ABAP Select data from SAP table ENHEVENT_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENHEVENT_DATA
*  INTO TABLE @DATA(IT_ENHEVENT_DATA2).
*--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_ENHEVENT_DATA INDEX 1 INTO DATA(WA_ENHEVENT_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENHEVENT_DATA>-EVENTKEY = 1.
<ENHEVENT_DATA>-CLSNAME = 1.
<ENHEVENT_DATA>-CMPNAME = 1.
<ENHEVENT_DATA>-EVENT_HEADER = 1.
<ENHEVENT_DATA>-CLSNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENHEVENT_DATA-CMPNAME, sy-vline,
  WA_ENHEVENT_DATA-VERSION, sy-vline,
  WA_ENHEVENT_DATA-LANGU, sy-vline,
  WA_ENHEVENT_DATA-DESCRIPT, sy-vline,
  WA_ENHEVENT_DATA-ALIAS, sy-vline,
  WA_ENHEVENT_DATA-REDEFIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENHEVENT_DATA 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_ENHEVENT_DATA 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_ENHEVENT_DATA INTO WA_ENHEVENT_DATA.


*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 LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ENHEVENT_DATA-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENHEVENT_DATA-LANGU.
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_ENHEVENT_DATA_STR, 
EVENTKEY TYPE STRING,
CLSNAME TYPE STRING,
CMPNAME TYPE STRING,
EVENT_HEADER TYPE STRING,
CLSNAME TYPE STRING,
CMPNAME TYPE STRING,
VERSION TYPE STRING,
LANGU TYPE STRING,
DESCRIPT TYPE STRING,
ALIAS TYPE STRING,
REDEFIN TYPE STRING,
EXPOSURE TYPE STRING,
STATE TYPE STRING,
EDITORDER TYPE STRING,
AUTHOR TYPE STRING,
CREATEDON TYPE STRING,
CHANGEDBY TYPE STRING,
CHANGEDON TYPE STRING,
EVTDECLTYP TYPE STRING,
REFCLSNAME TYPE STRING,
REFCMPNAME TYPE STRING,
LOCKED TYPE STRING,
R3RELEASE TYPE STRING,
BCEVTCAT TYPE STRING,
ENHANCEMENT TYPE STRING,
DESCRIPT_ID TYPE STRING,
DOCU_ID TYPE STRING,
EVENT_PARAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENHEVENT_DATA_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_ENHEVENT_DATA_STR-EVENTKEY sy-vline 
WA_ENHEVENT_DATA_STR-CLSNAME sy-vline 
WA_ENHEVENT_DATA_STR-CMPNAME sy-vline 
WA_ENHEVENT_DATA_STR-EVENT_HEADER sy-vline 
WA_ENHEVENT_DATA_STR-CLSNAME sy-vline 
WA_ENHEVENT_DATA_STR-CMPNAME sy-vline 
WA_ENHEVENT_DATA_STR-VERSION sy-vline 
WA_ENHEVENT_DATA_STR-LANGU sy-vline 
WA_ENHEVENT_DATA_STR-DESCRIPT sy-vline 
WA_ENHEVENT_DATA_STR-ALIAS sy-vline 
WA_ENHEVENT_DATA_STR-REDEFIN sy-vline 
WA_ENHEVENT_DATA_STR-EXPOSURE sy-vline 
WA_ENHEVENT_DATA_STR-STATE sy-vline 
WA_ENHEVENT_DATA_STR-EDITORDER sy-vline 
WA_ENHEVENT_DATA_STR-AUTHOR sy-vline 
WA_ENHEVENT_DATA_STR-CREATEDON sy-vline 
WA_ENHEVENT_DATA_STR-CHANGEDBY sy-vline 
WA_ENHEVENT_DATA_STR-CHANGEDON sy-vline 
WA_ENHEVENT_DATA_STR-EVTDECLTYP sy-vline 
WA_ENHEVENT_DATA_STR-REFCLSNAME sy-vline 
WA_ENHEVENT_DATA_STR-REFCMPNAME sy-vline 
WA_ENHEVENT_DATA_STR-LOCKED sy-vline 
WA_ENHEVENT_DATA_STR-R3RELEASE sy-vline 
WA_ENHEVENT_DATA_STR-BCEVTCAT sy-vline 
WA_ENHEVENT_DATA_STR-ENHANCEMENT sy-vline 
WA_ENHEVENT_DATA_STR-DESCRIPT_ID sy-vline 
WA_ENHEVENT_DATA_STR-DOCU_ID sy-vline 
WA_ENHEVENT_DATA_STR-EVENT_PARAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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