Neo4j-密码节点和关系关系

Question

我有以下查询：

MATCH (dg:DecisionGroup)-[:CONTAINS]->(childD:Decision) 
WHERE dg.id = {decisionGroupId} 
MATCH (filterCharacteristic1:Characteristic) 
WHERE filterCharacteristic1.id = 1 
WITH dg, filterCharacteristic1 
CALL apoc.index.between(childD,'HAS_VALUE_ON',filterCharacteristic1,'(value:(10))') YIELD rel 
WITH DISTINCT rel, childD, dg 
MATCH (childD)-(rel)  // here I need to go further only with 'childD' nodes that have relationship with 'rel'(match `apoc.index.between` predicate)

从上面的查询中您可能会看到-最后，我试图过滤与rel有关系的childD节点，但我不知道如何在Cypher中对其进行描述。 像(childD)-(rel)或(childD)-[rel]不起作用并导致错误。 请帮忙

Answer 1

您需要查找匹配模式并比较关系：

...
WITH DISTINCT rel, childD, dg 
MATCH (childD)-[tmp]-() WHERE tmp = rel
RETURN rel, child, dg

或者您可以直接比较：

...
WITH DISTINCT rel, childD, dg, startNode(rel) AS sRel, endNode(rel) AS eRel 
WHERE (childD)--(sRel) OR (childD)--(eRel)
RETURN rel, child, dg