Grails1.1でjoin fetch

gistfile1.txt

class Blog {
  String title
  String body
  FileInfo uploadedFile

  static constraints = {
    title()
    body maxSize: 4000
    uploadedFile nullable: true
  }

  static mapping = {
    uploadedFile fetch:'join'
  }
}

gistfile2.txt

Hibernate: 
    select
        top ? this_.id as id0_1_,
        this_.version as version0_1_,
        this_.body as body0_1_,
        this_.title as title0_1_,
        this_.uploaded_file_id as uploaded5_0_1_,
        fileinfo2_.id as id1_0_,
        fileinfo2_.version as version1_0_,
        fileinfo2_.content_type as content3_1_0_,
        fileinfo2_.file_content_id as file4_1_0_,
        fileinfo2_.filename as filename1_0_ 
    from
        blog this_ 
    left outer join
        file_info fileinfo2_ 
            on this_.uploaded_file_id=fileinfo2_.id