Sqlg is a tinkerpop 3 implementation on top of a rdbms.
'org.umlg:sqlg-benchmark-postgres:1.1.0.RC1'
<dependency>
<groupId>org.umlg</groupId>
<artifactId>sqlg-benchmark-postgres</artifactId>
<version>1.1.0.RC1</version>
</dependency>
<dependency org="org.umlg" name="sqlg-benchmark-postgres" rev="1.1.0.RC1"/>
"org.umlg", "sqlg-benchmark-postgres", "1.1.0.RC1"