ABAP Select data from SAP table RNFN111 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNFN111 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 RNFN111. 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 RNFN111 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_RNFN111 TYPE STANDARD TABLE OF RNFN111,
      WA_RNFN111 TYPE RNFN111,
      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: <RNFN111> TYPE RNFN111.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNFN111.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNFN111
  INTO TABLE IT_RNFN111.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNFN111
*  INTO TABLE @DATA(IT_RNFN1112).
*--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_RNFN111 INDEX 1 INTO DATA(WA_RNFN1112).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNFN111 ASSIGNING <RNFN111>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNFN111>-MANDT = 1.
<RNFN111>-EINRI = 1.
<RNFN111>-FALNR = 1.
<RNFN111>-ORGID = 1.
<RNFN111>-LEIST = 1.

ENDLOOP.

LOOP AT IT_RNFN111 INTO WA_RNFN111.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNFN111-LNRLS, sy-vline,
  WA_RNFN111-N1LFNR, sy-vline,
  WA_RNFN111-N1BEGDT, sy-vline,
  WA_RNFN111-N1ENDDT, sy-vline,
  WA_RNFN111-N1INTER_T, sy-vline,
  WA_RNFN111-N1BEGZT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNFN111 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_RNFN111 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_RNFN111 INTO WA_RNFN111.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFN111-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFN111-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFN111-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFN111-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFN111-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFN111-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEIST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFN111-LEIST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFN111-LEIST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFN111-LNRLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFN111-LNRLS.
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_RNFN111_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
FALNR TYPE STRING,
ORGID TYPE STRING,
LEIST TYPE STRING,
LNRLS TYPE STRING,
N1LFNR TYPE STRING,
N1BEGDT TYPE STRING,
N1ENDDT TYPE STRING,
N1INTER_T TYPE STRING,
N1BEGZT TYPE STRING,
N1ENDZT TYPE STRING,
N1INTER_H TYPE STRING,
N1ZYNR TYPE STRING,
MANU TYPE STRING,
N1MO TYPE STRING,
N1DI TYPE STRING,
N1MI TYPE STRING,
N1DO TYPE STRING,
N1FR TYPE STRING,
N1SA TYPE STRING,
N1SO TYPE STRING,
N1FEIERTAG TYPE STRING,
N1MINDAU_T TYPE STRING,
N1MAXDAU_T TYPE STRING,
N1MENGE TYPE STRING,
N1BEM TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNFN111_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_RNFN111_STR-MANDT sy-vline 
WA_RNFN111_STR-EINRI sy-vline 
WA_RNFN111_STR-FALNR sy-vline 
WA_RNFN111_STR-ORGID sy-vline 
WA_RNFN111_STR-LEIST sy-vline 
WA_RNFN111_STR-LNRLS sy-vline 
WA_RNFN111_STR-N1LFNR sy-vline 
WA_RNFN111_STR-N1BEGDT sy-vline 
WA_RNFN111_STR-N1ENDDT sy-vline 
WA_RNFN111_STR-N1INTER_T sy-vline 
WA_RNFN111_STR-N1BEGZT sy-vline 
WA_RNFN111_STR-N1ENDZT sy-vline 
WA_RNFN111_STR-N1INTER_H sy-vline 
WA_RNFN111_STR-N1ZYNR sy-vline 
WA_RNFN111_STR-MANU sy-vline 
WA_RNFN111_STR-N1MO sy-vline 
WA_RNFN111_STR-N1DI sy-vline 
WA_RNFN111_STR-N1MI sy-vline 
WA_RNFN111_STR-N1DO sy-vline 
WA_RNFN111_STR-N1FR sy-vline 
WA_RNFN111_STR-N1SA sy-vline 
WA_RNFN111_STR-N1SO sy-vline 
WA_RNFN111_STR-N1FEIERTAG sy-vline 
WA_RNFN111_STR-N1MINDAU_T sy-vline 
WA_RNFN111_STR-N1MAXDAU_T sy-vline 
WA_RNFN111_STR-N1MENGE sy-vline 
WA_RNFN111_STR-N1BEM sy-vline 
WA_RNFN111_STR-STORN sy-vline 
WA_RNFN111_STR-STUSR sy-vline 
WA_RNFN111_STR-STDAT sy-vline 
WA_RNFN111_STR-ERDAT sy-vline 
WA_RNFN111_STR-ERUSR sy-vline 
WA_RNFN111_STR-UPDAT sy-vline 
WA_RNFN111_STR-UPUSR sy-vline      INTO ld_text SEPARATED BY SPACE.

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