ABAP Select data from SAP table BTXCUTX_O into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BTXCUTX_O
*  INTO TABLE @DATA(IT_BTXCUTX_O2).
*--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_BTXCUTX_O INDEX 1 INTO DATA(WA_BTXCUTX_O2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BTXCUTX_O>-COUNTRY = 1.
<BTXCUTX_O>-INCOME = 1.
<BTXCUTX_O>-TAXCODE = 1.
<BTXCUTX_O>-STARTDATE = 1.
<BTXCUTX_O>-CALCMETH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BTXCUTX_O-TAXRATE, sy-vline,
  WA_BTXCUTX_O-MAXWAGE, sy-vline,
  WA_BTXCUTX_O-MINWAGE, sy-vline,
  WA_BTXCUTX_O-MAXTAX, sy-vline,
  WA_BTXCUTX_O-FLATAMT, sy-vline,
  WA_BTXCUTX_O-ROUNDING, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BTXCUTX_O 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_BTXCUTX_O 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_BTXCUTX_O INTO WA_BTXCUTX_O.


*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_BTXCUTX_O_STR, 
COUNTRY TYPE STRING,
INCOME TYPE STRING,
TAXCODE TYPE STRING,
STARTDATE TYPE STRING,
CALCMETH TYPE STRING,
TAXRATE TYPE STRING,
MAXWAGE TYPE STRING,
MINWAGE TYPE STRING,
MAXTAX TYPE STRING,
FLATAMT TYPE STRING,
ROUNDING TYPE STRING,
RESCIND TYPE STRING,
MAINTDATE TYPE STRING,
MAINTTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BTXCUTX_O_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_BTXCUTX_O_STR-COUNTRY sy-vline 
WA_BTXCUTX_O_STR-INCOME sy-vline 
WA_BTXCUTX_O_STR-TAXCODE sy-vline 
WA_BTXCUTX_O_STR-STARTDATE sy-vline 
WA_BTXCUTX_O_STR-CALCMETH sy-vline 
WA_BTXCUTX_O_STR-TAXRATE sy-vline 
WA_BTXCUTX_O_STR-MAXWAGE sy-vline 
WA_BTXCUTX_O_STR-MINWAGE sy-vline 
WA_BTXCUTX_O_STR-MAXTAX sy-vline 
WA_BTXCUTX_O_STR-FLATAMT sy-vline 
WA_BTXCUTX_O_STR-ROUNDING sy-vline 
WA_BTXCUTX_O_STR-RESCIND sy-vline 
WA_BTXCUTX_O_STR-MAINTDATE sy-vline 
WA_BTXCUTX_O_STR-MAINTTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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