ABAP Select data from SAP table RFVIAO02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVIAO02 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 RFVIAO02. 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 RFVIAO02 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_RFVIAO02 TYPE STANDARD TABLE OF RFVIAO02,
      WA_RFVIAO02 TYPE RFVIAO02,
      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: <RFVIAO02> TYPE RFVIAO02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFVIAO02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVIAO02
  INTO TABLE IT_RFVIAO02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVIAO02
*  INTO TABLE @DATA(IT_RFVIAO022).
*--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_RFVIAO02 INDEX 1 INTO DATA(WA_RFVIAO022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVIAO02 ASSIGNING <RFVIAO02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVIAO02>-XSCRTITLE = 1.
<RFVIAO02>-XOBJTITLE = 1.
<RFVIAO02>-COMMAND = 1.
<RFVIAO02>-NOTELINES = 1.
<RFVIAO02>-FNIMG01 = 1.

ENDLOOP.

LOOP AT IT_RFVIAO02 INTO WA_RFVIAO02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVIAO02-FNIMG02, sy-vline,
  WA_RFVIAO02-FNIMG03, sy-vline,
  WA_RFVIAO02-BRIMG01, sy-vline,
  WA_RFVIAO02-BRIMG02, sy-vline,
  WA_RFVIAO02-BRIMG03, sy-vline,
  WA_RFVIAO02-TCINDEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVIAO02 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_RFVIAO02 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_RFVIAO02 INTO WA_RFVIAO02.


*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_RFVIAO02_STR, 
XSCRTITLE TYPE STRING,
XOBJTITLE TYPE STRING,
COMMAND TYPE STRING,
NOTELINES TYPE STRING,
FNIMG01 TYPE STRING,
FNIMG02 TYPE STRING,
FNIMG03 TYPE STRING,
BRIMG01 TYPE STRING,
BRIMG02 TYPE STRING,
BRIMG03 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_RFVIAO02_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_RFVIAO02_STR-XSCRTITLE sy-vline 
WA_RFVIAO02_STR-XOBJTITLE sy-vline 
WA_RFVIAO02_STR-COMMAND sy-vline 
WA_RFVIAO02_STR-NOTELINES sy-vline 
WA_RFVIAO02_STR-FNIMG01 sy-vline 
WA_RFVIAO02_STR-FNIMG02 sy-vline 
WA_RFVIAO02_STR-FNIMG03 sy-vline 
WA_RFVIAO02_STR-BRIMG01 sy-vline 
WA_RFVIAO02_STR-BRIMG02 sy-vline 
WA_RFVIAO02_STR-BRIMG03 sy-vline 
WA_RFVIAO02_STR-TCINDEX sy-vline 
WA_RFVIAO02_STR-TCDYNSIZE sy-vline 
WA_RFVIAO02_STR-TCTABSIZE sy-vline 
WA_RFVIAO02_STR-TCCOLSMAX sy-vline 
WA_RFVIAO02_STR-TCCOLSFIX sy-vline 
WA_RFVIAO02_STR-TCCOLSTOP sy-vline 
WA_RFVIAO02_STR-TCCOLSVIS sy-vline 
WA_RFVIAO02_STR-SORTINDEX sy-vline 
WA_RFVIAO02_STR-SORTORDER sy-vline 
WA_RFVIAO02_STR-XEMAIL sy-vline 
WA_RFVIAO02_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.