CODEWITHSUNDEEP
graph-databasesgremlintitan
Joan
Joan

Reputation: 4300

GraphOfTheGodsFactory and Gremlin query

I'm trying the queries given here in java:

import static com.tinkerpop.blueprints.Compare

Graph g = GraphOfTheGodsFactory.create("gods")
g.query().has("age", GREATER_THAN, 1000).vertices().iterator().hasNext

But this seems to return false although that the below one return true but doesn't take benefits of the index:

new GremlinPipeline(g.getVertices()).has("age", GREATER_THAN, 1000).toList().size() > 0

Does the example 5 here works for someone ?

Here is a project I created to test: https://github.com/joan38/TestTitan This should print the names of Gods who has more than 1000 years old, but it doesn't.

I really fell that TinkerPop or Titan is not straight forward :( or maybe it's me.

Cheers

Upvotes: 0

Views: 315

Answers (2)

Daniel Kuppitz
Daniel Kuppitz

Reputation: 10904

That's an ElasticSearch pitfall. The problem is that your code simply runs too fast. The default refresh interval of ES is 1 second. I'm not aware of any method to configure this interval when using embedded ES, so all you can do is: add a Thread.sleep(1000) between the code to load the graph and the code to query the data.

Upvotes: 1

stephen mallette
stephen mallette

Reputation: 46216

Not sure why it is not returning true for you. See my Titan Console session:

gremlin> g = GraphOfTheGodsFactory.create("gods")
==>titangraph[local:gods]
gremlin> g.query().has("age", GREATER_THAN, 1000).vertices().iterator().hasNext()
==>true

To go a step further:

gremlin> g.query().has("age", GREATER_THAN, 1000).vertices()
==>v[20]
==>v[4]
==>v[16]
==>v[32]
gremlin> g.query().has("age", GREATER_THAN, 1000).vertices()._().age
==>4500
==>10000
==>5000
==>4000
gremlin> g.query().has("age", GREATER_THAN, 1000).has('name','saturn').vertices()._().map
==>{name=saturn, type=titan, age=10000}
gremlin> new GremlinPipeline(g.getVertices()).has("age", GREATER_THAN, 1000).toList().size()
==>4

Perhaps try it out in the Titan Console and make sure that works for you as it did for me here.

Upvotes: 0

Related Questions