DuckDB 2.0.0 LTS Released With Client-Server Quack Protocol and Async I/O

DuckDB 2.0.0 LTS, codenamed Cinnamon Teal, was released on 21 October 2026 as an open-source analytical database that runs inside a single process. The release, built from close to 20,000 commits since DuckDB 1.5, adds the Quack protocol, asynchronous I/O, a native VARIANT type, agent mode, triggers, and an extensible SQL parser. The project describes it as its largest feature release to date, with 2.0 supported until at least October 2027. Older version lines continue receiving support for a limited period, and storage format changes mean releases before 2.0 cannot open files written by 2.0.
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