ABAP Select data from SAP table RNF64 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNF64 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 RNF64. 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 RNF64 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_RNF64 TYPE STANDARD TABLE OF RNF64,
      WA_RNF64 TYPE RNF64,
      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: <RNF64> TYPE RNF64.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNF64.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNF64
  INTO TABLE IT_RNF64.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNF64
*  INTO TABLE @DATA(IT_RNF642).
*--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_RNF64 INDEX 1 INTO DATA(WA_RNF642).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNF64 ASSIGNING <RNF64>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNF64>-LNRIC = 1.
<RNF64>-LFDBEW = 1.
<RNF64>-ICPMK = 1.
<RNF64>-ICPML = 1.
<RNF64>-ICPHC = 1.

ENDLOOP.

LOOP AT IT_RNF64 INTO WA_RNF64.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNF64-ANZOP, sy-vline,
  WA_RNF64-BGDOP, sy-vline,
  WA_RNF64-BZTOP, sy-vline,
  WA_RNF64-EZTOP, sy-vline,
  WA_RNF64-LSLOK, sy-vline,
  WA_RNF64-IDENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNF64 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_RNF64 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_RNF64 INTO WA_RNF64.


*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 LNRIC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-LNRIC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-LNRIC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICPMK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ICPMK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ICPMK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICPML
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ICPML
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ICPML.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LSLOK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-LSLOK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-LSLOK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IDENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-IDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-IDENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-OPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-OPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ICORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ICORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICFAKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ICFAKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ICFAKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ICORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ICORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ICPML_REF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ICPML_REF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ICPML_REF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTGA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-ENTGA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-ENTGA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DIAGW
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-DIAGW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-DIAGW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DIALO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF64-DIALO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF64-DIALO.
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_RNF64_STR, 
LNRIC TYPE STRING,
LFDBEW TYPE STRING,
ICPMK TYPE STRING,
ICPML TYPE STRING,
ICPHC TYPE STRING,
ANZOP TYPE STRING,
BGDOP TYPE STRING,
BZTOP TYPE STRING,
EZTOP TYPE STRING,
LSLOK TYPE STRING,
IDENT TYPE STRING,
OPART TYPE STRING,
BTEXT TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
ENDOP TYPE STRING,
ICPKT TYPE STRING,
ICPLT TYPE STRING,
ICBWIDT TYPE STRING,
ICBWIZT TYPE STRING,
ICBWART TYPE STRING,
ICBWATX TYPE STRING,
ICORGFA TYPE STRING,
ICFAKEY TYPE STRING,
ICORGPF TYPE STRING,
DRG_SEQNO TYPE STRING,
DRG_CATEGORY TYPE STRING,
DRG_RELEVANT TYPE STRING,
PRTYP TYPE STRING,
ICPML_REF TYPE STRING,
ENTGA TYPE STRING,
DRG_IMPACT TYPE STRING,
CCL TYPE STRING,
OPLEBSPEN TYPE STRING,
LNRDI TYPE STRING,
DITXT TYPE STRING,
DKAT1 TYPE STRING,
DKEY1 TYPE STRING,
DKAT_REF TYPE STRING,
DKEY_REF TYPE STRING,
DTEXT1 TYPE STRING,
DTEXT2 TYPE STRING,
DTEXT3 TYPE STRING,
DREFTEXT1 TYPE STRING,
DREFTEXT2 TYPE STRING,
DREFTEXT3 TYPE STRING,
DIAGW TYPE STRING,
DIALO TYPE STRING,
DTYP1 TYPE STRING,
DTYP2 TYPE STRING,
DTYP_REF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNF64_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_RNF64_STR-LNRIC sy-vline 
WA_RNF64_STR-LFDBEW sy-vline 
WA_RNF64_STR-ICPMK sy-vline 
WA_RNF64_STR-ICPML sy-vline 
WA_RNF64_STR-ICPHC sy-vline 
WA_RNF64_STR-ANZOP sy-vline 
WA_RNF64_STR-BGDOP sy-vline 
WA_RNF64_STR-BZTOP sy-vline 
WA_RNF64_STR-EZTOP sy-vline 
WA_RNF64_STR-LSLOK sy-vline 
WA_RNF64_STR-IDENT sy-vline 
WA_RNF64_STR-OPART sy-vline 
WA_RNF64_STR-BTEXT sy-vline 
WA_RNF64_STR-ORGFA sy-vline 
WA_RNF64_STR-ORGPF sy-vline 
WA_RNF64_STR-ENDOP sy-vline 
WA_RNF64_STR-ICPKT sy-vline 
WA_RNF64_STR-ICPLT sy-vline 
WA_RNF64_STR-ICBWIDT sy-vline 
WA_RNF64_STR-ICBWIZT sy-vline 
WA_RNF64_STR-ICBWART sy-vline 
WA_RNF64_STR-ICBWATX sy-vline 
WA_RNF64_STR-ICORGFA sy-vline 
WA_RNF64_STR-ICFAKEY sy-vline 
WA_RNF64_STR-ICORGPF sy-vline 
WA_RNF64_STR-DRG_SEQNO sy-vline 
WA_RNF64_STR-DRG_CATEGORY sy-vline 
WA_RNF64_STR-DRG_RELEVANT sy-vline 
WA_RNF64_STR-PRTYP sy-vline 
WA_RNF64_STR-ICPML_REF sy-vline 
WA_RNF64_STR-ENTGA sy-vline 
WA_RNF64_STR-DRG_IMPACT sy-vline 
WA_RNF64_STR-CCL sy-vline 
WA_RNF64_STR-OPLEBSPEN sy-vline 
WA_RNF64_STR-LNRDI sy-vline 
WA_RNF64_STR-DITXT sy-vline 
WA_RNF64_STR-DKAT1 sy-vline 
WA_RNF64_STR-DKEY1 sy-vline 
WA_RNF64_STR-DKAT_REF sy-vline 
WA_RNF64_STR-DKEY_REF sy-vline 
WA_RNF64_STR-DTEXT1 sy-vline 
WA_RNF64_STR-DTEXT2 sy-vline 
WA_RNF64_STR-DTEXT3 sy-vline 
WA_RNF64_STR-DREFTEXT1 sy-vline 
WA_RNF64_STR-DREFTEXT2 sy-vline 
WA_RNF64_STR-DREFTEXT3 sy-vline 
WA_RNF64_STR-DIAGW sy-vline 
WA_RNF64_STR-DIALO sy-vline 
WA_RNF64_STR-DTYP1 sy-vline 
WA_RNF64_STR-DTYP2 sy-vline 
WA_RNF64_STR-DTYP_REF sy-vline      INTO ld_text SEPARATED BY SPACE.

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