[Blueprints] Neo4j query capabilities with Blueprints Index

[Marko Rodriguez]

Hi,

A fellow emailed me privately asking me if Blueprints supported Lucene querying over Neo4j.

I said: "No. Neo4jIndex uses index.get(), not index.query()." Then I said: "I shall rectify this."

So I did. Its a bit of a hack, but I think its nice.

Check it:
http://paste.pocoo.org/show/334747/
(NOTE: I'm using full Java notation so its apparent what to do if you are in Blueprints -- not Gremlin).

In short, if you append Neo4jTokens.QUERY_HEADER to your value in a Neo4jIndex.get() call, it will know that you want to do a Lucene-style query. Right now, Neo4jTokens.QUERY_HEADER == "%query%" (WARNING: may change, use Neo4jTokens.QUERY_HEADER to be safe).

Its a hack.... any other ideas are more than welcome. ???

I've committed the code to GitHub and updated Blueprints 0.5-SNAPSHOT in the TinkerPop Maven2 repository with the latest deployment.

LUCA: Does OrientDB support such text searching? Should we add this too OrientGraph?

Thoughts?,
Marko.

http://markorodriguez.com

[Luca Garulli]

Hi Marko,

yes OrientDB has similar feature but it's not Lucene under the hood. Could you leave it just as a String?

Lvc@

[Marko Rodriguez]

Hi,

Its simply a String for Neo4j.

graph.getIndex(Index.VERTICES, Vertex.class).get("name", Neo4jTokens.QUERY_HEADER + "*rko")

graph.getIndex(Index.EDGES, Edge.class).get("label", Neo4jTokens.QUERY_HEADER + "k?ows")

graph.getIndex(Index.EDGES, Edge.class).get("weight", Neo4jTokens.QUERY_HEADER + "[0.5 TO 1.0]")

In OrientGraph, does this already exist or is there something special that needs to be done? Meaning, if I do:

OrientIndex.get("name", "*STAR") will that work as is right now? Or do we need to do some sort of OrientTokens.QUERY_HEADER model too?

Thanks,

Marko.

http://markorodriguez.com

[James Thornton]

Any way yet to do this from rexster?

[Marko Rodriguez]

Hi,

> Any way yet to do this from rexster?

Do you mean Lucene wildcards?

Do: key=name&value=%25query%25ma*
-> marko
-> mattias
-> mat
etc.

Marko.

http://markorodriguez.com

[Pierre De Wilde]

http://localhost:8182/tinkergraph/indices/vertices?key=name&value=%25query%25ma*

=> {"version":"0.3-SNAPSHOT","results":[],"total_size":0,"query_time":0.772096}

?

2011/4/16 Marko Rodriguez <okram...@gmail.com>

[Marko Rodriguez]

Sorry -- only works for Neo4jGraph. Its a "hack" to allow people to use Lucene aspects of Neo4j.

Marko.