ABAP Select data from SAP table RFVIRS02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVIRS02 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 RFVIRS02. 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 RFVIRS02 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_RFVIRS02 TYPE STANDARD TABLE OF RFVIRS02,
      WA_RFVIRS02 TYPE RFVIRS02,
      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: <RFVIRS02> TYPE RFVIRS02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFVIRS02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVIRS02
  INTO TABLE IT_RFVIRS02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVIRS02
*  INTO TABLE @DATA(IT_RFVIRS022).
*--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_RFVIRS02 INDEX 1 INTO DATA(WA_RFVIRS022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVIRS02 ASSIGNING <RFVIRS02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVIRS02>-MANDT = 1.
<RFVIRS02>-INTRENO = 1.
<RFVIRS02>-SRSRESBNO = 1.
<RFVIRS02>-SRSPARANO = 1.
<RFVIRS02>-SRSPARTYP = 1.

ENDLOOP.

LOOP AT IT_RFVIRS02 INTO WA_RFVIRS02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVIRS02-RSPARDAT, sy-vline,
  WA_RFVIRS02-RSPARJHR, sy-vline,
  WA_RFVIRS02-RSPARMON, sy-vline,
  WA_RFVIRS02-RSPARDAY, sy-vline,
  WA_RFVIRS02-RSPARNUM, sy-vline,
  WA_RFVIRS02-RSPARBLN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVIRS02 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_RFVIRS02 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_RFVIRS02 INTO WA_RFVIRS02.


*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 GJAHR, internal->external for field RSPARJHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RFVIRS02-RSPARJHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIRS02-RSPARJHR.
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_RFVIRS02_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
SRSRESBNO TYPE STRING,
SRSPARANO TYPE STRING,
SRSPARTYP TYPE STRING,
RSPARDAT TYPE STRING,
RSPARJHR TYPE STRING,
RSPARMON TYPE STRING,
RSPARDAY TYPE STRING,
RSPARNUM TYPE STRING,
RSPARBLN TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVIRS02_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_RFVIRS02_STR-MANDT sy-vline 
WA_RFVIRS02_STR-INTRENO sy-vline 
WA_RFVIRS02_STR-SRSRESBNO sy-vline 
WA_RFVIRS02_STR-SRSPARANO sy-vline 
WA_RFVIRS02_STR-SRSPARTYP sy-vline 
WA_RFVIRS02_STR-RSPARDAT sy-vline 
WA_RFVIRS02_STR-RSPARJHR sy-vline 
WA_RFVIRS02_STR-RSPARMON sy-vline 
WA_RFVIRS02_STR-RSPARDAY sy-vline 
WA_RFVIRS02_STR-RSPARNUM sy-vline 
WA_RFVIRS02_STR-RSPARBLN sy-vline 
WA_RFVIRS02_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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