Question

我在做什么如下。第一个apoc.do.when愉快地消耗行变量，但是当密码达到（WITH value.r AS r，line）时，我得到了错误的代码Neo.ClientError.Statement.SyntaxError：变量行未定义

Cypher执行因此错误而失败Neo.ClientError.Statement.SyntaxError：未定义变量行（第12行，第20列（偏移：469））＆＃34; WITH value.r AS r，line＆＃34; ^

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)

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

我在这里提出了来自cybersam和Dave建议的更新。非常感谢你们两位。

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 db需要35秒。在性能视图中，它是完美的吗？

表示包含1665个csv行的csv文件每行包含6个字段：（Region）第三个和第四个（City）的两个第一个字段，（Sector）的第五个和第六个字段。

Answer 1

您需要在上面的line条款中加入WITH。

...
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的回答之外，您还需要将适当的参数传递给该过程。现在，您传递的是空地图{}。

例如，您第一次拨打apoc.do.when时应指定{n: n, line: line}。您的其他电话也需要适当调整。

Neo.ClientError.Statement.SyntaxError：未定义变量行

2 个答案: