ABAP Select data from SAP table RFKB4UBET into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFKB4UBET 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 RFKB4UBET. 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 RFKB4UBET 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_RFKB4UBET TYPE STANDARD TABLE OF RFKB4UBET,
      WA_RFKB4UBET TYPE RFKB4UBET,
      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: <RFKB4UBET> TYPE RFKB4UBET.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFKB4UBET.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFKB4UBET
  INTO TABLE IT_RFKB4UBET.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKB4UBET
*  INTO TABLE @DATA(IT_RFKB4UBET2).
*--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_RFKB4UBET INDEX 1 INTO DATA(WA_RFKB4UBET2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFKB4UBET ASSIGNING <RFKB4UBET>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKB4UBET>-ORIWA = 1.
<RFKB4UBET>-ORIBT = 1.
<RFKB4UBET>-BETRW = 1.
<RFKB4UBET>-WAERS = 1.
<RFKB4UBET>-BETRV = 1.

ENDLOOP.

LOOP AT IT_RFKB4UBET INTO WA_RFKB4UBET.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKB4UBET-UMFAO, sy-vline,
  WA_RFKB4UBET-UMFAW, sy-vline,
  WA_RFKB4UBET-XFIXK, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RFKB4UBET 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_RFKB4UBET 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_RFKB4UBET INTO WA_RFKB4UBET.


*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_RFKB4UBET_STR, 
ORIWA TYPE STRING,
ORIBT TYPE STRING,
BETRW TYPE STRING,
WAERS TYPE STRING,
BETRV TYPE STRING,
UMFAO TYPE STRING,
UMFAW TYPE STRING,
XFIXK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKB4UBET_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_RFKB4UBET_STR-ORIWA sy-vline 
WA_RFKB4UBET_STR-ORIBT sy-vline 
WA_RFKB4UBET_STR-BETRW sy-vline 
WA_RFKB4UBET_STR-WAERS sy-vline 
WA_RFKB4UBET_STR-BETRV sy-vline 
WA_RFKB4UBET_STR-UMFAO sy-vline 
WA_RFKB4UBET_STR-UMFAW sy-vline 
WA_RFKB4UBET_STR-XFIXK sy-vline      INTO ld_text SEPARATED BY SPACE.

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