diff -uNr kdesdk-3.5.5.orig/umbrello/umbrello/codegenerators/sqlwriter.cpp kdesdk-3.5.5/umbrello/umbrello/codegenerators/sqlwriter.cpp
--- kdesdk-3.5.5.orig/umbrello/umbrello/codegenerators/sqlwriter.cpp	2006-07-22 18:11:57.000000000 +1000
+++ kdesdk-3.5.5/umbrello/umbrello/codegenerators/sqlwriter.cpp	2006-11-20 16:42:35.000000000 +1100
@@ -86,14 +86,15 @@
     UMLAssociationList aggregations = c->getAggregations();
     if( forceSections() || !aggregations.isEmpty() ) {
         for(UMLAssociation* a = aggregations.first(); a; a = aggregations.next()) {
-            if( a->getObject(Uml::A)->getID() != c->getID() ) {
-
-                sql << m_indentation << "," << m_endl << m_indentation
-                << "CONSTRAINT " << a->getName() << " FOREIGN KEY ("
-                << a->getRoleName(Uml::B) << ") REFERENCES "
-                << a->getObject(Uml::A)->getName()
-                << " (" << a->getRoleName(Uml::A) << ")";
-            }
+            if( a->getObject(Uml::A)->getID() == c->getID() && a->getObject(Uml::B)->getID() != c->getID() )
+		continue;
+	    if ( a->getRoleName(Uml::B) != "" && a->getRoleName(Uml::B) != "") {
+            	    sql << m_indentation << "," << m_endl << m_indentation
+            	    << "CONSTRAINT " << a->getName() << " FOREIGN KEY ("
+            	    << a->getRoleName(Uml::B) << ") REFERENCES "
+            	    << a->getObject(Uml::A)->getName()
+            	    << " (" << a->getRoleName(Uml::A) << ")";
+	    }
         }
     }