ABAP Select data from SAP table RFFK3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFFK3 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 RFFK3. 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 RFFK3 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_RFFK3 TYPE STANDARD TABLE OF RFFK3,
      WA_RFFK3 TYPE RFFK3,
      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: <RFFK3> TYPE RFFK3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFFK3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFFK3
  INTO TABLE IT_RFFK3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFFK3
*  INTO TABLE @DATA(IT_RFFK32).
*--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_RFFK3 INDEX 1 INTO DATA(WA_RFFK32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFFK3 ASSIGNING <RFFK3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFFK3>-NAME1 = 1.
<RFFK3>-NAME2 = 1.
<RFFK3>-NAME3 = 1.
<RFFK3>-NAME4 = 1.
<RFFK3>-ANSCHRIFT = 1.

ENDLOOP.

LOOP AT IT_RFFK3 INTO WA_RFFK3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFFK3-COUNT1, sy-vline,
  WA_RFFK3-COUNT2, sy-vline,
  WA_RFFK3-FIRMA, sy-vline,
  WA_RFFK3-BTAG, sy-vline,
  WA_RFFK3-CITY1, sy-vline,
  WA_RFFK3-CITY2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFFK3 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_RFFK3 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_RFFK3 INTO WA_RFFK3.


*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_RFFK3_STR, 
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
ANSCHRIFT TYPE STRING,
COUNT1 TYPE STRING,
COUNT2 TYPE STRING,
FIRMA TYPE STRING,
BTAG TYPE STRING,
CITY1 TYPE STRING,
CITY2 TYPE STRING,
ZWEIG1 TYPE STRING,
ZWEIG2 TYPE STRING,
RFORM TYPE STRING,
LAND1 TYPE STRING,
LAND2 TYPE STRING,
JAHRESUM TYPE STRING,
MITARB TYPE STRING,
DATUM1 TYPE STRING,
DATUM2 TYPE STRING,
DATUM3 TYPE STRING,
DATUM4 TYPE STRING,
DATUM5 TYPE STRING,
DATUM6 TYPE STRING,
HSUMFELD TYPE STRING,
HSUMFELD08 TYPE STRING,
HSUMFELD09 TYPE STRING,
HSUMFELD10 TYPE STRING,
HSUMFELD11 TYPE STRING,
HSUMFELD12 TYPE STRING,
HSUMFELD13 TYPE STRING,
HSUMFELD14 TYPE STRING,
HSUMFELD16 TYPE STRING,
HSUMFELD17 TYPE STRING,
HSUMFELD18 TYPE STRING,
HSUMFELD19 TYPE STRING,
HSUMFELD20 TYPE STRING,
HSUMFELD21 TYPE STRING,
HSUMFELD22 TYPE STRING,
HSUMFELD23 TYPE STRING,
HSUMFELD24 TYPE STRING,
HSUMFELD25 TYPE STRING,
HSUMFELDD TYPE STRING,
HSUMFELDC TYPE STRING,
HSUMFELDE TYPE STRING,
HSUMFELDA1 TYPE STRING,
HSUMFELDA2 TYPE STRING,
HSUMFELDA3 TYPE STRING,
HSUMFELDA4 TYPE STRING,
HSUMFELDA5 TYPE STRING,
HSUMFELDB1 TYPE STRING,
HSUMFELDB3 TYPE STRING,
HSUMFELDB2 TYPE STRING,
HSUMFELDB4 TYPE STRING,
HSUMFELD15 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFFK3_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_RFFK3_STR-NAME1 sy-vline 
WA_RFFK3_STR-NAME2 sy-vline 
WA_RFFK3_STR-NAME3 sy-vline 
WA_RFFK3_STR-NAME4 sy-vline 
WA_RFFK3_STR-ANSCHRIFT sy-vline 
WA_RFFK3_STR-COUNT1 sy-vline 
WA_RFFK3_STR-COUNT2 sy-vline 
WA_RFFK3_STR-FIRMA sy-vline 
WA_RFFK3_STR-BTAG sy-vline 
WA_RFFK3_STR-CITY1 sy-vline 
WA_RFFK3_STR-CITY2 sy-vline 
WA_RFFK3_STR-ZWEIG1 sy-vline 
WA_RFFK3_STR-ZWEIG2 sy-vline 
WA_RFFK3_STR-RFORM sy-vline 
WA_RFFK3_STR-LAND1 sy-vline 
WA_RFFK3_STR-LAND2 sy-vline 
WA_RFFK3_STR-JAHRESUM sy-vline 
WA_RFFK3_STR-MITARB sy-vline 
WA_RFFK3_STR-DATUM1 sy-vline 
WA_RFFK3_STR-DATUM2 sy-vline 
WA_RFFK3_STR-DATUM3 sy-vline 
WA_RFFK3_STR-DATUM4 sy-vline 
WA_RFFK3_STR-DATUM5 sy-vline 
WA_RFFK3_STR-DATUM6 sy-vline 
WA_RFFK3_STR-HSUMFELD sy-vline 
WA_RFFK3_STR-HSUMFELD08 sy-vline 
WA_RFFK3_STR-HSUMFELD09 sy-vline 
WA_RFFK3_STR-HSUMFELD10 sy-vline 
WA_RFFK3_STR-HSUMFELD11 sy-vline 
WA_RFFK3_STR-HSUMFELD12 sy-vline 
WA_RFFK3_STR-HSUMFELD13 sy-vline 
WA_RFFK3_STR-HSUMFELD14 sy-vline 
WA_RFFK3_STR-HSUMFELD16 sy-vline 
WA_RFFK3_STR-HSUMFELD17 sy-vline 
WA_RFFK3_STR-HSUMFELD18 sy-vline 
WA_RFFK3_STR-HSUMFELD19 sy-vline 
WA_RFFK3_STR-HSUMFELD20 sy-vline 
WA_RFFK3_STR-HSUMFELD21 sy-vline 
WA_RFFK3_STR-HSUMFELD22 sy-vline 
WA_RFFK3_STR-HSUMFELD23 sy-vline 
WA_RFFK3_STR-HSUMFELD24 sy-vline 
WA_RFFK3_STR-HSUMFELD25 sy-vline 
WA_RFFK3_STR-HSUMFELDD sy-vline 
WA_RFFK3_STR-HSUMFELDC sy-vline 
WA_RFFK3_STR-HSUMFELDE sy-vline 
WA_RFFK3_STR-HSUMFELDA1 sy-vline 
WA_RFFK3_STR-HSUMFELDA2 sy-vline 
WA_RFFK3_STR-HSUMFELDA3 sy-vline 
WA_RFFK3_STR-HSUMFELDA4 sy-vline 
WA_RFFK3_STR-HSUMFELDA5 sy-vline 
WA_RFFK3_STR-HSUMFELDB1 sy-vline 
WA_RFFK3_STR-HSUMFELDB3 sy-vline 
WA_RFFK3_STR-HSUMFELDB2 sy-vline 
WA_RFFK3_STR-HSUMFELDB4 sy-vline 
WA_RFFK3_STR-HSUMFELD15 sy-vline      INTO ld_text SEPARATED BY SPACE.

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