[prrao87]

lance-graph 0.5.2 now supports referencing the same variables in a given Cypher query (see lance-format/lance-graph#128). This means that Q30 now can now be run!

With the following query pattern applied for all 4 tools tested, lance-graph is the fastest graph system out there for Q30! 🎉

MATCH (c:Comment)-[:commentHasCreator]->(creator:Person),
             (c)-[:replyOfPost]->(post:Post)-[:postHasCreator]->(creator)
RETURN COUNT(DISTINCT c.ID) AS has_self_reply

Note that the query has to be written with the above, split pattern for lance-graph to choose the right query plan. More query optimizations are possible at a later stage, but for now, writing the queries this way unlocks huge gains.

Query	neo4j-2025.12.1 (ms)	kuzu-0.11.3 (ms)	ladybug-0.14.1 (ms)	lance-graph-0.5.2 (ms)
q30	1255.2ms	158.7ms (7.9x)	154.4ms (8.1x)	31.3ms (40.1x)