Hi all.
I created the database neo4j. When I imported the data to neo4j, I always
create relationship without direction between Item and Values.
I want to find every items has value ("some value"): cypher query like this:
Match (nodeItem:labelItem)-->(nodeValue:labelValues{property:"Some Value"})
return nodeItem.
The performance is very fast and return around 250 rows
But when I run the query with nodeValue: with property "No Value", it
takes long time and can't finish after thirty minutes. I think that when I
did this query, neo4j looks like full scan every node in the label Values.
As I estimated, there are around thousand of nodeItem satisfy the condition
of query. But it is doesn't matter in principle.
As I read in neo4j documents, we don't need create bidirection of
relationship between two nodes. So I think that I did sth in wrong way.
But normally, when I use the tool from neo4j: (for example:
http://localhost:7474/db/data/node/1950) and use the function all/in/out
from the node, I found that out direction faster than in direction.
Do you have any recommendation, and notice about config of server or design
database to improve the performance of query to find all node has a
relationship to one specify node.
Thanks
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