GitHub - apache/age: Graph database optimized for fast analysis and real-time data processing. It is provided as an extension to PostgreSQL.
The basic principle of the project is to create a single storage that handles both the relational and graph data model so that the users can use the standard ANSI SQL along with openCypher, one of the most popular graph query languages today.
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It provides plenty of robust databases features essential to the database environment, including ACID transactions, multi-version concurrency control (MVCC), stored procedure, triggers, constraints, sophisticated monitoring, and a flexible data model (JSON).