Neo4J-Merge语句不创建具有关系的新节点

这是我第一次在创建节点和关系时,一切都很顺利。

// This is the first run

MERGE (Kunal:PERSON)
ON CREATE SET
    Kunal.name = 'Kunal',
    Kunal.type = 'Person',
    Kunal.created = timestamp()
ON MATCH SET
    Kunal.lastUpdated = timestamp()
MERGE (Bangalore: LOC)
ON CREATE SET
    Bangalore.name = 'Bangalore',
    Bangalore.type = 'Location',
    Bangalore.created = timestamp()
ON MATCH SET
    Bangalore.lastUpdated = timestamp()
MERGE (Kunal)-[r1:LIVES_IN]->(Bangalore)
RETURN * 

这里我添加了一个节点 (节点)生活在(关系)中的人 (节点)。第一次一切都很好。

// Next time

MERGE (John:PERSON)
ON CREATE SET
    John.name = 'John',
    John.type = 'Person',
    John.created = timestamp()
ON MATCH SET
    John.lastUpdated = timestamp()
MERGE (Bangalore: LOC)
ON CREATE SET
    Bangalore.name = 'Bangalore',
    Bangalore.type = 'Location',
    Bangalore.created = timestamp()
ON MATCH SET
    Bangalore.lastUpdated = timestamp()
MERGE (John)-[r1:LIVES_IN]->(Bangalore)
RETURN *

约翰 谁住在(rel)

但这里的问题是,它再次从前面的merge语句中获取相同的节点值。

有人能解释一下吗?

另外,如果我们使用Python驱动程序在循环中运行上述合并查询,那么解决方案是什么。

Can't find anything on this tho