Philipp Kraus schrieb am 19.04.2018 um 16:53:
> I’m using in a project Postgresql and PostGIS for a geospatial data
> model, but now I need also a graph in this structure, so my question
> is, is there any existing extension for Postgres to build a graph. I
> found ltree but this is for tree structures only, not for graphs. In
> general I have different undirected weighted graphs. So I need some
> routing algorithms based on the graph weights, distance calculation
> between nodes. My first idea was to use a graph database e.g neo4j,
> but I have got a limitation, that the whole system should be designed
> in Postgres.
> Did you can give some ideas to build a graph within Postgres?
There is a Postgres fork that claims to combine the graph and relational world
http://bitnine.net/agensgraph