Question

我有两个表，即
1）地点数据-240万条记录
2）办公室数据-4万条记录

我有一个Neo4J查询，它通过用户界面从用户那里获取3个输入，并在运行时使用纬度/经度信息计算用户之间的距离后输出结果。我只想在运行时计算距离

以下是查询：-

MATCH (c:places), (c2:office)
  WHERE c2.office_id = {office}
  AND c2.city = {city}
  AND c.category = {category}
  RETURN c.places_id as place_name, c.category as Category, 
c.sub_category as Sub_Category, distance(c.location, c2.location) 
as Distance_in_meters order by distance(c.location, c2.location) LIMIT 50

上面的查询花费了大约10-15秒在UI上输出结果，这有点烦人。您能帮忙优化性能吗？

Answer 1

您可以尝试下一个查询：

MATCH (c:places), (c2:office {office_id: YourOffice, city: YourCity, category: YourCategory}) RETURN c.places_id as place_name, c.category as Category, 
c.sub_category as Sub_Category, distance(c.location, c2.location) 
as Distance_in_meters ORDER BY Distance_in_meters ASC/DESC LIMIT 50

并决定如何排序结果：ASC或DESC

如何在Neo4J查询下面进行优化

1 个答案: