PostgreSQL has ltree[0] which does the same thing, but that's not exactly what the OP is talking about. [0] https://www.postgresql.org/docs/current/static/ltre

PostgreSQL has ltree[0] which does the same thing, but that's not exactly what the OP is talking about. [0] https://www.postgresql.org/docs/current/static/ltree.html https://www.postgresql.org/docs/current/static/ltree.html