Hello,
We have a Kafka topic to which we have sending measurements for 3 months. Now we want to display and process the live measurement data together with the historical ones out of the topic.
Is it possible to load this historical measurement data with Streamcheet or can only live data be processed?
Hey phil,
thanks for that question. 
We so far don´t have the possibility to connect KSQL to Streamsheets.
This is on our roadmap for the Enterprise solution, but most likely won´t be a part of the OS.
A possibility to connect it now, would be to set up a Kafka Rest Proxy and query the data via our HTTP connection.
If the enterprise version is of interest to you, let me know.
If needed, we would be able to prioritize this feature more. 
Cheers
Tizian