I though that this is what I used with MATCH (principals)-[?:IS_MEMBER_OF]->
When I turn it into MATCH (principals)-[?]->()<-[:IS_MEMBER_OF*0..]-(n) RETURN n Nothing at all is returned Am 02.11.2011 11:05, schrieb Jacob Hansson: > On Wed, Nov 2, 2011 at 11:01 AM, D. Frej<dieter_f...@gmx.net> wrote: > >> Hi, >> >> I have a very simply graph: >> >> UserGroup 2<-[:IS_MEMBER_OF]- UserGroup 1, User 3 >> UserGroup 1<-[:IS_MEMBER_OF]- User 1, User 2 >> >> I want to find all nodes that are on the same level or on a level below >> the starting point. Using >> >> START principals=node:nodes(NAME='User 3') >> MATCH (principals)-[?:IS_MEMBER_OF]->()<-[:IS_MEMBER_OF*0..]-(n)" >> RETURN n >> >> I first go one level up and then determine all nodes below this level. >> However, it is not working if I change the start to >> >> START principals=node:nodes(NAME='UserGroup 2') >> (because there is no IS_MEMBER_OF relationship to go up). >> >> Is there a way to ommit this condition if it is not available? To make >> it somehow optional? >> > You could use an optional relationship here. See: > > http://docs.neo4j.org/chunked/snapshot/query-match.html#match-optional-relationship > > Note that this is the snapshot version of the documentation, you will want > to look at the documentation for the version of neo4j you are using to make > sure that this syntax is supported. > > >> Thanks, >> >> - Didi >> _______________________________________________ >> Neo4j mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user >> > > _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
