GQL and Graph Algorithms for DuckDB

• From: Stefania Song | Date: Fri, 24 Jul 2026 18:11:53 +0000 #
  Subject: GQL and Graph Algorithms for DuckDB

  First DuckPGQ and now DuckGQL. DuckGQL is an extension for DuckDB that adds support for the ISO Graph Query Language (GQL), enabling graph queries and algorithms directly on data stored in DuckDB. It lets users analyze relationships and connected data using graph patterns without moving their data to a separate graph database, combining relational and graph analytics in a single embedded engine. Try it out in the playground: https://duckgql.com/ Git repo: https://github.com/rahul-iyer/duckdb-gql What's interesting is that this extension supports Graph Algorithms using the GQL CALL clause:

  CALL algo.pagerank(
      'air_routes',
      damping := 0.85,
      max_iterations := 100,
      tolerance := 1e-8
  )
  YIELD vertex_id, rank
  RETURN vertex_id, rank
  ORDER BY rank DESC
  LIMIT 10;

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  • |-- Reply
    From: Stefania Song | Date: Fri, 24 Jul 2026 21:36:39 +0000 #

    DuckGQL aims to integrate an expanding subset of the ISO Graph Query Language (GQL) standard into DuckDB, enabling developers to query, modify, and analyze property graphs without requiring a separate graph database system. The project currently provides support for the following features:

    • Standalone GQL parsing and execution
    • Property graph creation and management
    • Core graph query capabilities, including MATCH, filtering, aggregation, and bounded path traversal
    • Graph mutation operations through INSERT, SET, and DELETE
    • Fundamental graph algorithms, including Breadth-First Search (BFS), PageRank, Weakly Connected Components (WCC), and Strongly Connected Components (SCC)
    • Transaction management and query plan inspection through EXPLAIN support

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