问题描述
鉴于我的数据库中有一个大图，我想删除该图的整个子图，而我只知道该子图的起始节点.是否可以编写密码查询来匹配和删除整个子图?
Given there is a big graph in my database and I want to delete a whole subgraph of that, where I only know the starting node of this subgraph. Is it possible to write a cypher query to match and delete this whole subgraph?
注意:我不了解子图的更多信息，因为它在哪个节点开始.
Caveat: I don't know more of the subgraph as in which node it starts.
推荐答案
是的，您可以通过APOC过程从单个节点扩展到所有子图节点(可选)在要遍历的关系或节点上具有过滤器，并具有可选的最大深度.
Yes, you can expand from a single node to all subgraph nodes via APOC Procedures path expander, optionally with filters on the relationships or nodes to traverse, and with an optional max depth.
您需要使用expandConfig()过程，并使用NODE_GLOBAL唯一性.
You need to use the expandConfig() procedure, and use NODE_GLOBAL uniqueness.
MATCH (s:Node)
WHERE s.name = 'start'
CALL apoc.path.expandConfig(s, {uniqueness:'NODE_GLOBAL'}) YIELD path
WITH LAST(NODES(path)) as subgraphNode
...
最终，将有一个subgraphNodes()过程将其包装以更好地突出功能.
Eventually there will be a subgraphNodes() procedure to wrap this to better highlight the functionality.
这篇关于匹配/删除Neo4j中的整个子图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！