In this post, I will introduce scalar subqueries, explain what challenges we faced extending this feature in CrateDB, and then show you how we addressed those challenges.
CrateDB now supports non-collapsable subselects. Let us introduce you to the problem, and show you the steps Crate.io took to solve it.
The past couple of weeks my team and I have spent some time overhauling the execution pipeline. In this post, I’ll briefly introduce you to the problem we were trying to solve, and how we went about solving it.