Thanks Benjamin for the elaborate answer,
You are exactly got my point, each object is a tree. I use neo4j spatial
plugin to
create the objects (I am using neo4j 2.1.2 with the same spatial plugin
version).
I use Neo4j java API for creating the graph (I am not using Cypher, do you
suggest otherwise, i.e., to use Cypher from Java for graph import?), so I
can
use the following snippet to set label for nodes:
Label myLabel = DynamicLabel.label("Label_Name");
myNode.addLabel(myLabel);
Now my questions are:
1- which approach will be more efficient to do?
2- regarding the label to be auto-indexed, then I need only an spatial
index and that would be enough, right?
Best,
Alireza
On Monday, July 21, 2014 4:32:48 PM UTC+2, Benjamin Makus wrote:
>
> That sound's like you've got a tree (or several trees), and it looks like:
> ROOT-NODE
> / | \
> (layer1) A1 A2 A3
> / \ | |
> (layer2) B1 B2 B3 B4
> / \
> (layer3) C1 C2
> Something like this?
>
> Now you can of course say something like "start at root-node, go 2 levels
> deep and return all found nodes", in this case, you would get B1, B2, B3
> and B4. Also you could say "start at B3 and go 1 levels deep" this would
> return C1 and C2.
>
> Regarding your spatial layer: The question is: What kind oft
> framework/tool do you use to create those Geometry objects? If that
> software is only compatible with Neo4j 1.x, but not 2.x then it will not be
> aware of labels.
>
> Of course you can first create your point P and then run a second query to
> attach a label:
> MATCH (n) // match your created point somehow
> SET n:MyPoint // Set Label "MyPoint" for this object
> RETURN n
>
> Label do not decrease performance, but would rather increase performance,
> if you use querys that look for the label. Labels get auto-indexed, and
> this way it's super-fast to query for "all nodes with label x". The only
> performance decrease might be the insert-performance, if you need to run 2
> queries instead of one (if your spatial framework doesn't support labels
> and you've got to run a second query to set the label).
>
>
>
--
You received this message because you are subscribed to the Google Groups
"Neo4j" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
