add descriptor parsing

src/sql/connection.py

@@ -101,13 +101,14 @@ class Connection(object):
                 template = "   {}"
             result.append(template.format(engine_url.__repr__()))
         return "\n".join(result)
+    
     @classmethod
     def _close(cls, descriptor):
         if isinstance(descriptor, Connection):
             conn = descriptor
         else:
             conn = cls.connections.get(descriptor) or cls.connections.get(
-                descriptor.lower()
+                descriptor.lower() or cls.connections.get(descriptor.rsplit('//')[0]+'//'+descriptor.rsplit('//')[1].replace('+',' '))
             )
         if not conn:
             raise Exception(