[英]Neo4j: Error: unexpected symbol in “LOAD CSV” in R markdown
I was reading [importing CSV Data into Neo4j][1] and I tried to execute 我正在阅读[将CSV数据导入Neo4j] [1],并尝试执行
library("RNeo4j")
library("curl")
graph <- startGraph("http://localhost:7474/db/data", username = "neo4j", password = "")
clear(graph, input = F)
LOAD CSV WITH HEADERS FROM "file:///data//airlines.csv" AS row
CREATE (n:airlines)
SET n = row,
n.carrier = toFloat(row.carrier),
n.name = toFloat(row.name)
I got the following error message: 我收到以下错误消息:
> > LOAD CSV WITH HEADERS FROM "file:///data//airlines.csv" AS row
Error: unexpected symbol in "LOAD CSV"
> CREATE (n:airlines)
Error: could not find function "CREATE"
> SET n = row,
Error: unexpected symbol in "SET n"
> n.carrier = toFloat(row.carrier),
Error: unexpected ',' in " n.carrier = toFloat(row.carrier),"
> n.name = toFloat(row.name)
Error: could not find function "toFloat"
>
To get familiar with the RNeo4j package, you should check the README in the RNeo4j GitHub repository and the reference manual . 要熟悉RNeo4j软件包,您应该检查RNeo4j GitHub存储库中的自述文件和参考手册 。
You should put your query in a multiline string and use the cypher
function. 您应该将查询放入多行字符串中,并使用cypher
函数。 Note that I changed the quotes to apostrophes ( '
) in the Cypher query. 请注意,我在Cypher查询中将引号更改为撇号( '
)。
I also removed the import for the curl
library as RNeo4j
imports it transitively. 我还删除了curl
库的导入,因为RNeo4j
过渡地导入了它。
library("RNeo4j")
graph = startGraph("http://localhost:7474/db/data", username = "neo4j", password = "")
clear(graph, input = F)
query = "
LOAD CSV WITH HEADERS FROM 'file:///data//airlines.csv' AS row
CREATE (n:airlines)
SET n = row,
n.carrier = toFloat(row.carrier),
n.name = toFloat(row.name)
"
cypher(graph, query)
Make sure that you provide an absolute path to the CSV file as shown in the Neo4j CSV Import Guide . 确保提供《 Neo4j CSV导入指南》中所示的CSV文件的绝对路径。
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