ABAP Select data from SAP table RNFEE_SCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNFEE_SCR
*  INTO TABLE @DATA(IT_RNFEE_SCR2).
*--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_RNFEE_SCR INDEX 1 INTO DATA(WA_RNFEE_SCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNFEE_SCR>-MANDT = 1.
<RNFEE_SCR>-EINRI = 1.
<RNFEE_SCR>-PARTNER = 1.
<RNFEE_SCR>-RANG = 1.
<RNFEE_SCR>-HONBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNFEE_SCR-BERVON, sy-vline,
  WA_RNFEE_SCR-BERBIS, sy-vline,
  WA_RNFEE_SCR-HONSVON, sy-vline,
  WA_RNFEE_SCR-HONSBIS, sy-vline,
  WA_RNFEE_SCR-PERSNR, sy-vline,
  WA_RNFEE_SCR-KREDNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNFEE_SCR 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_RNFEE_SCR 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_RNFEE_SCR INTO WA_RNFEE_SCR.


*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_RNFEE_SCR-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFEE_SCR-EINRI.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field KREDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNFEE_SCR-KREDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNFEE_SCR-KREDNR.
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_RNFEE_SCR_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
PARTNER TYPE STRING,
RANG TYPE STRING,
HONBER TYPE STRING,
BERVON TYPE STRING,
BERBIS TYPE STRING,
HONSVON TYPE STRING,
HONSBIS TYPE STRING,
PERSNR TYPE STRING,
KREDNR TYPE STRING,
EINTRITT TYPE STRING,
AUSTRITT TYPE STRING,
CRT_USR TYPE STRING,
CRT_DAT TYPE STRING,
CHG_USR TYPE STRING,
CHG_DAT TYPE STRING,
DEL_USR TYPE STRING,
DEL_DAT TYPE STRING,
DEL_FLG TYPE STRING,
AHVNR TYPE STRING,
USER1 TYPE STRING,
USER2 TYPE STRING,
USER3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNFEE_SCR_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_RNFEE_SCR_STR-MANDT sy-vline 
WA_RNFEE_SCR_STR-EINRI sy-vline 
WA_RNFEE_SCR_STR-PARTNER sy-vline 
WA_RNFEE_SCR_STR-RANG sy-vline 
WA_RNFEE_SCR_STR-HONBER sy-vline 
WA_RNFEE_SCR_STR-BERVON sy-vline 
WA_RNFEE_SCR_STR-BERBIS sy-vline 
WA_RNFEE_SCR_STR-HONSVON sy-vline 
WA_RNFEE_SCR_STR-HONSBIS sy-vline 
WA_RNFEE_SCR_STR-PERSNR sy-vline 
WA_RNFEE_SCR_STR-KREDNR sy-vline 
WA_RNFEE_SCR_STR-EINTRITT sy-vline 
WA_RNFEE_SCR_STR-AUSTRITT sy-vline 
WA_RNFEE_SCR_STR-CRT_USR sy-vline 
WA_RNFEE_SCR_STR-CRT_DAT sy-vline 
WA_RNFEE_SCR_STR-CHG_USR sy-vline 
WA_RNFEE_SCR_STR-CHG_DAT sy-vline 
WA_RNFEE_SCR_STR-DEL_USR sy-vline 
WA_RNFEE_SCR_STR-DEL_DAT sy-vline 
WA_RNFEE_SCR_STR-DEL_FLG sy-vline 
WA_RNFEE_SCR_STR-AHVNR sy-vline 
WA_RNFEE_SCR_STR-USER1 sy-vline 
WA_RNFEE_SCR_STR-USER2 sy-vline 
WA_RNFEE_SCR_STR-USER3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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