ABAP Select data from SAP table RBTX_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RBTX_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 RBTX_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 RBTX_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_RBTX_DATA TYPE STANDARD TABLE OF RBTX_DATA,
      WA_RBTX_DATA TYPE RBTX_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: <RBTX_DATA> TYPE RBTX_DATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RBTX_DATA
*  INTO TABLE @DATA(IT_RBTX_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_RBTX_DATA INDEX 1 INTO DATA(WA_RBTX_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RBTX_DATA>-WMWST = 1.
<RBTX_DATA>-ARKUEN = 1.
<RBTX_DATA>-ARKUEMW = 1.
<RBTX_DATA>-FWBAS = 1.
<RBTX_DATA>-HWSTE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RBTX_DATA-HWBAS, sy-vline,
  WA_RBTX_DATA-TXMOD, sy-vline,
  WA_RBTX_DATA-TXJCD, sy-vline,
  WA_RBTX_DATA-TXJDP, sy-vline,
  WA_RBTX_DATA-KSCHL, sy-vline,
  WA_RBTX_DATA-TAXPS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RBTX_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_RBTX_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_RBTX_DATA INTO WA_RBTX_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_RBTX_DATA_STR, 
WMWST TYPE STRING,
ARKUEN TYPE STRING,
ARKUEMW TYPE STRING,
FWBAS TYPE STRING,
HWSTE TYPE STRING,
HWBAS TYPE STRING,
TXMOD TYPE STRING,
TXJCD TYPE STRING,
TXJDP TYPE STRING,
KSCHL TYPE STRING,
TAXPS TYPE STRING,
TXDAT TYPE STRING,
TXDAT_FROM TYPE STRING,
TAX_COUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RBTX_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_RBTX_DATA_STR-WMWST sy-vline 
WA_RBTX_DATA_STR-ARKUEN sy-vline 
WA_RBTX_DATA_STR-ARKUEMW sy-vline 
WA_RBTX_DATA_STR-FWBAS sy-vline 
WA_RBTX_DATA_STR-HWSTE sy-vline 
WA_RBTX_DATA_STR-HWBAS sy-vline 
WA_RBTX_DATA_STR-TXMOD sy-vline 
WA_RBTX_DATA_STR-TXJCD sy-vline 
WA_RBTX_DATA_STR-TXJDP sy-vline 
WA_RBTX_DATA_STR-KSCHL sy-vline 
WA_RBTX_DATA_STR-TAXPS sy-vline 
WA_RBTX_DATA_STR-TXDAT sy-vline 
WA_RBTX_DATA_STR-TXDAT_FROM sy-vline 
WA_RBTX_DATA_STR-TAX_COUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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