[GitHub] [incubator-age] pdpotter commented on issue #195: Variable Length Edges feature stucks

[GitBox <gi...@apache.org>]

pdpotter commented on issue #195:
URL: https://github.com/apache/incubator-age/issues/195#issuecomment-1063820358


   Some thoughts:
   * The id attribute for node b is defined, depending on the relations in the graph, multiple z nodes could be returned for your query.
   * You are currently including all relations types, can this be limited?
   * Indexes are currently not supported by Apache AGE (see #45). I don't think your query would benefit a lot from using indices though, since it seems to be a scalability issue related to the number of relations.
   * Running your query with `EXPLAIN` / `EXPLAIN ANALYZE` might provide more insight in how your query is executed. Please post the results below:
   ```
   SELECT * FROM cypher('graph', $$ EXPLAIN MATCH (z:type1)-[*..4]->(b:type2 {id: 'CI02597329'}) RETURN z.id $$) as (id agtype);
   ```
   ```
   SELECT * FROM cypher('graph', $$ EXPLAIN ANALYZE MATCH (z:type1)-[*..4]->(b:type2 {id: 'CI02597329'}) RETURN z.id $$) as (id agtype);
   ```
   * Inversing the query should give the execution path and same performance, but it is easy to do, so maybe worth trying:
   ```
   SELECT * FROM cypher('graph', $$ MATCH (b:type2 {id: 'CI02597329'})<-[*..4]-(z:type1) RETURN z.id $$) as (id agtype);
   ```


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