I uploaded movie and user data to janusgraph and initially I made index on movieId but, later I realised I need to index movie title as well. I need to do query based on movie title and without indexing movie id, it's giving me warning "Query requires iterating over all vertices". So, I added the code:
JanusGraphManagement mgmt = graph.openManagement();
PropertyKey title = mgmt.getPropertyKey("title");
JanusGraphManagement.IndexBuilder movieNameIndexBuilder = mgmt.buildIndex("title", Vertex.class)
.addKey(title);
movieNameIndexBuilder.unique();
JanusGraphIndex movieTitleIndex = movieNameIndexBuilder.buildCompositeIndex();
mgmt.setConsistency(movieTitleIndex, ConsistencyModifier.LOCK);
mgmt.commit();
Still I'm getting the same warning "Query requires iterating over all vertices" when I'm querying on movie title.
Thank you
Got the solution from Janusgraph gitter channel:
The index isn't available immediately if the the indexed property key was created in a previous management transaction as JanusGraph might need to reindex existing data now. That is a process you have to trigger manually. You can read more about this in the chapter Index Management of the docs. That is why it's recommended to create all indices in the same transaction where you create the property keys if possible