Stream Processor accessing data from other streams

[mp3monster]

It would be very powerful if a stream processor could have a nested query so that it could retrieve the value(s) from another stream as a means to enrich the current stream. It would make it easy to define a means to filter for combined conditions, e.g.

If my CPU usage stream is averaging 90% and within a time range whether the average memory was above a threshold - only then generate a record in the new stream.