Description Michael Keith 2010-07-21 14:30:33 EDT

Consider if Entity A has a Map of embeddable B, and B has a field called "myState". Eg:

@Entity
public class A {
   ...

   @ElementCollection
   Map<String,B> myMap;
   ...
}

@Embeddable
public class B {
  ...
  String myState;
  ...
}

then the following JP QL generates an error:

select b.myState from A a join a.myMap b where KEY(b) = 'keyString'
  
See http://hwellmann.blogspot.com/2010/07/jpa-20-querying-map.html for concrete details.