Oracle PGQL
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https://blogs.oracle.com/oraclespatial/property-graph-query-language-pgql-support-has-been-added-to-oracle-database-12201 At a high level, PGQL is a SQL-like declarative language that allows a user to express a graph query pattern that consists of vertices and edges, and constraints on the properties of the vertices and edges. Once this patch is applied to your database instance, you can run the following quick test, Groovy/Java based, to see how it works. cd $ORACLE_HOME/md/property_graph/dal/groovy $ sh ./gremlin-opg-rdbms.sh