ABAP Select data from SAP table RFCU5 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFCU5 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 RFCU5. 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 RFCU5 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_RFCU5 TYPE STANDARD TABLE OF RFCU5,
      WA_RFCU5 TYPE RFCU5,
      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: <RFCU5> TYPE RFCU5.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFCU5.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFCU5
  INTO TABLE IT_RFCU5.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFCU5
*  INTO TABLE @DATA(IT_RFCU52).
*--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_RFCU5 INDEX 1 INTO DATA(WA_RFCU52).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFCU5 ASSIGNING <RFCU5>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFCU5>-DOCO1 = 1.
<RFCU5>-DOGBB = 1.
<RFCU5>-DOHRI = 1.
<RFCU5>-DOMVA = 1.
<RFCU5>-DOSGA = 1.

ENDLOOP.

LOOP AT IT_RFCU5 INTO WA_RFCU5.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFCU5-DOTAX, sy-vline,
  WA_RFCU5-DOZDI, sy-vline,
  WA_RFCU5-DORSM, sy-vline,
  WA_RFCU5-DOHRC, sy-vline,
  WA_RFCU5-DRHRC, sy-vline,
  WA_RFCU5-DAHRC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFCU5 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_RFCU5 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_RFCU5 INTO WA_RFCU5.


*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_RFCU5_STR, 
DOCO1 TYPE STRING,
DOGBB TYPE STRING,
DOHRI TYPE STRING,
DOMVA TYPE STRING,
DOSGA TYPE STRING,
DOTAX TYPE STRING,
DOZDI TYPE STRING,
DORSM TYPE STRING,
DOHRC TYPE STRING,
DRHRC TYPE STRING,
DAHRC TYPE STRING,
DGVTYP TYPE STRING,
D1ANC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFCU5_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_RFCU5_STR-DOCO1 sy-vline 
WA_RFCU5_STR-DOGBB sy-vline 
WA_RFCU5_STR-DOHRI sy-vline 
WA_RFCU5_STR-DOMVA sy-vline 
WA_RFCU5_STR-DOSGA sy-vline 
WA_RFCU5_STR-DOTAX sy-vline 
WA_RFCU5_STR-DOZDI sy-vline 
WA_RFCU5_STR-DORSM sy-vline 
WA_RFCU5_STR-DOHRC sy-vline 
WA_RFCU5_STR-DRHRC sy-vline 
WA_RFCU5_STR-DAHRC sy-vline 
WA_RFCU5_STR-DGVTYP sy-vline 
WA_RFCU5_STR-D1ANC sy-vline      INTO ld_text SEPARATED BY SPACE.

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