neo4j-apoc

问题 I am learning cypher and trying to find out a way to create dynamic relationship when a condition passes. Here is an example: we have single node: (n2) and another node which has unknown relationship of TEMP_1 or TEMP_2 with its child: (n1)------[TEMP_1 or TEMP_2]------>(child) we want to create relationship between (n2) and (child) if it exists (n2)------[TEMP_1 or TEMP_2]------>(child) Here is query: MATCH (n1: NODE_1) MATCH (n2: NODE_2) OPTIONAL MATCH (n1)-[rel:TEMP_1|TEMP_2]->(child) CALL

问题 Getting the following error on neo4j server startup with the apoc plugin. Have copied the jar to the plugins folder. Caused by: org.neo4j.kernel.api.exceptions.ComponentInjectionException: Unable to set up injection for procedure 'Static', the field 'apocConfig' has type 'class apoc.ApocConfig' which is not a known injectable component Neo4j version: 4.0.4 Apoc version: 4.0.0.13 What could be the problem? 回答1: I would suggest reviewing the installation procedure to see if you missed any steps

问题 I've just gotten into working with a Neo4J database, and I'm having a hard time figuring out a good way to pivot some data that I'm working with. I have a basic query that looks like this: MATCH (n:DATA) WHERE n.status =~ "SUCCESS" return n.group as Group, n.label as Label, avg(toFloat(n.durationMillis)/60000) as Minutes , which produces tall narrow data like this: |Group |Label |Minutes| |-------|-------|-------| |group1 |label1 |1.0 | |group1 |label2 |2.0 | |group1 |label3 |5.0 | |group2

问题 The procedure apoc.create.relationship(n1,RelType,{},n2) behaves accordingly to the CREATE statement. If a relationship of type RelType already exists between nodes n1 and n2 apoc.create.relationship() will create a duplicate. Is there an equivalent version of apoc.create.relationship() that behaves like MERGE? 回答1: There is a procedure apoc.merge.relationship() which takes same parameters as apoc.create.relationship() and should do what you need. It has been mentioned in this blog post, but

问题 I have the following APOC trigger which contains a apoc procedure. This works as desired but I am wondering if I used a lot of WITH statements, is that the way to go? or is there a better way to refactor this code. I am still new to neo4j so not sure. The control flow- Whenever the Enrollment node is created, it creates an SPerson node and depending on the size(number of SPerson nodes) it creates an enrolled or waitlist(if size>3, and deletes enrolled relation) relation with the course node.

问题 I have the following APOC trigger which contains a apoc procedure. This works as desired but I am wondering if I used a lot of WITH statements, is that the way to go? or is there a better way to refactor this code. I am still new to neo4j so not sure. The control flow- Whenever the Enrollment node is created, it creates an SPerson node and depending on the size(number of SPerson nodes) it creates an enrolled or waitlist(if size>3, and deletes enrolled relation) relation with the course node.

问题 I have the following APOC trigger which contains a apoc procedure. This works as desired but I am wondering if I used a lot of WITH statements, is that the way to go? or is there a better way to refactor this code. I am still new to neo4j so not sure. The control flow- Whenever the Enrollment node is created, it creates an SPerson node and depending on the size(number of SPerson nodes) it creates an enrolled or waitlist(if size>3, and deletes enrolled relation) relation with the course node.

问题 I have the following APOC trigger which contains a apoc procedure. This works as desired but I am wondering if I used a lot of WITH statements, is that the way to go? or is there a better way to refactor this code. I am still new to neo4j so not sure. The control flow- Whenever the Enrollment node is created, it creates an SPerson node and depending on the size(number of SPerson nodes) it creates an enrolled or waitlist(if size>3, and deletes enrolled relation) relation with the course node.

问题 I have the following table <table> <tr> <th> header 1</th> <th> header 2</th> <th> header 3</th> <tr> <td> keyword1 </td> <td> value1.2 </td> <td> <p> paragraph 1 </p> </td> </tr> <tr> <td> keyword2 </td> <td> value2.2 </td> <td> <p> paragraph 2 </p> <p> paragraph 3 </p> </td> </tr> <tr> <td> keyword3 </td> <td> value3.2</td> <td> <p> paragraph 1 </p> <p> paragraph 3 </p> <p> </p> </td> </tr> </table> What method you suggest to use to load it via apoc.load.html and apoc.node.create or apoc

问题 I have the following table <table> <tr> <th> header 1</th> <th> header 2</th> <th> header 3</th> <tr> <td> keyword1 </td> <td> value1.2 </td> <td> <p> paragraph 1 </p> </td> </tr> <tr> <td> keyword2 </td> <td> value2.2 </td> <td> <p> paragraph 2 </p> <p> paragraph 3 </p> </td> </tr> <tr> <td> keyword3 </td> <td> value3.2</td> <td> <p> paragraph 1 </p> <p> paragraph 3 </p> <p> </p> </td> </tr> </table> What method you suggest to use to load it via apoc.load.html and apoc.node.create or apoc