neo4j

If anything breaks at number like 33, it means that there was a restriction upto 32, why 32? 2^5. It’s not trivial that most of the restrictions are in a factor of 2, MongoDB document size cannot be more than 16 MB, on a collection there could be maximum index, no more than 64. etc. … Read more

You may also want to try a cypher query such as: START n=node(*) RETURN n; It’s very obvious, and it will return all the existing nodes in the database. EDIT : the following displays the nodes and the relationships : START n=node(*) MATCH (n)-[r]->(m) RETURN n,r,m;

In Neo4j 2.0 you can create schema indexes for your labels and the properties you use for lookup: CREATE INDEX ON :User(username) CREATE INDEX ON :Role(name) To create relationships you might use: MATCH (u:User {username:’admin’}), (r:Role {name:’ROLE_WEB_USER’}) CREATE (u)-[:HAS_ROLE]->(r) The MATCH will use an index if possible. If there is no index, it will lookup … Read more

So, this gives you all nodes: MATCH (n) RETURN n; If you want to delete everything from a graph, you can do something like this: MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE n, r; Updated for 2.0+ Edit: Now in 2.3 they have DETACH DELETE, so you can do something like: MATCH (n) DETACH DELETE n;