DATA_STR-ENTBD sy-vline 
WA_PTW_TAX_DATA_STR-HSTNO sy-vline 
WA_PTW_TAX_DATA_STR-NATIO sy-vline 
WA_PTW_TAX_DATA_STR-TIN sy-vline 
WA_PTW_TAX_DATA_STR-APPIX sy-vline      INTO ld_text SEPARATED BY SPACE.

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