public join()
 {
     this.fetchField = joinFetch.join;
     this.inverseField = false;
     this.optionalField = false;
 }
 public join()
 {
     sqldeleteField = new customSQL();
     sqlupdateField = new customSQL();
     sqlinsertField = new customSQL();
     itemsField = new List<object>();
     keyField = new key();
     commentField = new comment();
     subselectField = new subselect();
     fetchField = joinFetch.join;
     inverseField = false;
     optionalField = false;
 }