在 Neo4j 中查询特定于案例的节点 [英] Query case-specific nodes in neo4j

问题描述

我有一个像附加图片一样的设置.橙色节点表示案例，蓝色节点表示该案例中各种活动的表演者.

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.

我想依次查询每个案例.在每种情况下，我都需要添加关系

I would like to query each case in turn. Within each case, I need to add relationship

[:RELATED {value: 1}] 

from node_i 到 node_k ，对于位于其间的所有 k(ID 落在在 i 和 j 之间)那对 Performer 节点(node_i,node_j)使得:

名称(节点_i) == 名称(节点_j)

和

|ID(node_i) - ID(node_j) |>= 2

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

[示例和预期输出]:

1. 在 Case1 中，由于 ID:1 和 ID:4 的 Performer 节点满足条件，因此在以下之间添加关系:

1. In Case1, since Performer nodes with ID:1 and ID:4 satisfy the criteria, so relationships are added between:

       Node(ID:1) to Node(ID:2)

       Node(ID:1) to Node(ID:3)

1. 在 Case2 中，ID:2 和 ID:4 的 Performer 节点满足条件，因此添加了以下关系:

1. In Case2, Performer nodes with ID:2 and ID:4 satisfy the criteria, so relationships are added between:

       Node(ID:2) to Node(ID:3)

1. 在 Case3 中，有两组节点满足条件，

1. In Case3, there are two sets of nodes satisfying the criteria,

一个.为节点(ID:1)和节点(ID:4)添加来自

a. For Node(ID:1) and Node(ID:4) add relationships from

       Node(ID:1) to Node(ID:2)

       Node(ID:1) to Node(ID:3)

B.对于节点(ID:3)和节点(ID:5)，添加来自

b. For Node(ID:3) and Node(ID:5), add relationship from

       Node(ID:3) to Node(ID:4)

在为上述情况制定 CYPHER 查询时需要提示.

Hint needed in formulating CYPHER queries for the above case.

提前致谢.

推荐答案

正如问题评论中提到的，你的计算应该颠倒:

As mentionned in the question comment, your calculation should be reversed :

node j - node i >= 2

还有一点，对于情况3，按照你的解释，节点2和3之间应该有第三种关系

One point more, for case 3, Following your explanations there should be a third relationship between node 2 and 3

这是我做的一个查询，你可以在这个 Neo4j 控制台中测试它:http://console.neo4j.org/r/gpfesu

Here is a query I made, you can test it in this neo4j console : http://console.neo4j.org/r/gpfesu

MATCH (n:Case) 
MATCH path=(pe)<--(n)-->(pe2)
WHERE pe.name = pe2.name
AND pe2.id - pe.id >= 2
WITH path,n, (pe2.id - pe.id) as length
WITH range(head(nodes(path)).id+1, last(nodes(path)).id-1) as ids,
     n, 
     head(nodes(path)).id as starter,
     length
UNWIND ids as x
MATCH (perf:Performer {id:starter})<--(n)-->(perf2:Performer {id:x})
MERGE (perf)-[:RELATES_TO {value:1, length:length}]->(perf2)

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