To raise a database event, use the RAISE DBEVENT statement:

The RAISE DBEVENT statement can be issued from interactive or embedded SQL applications, or from within a database procedure, including procedures that execute as the result of a rule firing. When the RAISE DBEVENT statement is issued, the DBMS Server sends a database event message to all applications that are registered to receive event_name. If no applications are registered to receive a database event, raising the database event has no effect.

A session can raise any database event that is owned by the effective user of the session, and any database event owned by another user who has granted the raise privilege to the effective user, group, role, or public.

The optional event_text parameter is a string (maximum 256 characters) that can be used to pass information to receiving applications. For example, you can use event_text to pass the name of the application that raised the database event, or to pass diagnostic information.

The [NO]SHARE parameter specifies whether the DBMS Server issues database event messages to all applications registered for the database event, or only to the application that raised the database event (or, if the database event was raised as the result of a rule firing, issued the query that raised the database event). If SHARE is specified or omitted, the DBMS Server notifies all registered applications when the database event is raised. If NOSHARE is specified, the DBMS Server notifies only the application that issued the query that raised the database event (assuming the program was also registered to receive the database event).

If a transaction issues the RAISE DBEVENT statement, and the transaction is subsequently rolled back, database event queues are not affected by the rollback: the raised database event remains queued to all sessions that registered for the database event.