How to Identify the current step in execution

Hi,
My merge query takes a long time to run. I monitored the session and it was doing a full table scan and it registered as a long-operation. Now thats finished and it goes off to do whatever else it needs to do.
How do I know whats its executing at any given point in time? I want to know what it scans / writes next and what object its scanning. In other words, I want to know which step of the execution plan is it currently executing.
Is there a way of identifying this? Any V$ views which provide this information?
Thanks in advance,
K

Will tracing the session tell me where it is
currently?Tracing the session generates a file on disk with all the various waits in it. Generally, you would analyze that trace file at the end of the process to see where the time was spent. In theory, I suppose that it may be possible to watch that trace file and deduce what step the query was on. It's far from obvious to me, though, that this would be particularly practical-- the trace file grows pretty quickly and isn't particularly trivial to read, particularly in real time.
Justin

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