Question

与上一个问题How to make the Cypher request to handle those both cases without duplicating Nodes

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我试图用apoc.do.when解决这个问题，但我得到了这个错误

我不知道如何解决这个问题。

Neo.DatabaseError.Statement.ExecutionFailed RULE计划程序不支持调用程序

LOAD CSV WITH HEADERS FROM "file:///the-file-name.csv" as 
line FIELDTERMINATOR ','  
OPTIONAL MATCH (n:Region) 
WHERE  n.region contains "BLANKEMPTYVIDE" AND n.identifier= line.CODE_TER 
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})
CREATE UNIQUE (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}) 
CREATE UNIQUE (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})
CREATE UNIQUE (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

根据cybersam的建议进行更新¸

    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)

当我用MERGE CLAUSE替换Create Unique时Cypher执行因此错误而失败Neo.ClientError.Statement.SyntaxError：未定义变量line（第12行，第20列（偏移：469）） “WITH value.r AS r，line” ^

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

有关cybersam建议的最终更新，它运作良好且完美。

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)

Answer 1

您必须使用3.2之前的neo4j版本the rule planner was removed。

您可以升级到更新版本的neo4j，或者通过使用此子句开始查询来告诉Cypher使用成本计划器：

CYPHER planner=cost

[增订]

您收到的错误消息可能会产生误导。

由于neo4j 3.2+不再支持CREATE UNIQUE子句，请尝试更改所有CREATE UNIQUE子句，以改为使用MERGE。相关条款已经过结构化，只需要创建一个（关系），所以这应该是安全的。

如果这样可以解决您的问题，您应该创建一个关于误导性错误消息的新neo4j issue。

RULE planner不支持调用过程（使用apoc.do.when时）

1 个答案: