MariaDB Server
A widely deployed open-source relational database, forked from MySQL, that adds native vector search, pluggable storage engines, and synchronous clustering while staying compatible with MySQL applications.
MariaDB Server is a relational database that began as a fork of MySQL, led by the original MySQL developers, and maintains a high degree of MySQL compatibility while adding its own capabilities. These include a built-in VECTOR data type with approximate nearest-neighbor indexing for vector search, pluggable storage engines such as InnoDB, Aria, MyRocks, ColumnStore for analytics, and Spider for sharding, and both asynchronous and Galera synchronous multi-primary replication.
It supports common table expressions and window functions, system-versioned temporal tables, JSON functions, an Oracle SQL compatibility mode with PL/SQL-style stored routines, and spatial and full-text search. Security features include role-based access control, pluggable authentication, encryption at rest, and TLS.
It follows a yearly long-term-support release alongside quarterly rolling releases, is written in C++, and is released under the GPL-2.0 license.