Hi Sven, I'm using your P3 library https://github.com/svenvc/P3 to connect to TimescaleDB set up like this tutorial... http://docs.timescale.com/v0.8/tutorials/tutorial-hello-nyc but the following doesn't work unless I un-comment the second line... (P3Client new url: 'psql://postgres:password@localhost:5432/nyc_data') in: [ :client | [ " client database: 'nyc_data'. " client query: 'SELECT date_trunc(''day'', pickup_datetime) as day, avg(fare_amount) FROM rides WHERE passenger_count > 1 AND pickup_datetime < ''2016-01-08'' GROUP BY day ORDER BY day;' ] ensure: [ client close ] ]. Is it supposed to work without the second line, just with the database set in the url ? cheers -ben P.S. TimescaleDB looks like cool tech... https://blog.timescale.com/time-series-data-why-and-how-to-use-a-relational-... Some notes for anyone wanting to try tutorial-hello-nyc... a. Postgresql >9.6.3 is required, for which the default install on Ubuntu 16.04 had a problem with libpq not being recent enough. I needed to follow these steps... https://askubuntu.com/questions/831292/how-to-install-postgresql-9-6-on-any-... b. Downloading the sample data errored using the given "https" url, but plain "http" worked... http://timescaledata.blob.core.windows.net/datasets/nyc_data.tar.gz