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There you will see for any installed query, the plan. A click on the operators shows information at the bottom
Including output of each operator
For all registered connections, the sources, sinks and queries can be found under "Streams", "Sinks" and "Queries" resp.
The "Evaluation" entry can be used to evaluate query regarding runtime.
Remark: At the moment, this is browser based only, so for running a evaluation, the browser must be kept open.