ABAP Select data from SAP table RFSETTINGS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFSETTINGS
*  INTO TABLE @DATA(IT_RFSETTINGS2).
*--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_RFSETTINGS INDEX 1 INTO DATA(WA_RFSETTINGS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFSETTINGS>-MERKA = 1.
<RFSETTINGS>-WAERA = 1.
<RFSETTINGS>-WERTA = 1.
<RFSETTINGS>-SKALA = 1.
<RFSETTINGS>-SKALP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFSETTINGS-SKALK, sy-vline,
  WA_RFSETTINGS-OWAER, sy-vline,
  WA_RFSETTINGS-AWAER, sy-vline,
  WA_RFSETTINGS-UMRDT, sy-vline,
  WA_RFSETTINGS-KURST, sy-vline,
  WA_RFSETTINGS-OFFPO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFSETTINGS 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_RFSETTINGS 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_RFSETTINGS INTO WA_RFSETTINGS.


*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_RFSETTINGS_STR, 
MERKA TYPE STRING,
WAERA TYPE STRING,
WERTA TYPE STRING,
SKALA TYPE STRING,
SKALP TYPE STRING,
SKALK TYPE STRING,
OWAER TYPE STRING,
AWAER TYPE STRING,
UMRDT TYPE STRING,
KURST TYPE STRING,
OFFPO TYPE STRING,
AUGPO TYPE STRING,
VORPO TYPE STRING,
SONPO TYPE STRING,
LIFPO TYPE STRING,
KUNPO TYPE STRING,
VARNR TYPE STRING,
EDOWN TYPE STRING,
EDAWT TYPE STRING,
EDAWB TYPE STRING,
VARNR_ALV TYPE STRING,
WERTPRZ TYPE STRING,
MERKBEZ TYPE STRING,
MERKSCH TYPE STRING,
WAEHRORG TYPE STRING,
WAEHRANA TYPE STRING,
FRMWAE TYPE STRING,
FRMSK TYPE STRING,
VRBEZ TYPE STRING,
DECI0 TYPE STRING,
DECI1 TYPE STRING,
DECI2 TYPE STRING,
EINH0 TYPE STRING,
EINH1 TYPE STRING,
EINH2 TYPE STRING,
EINH3 TYPE STRING,
EINH4 TYPE STRING,
EINH5 TYPE STRING,
EINH6 TYPE STRING,
EINHTEXT0 TYPE STRING,
EINHTEXT1 TYPE STRING,
EINHTEXT2 TYPE STRING,
EINHTEXT3 TYPE STRING,
EINHTEXT4 TYPE STRING,
EINHTEXT5 TYPE STRING,
EINHTEXT6 TYPE STRING,
DECITEXT0 TYPE STRING,
DECITEXT1 TYPE STRING,
DECITEXT2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFSETTINGS_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_RFSETTINGS_STR-MERKA sy-vline 
WA_RFSETTINGS_STR-WAERA sy-vline 
WA_RFSETTINGS_STR-WERTA sy-vline 
WA_RFSETTINGS_STR-SKALA sy-vline 
WA_RFSETTINGS_STR-SKALP sy-vline 
WA_RFSETTINGS_STR-SKALK sy-vline 
WA_RFSETTINGS_STR-OWAER sy-vline 
WA_RFSETTINGS_STR-AWAER sy-vline 
WA_RFSETTINGS_STR-UMRDT sy-vline 
WA_RFSETTINGS_STR-KURST sy-vline 
WA_RFSETTINGS_STR-OFFPO sy-vline 
WA_RFSETTINGS_STR-AUGPO sy-vline 
WA_RFSETTINGS_STR-VORPO sy-vline 
WA_RFSETTINGS_STR-SONPO sy-vline 
WA_RFSETTINGS_STR-LIFPO sy-vline 
WA_RFSETTINGS_STR-KUNPO sy-vline 
WA_RFSETTINGS_STR-VARNR sy-vline 
WA_RFSETTINGS_STR-EDOWN sy-vline 
WA_RFSETTINGS_STR-EDAWT sy-vline 
WA_RFSETTINGS_STR-EDAWB sy-vline 
WA_RFSETTINGS_STR-VARNR_ALV sy-vline 
WA_RFSETTINGS_STR-WERTPRZ sy-vline 
WA_RFSETTINGS_STR-MERKBEZ sy-vline 
WA_RFSETTINGS_STR-MERKSCH sy-vline 
WA_RFSETTINGS_STR-WAEHRORG sy-vline 
WA_RFSETTINGS_STR-WAEHRANA sy-vline 
WA_RFSETTINGS_STR-FRMWAE sy-vline 
WA_RFSETTINGS_STR-FRMSK sy-vline 
WA_RFSETTINGS_STR-VRBEZ sy-vline 
WA_RFSETTINGS_STR-DECI0 sy-vline 
WA_RFSETTINGS_STR-DECI1 sy-vline 
WA_RFSETTINGS_STR-DECI2 sy-vline 
WA_RFSETTINGS_STR-EINH0 sy-vline 
WA_RFSETTINGS_STR-EINH1 sy-vline 
WA_RFSETTINGS_STR-EINH2 sy-vline 
WA_RFSETTINGS_STR-EINH3 sy-vline 
WA_RFSETTINGS_STR-EINH4 sy-vline 
WA_RFSETTINGS_STR-EINH5 sy-vline 
WA_RFSETTINGS_STR-EINH6 sy-vline 
WA_RFSETTINGS_STR-EINHTEXT0 sy-vline 
WA_RFSETTINGS_STR-EINHTEXT1 sy-vline 
WA_RFSETTINGS_STR-EINHTEXT2 sy-vline 
WA_RFSETTINGS_STR-EINHTEXT3 sy-vline 
WA_RFSETTINGS_STR-EINHTEXT4 sy-vline 
WA_RFSETTINGS_STR-EINHTEXT5 sy-vline 
WA_RFSETTINGS_STR-EINHTEXT6 sy-vline 
WA_RFSETTINGS_STR-DECITEXT0 sy-vline 
WA_RFSETTINGS_STR-DECITEXT1 sy-vline 
WA_RFSETTINGS_STR-DECITEXT2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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