gremlin> graph.tx().rollback()

==>null

gremlin> mgmt = graph.openManagement()

==>org.janusgraph.graphdb.database.management.ManagementSystem@6843fdc4

gremlin> personid = mgmt.getPropertyKey('personid')

==>personid

gremlin> mgmt.buildIndex('personid', Vertex.class).addKey(personid).unique().buildCompositeIndex()

==>personid

gremlin> mgmt.commit()

==>null

Then I do a query like so, and it gives me a warning that I should use indexes.  Isn't the index use not implicit?  Do I have to do anything specific for it to use the index I just created?

gremlin> g.V().has('personid','640').out('role').inE('role').has('roletype',eq("director")).outV().values('personid')

13:14:45 WARN  org.janusgraph.graphdb.transaction.StandardJanusGraphTx  - Query requires iterating over all vertices [(personid = 640)]. For better performance, use indexes

==>7735