ABAP Select data from SAP table RFRRX01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFRRX01 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 RFRRX01. 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 RFRRX01 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_RFRRX01 TYPE STANDARD TABLE OF RFRRX01,
      WA_RFRRX01 TYPE RFRRX01,
      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: <RFRRX01> TYPE RFRRX01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFRRX01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFRRX01
  INTO TABLE IT_RFRRX01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFRRX01
*  INTO TABLE @DATA(IT_RFRRX012).
*--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_RFRRX01 INDEX 1 INTO DATA(WA_RFRRX012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFRRX01 ASSIGNING <RFRRX01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFRRX01>-OWNER = 1.
<RFRRX01>-KOART = 1.
<RFRRX01>-AWTYP = 1.
<RFRRX01>-VERSN = 1.
<RFRRX01>-HIEBK = 1.

ENDLOOP.

LOOP AT IT_RFRRX01 INTO WA_RFRRX01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFRRX01-HIEGB, sy-vline,
  WA_RFRRX01-SPEZ1, sy-vline,
  WA_RFRRX01-SPEZ2, sy-vline,
  WA_RFRRX01-SPEZ3, sy-vline,
  WA_RFRRX01-SPEZ4, sy-vline,
  WA_RFRRX01-PERKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFRRX01 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_RFRRX01 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_RFRRX01 INTO WA_RFRRX01.


*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_RFRRX01_STR, 
OWNER TYPE STRING,
KOART TYPE STRING,
AWTYP TYPE STRING,
VERSN TYPE STRING,
HIEBK TYPE STRING,
HIEGB TYPE STRING,
SPEZ1 TYPE STRING,
SPEZ2 TYPE STRING,
SPEZ3 TYPE STRING,
SPEZ4 TYPE STRING,
PERKZ TYPE STRING,
PERID TYPE STRING,
XAUSW TYPE STRING,
SLREP TYPE STRING,
SLVAR TYPE STRING,
EXREP TYPE STRING,
EXVAR TYPE STRING,
IMREP TYPE STRING,
IMVAR TYPE STRING,
XBNKL TYPE STRING,
XSTDL TYPE STRING,
XKKDL TYPE STRING,
XMNDL TYPE STRING,
AWBEZ TYPE STRING,
ANZTX TYPE STRING,
OWNTX TYPE STRING,
AWTXT TYPE STRING,
GRUPF TYPE STRING,
GFSWS TYPE STRING,
GFSWM TYPE STRING,
GFSWL TYPE STRING,
GFTXT TYPE STRING,
NAME1 TYPE STRING,
STIDA TYPE STRING,
ERDAT TYPE STRING,
UZEIT TYPE STRING,
ERNAM TYPE STRING,
AWKEY TYPE STRING,
TOP_N TYPE STRING,
LEVLM TYPE STRING,
LEVLK TYPE STRING,
LEVLB TYPE STRING,
LEVLG TYPE STRING,
DSOCT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFRRX01_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_RFRRX01_STR-OWNER sy-vline 
WA_RFRRX01_STR-KOART sy-vline 
WA_RFRRX01_STR-AWTYP sy-vline 
WA_RFRRX01_STR-VERSN sy-vline 
WA_RFRRX01_STR-HIEBK sy-vline 
WA_RFRRX01_STR-HIEGB sy-vline 
WA_RFRRX01_STR-SPEZ1 sy-vline 
WA_RFRRX01_STR-SPEZ2 sy-vline 
WA_RFRRX01_STR-SPEZ3 sy-vline 
WA_RFRRX01_STR-SPEZ4 sy-vline 
WA_RFRRX01_STR-PERKZ sy-vline 
WA_RFRRX01_STR-PERID sy-vline 
WA_RFRRX01_STR-XAUSW sy-vline 
WA_RFRRX01_STR-SLREP sy-vline 
WA_RFRRX01_STR-SLVAR sy-vline 
WA_RFRRX01_STR-EXREP sy-vline 
WA_RFRRX01_STR-EXVAR sy-vline 
WA_RFRRX01_STR-IMREP sy-vline 
WA_RFRRX01_STR-IMVAR sy-vline 
WA_RFRRX01_STR-XBNKL sy-vline 
WA_RFRRX01_STR-XSTDL sy-vline 
WA_RFRRX01_STR-XKKDL sy-vline 
WA_RFRRX01_STR-XMNDL sy-vline 
WA_RFRRX01_STR-AWBEZ sy-vline 
WA_RFRRX01_STR-ANZTX sy-vline 
WA_RFRRX01_STR-OWNTX sy-vline 
WA_RFRRX01_STR-AWTXT sy-vline 
WA_RFRRX01_STR-GRUPF sy-vline 
WA_RFRRX01_STR-GFSWS sy-vline 
WA_RFRRX01_STR-GFSWM sy-vline 
WA_RFRRX01_STR-GFSWL sy-vline 
WA_RFRRX01_STR-GFTXT sy-vline 
WA_RFRRX01_STR-NAME1 sy-vline 
WA_RFRRX01_STR-STIDA sy-vline 
WA_RFRRX01_STR-ERDAT sy-vline 
WA_RFRRX01_STR-UZEIT sy-vline 
WA_RFRRX01_STR-ERNAM sy-vline 
WA_RFRRX01_STR-AWKEY sy-vline 
WA_RFRRX01_STR-TOP_N sy-vline 
WA_RFRRX01_STR-LEVLM sy-vline 
WA_RFRRX01_STR-LEVLK sy-vline 
WA_RFRRX01_STR-LEVLB sy-vline 
WA_RFRRX01_STR-LEVLG sy-vline 
WA_RFRRX01_STR-DSOCT sy-vline      INTO ld_text SEPARATED BY SPACE.

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