neo4j

问题 I am trying to write a query which will give me all the nodes which are connected with a "master" node. Lets say that the node connect like this: A -> B B -> C C -> D C -> E B -> F What I want initially is to write a query which will return to me all the node's names under the master node A. All the nodes are related with a "contain" relationship. I wrote this query: MATCH (n {gid:'58749'})-[:contains*]-(z) RETURN z as names When I run this query in the neo4jServer I get a nice graph, which

问题 I'm trying to programmatically locate all duplicate nodes in a Neo4j 1.8 database (using Neo4j 1.8). The nodes that need examination all have a (non-indexed) property externalId for which I want to find duplicates of. This is the Cypher query I've got: START n=node(*), dup=node(*) WHERE HAS(n.externalId) AND HAS(dup.externalId) AND n.externalId=dup.externalId AND ID(n) < ID(dup) RETURN dup There are less than 10K nodes in the data and less than 1K nodes with an externalId . The query above is

问题 Im trying to add relationships to a Neo4j graph I created in parallel using Java's ExecutorService. I'm having two issues. First, is while all my runnables are sumbitted my program jumps forward and closes the Transaction. Second, if I keep the Transaction open (via an infinite before hand so it doesn't close so that problem isn't really solved), when the runnables are being executed they are not able to add the relationships and seem to be stuck on those lines of code. private void createDB(

问题 I have a windows 7 x64 machine. I installed neo4j which went very smoothly. I then managed to install neo4django and neo4j-embedded and that was fine too. However I decided to change the directory it was in, so I stopped the neo4j service in powershell and moved it to a different spot. Since then I haven't been able to restart the service, though if I run the console it starts neo4j in a java.exe window (I think) and thus it works (localhost:7474 accessible, able to run the neo4j-embedded

问题 I am using Neo4j for my project. In my graph DB I have 2 types of nodes: person fruit person nodes may be connected with each other with relation friend person nodes are connected with the nodes of fruits if they like that fruit. I want to find the set of group of 3 people who likes for example apple peach and orange and there is at least the path from one person to 3rd with relation "friend", or all 3 are friends. Since I have started using neo4j just recently, I need Guru's help to come up

问题 I have Jersery Rest service and i am using Neo4j Embedded Database to serve requests with data. Now when i make concurrent GET requests it works fine. But when i make concurrent POST requests It gives Following Exception : Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.StoreLockerLifecycleAdapter@62f1ca5e' was successfully initialized, but failed to start. Please see attached cause exception. at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance

问题 I've been using neo4j 1.9 RC1 for the past two months. Yesterday, after an eclipse crash I started having this this exception: Exception in thread "main" java.lang.RuntimeException: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.transaction.TxManager@bf5743' was successfully initialized, but failed to start. Please see attached cause exception. at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:282) at org.neo4j.kernel

问题 Is is possible to pls advice me how to go about.. doing a Same Entity Relationship.. For ex. Entity(class Person) relatesTo Entity(class Person). CODE: @NodeEntity public class Person { @GraphId @GeneratedValue private Long id; @Indexed(indexType = IndexType.FULLTEXT, indexName = "searchByPersonName") private String personName; @Fetch @RelatedTo(type = "CONNECTS_TO", direction = Direction.BOTH) private Set<ConnectedPersons> connectedPersons; public ConnectedPersons connectsTo(Person endPerson

问题 Requirements: Find out two or more related matching nodes and display them as groups without repeating all possible combination of matches Data structure: E1 is entity 1 N1 is name of entity 1 P1 is phone of entity 1 E2 is entity 2 N2 is name of entity 2 P2 is phone of entity 2 E3 is entity 3 N3 is name of entity 3 P3 is phone of entity 3 Query Used: start e1=node:entities('entityID:90754 OR entityID:113184 OR entityID:29472') match (n1)<-[:HAS_NAME]-(e1)-[:HAS_PHONE]-(p1), (p1)-[m:MATCHES_TO

问题 I'm using the following on Windows 7: neo4j-community-1.9.2 Java 7 Update 25 I have Windows Firewall disabled. When I start Neo4j.bat, both as Administrator and normally, I get the following message: c:\Tools\neo4j\bin>Neo4j.bat 28/07/13 9:34:27 PM org.neo4j.server.AbstractNeoServer INFO: Setting startup tim eout to: 120000ms based on -1 A blank Java console window pops up, no messages, then the window disappears after a minute or so. When I go to http://localhost:7474/ , I just get a server