ABAP Select data from SAP table V_EVENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_EVENT
*  INTO TABLE @DATA(IT_V_EVENT2).
*--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_V_EVENT INDEX 1 INTO DATA(WA_V_EVENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_EVENT>-MANDT = 1.
<V_EVENT>-PLOBJ = 1.
<V_EVENT>-STFNA = 1.
<V_EVENT>-ERNMR = 1.
<V_EVENT>-RELDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_EVENT-VRSIO, sy-vline,
  WA_V_EVENT-SSOUR, sy-vline,
  WA_V_EVENT-RELST, sy-vline,
  WA_V_EVENT-REVLU, sy-vline,
  WA_V_EVENT-GSTRU, sy-vline,
  WA_V_EVENT-RFERE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_EVENT 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_V_EVENT 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_V_EVENT INTO WA_V_EVENT.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_V_EVENT-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_EVENT-SPRAS.
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_V_EVENT_STR, 
MANDT TYPE STRING,
PLOBJ TYPE STRING,
STFNA TYPE STRING,
ERNMR TYPE STRING,
RELDA TYPE STRING,
VRSIO TYPE STRING,
SSOUR TYPE STRING,
RELST TYPE STRING,
REVLU TYPE STRING,
GSTRU TYPE STRING,
RFERE TYPE STRING,
ERTYP TYPE STRING,
EREST TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
ANZEP TYPE STRING,
OPERA TYPE STRING,
ERVAL TYPE STRING,
DECIM TYPE STRING,
EXPON TYPE STRING,
ERPOS TYPE STRING,
SPRAS TYPE STRING,
ERETX TYPE STRING,
ETXNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_EVENT_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_V_EVENT_STR-MANDT sy-vline 
WA_V_EVENT_STR-PLOBJ sy-vline 
WA_V_EVENT_STR-STFNA sy-vline 
WA_V_EVENT_STR-ERNMR sy-vline 
WA_V_EVENT_STR-RELDA sy-vline 
WA_V_EVENT_STR-VRSIO sy-vline 
WA_V_EVENT_STR-SSOUR sy-vline 
WA_V_EVENT_STR-RELST sy-vline 
WA_V_EVENT_STR-REVLU sy-vline 
WA_V_EVENT_STR-GSTRU sy-vline 
WA_V_EVENT_STR-RFERE sy-vline 
WA_V_EVENT_STR-ERTYP sy-vline 
WA_V_EVENT_STR-EREST sy-vline 
WA_V_EVENT_STR-PERKZ sy-vline 
WA_V_EVENT_STR-PERIV sy-vline 
WA_V_EVENT_STR-ANZEP sy-vline 
WA_V_EVENT_STR-OPERA sy-vline 
WA_V_EVENT_STR-ERVAL sy-vline 
WA_V_EVENT_STR-DECIM sy-vline 
WA_V_EVENT_STR-EXPON sy-vline 
WA_V_EVENT_STR-ERPOS sy-vline 
WA_V_EVENT_STR-SPRAS sy-vline 
WA_V_EVENT_STR-ERETX sy-vline 
WA_V_EVENT_STR-ETXNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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