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The following example shows some ways to use abstract datatype methods in a SQL script, including:

Attention: You must call the Initialize method before you can perform any further manipulation on a new WF_EVENT_T object.

The example code is from the script wfevtenq.sql, which enqueues an event message on a queue using an override agent. See: Wfevtenq.sql, Oracle Workflow Administrator's Guide.

declare

l_overrideagent varchar2(30) := '&overrideagent';
l_overridesystem varchar2(30) := '&overridesystem';
l_fromagent varchar2(30) := '&fromagent';
l_fromsystem varchar2(30) := '&fromsystem';
l_toagent varchar2(30) := '&toagent';
l_tosystem varchar2(30) := '&tosystem';
l_eventname varchar2(100) := '&eventname';
l_eventkey varchar2(100) := '&eventkey';
l_msg varchar2(200) := '&message';
l_clob clob;
l_overrideagent_t wf_agent_t;
l_toagent_t wf_agent_t;
l_fromagent_t wf_agent_t;
l_event_t wf_event_t;

begin

   /*You must call wf_event_t.initialize before you can manipulate
   a new wf_event_t object.*/

wf_event_t.initialize(l_event_t);

l_overrideagent_t := wf_agent_t(l_overrideagent,
                                    l_overridesystem);
   l_toagent_t := wf_agent_t(l_toagent, l_tosystem);
   l_fromagent_t := wf_agent_t(l_fromagent, l_fromsystem);

if l_msg is null then
      l_event_t.Content(l_eventname, l_eventkey, null);
   else
      dbms_lob.createtemporary(l_clob, FALSE, DBMS_LOB.CALL);
      dbms_lob.write(l_clob, length(l_msg), 1, l_msg);
      l_event_t.Content(l_eventname, l_eventkey, l_clob);
   end if;

l_event_t.Address(l_fromagent_t, l_toagent_t, 50, sysdate);

wf_event.enqueue(l_event_t, l_overrideagent_t);

end;

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