出处：

Listing All Events

Most events are numbered in the range 10000 to 10999. To dump all event messages in this range use

    SET SERVEROUTPUT ON
    
    DECLARE 
      err_msg VARCHAR2(120);
    BEGIN
      dbms_output.enable (1000000);
      FOR err_num IN 10000..10999
      LOOP
        err_msg := SQLERRM (-err_num);
        IF err_msg NOT LIKE '%Message '||err_num||' not found%' THEN
          dbms_output.put_line (err_msg);
        END IF;
      END LOOP;
    END;
    /

On Unix systems event messages are in the formatted text file

    $ORACLE_HOME/rdbms/mesg/oraus.msg

To print detailed event messages (Unix only) use the following script

    event=10000
    while [ $event -ne 10999 ]
    do
        event=`expr $event + 1`
        oerr ora $event
    done

Listing Enabled Events

To check which events are enabled in the current session

    SET SERVEROUTPUT ON
    DECLARE
        l_level NUMBER;
    BEGIN
        FOR l_event IN 10000..10999
        LOOP
            dbms_system.read_ev (l_event,l_level);
            IF l_level > 0 THEN
                dbms_output.put_line ('Event '||TO_CHAR (l_event)||
                ' is set at level '||TO_CHAR (l_level));
            END IF;
        END LOOP;
    END;
    /