ABAP Select data from SAP table BTXOVFR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BTXOVFR
*  INTO TABLE @DATA(IT_BTXOVFR2).
*--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_BTXOVFR INDEX 1 INTO DATA(WA_BTXOVFR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BTXOVFR>-MANDT = 1.
<BTXOVFR>-EMPGROUP = 1.
<BTXOVFR>-COUNTRY = 1.
<BTXOVFR>-INCOME = 1.
<BTXOVFR>-TAXCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BTXOVFR-TAXTYPE, sy-vline,
  WA_BTXOVFR-FORMULA, sy-vline,
  WA_BTXOVFR-STARTDATE, sy-vline,
  WA_BTXOVFR-RESIDENT, sy-vline,
  WA_BTXOVFR-PAYTYPE, sy-vline,
  WA_BTXOVFR-CALCMETH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BTXOVFR 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_BTXOVFR 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_BTXOVFR INTO WA_BTXOVFR.


*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 TXTYP, internal->external for field TAXTYPE
CALL FUNCTION 'CONVERSION_EXIT_TXTYP_OUTPUT'
  EXPORTING
    input =                      WA_BTXOVFR-TAXTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BTXOVFR-TAXTYPE.
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_BTXOVFR_STR, 
MANDT TYPE STRING,
EMPGROUP TYPE STRING,
COUNTRY TYPE STRING,
INCOME TYPE STRING,
TAXCODE TYPE STRING,
TAXTYPE TYPE STRING,
FORMULA TYPE STRING,
STARTDATE TYPE STRING,
RESIDENT TYPE STRING,
PAYTYPE TYPE STRING,
CALCMETH TYPE STRING,
OVFRTAX TYPE STRING,
OVFRMAXW TYPE STRING,
OVFRMINW TYPE STRING,
OVFRMAXT TYPE STRING,
OVFRFLAT TYPE STRING,
OVFRROUND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BTXOVFR_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_BTXOVFR_STR-MANDT sy-vline 
WA_BTXOVFR_STR-EMPGROUP sy-vline 
WA_BTXOVFR_STR-COUNTRY sy-vline 
WA_BTXOVFR_STR-INCOME sy-vline 
WA_BTXOVFR_STR-TAXCODE sy-vline 
WA_BTXOVFR_STR-TAXTYPE sy-vline 
WA_BTXOVFR_STR-FORMULA sy-vline 
WA_BTXOVFR_STR-STARTDATE sy-vline 
WA_BTXOVFR_STR-RESIDENT sy-vline 
WA_BTXOVFR_STR-PAYTYPE sy-vline 
WA_BTXOVFR_STR-CALCMETH sy-vline 
WA_BTXOVFR_STR-OVFRTAX sy-vline 
WA_BTXOVFR_STR-OVFRMAXW sy-vline 
WA_BTXOVFR_STR-OVFRMINW sy-vline 
WA_BTXOVFR_STR-OVFRMAXT sy-vline 
WA_BTXOVFR_STR-OVFRFLAT sy-vline 
WA_BTXOVFR_STR-OVFRROUND sy-vline      INTO ld_text SEPARATED BY SPACE.

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