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Odysseus has some features to measure the latency of single stream elements. This latency information is modeled as an interval. An operator in Odysseus can modify the start point of this interval. This operator sets the endpoint and determines the place in the query plan, where the latency measurement finds place. There can be multiple operators in the plan, to measure latency at different places.

To use this operator you have to set "#METADATA Latency" in the query.




CalcLatency Example
output = CALCLATENCY(input)
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