While it is quite simple to run native SQL Queries in Grails Project using Spring’s NamedParameterJdbcTemplate I never had to actually Map the result of a native SQL back to one of my Grails Domain Classes. After a bit of fiddling around it turned out that everything becomes quite trivial once you get ahold of the Hibernate SessionFactory that is made available by Grails for each request.

Let’s pretend we have the following Grails domain class:

package com.acme.domain
 
class Foo
{
  String name
}

You would execute a native SQL Query that returns a List of Foo instances like this:

import com.acme.domain.*
 
def sessionFactory
sessionFactory = ctx.sessionFactory  // this only necessary if your are working with the Grails console/shell
def session = sessionFactory.currentSession 
 
def query = session.createSQLQuery("select f.* from Foo where f.id = :filter)) order by f.name");
query.addEntity(com.acme.domain.Foo.class);
query.setInteger("filter", 88);
query.list()*.name;