> MATCH path = (a)-[]-(b)-[]-(c)-[]-(a) WHERE NONE(n in nodes(path) WHERE n:_META_DATA OR (n)-[:_META_DATA] ) > Am 04.03.2015 um 20:48 schrieb Jaroslav Ramba <[email protected]>: > > The problem is that I do not know the query. All I want is to implement a > method, which will accept (as a parameter) any Cypher query and will add > clause (such as WHERE NOT) that will execute the same query but will also > ignore all nodes and relationships which are labelled as “_META_DATA”. > > So I would be looking for such filter that will ignore these meta nodes and > relationships independently on the rest of the cypher query. Something like > WHERE NOT nodes.label=‘_META_DATA’ and relationships.label=‘_META_DATA’. > > In the example you proposed: > MATCH (a)-[]-(b)-[]-(c)-[]-(a) > WHERE NOT (a)-[:_META_DATA]-(b)-[:_META_DATA]-(c)-[:_META_DATA]-(a) > > WHERE clause is dependent on MATCH clause, so to create a general method to > add WHERE clause to any cypher query, I would need to parse MATCH pattern > first. > > Dne středa 4. března 2015 15:31:25 UTC+1 Mahesh Lal napsal(a): > Assuming that you have the "type" of relationship labelled as "_META_DATA" > you could use > WHERE NOT (a)-[:_META_DATA]-(b)-[:_META_DATA]-(c)-[:_META_DATA]-(a) > > > -- Thanks and Regards > Mahesh Lal > > > On 4 March 2015 at 17:40, Jaroslav Ramba <[email protected] <javascript:>> > wrote: > Ho, > > Let say I have couple nodes and relationships that I want to be hidden. It > means when I query something, those will never be in the result. They are not > supposed to be part or real data that I have in the database. I know there is > no such thing like metadata implemented in Neo4j, but is there any way to > avoid it? > > This is what I have in mind. I would label those nodes and relationships with > something like “_META_DATA”. Then I would receive user’s cypher query - for > example: > > MATCH (a)-[]-(b)-[]-(c)-[]-(a) RETURN a,b,c > > and I would like to add “ignore all nodes and relationships that are labeled > with “_META_DATA” so the cypher query would actually ignore those. So I would > be looking for something like WHERE every_node and every_relationship NOT > labeled “_META_DATA”. > > Is there any way to solve this problem? > > -- > 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] <javascript:>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > > -- > 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] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>.
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