I'm currently working on my dissertation, exploring how SIMD-optimized index data structures can enhance performance in column-oriented databases, specifically targeting analytical workloads. During my research, DuckDB stood out due to its impressive performance and suitability for analytical queries. I want to use DuckDB to implement and benchmark my proposed solutions. I would like to know if it is feasible to implement custom indexes within DuckDB. I've read about DuckDB's custom extensions, but I'm unsure if they could be used to this effect. The help of people already experinced with this technology would be great to help me direct my focus. Thanks in advance for your help!