ABAP Select data from SAP table RFVIOP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVIOP
*  INTO TABLE @DATA(IT_RFVIOP2).
*--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_RFVIOP INDEX 1 INTO DATA(WA_RFVIOP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVIOP>-BUKRS = 1.
<RFVIOP>-KUNNR = 1.
<RFVIOP>-UMSKS = 1.
<RFVIOP>-UMSKZ = 1.
<RFVIOP>-AUGDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVIOP-AUGBL, sy-vline,
  WA_RFVIOP-ZUONR, sy-vline,
  WA_RFVIOP-GJAHR, sy-vline,
  WA_RFVIOP-BELNR, sy-vline,
  WA_RFVIOP-BUZEI, sy-vline,
  WA_RFVIOP-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVIOP 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_RFVIOP 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_RFVIOP INTO WA_RFVIOP.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVIOP-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIOP-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVIOP-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIOP-AUGBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RFVIOP-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIOP-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVIOP-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIOP-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVIOP-VERTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVIOP-VERTN.
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_RFVIOP_STR, 
BUKRS TYPE STRING,
KUNNR TYPE STRING,
UMSKS TYPE STRING,
UMSKZ TYPE STRING,
AUGDT TYPE STRING,
AUGBL TYPE STRING,
ZUONR TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
BUDAT TYPE STRING,
ZFBDT TYPE STRING,
BLART TYPE STRING,
BSCHL TYPE STRING,
ZUMSK TYPE STRING,
SHKZG TYPE STRING,
GSBER TYPE STRING,
VERTN TYPE STRING,
VBEWA TYPE STRING,
SMVART TYPE STRING,
DMIBEG TYPE STRING,
XREF1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVIOP_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_RFVIOP_STR-BUKRS sy-vline 
WA_RFVIOP_STR-KUNNR sy-vline 
WA_RFVIOP_STR-UMSKS sy-vline 
WA_RFVIOP_STR-UMSKZ sy-vline 
WA_RFVIOP_STR-AUGDT sy-vline 
WA_RFVIOP_STR-AUGBL sy-vline 
WA_RFVIOP_STR-ZUONR sy-vline 
WA_RFVIOP_STR-GJAHR sy-vline 
WA_RFVIOP_STR-BELNR sy-vline 
WA_RFVIOP_STR-BUZEI sy-vline 
WA_RFVIOP_STR-BUDAT sy-vline 
WA_RFVIOP_STR-ZFBDT sy-vline 
WA_RFVIOP_STR-BLART sy-vline 
WA_RFVIOP_STR-BSCHL sy-vline 
WA_RFVIOP_STR-ZUMSK sy-vline 
WA_RFVIOP_STR-SHKZG sy-vline 
WA_RFVIOP_STR-GSBER sy-vline 
WA_RFVIOP_STR-VERTN sy-vline 
WA_RFVIOP_STR-VBEWA sy-vline 
WA_RFVIOP_STR-SMVART sy-vline 
WA_RFVIOP_STR-DMIBEG sy-vline 
WA_RFVIOP_STR-XREF1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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