Introducing QueryFlux: Multi-Engine Query Router and Universal SQL Proxy

Efficiently routing multiple query engines is a critical challenge. QueryFlux is a universal SQL proxy and multi-engine query router written in Rust. It sits between clients and query engines. Clients connect to QueryFlux using a protocol they already know. QueryFlux routes each query to the right backend, translates SQL dialects when needed, enforces concurrency limits, and gives you a unified observability surface. Open table formats unified the data. QueryFlux unifies the access. If you already run more than one query engine, you know the problem is not only where data lives. The harder part is how query access works in practice. Which engine should this run on? Which client should connect where? How do you protect low-latency traffic from batch workloads? What happens when one cluster is saturated? How much routing logic ends up hardcoded across the stack? That is the problem QueryFlux is built to solve. Why QueryFlux exists Modern data platforms are multi-engine by design. A team