ABAP Select data from SAP table FVG2_EVENTS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FVG2_EVENTS 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 FVG2_EVENTS. 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 FVG2_EVENTS 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_FVG2_EVENTS TYPE STANDARD TABLE OF FVG2_EVENTS,
      WA_FVG2_EVENTS TYPE FVG2_EVENTS,
      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: <FVG2_EVENTS> TYPE FVG2_EVENTS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FVG2_EVENTS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FVG2_EVENTS
  INTO TABLE IT_FVG2_EVENTS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FVG2_EVENTS
*  INTO TABLE @DATA(IT_FVG2_EVENTS2).
*--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_FVG2_EVENTS INDEX 1 INTO DATA(WA_FVG2_EVENTS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FVG2_EVENTS ASSIGNING <FVG2_EVENTS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FVG2_EVENTS>-XVIOB01 = 1.
<FVG2_EVENTS>-XVIOB02 = 1.
<FVG2_EVENTS>-XVIOB03 = 1.
<FVG2_EVENTS>-XVIMI01 = 1.
<FVG2_EVENTS>-XVIMIMV = 1.

ENDLOOP.

LOOP AT IT_FVG2_EVENTS INTO WA_FVG2_EVENTS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FVG2_EVENTS-XARFLZ, sy-vline,
  WA_FVG2_EVENTS-XARFLOBMAZ, sy-vline,
  WA_FVG2_EVENTS-XARFLKG, sy-vline,
  WA_FVG2_EVENTS-XARRAZ, sy-vline,
  WA_FVG2_EVENTS-XARRAOBMAZ, sy-vline,
  WA_FVG2_EVENTS-XARRAKG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FVG2_EVENTS 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_FVG2_EVENTS 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_FVG2_EVENTS INTO WA_FVG2_EVENTS.


*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_FVG2_EVENTS_STR, 
XVIOB01 TYPE STRING,
XVIOB02 TYPE STRING,
XVIOB03 TYPE STRING,
XVIMI01 TYPE STRING,
XVIMIMV TYPE STRING,
XARFLZ TYPE STRING,
XARFLOBMAZ TYPE STRING,
XARFLKG TYPE STRING,
XARRAZ TYPE STRING,
XARRAOBMAZ TYPE STRING,
XARRAKG TYPE STRING,
XVMFLZ TYPE STRING,
XFLBW TYPE STRING,
XOBMAZ TYPE STRING,
XFLKG TYPE STRING,
XADR TYPE STRING,
XGPART TYPE STRING,
XVIOB42WE TYPE STRING,
XVIOB42GR TYPE STRING,
XVIOB42GE TYPE STRING,
XVIOB42ME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FVG2_EVENTS_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_FVG2_EVENTS_STR-XVIOB01 sy-vline 
WA_FVG2_EVENTS_STR-XVIOB02 sy-vline 
WA_FVG2_EVENTS_STR-XVIOB03 sy-vline 
WA_FVG2_EVENTS_STR-XVIMI01 sy-vline 
WA_FVG2_EVENTS_STR-XVIMIMV sy-vline 
WA_FVG2_EVENTS_STR-XARFLZ sy-vline 
WA_FVG2_EVENTS_STR-XARFLOBMAZ sy-vline 
WA_FVG2_EVENTS_STR-XARFLKG sy-vline 
WA_FVG2_EVENTS_STR-XARRAZ sy-vline 
WA_FVG2_EVENTS_STR-XARRAOBMAZ sy-vline 
WA_FVG2_EVENTS_STR-XARRAKG sy-vline 
WA_FVG2_EVENTS_STR-XVMFLZ sy-vline 
WA_FVG2_EVENTS_STR-XFLBW sy-vline 
WA_FVG2_EVENTS_STR-XOBMAZ sy-vline 
WA_FVG2_EVENTS_STR-XFLKG sy-vline 
WA_FVG2_EVENTS_STR-XADR sy-vline 
WA_FVG2_EVENTS_STR-XGPART sy-vline 
WA_FVG2_EVENTS_STR-XVIOB42WE sy-vline 
WA_FVG2_EVENTS_STR-XVIOB42GR sy-vline 
WA_FVG2_EVENTS_STR-XVIOB42GE sy-vline 
WA_FVG2_EVENTS_STR-XVIOB42ME sy-vline      INTO ld_text SEPARATED BY SPACE.

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