- allow the compilation rule that gets the formatted name

to again have the chance to veto rendering, as the naming convention
can make the decision that the name is "none" or not now.

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py
index d273d9881..1447787ce 100644
--- a/lib/sqlalchemy/sql/elements.py
+++ b/lib/sqlalchemy/sql/elements.py
@@ -3209,7 +3209,7 @@ class _defer_name(_truncated_label):
     """
     def __new__(cls, value):
         if value is None:
-            return _defer_none_name('_unnamed_')
+            return _NONE_NAME
         else:
             return super(_defer_name, cls).__new__(cls, value)
 
@@ -3217,6 +3217,8 @@ class _defer_name(_truncated_label):
 class _defer_none_name(_defer_name):
     """indicate a 'deferred' name that was ultimately the value None."""
 
+_NONE_NAME = _defer_none_name("_unnamed_")
+
 # for backwards compatibility in case
 # someone is re-implementing the
 # _truncated_identifier() sequence in a custom