Hello graphistas, Today we’re releasing the fifth and final milestone in our 1.4 “Kiruna Stol” family. We’ve expanded our feature set to include Auto Indexing and paged traversers for the REST API, the Cypher query language has seen some major improvements and as always, we’ve squeezed more performance out of our database engine.
Auto indexing ------------------ In this milestone we have included an improved version of the auto indexing functionality that was announced shortly after 1.4.M04 and has been available in development snapshots since then. You’ll now find new configuration options for separately enabling auto indexing for node and relationship properties and for defining which properties will be indexed. For example, if you want to auto-index all node properties called “name” and all relationship properties called “since” the proper configuration is: Map<String, String> config = new HashMap<String, String>(); config.put(Config.NODE_AUTO_INDEXING, “true”); config.put(Config.NODE_KEYS_INDEXABLE, “name”); config.put(Config.RELATIONSHIP_AUTO_INDEXING, “true”); config.put(Config.RELATIONSHIP_KEYS_INDEXABLE, “since”); Passing the above to the GraphDatabaseService constructor will enable auto indexing for matching nodes and relationships, and on every commit the auto index will be updated automatically. For more details, check out the javadocs and the examples in the manual available at: http://docs.neo4j.org/chunked/1.4.M05/auto-indexing.html Paged REST Traversers -------------------------------- After including batch operations in the previous milestone, now we also provide the option to page results of traversals via a special URI contained in Node representations and that is similar to the existing Traverser REST API. You can define the page size and lease time, having this way finer control the retrieval of traverser results from the client (and also help improve performance on the server). Cypher improvements ----------------------------- The newly introduced Cypher query language is growing more sophisticated and in this milestone we’ve added aggregates, ordering and limits. This allows for more expressive queries, making the following a valid statement against the cineasts database: START user=(User,login,'micha') MATCH (user)-[:FRIEND]-(friend)-[r,:RATED]->(movie) RETURN movie.title, AVG(r.stars), COUNT(*) ORDER BY AVG(r.stars) DESC, COUNT(*) DESC limit 7 To see Cypher in action, check out the screencast<http://neo4j.vidcaster.com/U2Y/introduction-to-cypher/>by our own Michael Hunger. Almost there ---------------- Of course that is not all. As always, we have bug fixes, performance improvements and usability enhancements, the most prevalent of which is the removal of YAJSW as the wrapper and service installer, which should bring joy to the mac users among us. With the GA release to follow shortly, we’d like you to download, try out and provide us with your valuable feedback on these new features so that we can deliver the best possible 1.4 to you, our community. For more details and links go to the release announcement here<http://blog.neo4j.org/2011/06/neo4j-14-m05-kiruna-stol-midsummer.html> . Andrés Taylor _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
