Neo.ClientError.Statement.SyntaxError: Variable line not defined

Question

我正在做的事情如下。第一个 apoc.do.when 愉快地使用了 line 变量，但是当密码到达时 (WITH value.r AS r, line ) 我得到了错误代码 Neo.ClientError.Statement.SyntaxError: Variable line not defined

Cypher 执行失败并出现此错误 Neo.ClientError.Statement.SyntaxError：变量行未定义（第 12 行，第 20 列（偏移量：469））"WITH value.r AS r, line " ^

LOAD CSV WITH HEADERS FROM "file:///the-file-name.csv" as 
line FIELDTERMINATOR ','  
with line as line
OPTIONAL MATCH (n:Region) 
WHERE  n.region contains "BLANKEMPTYVIDE" AND n.identifier= line.CODE_TER 
with n
CALL apoc.do.when(
   n IS NULL,
  'MERGE (r:Region{region: line.TERRITOIRE}) ON CREATE SET r.description=line.TERRITOIRE ON CREATE SET r.identifier=line.CODE_TER ON CREATE SET r.id = toString(id(r)) RETURN r',
  'RETURN n AS r',
  {}) YIELD value
WITH value.r AS r, line 
SET r.identifier=line.CODE_TER
SET r.description=line.TERRITOIRE
SET r.region=line.TERRITOIRE
WITH r,line
OPTIONAL MATCH (ci:City) where ci.cityName contains "BLANKEMPTYVIDE" AND ci.regionIdentifier= line.CODE_TER
CALL apoc.do.when(
   ci IS NULL,
  'MERGE (c:City {cityName:line.BRICK}) ON CREATE SET c.identifier=line.CODE_BRICK ON CREATE SET c.region=line.TERRITOIRE ON CREATE SET c.regionIdentifier=line.CODE_TER ON CREATE SET c.zip=line.CODE_BRICK ON CREATE SET c.description=line.BRICK ON CREATE SET c.id = toString(id(c)) RETURN c',
  'RETURN ci AS c',
  {}) YIELD value
WITH value.c AS c,line,r
SET c.identifier=line.CODE_BRICK 
SET c.region=line.TERRITOIRE
SET c.regionIdentifier=line.CODE_TER
SET c.zip=line.CODE_BRICK
SET c.description=line.BRICK
SET c.cityName=line.BRICK  
WITH c,r,line
MATCH (c {identifier:line.CODE_BRICK}),(r {identifier:line.CODE_TER})
MERGE (c)-[:IS_A_City_BELONGING_TO]->(r)
WITH c,r,line
OPTIONAL MATCH (sec:Sector) 
WHERE  sec.description contains "BLANKEMPTYVIDE" AND sec.regionIdentifier=line.CODE_TER 
CALL apoc.do.when(
   sec IS NULL,
  'MERGE (s:Sector {sectorName:line.SOUSBRICK}) ON CREATE SET s.identifier=line.CODE_SBRICK ON CREATE SET s.region=line.TERRITOIRE ON CREATE SET s.regionIdentifier=line.CODE_TER ON CREATE SET s.city=line.BRICK ON CREATE SET s.cityIdentifier=line.CODE_BRICK ON CREATE SET s.description=line.SOUSBRICK ON CREATE SET s.zip=line.SOUSBRICK ON CREATE SET s.id = toString(id(s)) RETURN s',
  'RETURN sec AS s',
  {}) YIELD value
WITH value.s AS s,line,c,r
SET s.identifier=line.CODE_SBRICK 
SET s.region=line.TERRITOIRE 
SET s.regionIdentifier=line.CODE_TER 
SET s.city=line.BRICK 
SET s.cityIdentifier=line.CODE_BRICK 
SET s.description=line.SOUSBRICK 
SET s.zip=line.SOUSBRICK 
SET s.sectorName = line.SOUSBRICK   
WITH s,c,r,line
MATCH (s {identifier:line.CODE_SBRICK}),(r{identifier:line.CODE_TER}) 
MERGE (s)-[:IS_A_SECTOR_BELONGING_TO_THAT_REGION]->(r) 
WITH s,c,r,line
MATCH (s {identifier:line.CODE_SBRICK}),(c{identifier:line.CODE_BRICK})
MERGE (s)-[:IS_A_SECTOR_BELONGING_TO_THAT_CITY]->(c)

the-file-name.csv 是关于上一个问题 How to make the Cypher request to handle those both cases without duplicating Nodes

我在这里放了 cybersam 和 Dave 的建议更新，非常感谢你们。

LOAD CSV WITH HEADERS FROM "file:///the-file-name.csv" as line 
FIELDTERMINATOR ','  
with line as line
OPTIONAL MATCH (n:Region) 
WHERE  n.region contains "BLANKEMPTYVIDE" AND n.identifier= line.CODE_TER 
WITH n, line
CALL apoc.do.when(
   n IS NULL,
  'MERGE (r:Region{region: line.TERRITOIRE}) ON CREATE SET r.description=line.TERRITOIRE ON CREATE SET r.identifier=line.CODE_TER ON CREATE SET r.id = toString(id(r)) RETURN r',
  'RETURN n AS r',
  {n: n, line: line}) YIELD value
WITH value.r AS r, line 
SET r.identifier=line.CODE_TER
SET r.description=line.TERRITOIRE
SET r.region=line.TERRITOIRE
WITH r,line
OPTIONAL MATCH (ci:City) where ci.cityName contains "BLANKEMPTYVIDE" AND ci.regionIdentifier= line.CODE_TER
CALL apoc.do.when(
   ci IS NULL,
  'MERGE (c:City {cityName:line.BRICK}) ON CREATE SET c.identifier=line.CODE_BRICK ON CREATE SET c.region=line.TERRITOIRE ON CREATE SET c.regionIdentifier=line.CODE_TER ON CREATE SET c.zip=line.CODE_BRICK ON CREATE SET c.description=line.BRICK ON CREATE SET c.id = toString(id(c)) RETURN c',
  'RETURN ci AS c',
  {ci: ci, line: line}) YIELD value
WITH value.c AS c,line,r
SET c.identifier=line.CODE_BRICK 
SET c.region=line.TERRITOIRE
SET c.regionIdentifier=line.CODE_TER
SET c.zip=line.CODE_BRICK
SET c.description=line.BRICK
SET c.cityName=line.BRICK  
WITH c,r,line
MATCH (c {identifier:line.CODE_BRICK}),(r {identifier:line.CODE_TER})
MERGE (c)-[:IS_A_City_BELONGING_TO]->(r)
WITH c,r,line
OPTIONAL MATCH (sec:Sector) 
WHERE  sec.description contains "BLANKEMPTYVIDE" AND sec.regionIdentifier=line.CODE_TER 
CALL apoc.do.when(
   sec IS NULL,
  'MERGE (s:Sector {sectorName:line.SOUSBRICK}) ON CREATE SET s.identifier=line.CODE_SBRICK ON CREATE SET s.region=line.TERRITOIRE ON CREATE SET s.regionIdentifier=line.CODE_TER ON CREATE SET s.city=line.BRICK ON CREATE SET s.cityIdentifier=line.CODE_BRICK ON CREATE SET s.description=line.SOUSBRICK ON CREATE SET s.zip=line.SOUSBRICK ON CREATE SET s.id = toString(id(s)) RETURN s',
  'RETURN sec AS s',
  {sec: sec, line: line}) YIELD value
WITH value.s AS s,line,c,r
SET s.identifier=line.CODE_SBRICK 
SET s.region=line.TERRITOIRE 
SET s.regionIdentifier=line.CODE_TER 
SET s.city=line.BRICK 
SET s.cityIdentifier=line.CODE_BRICK 
SET s.description=line.SOUSBRICK 
SET s.zip=line.SOUSBRICK 
SET s.sectorName = line.SOUSBRICK   
WITH s,c,r,line
MATCH (s {identifier:line.CODE_SBRICK}),(r{identifier:line.CODE_TER}) 
MERGE (s)-[:IS_A_SECTOR_BELONGING_TO_THAT_REGION]->(r) 
WITH s,c,r,line
MATCH (s {identifier:line.CODE_SBRICK}),(c{identifier:line.CODE_BRICK})
MERGE (s)-[:IS_A_SECTOR_BELONGING_TO_THAT_CITY]->(c)

结果：

设置 28271 个属性，创建 3400 个关系，在 34985 毫秒后完成。

将 csv 加载到 neo4j 数据库用了将近 35 秒。请问它在性能视图中是否完美？

对于包含 1665 个 csv 行的 csv 文件每行包含 6 个字段：（地区）的两个第一个字段，第三个和第四个（城市）以及（部门）的第五个和第六个字段。

Answer 1

您需要在上面的 WITH 子句中包含 line。

...
WHERE  n.region contains "BLANKEMPTYVIDE" AND n.identifier= line.CODE_TER 
WITH n, line
...

以及@cybersam 所说的

Answer 2

除了@DaveBennett 的回答，您还需要将适当的参数传递给程序。现在，您传递的是一张空地图，{}。

例如，您对 apoc.do.when 的第一次调用应指定 {n: n, line: line}。你的其他调用也需要适当调整。

Neo.ClientError.Statement.SyntaxError: Variable line not defined

Neo.ClientError.Statement.SyntaxError: Variable line not defined

csv

neo4j

cypher

neo4j-apoc