Cypher query in Neoclipse cannot find nodes - neo4j

I installed "neo4j-community-1.9-windows" and "neoclipse-1.9.1-win32.win32.x86_64" on one Win2008 R2 server. The Neo4j graph database files are located at "E:\neo4j_home" directory
E:\neo4j_home\bin
E:\neo4j_home\config
E:\neo4j_home\data
......
E:\neo4j_home\system
The graph database are running fine. I can see the nodes and the relationships at http://localhose:7474/, for example, I can see node 100 with http://localhost:7474/webadmin/#/data/search/100/
In Neoclipse, I set the conncetion URI to E:\neo4j_home\data or E:/neo4j_home/data and click "start/connect database" menu. The connection shows green. But when I do Cypher query in Neoclipse, it cannot find any nodes except node(0). For example:start n=node(100) return n; will get error: org.neo4j.cypher.EntityNotFoundException:Node 100 not found
Did I set wrong conncetion URI?


AFAIK the data URL should be E:\neo4j_home\data\graph.db instead of E:\neo4j_home\data.

Related

neo4j_ something went wrong "RangeError. invalid string length" and the application cannot recover

I use neo4j desktop in linux (ubuntu 20.04) when i loaded the csv file in huge size (44 megabyte) appear this error:
something went wrong "RangeError. invalid string length" and the application cannot recover as seen in this pecture:
The Used Code:
LOAD CSV WITH HEADERS FROM 'file:///Email-EuAll.csv' as line
WITH toInteger(line.source) AS Source, toInteger(line.destination) AS Destination
MERGE (a:person {name:Source})
MERGE (b:person {name:Destination})
MERGE (a)-[:Freind ]-(b)
RETURN *

Can you share your statement?
It could also be that you tried to return too much data to neo4j browser? Just return nothing or count(*)
You can also try to run your statement in cypher-shell to see if it works there and narrow down the issue.

Is there a Way to get Neo4j APOC connection strings to accept spaces or \ characters?

I'm working on attempting to pull process data from OSI PI JDBC into my knowledge graph in Neo4j with the APOC library. Having trouble getting the authentication setup:
With the following CYPHER query I get the error Illegal character in path at index 48 (space between Integrated Security)
CALL apoc.load.jdbc("jdbc:pioledbent://[server]/DataSource=[server];Integrated Security=SSPI;","[AF Database].Asset.Element")
YIELD row
RETURN row.Name;
With this CYPHER query I am able get the JDBC driver to prompt for authentication but it always fails saying Invalid Credentials. Username must be non-empty.
CALL apoc.load.jdbc("jdbc:pioledbent://[server]/DataSource=[Server];DCA=file.dca;ProtocolOrder=https/Soap:5461,NetTcp:5462;","[AF Database].Asset.Element")
YIELD row
RETURN row.Name;
Does anyone know if APOC can accept spaces in the connection string so I can get the Integrated Security=SSPI query working?

Neo4j / Cypher: Is CREATE UNIQUE deprecated?

When I write a simple Cypher query like this:
MATCH (r:Person {name:'Jon'})
MATCH (s:Person {name:'Ana'})
CREATE UNIQUE (r)-[:FRIEND_OF]->(s)
I'm receiving an alert messsage in the Neo4j browser. The alert message says:
The RULE planner is not available in the current CYPHER version, the
query has been run by an older CYPHER version. CREATE UNIQUE is
unsupported for current CYPHER version, the query has been execute by
an older CYPHER version
Here a print screen of the alert message:
I searched by this message in the Neo4j Github and did not find anything. Also the docs has no mention to any depreciation.
My question is: Is CREATE UNIQUE deprecated? Why?
I'm using Neo4j 3.2.1.
Thanks.
PS: I know my query can be refactoring. It is only an example. Also all refactoring made in the query using CREATE UNINQUE show the same alert message in the Neo4j browser.

CREATE UNIQUE is set to be completely replaced by MERGE. So your syntax would be :
MATCH (r:Person {name:'Jon'})
MATCH (s:Person {name:'Ana'})
MERGE (r)-[:FRIEND_OF]->(s)
Regards,
Tom

Try this
MATCH (lft:Person {name:'Jon'}),(rgt)
WHERE rgt.name IN ['Ana']
CREATE UNIQUE (lft)-[r:KNOWS]->(rgt)
RETURN r
note that you can search for multiple names too like this
MATCH (lft:Person {name:'Jon'}),(rgt)
WHERE rgt.name IN ['Ana','Maria']
CREATE UNIQUE (lft)-[r:KNOWS]->(rgt)
RETURN r

Neo4j filtering Cypher query on relationships

I am trying to retrieve the paths from Airport(A1) to Airport(A3) based on their relationships, when the arrival-time is less than departure-time.
here is my console link http://console.neo4j.org/r/7cw8h0

You had it almost right (you also misspelt your property value for Airport A1)
MATCH path =((A1:AIRPORT)-[Connections:Connect*]->(A3:AIRPORT))
WHERE A1.name='Airport A1' AND A3.name='Airport A3'
AND ALL (i IN Range(0, length(Connections)-2)
WHERE ((Connections[i]).arrvTime <(Connections[i+1]).dptrTime))
RETURN extract(Connect IN Connections | Connect.flightcode)
Your console was also not shared correctly, here is a correct version:
http://console.neo4j.org/r/jfxnsj
This might also be interesting for you:
http://maxdemarzi.com/?s=flights
http://gist.neo4j.org/?6619085

Neo4j Cypher query fails and return with an Unknown Error

I'm trying to build a Cypher query to test if a specific structure exists so I can relate dates to it.
Running Neo4j 2.1.0-M01 on a Linux server, but the same issue occurred with Neo4j 2.0.1
We're starting with a clean database, 0 nodes.
First I'm running this MATCH query to prove that it runs.
Obviously this query is not going to return any nodes. But after creating the nodes, it will
fail with an 'unknown error'.
It seems like a bug to me, since a query with fewer nodes will return. Does anyone have suggestions how to rewrite this query for now?
Sorry for the large amount of code in this post.
Thanks,
-Edwin
Cypher Query:
MATCH (c:Cluster{cluster_name:'mycluster',cluster_uuid:'7bd4f66d-5faf-11db-8d0d-000e0cba569c'})
,(sc1:Controller{serialnumber:'7000610071',system_id:'1873784171',hostname:'node01',node_uuid:'7cd70205-66ae-11e0-a4a9-0deba859517d'})
,(sc1)-[:IS_PART_OF_CLUSTER]->(c)
,(sc2:Controller{serialnumber:'7000606111',system_id:'1873778118',hostname:'node02',node_uuid:'b954f0a1-6682-11e0-b8a0-517da924923d'})
,(sc2)-[:IS_PART_OF_CLUSTER]->(c)
,(sc3:Controller{serialnumber:'7000561878',system_id:'1873772083',hostname:'node03',node_uuid:'ac293586-6690-11e0-b8a0-517da924923d'})
,(sc3)-[:IS_PART_OF_CLUSTER]->(c)
,(sc4:Controller{serialnumber:'800000075807',system_id:'1873784143',hostname:'node04',node_uuid:'e8d6c7e5-663e-11e0-b8a0-517da924923d'})
,(sc4)-[:IS_PART_OF_CLUSTER]->(c)
,(sc5:Controller{serialnumber:'7000477261',system_id:'1873745662',hostname:'node05',node_uuid:'1d1ecc64-728c-11e0-bf0e-3d25383f7ed3'})
,(sc5)-[:IS_PART_OF_CLUSTER]->(c)
,(sc6:Controller{serialnumber:'7000477273',system_id:'1873745654',hostname:'node06',node_uuid:'140fb0f9-728c-11e0-afeb-49fcf0b6e6c3'})
,(sc6)-[:IS_PART_OF_CLUSTER]->(c)
,(sc7:Controller{serialnumber:'7000474908',system_id:'1873745665',hostname:'node07',node_uuid:'edbf9c62-728b-11e0-bf0e-3d25383f7ed3'})
,(sc7)-[:IS_PART_OF_CLUSTER]->(c)
,(sc8:Controller{serialnumber:'7000474910',system_id:'1873745695',hostname:'node08',node_uuid:'20dbfe67-7832-11e0-afeb-49fcf0b6e6c3'})
,(sc8)-[:IS_PART_OF_CLUSTER]->(c)
,(sc9:Controller{serialnumber:'7000609864',system_id:'1873802756',hostname:'node09',node_uuid:'a8b75397-6690-11e0-b8a0-517da924923d'})
,(sc9)-[:IS_PART_OF_CLUSTER]->(c)
,(sc10:Controller{serialnumber:'7000610021',system_id:'1873791030',hostname:'node10',node_uuid:'f6cf0705-6670-11e0-b8a0-517da924923d'})
,(sc10)-[:IS_PART_OF_CLUSTER]->(c)
,(sc11:Controller{serialnumber:'7000610057',system_id:'1873784128',hostname:'node11',node_uuid:'551b1bf8-663d-11e0-b8a0-517da924923d'})
,(sc11)-[:IS_PART_OF_CLUSTER]->(c)
,(sc12:Controller{serialnumber:'7000609981',system_id:'1873778164',hostname:'node12',node_uuid:'f6062d6c-663e-11e0-9b53-cd0ece6aa2ce'})
,(sc12)-[:IS_PART_OF_CLUSTER]->(c)
,(sc13:Controller{serialnumber:'7000610033',system_id:'1873778186',hostname:'node13',node_uuid:'ed0e61c5-6670-11e0-b07f-933da0385fdc'})
,(sc13)-[:IS_PART_OF_CLUSTER]->(c)
,(sc14:Controller{serialnumber:'7000610069',system_id:'1873784175',hostname:'node14',node_uuid:'8623ea28-66ae-11e0-ab9d-5fdc7f30dee7'})
,(sc14)-[:IS_PART_OF_CLUSTER]->(c)
,(sc15:Controller{serialnumber:'7000606109',system_id:'1873778197',hostname:'node15',node_uuid:'b4349a83-6682-11e0-ab9d-5fdc7f30dee7'})
,(sc15)-[:IS_PART_OF_CLUSTER]->(c)
,(sc16:Controller{serialnumber:'7000610045',system_id:'1873784157',hostname:'node16',node_uuid:'67d80db8-663d-11e0-9b53-cd0ece6aa2ce'})
,(sc16)-[:IS_PART_OF_CLUSTER]->(c)
,(sc17:Controller{serialnumber:'7001246085',system_id:'2014175904',hostname:'node19',node_uuid:'1c792588-ff4e-11db-94fe-3b91dd7dd242'})
,(sc17)-[:IS_PART_OF_CLUSTER]->(c)
,(sc18:Controller{serialnumber:'7001246097',system_id:'2014176797',hostname:'node20',node_uuid:'3ae9e7ae-ff44-11db-864d-af2af862bba3'})
,(sc18)-[:IS_PART_OF_CLUSTER]->(c)
RETURN c,sc1,sc2,sc3,sc4,sc5,sc6,sc7,sc8,sc9,sc10,sc11,sc12,sc13,sc14,sc15,sc16,sc17,sc18
Rows returned: 0
Cypher Query for creating the nodes:
CREATE (c:Cluster{cluster_name:'mycluster',cluster_uuid:'7bd4f66d-5faf-11db-8d0d-000e0cba569c'})
,(sc1:Controller{serialnumber:'7000610071',system_id:'1873784171',hostname:'node01',node_uuid:'7cd70205-66ae-11e0-a4a9-0deba859517d'})
,(sc1)-[:IS_PART_OF_CLUSTER]->(c)
,(sc2:Controller{serialnumber:'7000606111',system_id:'1873778118',hostname:'node02',node_uuid:'b954f0a1-6682-11e0-b8a0-517da924923d'})
,(sc2)-[:IS_PART_OF_CLUSTER]->(c)
,(sc3:Controller{serialnumber:'7000561878',system_id:'1873772083',hostname:'node03',node_uuid:'ac293586-6690-11e0-b8a0-517da924923d'})
,(sc3)-[:IS_PART_OF_CLUSTER]->(c)
,(sc4:Controller{serialnumber:'800000075807',system_id:'1873784143',hostname:'node04',node_uuid:'e8d6c7e5-663e-11e0-b8a0-517da924923d'})
,(sc4)-[:IS_PART_OF_CLUSTER]->(c)
,(sc5:Controller{serialnumber:'7000477261',system_id:'1873745662',hostname:'node05',node_uuid:'1d1ecc64-728c-11e0-bf0e-3d25383f7ed3'})
,(sc5)-[:IS_PART_OF_CLUSTER]->(c)
,(sc6:Controller{serialnumber:'7000477273',system_id:'1873745654',hostname:'node06',node_uuid:'140fb0f9-728c-11e0-afeb-49fcf0b6e6c3'})
,(sc6)-[:IS_PART_OF_CLUSTER]->(c)
,(sc7:Controller{serialnumber:'7000474908',system_id:'1873745665',hostname:'node07',node_uuid:'edbf9c62-728b-11e0-bf0e-3d25383f7ed3'})
,(sc7)-[:IS_PART_OF_CLUSTER]->(c)
,(sc8:Controller{serialnumber:'7000474910',system_id:'1873745695',hostname:'node08',node_uuid:'20dbfe67-7832-11e0-afeb-49fcf0b6e6c3'})
,(sc8)-[:IS_PART_OF_CLUSTER]->(c)
,(sc9:Controller{serialnumber:'7000609864',system_id:'1873802756',hostname:'node09',node_uuid:'a8b75397-6690-11e0-b8a0-517da924923d'})
,(sc9)-[:IS_PART_OF_CLUSTER]->(c)
,(sc10:Controller{serialnumber:'7000610021',system_id:'1873791030',hostname:'node10',node_uuid:'f6cf0705-6670-11e0-b8a0-517da924923d'})
,(sc10)-[:IS_PART_OF_CLUSTER]->(c)
,(sc11:Controller{serialnumber:'7000610057',system_id:'1873784128',hostname:'node11',node_uuid:'551b1bf8-663d-11e0-b8a0-517da924923d'})
,(sc11)-[:IS_PART_OF_CLUSTER]->(c)
,(sc12:Controller{serialnumber:'7000609981',system_id:'1873778164',hostname:'node12',node_uuid:'f6062d6c-663e-11e0-9b53-cd0ece6aa2ce'})
,(sc12)-[:IS_PART_OF_CLUSTER]->(c)
,(sc13:Controller{serialnumber:'7000610033',system_id:'1873778186',hostname:'node13',node_uuid:'ed0e61c5-6670-11e0-b07f-933da0385fdc'})
,(sc13)-[:IS_PART_OF_CLUSTER]->(c)
,(sc14:Controller{serialnumber:'7000610069',system_id:'1873784175',hostname:'node14',node_uuid:'8623ea28-66ae-11e0-ab9d-5fdc7f30dee7'})
,(sc14)-[:IS_PART_OF_CLUSTER]->(c)
,(sc15:Controller{serialnumber:'7000606109',system_id:'1873778197',hostname:'node15',node_uuid:'b4349a83-6682-11e0-ab9d-5fdc7f30dee7'})
,(sc15)-[:IS_PART_OF_CLUSTER]->(c)
,(sc16:Controller{serialnumber:'7000610045',system_id:'1873784157',hostname:'node16',node_uuid:'67d80db8-663d-11e0-9b53-cd0ece6aa2ce'})
,(sc16)-[:IS_PART_OF_CLUSTER]->(c)
,(sc17:Controller{serialnumber:'7001246085',system_id:'2014175904',hostname:'node19',node_uuid:'1c792588-ff4e-11db-94fe-3b91dd7dd242'})
,(sc17)-[:IS_PART_OF_CLUSTER]->(c)
,(sc18:Controller{serialnumber:'7001246097',system_id:'2014176797',hostname:'node20',node_uuid:'3ae9e7ae-ff44-11db-864d-af2af862bba3'})
,(sc18)-[:IS_PART_OF_CLUSTER]->(c)
RETURN c,sc1,sc2,sc3,sc4,sc5,sc6,sc7,sc8,sc9,sc10,sc11,sc12,sc13,sc14,sc15,sc16,sc17,sc18
19 nodes created, 18 relationships.
Now when I run the first query again, it takes one minute and will eventually return with 'Unknown error'.
Cypher Query:
MATCH (c:Cluster{cluster_name:'mycluster',cluster_uuid:'7bd4f66d-5faf-11db-8d0d-000e0cba569c'})
,(sc1:Controller{serialnumber:'7000610071',system_id:'1873784171',hostname:'node01',node_uuid:'7cd70205-66ae-11e0-a4a9-0deba859517d'})
,(sc1)-[:IS_PART_OF_CLUSTER]->(c)
,(sc2:Controller{serialnumber:'7000606111',system_id:'1873778118',hostname:'node02',node_uuid:'b954f0a1-6682-11e0-b8a0-517da924923d'})
,(sc2)-[:IS_PART_OF_CLUSTER]->(c)
,(sc3:Controller{serialnumber:'7000561878',system_id:'1873772083',hostname:'node03',node_uuid:'ac293586-6690-11e0-b8a0-517da924923d'})
,(sc3)-[:IS_PART_OF_CLUSTER]->(c)
,(sc4:Controller{serialnumber:'800000075807',system_id:'1873784143',hostname:'node04',node_uuid:'e8d6c7e5-663e-11e0-b8a0-517da924923d'})
,(sc4)-[:IS_PART_OF_CLUSTER]->(c)
,(sc5:Controller{serialnumber:'7000477261',system_id:'1873745662',hostname:'node05',node_uuid:'1d1ecc64-728c-11e0-bf0e-3d25383f7ed3'})
,(sc5)-[:IS_PART_OF_CLUSTER]->(c)
,(sc6:Controller{serialnumber:'7000477273',system_id:'1873745654',hostname:'node06',node_uuid:'140fb0f9-728c-11e0-afeb-49fcf0b6e6c3'})
,(sc6)-[:IS_PART_OF_CLUSTER]->(c)
,(sc7:Controller{serialnumber:'7000474908',system_id:'1873745665',hostname:'node07',node_uuid:'edbf9c62-728b-11e0-bf0e-3d25383f7ed3'})
,(sc7)-[:IS_PART_OF_CLUSTER]->(c)
,(sc8:Controller{serialnumber:'7000474910',system_id:'1873745695',hostname:'node08',node_uuid:'20dbfe67-7832-11e0-afeb-49fcf0b6e6c3'})
,(sc8)-[:IS_PART_OF_CLUSTER]->(c)
,(sc9:Controller{serialnumber:'7000609864',system_id:'1873802756',hostname:'node09',node_uuid:'a8b75397-6690-11e0-b8a0-517da924923d'})
,(sc9)-[:IS_PART_OF_CLUSTER]->(c)
,(sc10:Controller{serialnumber:'7000610021',system_id:'1873791030',hostname:'node10',node_uuid:'f6cf0705-6670-11e0-b8a0-517da924923d'})
,(sc10)-[:IS_PART_OF_CLUSTER]->(c)
,(sc11:Controller{serialnumber:'7000610057',system_id:'1873784128',hostname:'node11',node_uuid:'551b1bf8-663d-11e0-b8a0-517da924923d'})
,(sc11)-[:IS_PART_OF_CLUSTER]->(c)
,(sc12:Controller{serialnumber:'7000609981',system_id:'1873778164',hostname:'node12',node_uuid:'f6062d6c-663e-11e0-9b53-cd0ece6aa2ce'})
,(sc12)-[:IS_PART_OF_CLUSTER]->(c)
,(sc13:Controller{serialnumber:'7000610033',system_id:'1873778186',hostname:'node13',node_uuid:'ed0e61c5-6670-11e0-b07f-933da0385fdc'})
,(sc13)-[:IS_PART_OF_CLUSTER]->(c)
,(sc14:Controller{serialnumber:'7000610069',system_id:'1873784175',hostname:'node14',node_uuid:'8623ea28-66ae-11e0-ab9d-5fdc7f30dee7'})
,(sc14)-[:IS_PART_OF_CLUSTER]->(c)
,(sc15:Controller{serialnumber:'7000606109',system_id:'1873778197',hostname:'node15',node_uuid:'b4349a83-6682-11e0-ab9d-5fdc7f30dee7'})
,(sc15)-[:IS_PART_OF_CLUSTER]->(c)
,(sc16:Controller{serialnumber:'7000610045',system_id:'1873784157',hostname:'node16',node_uuid:'67d80db8-663d-11e0-9b53-cd0ece6aa2ce'})
,(sc16)-[:IS_PART_OF_CLUSTER]->(c)
,(sc17:Controller{serialnumber:'7001246085',system_id:'2014175904',hostname:'node19',node_uuid:'1c792588-ff4e-11db-94fe-3b91dd7dd242'})
,(sc17)-[:IS_PART_OF_CLUSTER]->(c)
,(sc18:Controller{serialnumber:'7001246097',system_id:'2014176797',hostname:'node20',node_uuid:'3ae9e7ae-ff44-11db-864d-af2af862bba3'})
,(sc18)-[:IS_PART_OF_CLUSTER]->(c)
RETURN c,sc1,sc2,sc3,sc4,sc5,sc6,sc7,sc8,sc9,sc10,sc11,sc12,sc13,sc14,sc15,sc16,sc17,sc18
Returns Unknown Error

Your MATCH query is way to complicated. There's no need to specify every node. The following query returns the cluster and its related controllers:
MATCH (c:Cluster{cluster_name:'mycluster',cluster_uuid:'7bd4f66d-5faf-11db-8d0d-000e0cba569c'})<-[:IS_PART_OF_CLUSTER]-(sc:Controller)
WITH c, collect(sc) as controllers
RETURN c as cluster, controllers

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