neo4j

问题 I have my DB_Path String DB_PATH = "path/to/data/graph.db" then I am running GraphDatabaseService graphDb = new EmbeddedGraphDatabase(DB_PATH) In which I am met with (full exception) Exception in thread "main" java.lang.RuntimeException: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.transaction.XaDataSourceManager@10f102d3' was successfully initialized, but failed to start. Please see attached cause exception. at org.neo4j.kernel.InternalAbstractGraphDatabase

问题 I have this Cypher query: MATCH (i:Issue {name:"SN-229"})-[d:ON_DATE]->(s:Stage) RETURN i,(MAX(d.long)-MIN(d.long)+1) AS Days,s and I get these results in the Neo4j Browser's Text view Which are the answers I want. But when I view the result in the Neo4j Browser's Graph view, it insists on displaying the individual dates in the relationships!?!? What query could I write to show me this "ideal" Graph view (the displayed dates are the MIN(d.long) dates) or at least just display the relationship

问题 In my Neo4j database I have a following entities: @NodeEntity public class Product { private final static String CONTAINS = "CONTAINS"; private final static String DEFINED_BY = "DEFINED_BY"; private final static String VOTED_FOR = "VOTED_FOR"; private final static String PARENT = "PARENT"; private final static String CREATED_BY = "CREATED_BY"; @GraphId private Long id; @RelatedTo(type = PARENT, direction = Direction.INCOMING) private Product parent; @RelatedTo(type = CONTAINS, direction =

问题 I have a CSV file with data like: ID,Name,Role,Project 1,James,Owner,TST 2,Ed,Assistant,TST 3,Jack,Manager,TST and want to create people whose relationships to the project are therein specified. I attempted to do it like this: load csv from 'file:/../x.csv' as line match (p:Project {code: line[3]}) create (n:Individual {name: line[1]})-[r:line[2]]->(p); but it barfs with: Invalid input '[': expected an identifier character, whitespace, '|', a length specification, a property map or ']' (line

问题 I have a setup like the attached image. Orange nodes denotes the cases and the Blue nodes denotes the Performers of various activities within that case. I would like to query each case in turn. Within each case, I need to add relationship [:RELATED {value: 1}] from node i to node k , for all k that lies in between(nodes whose ID fall between i and j) those pair of Performer nodes ( node i , node j ) such that : Name(node i ) == Name( node j ) and | ID(node i ) - ID(node j ) | >= 2 [Example

问题 I'm need run queries with 1000 objects. Using /batch endpoint I can get this to work but is too slow (30 seconds with 300 items). So I'm trying the same approach as said in this docs page: http://docs.neo4j.org/chunked/2.0.1/rest-api-cypher.html#rest-api-create-mutiple-nodes-with-properties POST this JSON to http://localhost:7474/db/data/cypher { "params": { "props": [ { "_user_id": "177032492760", "_user_name": "John" }, { "_user_id": "177032492760", "_user_name": "Mike" }, { "_user_id":

问题 I'd like to set a query timeout in neo4j.conf for Neo4j 3.0.1. Any query taking longer than the timeout should get killed. I'm primarily concerned with setting the timeout for queries originating from the Neo4j Browser. It looks like this was possible in the past with: execution_guard_enabled=true org.neo4j.server.webserver.limit.executiontime=20000 However, this old method doesn't work for me. I see Neo4j 3.0 has a dbms.transaction_timeout option defined as a "timeout for idle transactions".

问题 When the neo4j lucene auto index is in exact mode (which is the default) queries of the type: start n=node:node_auto_index('name:asfd\\ a*') return n Work correctly (assuming you have a node with the name asdf adsf for instance. However when switching the index to "fulltext" mode following these instructions (including deleting the index and reassigning the indexed property), then the same query doesn't return any results. Original Question Trying to search neo4j via the full text index when

问题 I'm having a hard time collecting data from two distinct sources and merge the collections so that the final one is a set of objects ordered by 'dateCreated'. Context Users can ask questions in groups. A question can be either general or related to a specific video-game. If the question asked in a group is video-game related, this question also appears in the video-game's questions page. Currently, I have two general questions and one specific to one video-game. Hence, when fetching the

问题 Let's assume a graph dealing with cars. Each Car can evolve over time, and I need to keep track of those changes. (in order to be able to track some inconsistency of evolution etc...) I thought about implementing a copy-on-write mechanism (like LinkedIn seems to do), meaning creating a complete new Car node each time one of the Car 's properties changes. I would end up with a graph like this: (Ferrari)-[:CURRENT]->(V3)-[:PREVIOUS]->(V2)-[:PREVIOUS]->(V1) I'm specifically interested in