Hibernate 空间查询异常，但在 postgres 控制台中正在工作

Question

I'm trying to execute this query in my Java code, using Hibernate and Hibernate Spatial:

Query q = s.createQuery("SELECT c FROM crimes c WHERE ST_DWITHIN(ST_MakeLine(ARRAY['SRID=4326;POINT(-49.30621000000001 -25.515020000000003)','SRID=4326;POINT(-49.30619 -25.515770000000003)','SRID=4326;POINT(-49.306180000000005 -25.5162)','SRID=4326;POINT(-49.305780000000006 -25.5162)']), c.location, 0.0001) = true;");

But, this query causes an Exception:

e = (org.hibernate.hql.internal.ast.QuerySyntaxException) org.hibernate.hql.internal.ast.QuerySyntaxException: expecting CLOSE_BRACKET, found ',' near line 1, column 151 [SELECT c FROM com.safecity.server.db.model.EntityCrime c WHERE ST_DWITHIN(ST_MakeLine(ARRAY['SRID=4326;POINT(-49.305820000000004 -25.515330000000002)','SRID=4326;POINT(-49.306200000000004 -25.515340000000002)','SRID=4326;POINT(-49.30619 -25.515770000000003)','SRID=4326;POINT(-49.306180000000005 -25.5162)','SRID=4326;POINT(-49.305780000000006 -25.5162)']), c.location, 0.0001) = true]

I checked the query, and I cannot find the error. But, if I get this same query and execute on postgres console, the query is executed without any error and returns the correct value.

Please, someone can help me? Thanks.

Answer 1

You are using native query here in hibernate. For this you have to use the query as below:

Query q = s.createSQLQuery("SELECT c FROM crimes c WHERE ST_DWITHIN(ST_MakeLine(ARRAY['SRID=4326;POINT(-49.30621000000001 -25.515020000000003)','SRID=4326;POINT(-49.30619 -25.515770000000003)','SRID=4326;POINT(-49.306180000000005 -25.5162)','SRID=4326;POINT(-49.305780000000006 -25.5162)']), c.location, 0.0001) = true;");

Use createSQLQuery() instead of createQuery() , if you want to create a db native query instead of HQL.

Answer 2

I solved this problem changing the query, for this one:

Query q = s.createQuery("SELECT c FROM crimes c WHERE ST_DWITHIN(ST_GeomFromText('LINESTRING(-49.305820000000004 -25.515330000000002,-49.306200000000004 -25.515340000000002,-49.30619 -25.515770000000003,-49.306180000000005 -25.5162,-49.305780000000006 -25.5162)', 4326), c.location, 0.0001) = true");

I don't know why, but it works.

Thanks for the help.

Answer 3

I have seen similar problems with ARRAY constructors in Hibernate before.

• PostgreSQL: Issue with passing array to procedure

Replace with an array literal (and optionally a type cast) to make it work. A simple string literal will avoid various complications in the communication.

You are using the PostGis function ST_MakeLine() taking an array of geometry as input parameter.

geometry ST_MakeLine ( geometry[] geoms_array )

So:

Query q = s.createQuery(
  "SELECT c FROM crimes c
   WHERE  ST_DWITHIN(ST_MakeLine('{SRID=4326;POINT(-49.30621000000001 -25.515020000000003)
                                  ,SRID=4326;POINT(-49.30619 -25.515770000000003)
                                  ,SRID=4326;POINT(-49.306180000000005 -25.5162)
                                  ,SRID=4326;POINT(-49.305780000000006 -25.5162)}'::geometry[]), c.location, 0.0001)");

This would also explain why your alternative answer providing a linestring (as string literal!) works as well.

Also simplified the boolean expression in the WHERE clause like I commented . Appending = true is just noise.