neo4j-apoc

How do I fix this Neo4j APOC query that creates nodes froma CSV file?

由 六眼飞鱼酱① 提交于 2019-12-11 05:28:46
问题 I want the query to read the CSV file and create a node for each row in the file. Here's the query: CALL apoc.load.csv('FILE:///C:/Temp/Test/Test/Neo4jTest/import/Neo4j_AttributeProvenance.csv',{sep:","}) YIELD map CALL apoc.create.node(map.NodeType, {key:map.NodeID}) yield node return count(*) Here's the error: Can't coerce `RootNode` to List<String> Here's the data file: NodeType,NodeID,SchemaName,TableName,AttributeName,DataType,PreviousNodeID RootNode,queryprocessingtest.q01

NullPointer using apoc.map.fromPairs in Neo4j Cypher Query

由 北城余情 提交于 2019-12-11 04:27:09
问题 I am using the code below to return all nodes that are 3 inward facing edges from a specific node (id(65)) and format the result as JSON Graph with the help of the apoc.map.fromPairs procedure. I am getting an error if there are no nodes that are 3 edges away from the starting node. It seems that the apoc.map.fromPairs procedure throws the belowerror running against the "null" used for missing parts of the pattern when I include the OPTIONAL statement. Failed to invoke function apoc.map

How to use apoc.load.csv in conjunction with apoc.create.node

由 此生再无相见时 提交于 2019-12-08 04:07:40
问题 I need to import a CSV file and create a node from each record. I am using APOC because supposedly I can use a column in the CSV file to define each node type as the nodes are created. This doesn't work: CALL apoc.load.csv('FILE:///C:/Temp/Test/Test/Neo4jTest/import/Neo4j_AttributeProvenance.csv',{sep:","}) YIELD map CALL apoc.create.node(['map.AttributeName'], {key:['map.NodeID']}) return count(*) This is the error: Procedure call inside a query does not support naming results implicitly

apoc.gephi.add doesn't work : NODE[25512922] has no property with propertyKey='name'

由 烈酒焚心 提交于 2019-12-08 04:07:34
问题 I'm currently trying to set up a streaming connection between a Neo4j DB and Gephi. I use then Apoc with apoc.gephi.add. match path = (p:Person)--(a:Address) call apoc.gephi.add(null, 'workspace1', path) yield nodes, relationships return nodes, relationships limit 20 But I have a problem with this, whom I don't understand the cause. my execution result So Neo4j saying me that I don't have property with propertyKey="name". I tested the query on a movie DB previously and it worked, but there is

UNWIND multiple unrelated arrays loaded from JSON file

由 六月ゝ 毕业季﹏ 提交于 2019-12-06 05:44:50
问题 I'm trying to UNWIND multiple array properties with a single call to apoc.load.json(). The version I have doesn't fully work: some relationships don't get loaded. My guess is that it's due to the piping of output via the WITH command. I can have it all load if I run the unwinds separately for each array-based property, but I'm curious as to how it can be done all together. Any insights and pointers are appreciated =) //LOAD CLASSES AND UNWIND COMMON ITEMS,COMPANIONS,LOCATIONS CALL apoc.load

How to install apoc for neo4j?

由 时光毁灭记忆、已成空白 提交于 2019-12-01 17:48:53
According to https://neo4j-contrib.github.io/neo4j-apoc-procedures/ , one only needs to download the binary jar from http://github.com/neo4j-contrib/neo4j-apoc-procedures/releases/3.1.0.3 to place into the folder "Neo4j CE 3.1.1\plugins". I did so. However, I was unable to call "call apoc.help("apoc")" from the http://localhost:7474/browser/ . cybersam If you installed neo4j using a Windows or Mac installer (which most people do), and not from a zip or tar file, then the plugins folder should be in your database folder, not in your neo4j installation folder. Here is a related answer with a

How to install apoc for neo4j?

由 和自甴很熟 提交于 2019-12-01 16:02:11
问题 According to https://neo4j-contrib.github.io/neo4j-apoc-procedures/, one only needs to download the binary jar from http://github.com/neo4j-contrib/neo4j-apoc-procedures/releases/3.1.0.3 to place into the folder "Neo4j CE 3.1.1\plugins". I did so. However, I was unable to call "call apoc.help("apoc")" from the http://localhost:7474/browser/. 回答1: If you installed neo4j using a Windows or Mac installer (which most people do), and not from a zip or tar file, then the plugins folder should be in

Visualize connected components in Neo4j

由 你离开我真会死。 提交于 2019-12-01 14:27:45
I can find the highest densely connected component in the graph using the code below: CALL algo.unionFind.stream('', ':pnHours', {}) YIELD nodeId,setId // groupBy setId, storing all node ids of the same set id into a list MATCH (node) where id(node) = nodeId WITH setId, collect(node) as nodes // order by the size of nodes list descending ORDER BY size(nodes) DESC LIMIT 1 // limiting to 3 RETURN nodes; But it does not help me visualize the topmost densely connected component (sub-graph) because the output graph it emits are disjoint nodes. Is it possible to visualize the densely connected

APOC is only partially installing its extension in neo4j (one procedure)

由 梦想的初衷 提交于 2019-11-27 15:22:31
I downloaded apoc-3.1.0.3-all.jar and placed it in the plugins for my windows7 Neo4J 3.1.1 system. C:\Users>java -version java version "1.8.0_121" Java(TM) SE Runtime Environment (build 1.8.0_121-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode) Killed the Neo4J process on the computer, and then restated the server. I am only seeing one apoc procedure listed, others give an error about missing procedure. ThereNo sign of errors in the neo4j log. I tried unblocking the jar, and restarting the server. No luck. I have no problem with doing Call db.schema() But something as

APOC is only partially installing its extension in neo4j (one procedure)

由 会有一股神秘感。 提交于 2019-11-26 17:11:51
问题 I downloaded apoc-3.1.0.3-all.jar and placed it in the plugins for my windows7 Neo4J 3.1.1 system. C:\Users>java -version java version "1.8.0_121" Java(TM) SE Runtime Environment (build 1.8.0_121-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode) Killed the Neo4J process on the computer, and then restated the server. I am only seeing one apoc procedure listed, others give an error about missing procedure. ThereNo sign of errors in the neo4j log. I tried unblocking the jar,
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