ABAP Select data from SAP table RFVAI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVAI
*  INTO TABLE @DATA(IT_RFVAI2).
*--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_RFVAI INDEX 1 INTO DATA(WA_RFVAI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVAI>-JUMB = 1.
<RFVAI>-BETRAGALT = 1.
<RFVAI>-PROZS = 1.
<RFVAI>-BETRUMB = 1.
<RFVAI>-BETRREST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVAI-SINVO, sy-vline,
  WA_RFVAI-JVOLLAB, sy-vline,
  WA_RFVAI-BSUMBUCH, sy-vline,
  WA_RFVAI-BVSTALT, sy-vline,
  WA_RFVAI-BVSTUMB, sy-vline,
  WA_RFVAI-BVSTREST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVAI 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_RFVAI 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_RFVAI INTO WA_RFVAI.


*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 SINVO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVAI-SINVO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVAI-SINVO.
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_RFVAI_STR, 
JUMB TYPE STRING,
BETRAGALT TYPE STRING,
PROZS TYPE STRING,
BETRUMB TYPE STRING,
BETRREST TYPE STRING,
SINVO TYPE STRING,
JVOLLAB TYPE STRING,
BSUMBUCH TYPE STRING,
BVSTALT TYPE STRING,
BVSTUMB TYPE STRING,
BVSTREST TYPE STRING,
PROZVST TYPE STRING,
BSREST TYPE STRING,
BSALT TYPE STRING,
BSVALT TYPE STRING,
BSVUMB TYPE STRING,
BPAUSCH TYPE STRING,
BVPAUSCH TYPE STRING,
BSVREST TYPE STRING,
BPAUALT TYPE STRING,
BVPAUALT TYPE STRING,
PPAUNEU TYPE STRING,
PVPAUNEU TYPE STRING,
JPVOLLAB TYPE STRING,
PSPROZ TYPE STRING,
PSVPROZ TYPE STRING,
VMWSKZ TYPE STRING,
JABGKZ TYPE STRING,
BABVS TYPE STRING,
BNAVS TYPE STRING,
JPABGKZ TYPE STRING,
POPTSATZ TYPE STRING,
PPOPTSATZ TYPE STRING,
DGPLAB TYPE STRING,
NBUZEI TYPE STRING,
BAPAUALT TYPE STRING,
BNPAUALT TYPE STRING,
DGPLABP TYPE STRING,
POPTSATZP TYPE STRING,
JVOLLABP TYPE STRING,
PROZSP TYPE STRING,
BETRUMBP TYPE STRING,
BVSTUMBP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVAI_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_RFVAI_STR-JUMB sy-vline 
WA_RFVAI_STR-BETRAGALT sy-vline 
WA_RFVAI_STR-PROZS sy-vline 
WA_RFVAI_STR-BETRUMB sy-vline 
WA_RFVAI_STR-BETRREST sy-vline 
WA_RFVAI_STR-SINVO sy-vline 
WA_RFVAI_STR-JVOLLAB sy-vline 
WA_RFVAI_STR-BSUMBUCH sy-vline 
WA_RFVAI_STR-BVSTALT sy-vline 
WA_RFVAI_STR-BVSTUMB sy-vline 
WA_RFVAI_STR-BVSTREST sy-vline 
WA_RFVAI_STR-PROZVST sy-vline 
WA_RFVAI_STR-BSREST sy-vline 
WA_RFVAI_STR-BSALT sy-vline 
WA_RFVAI_STR-BSVALT sy-vline 
WA_RFVAI_STR-BSVUMB sy-vline 
WA_RFVAI_STR-BPAUSCH sy-vline 
WA_RFVAI_STR-BVPAUSCH sy-vline 
WA_RFVAI_STR-BSVREST sy-vline 
WA_RFVAI_STR-BPAUALT sy-vline 
WA_RFVAI_STR-BVPAUALT sy-vline 
WA_RFVAI_STR-PPAUNEU sy-vline 
WA_RFVAI_STR-PVPAUNEU sy-vline 
WA_RFVAI_STR-JPVOLLAB sy-vline 
WA_RFVAI_STR-PSPROZ sy-vline 
WA_RFVAI_STR-PSVPROZ sy-vline 
WA_RFVAI_STR-VMWSKZ sy-vline 
WA_RFVAI_STR-JABGKZ sy-vline 
WA_RFVAI_STR-BABVS sy-vline 
WA_RFVAI_STR-BNAVS sy-vline 
WA_RFVAI_STR-JPABGKZ sy-vline 
WA_RFVAI_STR-POPTSATZ sy-vline 
WA_RFVAI_STR-PPOPTSATZ sy-vline 
WA_RFVAI_STR-DGPLAB sy-vline 
WA_RFVAI_STR-NBUZEI sy-vline 
WA_RFVAI_STR-BAPAUALT sy-vline 
WA_RFVAI_STR-BNPAUALT sy-vline 
WA_RFVAI_STR-DGPLABP sy-vline 
WA_RFVAI_STR-POPTSATZP sy-vline 
WA_RFVAI_STR-JVOLLABP sy-vline 
WA_RFVAI_STR-PROZSP sy-vline 
WA_RFVAI_STR-BETRUMBP sy-vline 
WA_RFVAI_STR-BVSTUMBP sy-vline      INTO ld_text SEPARATED BY SPACE.

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