How to match repeating sub-paths in Cypher

[Daniel Cox]

Hey All,

You know how you can get paths of different lengths from this?:

match path = (startnode)-[:REL*]->()

 

I'd like to do the same thing, but i need more than just a single relationship to repeat:

match path = (startnode)-{[:FIRST_REL]->()-[:SECOND_REL]->()}*

 

I'm just making up syntax there.^ The essential thing is that i need to repeat the section of the path "-[:CONTAINS]->()-[:RELATES_TO]->()" multiple times.

Is this possible?

Thanks!

-Daniel

PS: The freenode IRC channel isn't too lively as of late.

[Peter Neubauer]

Daniel,
you could do

http://docs.neo4j.org/chunked/snapshot/query-where.html#where-filtering-on-relationship-type
which means

match path = (startnode)-[e:*]->() where type(r) =~ /FIRSTREL|SECONDREL/

with regexp, or direct

match path = (startnode)-[e:*]->() where type(r) = "FIRSTREL" OR
type(r)="SECONDREL"

or something along these lines.

Cheers,

/peter neubauer

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[Andres Taylor]

On Wed, Mar 14, 2012 at 1:56 PM, Daniel Cox <danie...@gmail.com> wrote:

You know how you can get paths of different lengths from this?:

match path = (startnode)-[:REL*]->()

 

I'd like to do the same thing, but i need more than just a single relationship to repeat:

match path = (startnode)-{[:FIRST_REL]->()-[:SECOND_REL]->()}*

 

I'm just making up syntax there.^ The essential thing is that i need to repeat the section of the path "-[:CONTAINS]->()-[:RELATES_TO]->()" multiple times.

Is this possible?

Sorry, Daniel, but that is not supported. It's a good idea, and it really should be supported.

Andrés 

[James Thornton]

On Wednesday, March 14, 2012 6:56:26 AM UTC-6, Daniel Cox wrote:

PS: The freenode IRC channel isn't too lively as of late.

I didn't realize there is an IRC channel :-\

- James

[Peter Neubauer]

Yeah,
We haven't been hanging out there lately, mostly because of one more channel being open, that one with bad logging possibility.

Who is interested in having more active conversation there again?

[Daniel Cox]

OK, thanks for that. I also notice that the syntax for this has been cleaned up a bit in 1.7m2.

As to the irc channel, I'd definitely enjoy an occasional conversation there. :) Perhaps is logging is an issue someone could host a logger bot?

-Daniel

[Peter Neubauer]

Daniel,
if you wanna hang out, we are having our next community hangout in 2
weeks, see http://www.meetup.com/graphdb-world/

Cheers,

/peter neubauer

G:  neubauer.peter
S:  peter.neubauer
P:  +46 704 106975
L:   http://www.linkedin.com/in/neubauer
T:   @peterneubauer

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