java - Hibernate 中的半正矢公式 - Spring

Question

半正矢公式

SELECT 
   id, 
  (3959 * acos(cos(radians(37)) * cos(radians(lat)) * cos(radians(lng) 
    - radians(-122)) + sin(radians(37)) * sin(radians(lat)))) AS distance 
FROM markers 
HAVING distance < 25 
ORDER BY distance LIMIT 0 , 20

我尝试使用 Hibernate 编写:

String query = "SELECT *, ( 3959 * acos( cos( radians(?) ) * cos( radians( Vehicle.lat ) ) * cos( radians( Vehicle.lng ) - radians(-?) ) + sin( radians(37) ) * sin( radians( Vehicle.lat ) ) ) ) AS distance FROM VehicleDetails Vehicle HAVING distance < 25 ORDER BY distance LIMIT 0 , 20";

Object[] params  = {lat,lng};

List<VehicleDetails> vehicledata = getHibernateTemplate().find(query,params);

Exception: org.hibernate.hql.ast.QuerySyntaxException:

Answer 1

如果没有group by子句，则不需要having子句，可以使用where。我相信错误是由于第一个选择中的 * 引起的，您可能需要重写为

SELECT Vehicle.*, ( 3959 * acos( cos( radians(?) ) * cos( radians( Vehicle.lat ) ) * cos( radians( Vehicle.lng ) - radians(-?) ) + sin( radians(37) ) * sin( radians( Vehicle.lat ) ) ) ) AS distance FROM VehicleDetails Vehicle where distance < 25 ORDER BY distance LIMIT 0 , 20"