ABAP Select data from SAP table RFVIAO03 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVIAO03 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 RFVIAO03. 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 RFVIAO03 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_RFVIAO03 TYPE STANDARD TABLE OF RFVIAO03,
      WA_RFVIAO03 TYPE RFVIAO03,
      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: <RFVIAO03> TYPE RFVIAO03.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFVIAO03.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVIAO03
  INTO TABLE IT_RFVIAO03.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVIAO03
*  INTO TABLE @DATA(IT_RFVIAO032).
*--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_RFVIAO03 INDEX 1 INTO DATA(WA_RFVIAO032).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVIAO03 ASSIGNING <RFVIAO03>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVIAO03>-XSCRTITLE = 1.
<RFVIAO03>-XOBJTITLE = 1.
<RFVIAO03>-COMMAND = 1.
<RFVIAO03>-TCINDEX = 1.
<RFVIAO03>-TCDYNSIZE = 1.

ENDLOOP.

LOOP AT IT_RFVIAO03 INTO WA_RFVIAO03.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVIAO03-TCTABSIZE, sy-vline,
  WA_RFVIAO03-TCCOLSMAX, sy-vline,
  WA_RFVIAO03-TCCOLSFIX, sy-vline,
  WA_RFVIAO03-TCCOLSTOP, sy-vline,
  WA_RFVIAO03-TCCOLSVIS, sy-vline,
  WA_RFVIAO03-SORTINDEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVIAO03 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_RFVIAO03 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_RFVIAO03 INTO WA_RFVIAO03.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFVIAO03_STR, 
XSCRTITLE TYPE STRING,
XOBJTITLE TYPE STRING,
COMMAND TYPE STRING,
TCINDEX TYPE STRING,
TCDYNSIZE TYPE STRING,
TCTABSIZE TYPE STRING,
TCCOLSMAX TYPE STRING,
TCCOLSFIX TYPE STRING,
TCCOLSTOP TYPE STRING,
TCCOLSVIS TYPE STRING,
SORTINDEX TYPE STRING,
SORTORDER TYPE STRING,
XEMAIL TYPE STRING,
XERRFIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVIAO03_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_RFVIAO03_STR-XSCRTITLE sy-vline 
WA_RFVIAO03_STR-XOBJTITLE sy-vline 
WA_RFVIAO03_STR-COMMAND sy-vline 
WA_RFVIAO03_STR-TCINDEX sy-vline 
WA_RFVIAO03_STR-TCDYNSIZE sy-vline 
WA_RFVIAO03_STR-TCTABSIZE sy-vline 
WA_RFVIAO03_STR-TCCOLSMAX sy-vline 
WA_RFVIAO03_STR-TCCOLSFIX sy-vline 
WA_RFVIAO03_STR-TCCOLSTOP sy-vline 
WA_RFVIAO03_STR-TCCOLSVIS sy-vline 
WA_RFVIAO03_STR-SORTINDEX sy-vline 
WA_RFVIAO03_STR-SORTORDER sy-vline 
WA_RFVIAO03_STR-XEMAIL sy-vline 
WA_RFVIAO03_STR-XERRFIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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