[georgewfraser]

As described in that paper, it’s not sufficient to simply store a second, columnar projection of the data to get good performance. You also need a block-oriented execution engine, which means you effectively have two separate databases operating side-by-side. This is a huge challenge and it’s not clear if it’s really worth it, since for logistical reasons you will nearly always operate a separate data warehouse doing mostly OLAP and production database doing mostly OLTP.