2010/10/28 Walaa Eldin Moustafa wa.moust...@gmail.com
Hi Mattias,
Even if I pass nulls, I will still have to build an index on some key
(property). I do not want to do that because it adds the property
index overhead for something that I am not actually using.
I think it's definately worth
...@neotechnology.com
Sent: Thursday, October 28, 2010 10:48 AM
To: Neo4j user discussions user@lists.neo4j.org
Subject: Re: [Neo4j] Node.hasRelationship question
2010/10/28 Walaa Eldin Moustafa wa.moust...@gmail.com
Hi Mattias,
Even if I pass nulls, I will still have to build an index on some
By the way, does the underlying code for index.get(kay, value, start,
end) iterate over all the relationships of start and checks if one is
connected to end, or it does perform a direct look up to get the edges
between (start, end)?
No looping, just a direct lookup. Maybe RelationshipIndex
I am looking for a method that is if given a node n1, can answer the
query if n1 has a relationship of type t with node n2, something along
the lines of:
boolean b = n1.hasRelatioship(n2,t);
I know we can answer this question by iterating over n1's
getRelationships() and testing them. However, I
Hi,
You could try Gremlin -- http://gremlin.tinkerpop.com ...
g:count($n1/ou...@label='t']/i...@id=$n2_id) 0
It will iterate over all out edges of n1, but, you will find more flexibility
in determining if particular paths exist. That is, if you plan more complicated
expressions.
If
2010/10/27, Walaa Eldin Moustafa wa.moust...@gmail.com:
I am looking for a method that is if given a node n1, can answer the
query if n1 has a relationship of type t with node n2, something along
the lines of:
boolean b = n1.hasRelatioship(n2,t);
I know we can answer this question by
Thanks Marko. I was actually referring to something more efficient
than iterating over all the nodes. Gremlin is something that I
definitely want to try, but not for that project.
On Wed, Oct 27, 2010 at 4:16 PM, Marko Rodriguez okramma...@gmail.com wrote:
Hi,
You could try Gremlin --
Hi Mattias,
Even if I pass nulls, I will still have to build an index on some key
(property). I do not want to do that because it adds the property
index overhead for something that I am not actually using.
By the way, does the underlying code for index.get(kay, value, start,
end) iterate over
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