ABAP Select data from SAP table RFVIAO05 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVIAO05 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 RFVIAO05. 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 RFVIAO05 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_RFVIAO05 TYPE STANDARD TABLE OF RFVIAO05,
      WA_RFVIAO05 TYPE RFVIAO05,
      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: <RFVIAO05> TYPE RFVIAO05.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFVIAO05.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVIAO05
  INTO TABLE IT_RFVIAO05.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVIAO05
*  INTO TABLE @DATA(IT_RFVIAO052).
*--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_RFVIAO05 INDEX 1 INTO DATA(WA_RFVIAO052).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVIAO05 ASSIGNING <RFVIAO05>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVIAO05>-XSCRTITLE = 1.
<RFVIAO05>-XNOLIST = 1.
<RFVIAO05>-TCINDEX = 1.
<RFVIAO05>-TCDYNSIZE = 1.
<RFVIAO05>-TCTABSIZE = 1.

ENDLOOP.

LOOP AT IT_RFVIAO05 INTO WA_RFVIAO05.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVIAO05-TCCOLSMAX, sy-vline,
  WA_RFVIAO05-TCCOLSFIX, sy-vline,
  WA_RFVIAO05-TCCOLSTOP, sy-vline,
  WA_RFVIAO05-TCCOLSVIS, sy-vline,
  WA_RFVIAO05-SORTINDEX, sy-vline,
  WA_RFVIAO05-SORTORDER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVIAO05 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_RFVIAO05 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_RFVIAO05 INTO WA_RFVIAO05.


*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 CUNIT, internal->external for field AREAKEY
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RFVIAO05-AREAKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIAO05-AREAKEY.
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_RFVIAO05_STR, 
XSCRTITLE TYPE STRING,
XNOLIST 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,
CURRKEY TYPE STRING,
AREAKEY TYPE STRING,
PCORREL TYPE STRING,
XCORREL TYPE STRING,
SFAFEXISTS TYPE STRING,
SFAFWANTED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVIAO05_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_RFVIAO05_STR-XSCRTITLE sy-vline 
WA_RFVIAO05_STR-XNOLIST sy-vline 
WA_RFVIAO05_STR-TCINDEX sy-vline 
WA_RFVIAO05_STR-TCDYNSIZE sy-vline 
WA_RFVIAO05_STR-TCTABSIZE sy-vline 
WA_RFVIAO05_STR-TCCOLSMAX sy-vline 
WA_RFVIAO05_STR-TCCOLSFIX sy-vline 
WA_RFVIAO05_STR-TCCOLSTOP sy-vline 
WA_RFVIAO05_STR-TCCOLSVIS sy-vline 
WA_RFVIAO05_STR-SORTINDEX sy-vline 
WA_RFVIAO05_STR-SORTORDER sy-vline 
WA_RFVIAO05_STR-CURRKEY sy-vline 
WA_RFVIAO05_STR-AREAKEY sy-vline 
WA_RFVIAO05_STR-PCORREL sy-vline 
WA_RFVIAO05_STR-XCORREL sy-vline 
WA_RFVIAO05_STR-SFAFEXISTS sy-vline 
WA_RFVIAO05_STR-SFAFWANTED sy-vline      INTO ld_text SEPARATED BY SPACE.

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