ABAP Select data from SAP table RN200 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 RN200 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 RN200. 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 RN200 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_RN200 TYPE STANDARD TABLE OF RN200,
      WA_RN200 TYPE RN200,
      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: <RN200> TYPE RN200.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN200.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN200
  INTO TABLE IT_RN200.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN200
*  INTO TABLE @DATA(IT_RN2002).
*--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_RN200 INDEX 1 INTO DATA(WA_RN2002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN200 ASSIGNING <RN200>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN200>-BEGDT = 1.
<RN200>-DAT = 1.
<RN200>-DEID = 1.
<RN200>-DOCSECINDEX1 = 1.
<RN200>-DOKELTYP = 1.

ENDLOOP.

LOOP AT IT_RN200 INTO WA_RN200.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN200-DTART1, sy-vline,
  WA_RN200-EINKB, sy-vline,
  WA_RN200-EINRI, sy-vline,
  WA_RN200-ENDDT, sy-vline,
  WA_RN200-FLAG, sy-vline,
  WA_RN200-HEX1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN200 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_RN200 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_RN200 INTO WA_RN200.


*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_RN200-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN200-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VORL_EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN200-VORL_EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN200-VORL_EINRI.
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_RN200_STR, 
BEGDT TYPE STRING,
DAT TYPE STRING,
DEID TYPE STRING,
DOCSECINDEX1 TYPE STRING,
DOKELTYP TYPE STRING,
DTART1 TYPE STRING,
EINKB TYPE STRING,
EINRI TYPE STRING,
ENDDT TYPE STRING,
FLAG TYPE STRING,
HEX1 TYPE STRING,
KATKB TYPE STRING,
LOEINC TYPE STRING,
LOEKZ TYPE STRING,
LOENO TYPE STRING,
LOEYES TYPE STRING,
MARK TYPE STRING,
MLDG30 TYPE STRING,
MLDG35 TYPE STRING,
NAME15 TYPE STRING,
NAME30 TYPE STRING,
NAME40 TYPE STRING,
NAME45 TYPE STRING,
NAME50 TYPE STRING,
NAME60 TYPE STRING,
NAME80 TYPE STRING,
ORGLAKB TYPE STRING,
ORGLEKB TYPE STRING,
PATHL TYPE STRING,
POAKT TYPE STRING,
POGES TYPE STRING,
RTEXT80 TYPE STRING,
SELKR TYPE STRING,
TEXT1 TYPE STRING,
TEXT8 TYPE STRING,
TEXT10 TYPE STRING,
TEXT15 TYPE STRING,
TEXT30 TYPE STRING,
TEXT40 TYPE STRING,
TEXT45 TYPE STRING,
TEXT50 TYPE STRING,
TEXT60 TYPE STRING,
TEXT80 TYPE STRING,
TEXT255 TYPE STRING,
TIME TYPE STRING,
VORL_DTID TYPE STRING,
VORL_VERS TYPE STRING,
VORL_EINRI TYPE STRING,
VORL_EINKB TYPE STRING,
SEC_INDEX1 TYPE STRING,
BA_TMPFAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN200_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_RN200_STR-BEGDT sy-vline 
WA_RN200_STR-DAT sy-vline 
WA_RN200_STR-DEID sy-vline 
WA_RN200_STR-DOCSECINDEX1 sy-vline 
WA_RN200_STR-DOKELTYP sy-vline 
WA_RN200_STR-DTART1 sy-vline 
WA_RN200_STR-EINKB sy-vline 
WA_RN200_STR-EINRI sy-vline 
WA_RN200_STR-ENDDT sy-vline 
WA_RN200_STR-FLAG sy-vline 
WA_RN200_STR-HEX1 sy-vline 
WA_RN200_STR-KATKB sy-vline 
WA_RN200_STR-LOEINC sy-vline 
WA_RN200_STR-LOEKZ sy-vline 
WA_RN200_STR-LOENO sy-vline 
WA_RN200_STR-LOEYES sy-vline 
WA_RN200_STR-MARK sy-vline 
WA_RN200_STR-MLDG30 sy-vline 
WA_RN200_STR-MLDG35 sy-vline 
WA_RN200_STR-NAME15 sy-vline 
WA_RN200_STR-NAME30 sy-vline 
WA_RN200_STR-NAME40 sy-vline 
WA_RN200_STR-NAME45 sy-vline 
WA_RN200_STR-NAME50 sy-vline 
WA_RN200_STR-NAME60 sy-vline 
WA_RN200_STR-NAME80 sy-vline 
WA_RN200_STR-ORGLAKB sy-vline 
WA_RN200_STR-ORGLEKB sy-vline 
WA_RN200_STR-PATHL sy-vline 
WA_RN200_STR-POAKT sy-vline 
WA_RN200_STR-POGES sy-vline 
WA_RN200_STR-RTEXT80 sy-vline 
WA_RN200_STR-SELKR sy-vline 
WA_RN200_STR-TEXT1 sy-vline 
WA_RN200_STR-TEXT8 sy-vline 
WA_RN200_STR-TEXT10 sy-vline 
WA_RN200_STR-TEXT15 sy-vline 
WA_RN200_STR-TEXT30 sy-vline 
WA_RN200_STR-TEXT40 sy-vline 
WA_RN200_STR-TEXT45 sy-vline 
WA_RN200_STR-TEXT50 sy-vline 
WA_RN200_STR-TEXT60 sy-vline 
WA_RN200_STR-TEXT80 sy-vline 
WA_RN200_STR-TEXT255 sy-vline 
WA_RN200_STR-TIME sy-vline 
WA_RN200_STR-VORL_DTID sy-vline 
WA_RN200_STR-VORL_VERS sy-vline 
WA_RN200_STR-VORL_EINRI sy-vline 
WA_RN200_STR-VORL_EINKB sy-vline 
WA_RN200_STR-SEC_INDEX1 sy-vline 
WA_RN200_STR-BA_TMPFAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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