ClickHouse Embraces Rust: A Challenging Integration Journey

ClickHouse, originally written in C++, embarked on a journey to integrate Rust to attract more developers and expand its capabilities. The article details this process, from initially choosing the BLAKE3 hash function as a pilot project, to integrating the PRQL query language and the Delta Lake library. The journey encountered numerous challenges, including build system integration, memory management, error handling, and cross-compilation issues. Despite problems like bugs in Rust libraries, excessively large symbol names, and interoperability issues with C++ code, the ClickHouse team overcame these obstacles, successfully integrating Rust into the project and paving the way for future development.