ABAP Select data from SAP table RNF55 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNF55 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 RNF55. 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 RNF55 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_RNF55 TYPE STANDARD TABLE OF RNF55,
      WA_RNF55 TYPE RNF55,
      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: <RNF55> TYPE RNF55.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNF55.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNF55
  INTO TABLE IT_RNF55.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNF55
*  INTO TABLE @DATA(IT_RNF552).
*--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_RNF55 INDEX 1 INTO DATA(WA_RNF552).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNF55 ASSIGNING <RNF55>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNF55>-DOKAR = 1.
<RNF55>-DOKNR = 1.
<RNF55>-DOKVR = 1.
<RNF55>-DOKTL = 1.
<RNF55>-DKTXT = 1.

ENDLOOP.

LOOP AT IT_RNF55 INTO WA_RNF55.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNF55-EXTNR, sy-vline,
  WA_RNF55-ORGFORM, sy-vline,
  WA_RNF55-EINRI, sy-vline,
  WA_RNF55-PATNR, sy-vline,
  WA_RNF55-FALNR, sy-vline,
  WA_RNF55-FALAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNF55 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_RNF55 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_RNF55 INTO WA_RNF55.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-ORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGDO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-ORGDO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-ORGDO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ARCHIV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-ARCHIV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-ARCHIV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STANDORT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF55-STANDORT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF55-STANDORT.
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_RNF55_STR, 
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DKTXT TYPE STRING,
EXTNR TYPE STRING,
ORGFORM TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
FALAR TYPE STRING,
ORGFA TYPE STRING,
ORGFAKB TYPE STRING,
ORGPF TYPE STRING,
ORGPFKB TYPE STRING,
ORGDO TYPE STRING,
ORGDOKB TYPE STRING,
ARCHIV TYPE STRING,
ARCHIVKB TYPE STRING,
STANDORT TYPE STRING,
STANDKB TYPE STRING,
MICROF TYPE STRING,
ALBUM TYPE STRING,
ROLLNO TYPE STRING,
INFOMR TYPE STRING,
TEMPMR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNF55_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_RNF55_STR-DOKAR sy-vline 
WA_RNF55_STR-DOKNR sy-vline 
WA_RNF55_STR-DOKVR sy-vline 
WA_RNF55_STR-DOKTL sy-vline 
WA_RNF55_STR-DKTXT sy-vline 
WA_RNF55_STR-EXTNR sy-vline 
WA_RNF55_STR-ORGFORM sy-vline 
WA_RNF55_STR-EINRI sy-vline 
WA_RNF55_STR-PATNR sy-vline 
WA_RNF55_STR-FALNR sy-vline 
WA_RNF55_STR-FALAR sy-vline 
WA_RNF55_STR-ORGFA sy-vline 
WA_RNF55_STR-ORGFAKB sy-vline 
WA_RNF55_STR-ORGPF sy-vline 
WA_RNF55_STR-ORGPFKB sy-vline 
WA_RNF55_STR-ORGDO sy-vline 
WA_RNF55_STR-ORGDOKB sy-vline 
WA_RNF55_STR-ARCHIV sy-vline 
WA_RNF55_STR-ARCHIVKB sy-vline 
WA_RNF55_STR-STANDORT sy-vline 
WA_RNF55_STR-STANDKB sy-vline 
WA_RNF55_STR-MICROF sy-vline 
WA_RNF55_STR-ALBUM sy-vline 
WA_RNF55_STR-ROLLNO sy-vline 
WA_RNF55_STR-INFOMR sy-vline 
WA_RNF55_STR-TEMPMR sy-vline      INTO ld_text SEPARATED BY SPACE.

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