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c# neo4j cypher use regular exp


c# neo4j cypher use regular exp

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c# neo4j cypher use regular exp
Tag : chash , By : Adam
Date : November 24 2020, 09:00 AM

wish help you to fix your issue Well, you're mostly there with the tag of regex - you have 2 options depending on what you want to do, and what your query is. First though - Please read the documentation for Cypher and try your queries out in the Admin window (localhost:7474) first, you'll find it hugely beneficial. In particular for this the Where documentation would have helped you a lot.
Option 1: Regex
var groups = WebApiConfig.GraphClient.Cypher
    .Match("(g:Groups)")
    .Where("g.GroupName =~ {nameParam}")
    .WithParam("nameParam", string.Format(".*{0}.*", query))
    .Return(g => g.As<Groups>())
    .Results;
MATCH (g:Groups) WHERE g.GroupName =~ '.*<your query text>.*' RETURN g
var groups = WebApiConfig.GraphClient.Cypher
    .Match("(g:Groups)")
    .Where((Groups g) => g.GroupName.StartsWith(query))
    .Return(g => g.As<Groups>())
    .Results;
MATCH (g:Groups) WHERE g.GroupName STARTS WITH <your query text> RETURN g
var groupsList = groups.Where(g => g.GroupName.Contains(query)).ToList();
return groups.Where(/*see above*/);

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NEO4J: Is it possible to use regular expressions in Relationshiptypes with Cypher?


Tag : neo4j , By : Jimmy
Date : March 29 2020, 07:55 AM
will help you You should not misuse the relationship type to store data. This can also lead to serious performance problems. Store the data in a property of the relationship.
You will also run into issues with the 32k relationship type limit (link).

Regular Expression in Neo4j Cypher


Tag : neo4j , By : user133834
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Neo4j won't use indexes for regular expressions, so that would definitely affect your query performance as you grow.
Could you some examples of regular expressions? There might be a be another way to go about it.

Neo4j- Cypher Email validation through Regular Expression


Tag : regex , By : Naveen
Date : March 29 2020, 07:55 AM
Does that help Under the hood, your regex is parsed in APOC as a java string. And because the character \ is the escape character in Java, you need to double it if you really want the \ character.
So your query becomes this one :
WITH "^([a-zA-Z0-9_\\-\\.]+)@([a-zA-Z0-9_\\-\\.]+)\\.([a-zA-Z]{2,5})$" AS regex
MATCH (n:Person) where exists(n.person_email)
RETURN n.person_email, apoc.text.regexGroups(n.person_email,regex) AS value 
ORDER BY n.person_email LIMIT 1000
MATCH (n:Person) 
WHERE  n.person_email =~ "^([a-zA-Z0-9_\\-\\.]+)@([a-zA-Z0-9_\\-\\.]+)\\.([a-zA-Z]{2,5})$"
RETURN n

Neo4j Cypher Regular expression not matching


Tag : regex , By : Topher Cyll
Date : March 29 2020, 07:55 AM
Hope that helps Lets see if I can bring some clarity to this.
The regex hklm\\\\s.* is in a string object, which will escape the \ when created and thus be saved as hklm\\s.*. Then once the regex is evaluated it is handled as a new string/regex object that also escapes the \. This means that the regex you search on is hklm\s.*, which doesn't match the target string (which has double \'s).

Neo4j Cypher how to include another relationship node of parent in APOC neo4j cypher query


Tag : neo4j , By : JackIT
Date : March 29 2020, 07:55 AM
I hope this helps you . In the first query, the TAGGED_TO relationship between the parent node Drone and the :Part node is shown because the browser option Connect result nodes is enabled:
MATCH p=(n:Category)-[:SUB_CATEGORY*0..]->(m:Category)<-[:TAGGED_TO]-(part:Part)
WHERE NOT ()-[:SUB_CATEGORY]->(n) AND toLower(part.name) STARTS WITH toLower('atm')
WITH COLLECT(p) AS ps
CALL apoc.convert.toTree(ps) YIELD value
RETURN value
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