Clojurians Log v2

Not sure if this is interesting to you. About 3 years back I was part of the Oracle PGX team, I wasn't directly involved in graph database development, I was more on the analytics side. But they had quite impressive performance characteristics. https://docs.oracle.com/cd/E56133_01/latest/get-pgx.html

I never got to use it myself. I recall people talking about Oracle’s first attempt, which was apparently a thin layer over the standard RDMBS, and they weren’t fans of it. But that was back around 2008/2009 IIRC. We did have a couple of Oracle people on the SPARQL working group: Souripriya Das and Matthew Perry. So it was clear that Oracle had made a commitment there