Hi there, Answers inline.
On Wed, Sep 21, 2011 at 4:49 AM, iamyuanlong <yuanlong1...@gmail.com> wrote: > hi Peter, > This can get the result.But if I want to contain B's Friends too.Should I > use this? > > http://neo4j-community-discussions.438527.n3.nabble.com/file/n3354221/follow%26friend.jpg > Use: > START b=(node_auto_index,'name:B') MATCH a-[:FOLLOW]->b-[:FOLLOW]->a or > a-[:FRIEND]->b-[:FRIEND]->a RETURN a > Unfortunately, OR is not something you can use in the MATCH clause - it's strictly a WHERE animal. So, this doesn't work. Sorry. > > OR: > START b=(node_auto_index,'name:B') MATCH a-[r]->b-[r]->a RETURN where > r.TYPE="FOLLOW" or r.TYPE="FRIEND" a > This has another problem - you are re-using the 'r'-symbol twice, and that's a no-no. What you can do is START b=(node_auto_index,'name:B') MATCH a-[r1]->b-[r2]->a WHERE (type(r1) ="FOLLOW" or type(r2) = "FRIEND") AND (type(r2) = "FOLLOW" or type(r2)="FRIEND") RETURN a This last query doesn't make me very happy - it's far to verbose. We've thrown around the idea of introducing a limited OR in the match, something like this: MATCH a-[:FOLLOW|FRIEND ]->b WDYT? Would that be helpful, or is it just confusing? HTH, Andrés _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
