derefences connection pool upon dispose()

diff --git a/lib/sqlalchemy/engine.py b/lib/sqlalchemy/engine.py
index 8bb4767d95372d1a4e3e2494ef74c934c8976a1a..29acdc665cc7f4d7fd4992ec86c899eaefd970d9 100644 (file)
--- a/lib/sqlalchemy/engine.py
+++ b/lib/sqlalchemy/engine.py
@@ -208,6 +208,7 @@ class SQLEngine(schema.SchemaEngine):
         """disposes of the underlying pool manager for this SQLEngine."""
         (cargs, cparams) = self.connect_args()
         sqlalchemy.pool.manage(self.dbapi()).dispose(*cargs, **cparams)
+        self._pool = None
         
     def _set_paramstyle(self, style):
         self._paramstyle = style