SORT QUERY Too Slow in Neo4j Cypher

Question

I have a simple dataset with following node structure id : int, txt : string

and have 400 000 nodes and I have created an index on id property. When I am running simple query

profile MATCH (n:LABEL) RETURN n.id LIMIT 25

This is using index and running fast but when I am running this query

profile MATCH (n:LABEL) RETURN n.id order by n.id desc limit 25

This query is not using index and returning result in around 1200ms on every time basis.

What am I missing and why the indexes are not getting used in this query?

Answer 1

This is an achilles heel of Neo4j, as ORDER BY indexed properties still doesn't utilize the indexes .

APOC Procedures has some support for obtaining an ordered range utilizing the index , though I've encountered some issues with that previously. Haven't rechecked functionality lately, so it may be worth trying it out.