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jvdb
 Post subject: Exception: "No Dialect mapping for JDBC type: -1"
PostPosted: Wed Jul 18, 2007 10:58 am 
Newbie

Joined: Wed Jul 18, 2007 10:49 am
Posts: 2
Hi,

I'm a relatively new user to hibernate.

I'm using hibernate 3 and mysql 4.1.22. I'm trying to execute the following sql query that would get me a list of cities from my database ordered by distance to an input [latitude, longtitude].

To do this, I created a subselect and use mysql functions to do the calculations.

Code:
            SQLQuery q = session.createSQLQuery("select *, sqrt(pow(a, 2) + pow(b, 2)) as distance from (select *, abs(:latitude - latitude) as a, abs(:longitude - longitude) as b from user where activated = true and site_id = :site_id) as temp order by distance");
            q.setParameter("site_id", site.getId());
            q.setParameter("latitude", latitude);
            q.setParameter("longitude", longitude);
            return q.list();


However, I get the following exception on q.list():
Code:
org.hibernate.MappingException: No Dialect mapping for JDBC type: -1
   at org.hibernate.dialect.TypeNames.get(TypeNames.java:56)
   at org.hibernate.dialect.TypeNames.get(TypeNames.java:81)
   at org.hibernate.dialect.Dialect.getHibernateTypeName(Dialect.java:192)
   at org.hibernate.loader.custom.CustomLoader.getHibernateType(CustomLoader.java:170)
   at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:138)
   at org.hibernate.loader.Loader.getResultSet(Loader.java:1678)


What do I need to change to make this work?

Thanks!
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jvdb
 Post subject: Re: Exception: "No Dialect mapping for JDBC type: -1&qu
PostPosted: Wed Jul 18, 2007 4:27 pm 
Newbie

Joined: Wed Jul 18, 2007 10:49 am
Posts: 2
jvdb wrote:

Code:
            SQLQuery q = session.createSQLQuery("select *, sqrt(pow(a, 2) + pow(b, 2)) as distance from (select *, abs(:latitude - latitude) as a, abs(:longitude - longitude) as b from user where activated = true and site_id = :site_id) as temp order by distance");



I solved it myself by transforming it to a HQL:

Code:
from User user where activated = true and site_id = :site_id order by sqrt((abs(:latitude - latitude)*abs(:latitude - latitude)) + (abs(:longitude - longitude)*abs(:longitude - longitude)))
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BasvdB
 Post subject:
PostPosted: Wed Oct 03, 2007 6:31 am 
Beginner
Beginner

Joined: Tue Jan 18, 2005 9:37 am
Posts: 29
Location: The Netherlands
This might help you. http://forum.hibernate.org/viewtopic.ph ... 78#2366178
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ganga_tanwar
 Post subject:
PostPosted: Wed Oct 03, 2007 8:47 am 
Newbie

Joined: Mon Oct 01, 2007 8:59 am
Posts: 18
you can try first query by writing this code in hibernate.cfn.xml file it may resolve ur error "No Dialect mapping for JDBC type: -1"

<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
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