Imagine if you could skip packing your bags for a trip because you find out at the airport you’re not going. That’s what ClickHouse is doing with data now. ClickHouse is one of the fastest analytical databases available, and much of that speed comes from avoiding unnecessary work. The less data it scans and processes, the faster queries run. Now it pushes this idea even further with a new optimization: lazy materialization, which delays reading column data until it’s actually needed. This seemin...