DuckDB Table Functions in Java

In a large organization, data is spread across many systems, including relational databases, document stores, message queues, data lakes, and cloud data warehouses. Some of these systems can be reached only through a vendor SDK, usually provided in Java, or a SOAP endpoint, and many sit behind custom authentication or single sign-on that is awkward to satisfy from anything but a JVM client. The layer that ties these together is often a JVM-based distributed query engine, such as Trino , that can run a single query joining across multiple data sources.