- add dialect.reset_isolation_level(), reverts

- base not implemented methods on Dialect

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/sqlalchemy/engine/base.py b/lib/sqlalchemy/engine/base.py
index 9eb1b8b40..1727e6905 100644
--- a/lib/sqlalchemy/engine/base.py
+++ b/lib/sqlalchemy/engine/base.py
@@ -524,6 +524,21 @@ class Dialect(object):
         """
         return None
 
+    def reset_isolation_level(self, dbapi_conn):
+        """Given a DBAPI connection, revert its isolation to the default."""
+
+        raise NotImplementedError()
+
+    def set_isolation_level(self, dbapi_conn, level):
+        """Given a DBAPI connection, set its isolation level."""
+
+        raise NotImplementedError()
+
+    def get_isolation_level(self, dbapi_conn):
+        """Given a DBAPI connection, return its isolation level."""
+
+        raise NotImplementedError()
+
 
 class ExecutionContext(object):
     """A messenger object for a Dialect that corresponds to a single