I’m dubious, Postgres added OO features when that was the fashion, then XML, then JSON. To my mind Graphs are still relations just indirect one, I use graphs a

I’m dubious, Postgres added OO features when that was the fashion, then XML, then JSON. To my mind Graphs are still relations just indirect one, I use graphs a lot within Postgres no problem, it has native recursive CTEs which are surprisingly fast for most Graph queries. For v large graphs I cache the graph with an automatically generated transitive closure table or mat view. With Postgres you can do union distinct inside the Recursive CTE to prevent cycles and it’s remarkably fast, millions of rows under 1 minute.