ABAP Select data from SAP table RFRRK03 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFRRK03 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 RFRRK03. 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 RFRRK03 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_RFRRK03 TYPE STANDARD TABLE OF RFRRK03,
      WA_RFRRK03 TYPE RFRRK03,
      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: <RFRRK03> TYPE RFRRK03.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFRRK03.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFRRK03
  INTO TABLE IT_RFRRK03.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFRRK03
*  INTO TABLE @DATA(IT_RFRRK032).
*--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_RFRRK03 INDEX 1 INTO DATA(WA_RFRRK032).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFRRK03 ASSIGNING <RFRRK03>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFRRK03>-LIFNR = 1.
<RFRRK03>-TDMSH = 1.
<RFRRK03>-TWRSH = 1.
<RFRRK03>-TAKSH = 1.
<RFRRK03>-TDIFF = 1.

ENDLOOP.

LOOP AT IT_RFRRK03 INTO WA_RFRRK03.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFRRK03-SDMSH, sy-vline,
  WA_RFRRK03-SWRSH, sy-vline,
  WA_RFRRK03-SAKSH, sy-vline,
  WA_RFRRK03-SDIFF, sy-vline,
  WA_RFRRK03-WERTC, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RFRRK03 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_RFRRK03 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_RFRRK03 INTO WA_RFRRK03.


*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.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD152, internal->external for field TDMSH
CALL FUNCTION 'CONVERSION_EXIT_AD152_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-TDMSH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-TDMSH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD152, internal->external for field TWRSH
CALL FUNCTION 'CONVERSION_EXIT_AD152_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-TWRSH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-TWRSH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD152, internal->external for field TAKSH
CALL FUNCTION 'CONVERSION_EXIT_AD152_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-TAKSH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-TAKSH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD152, internal->external for field TDIFF
CALL FUNCTION 'CONVERSION_EXIT_AD152_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-TDIFF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-TDIFF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD192, internal->external for field SDMSH
CALL FUNCTION 'CONVERSION_EXIT_AD192_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-SDMSH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-SDMSH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD192, internal->external for field SWRSH
CALL FUNCTION 'CONVERSION_EXIT_AD192_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-SWRSH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-SWRSH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD192, internal->external for field SAKSH
CALL FUNCTION 'CONVERSION_EXIT_AD192_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-SAKSH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-SAKSH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AD192, internal->external for field SDIFF
CALL FUNCTION 'CONVERSION_EXIT_AD192_OUTPUT'
  EXPORTING
    input =                      WA_RFRRK03-SDIFF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRK03-SDIFF.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFRRK03_STR, 
LIFNR TYPE STRING,
TDMSH TYPE STRING,
TWRSH TYPE STRING,
TAKSH TYPE STRING,
TDIFF TYPE STRING,
SDMSH TYPE STRING,
SWRSH TYPE STRING,
SAKSH TYPE STRING,
SDIFF TYPE STRING,
WERTC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFRRK03_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_RFRRK03_STR-LIFNR sy-vline 
WA_RFRRK03_STR-TDMSH sy-vline 
WA_RFRRK03_STR-TWRSH sy-vline 
WA_RFRRK03_STR-TAKSH sy-vline 
WA_RFRRK03_STR-TDIFF sy-vline 
WA_RFRRK03_STR-SDMSH sy-vline 
WA_RFRRK03_STR-SWRSH sy-vline 
WA_RFRRK03_STR-SAKSH sy-vline 
WA_RFRRK03_STR-SDIFF sy-vline 
WA_RFRRK03_STR-WERTC sy-vline      INTO ld_text SEPARATED BY SPACE.

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