orig_set is a Set [ticket:614]

diff --git a/lib/sqlalchemy/sql.py b/lib/sqlalchemy/sql.py
index 489e9d59e2fa84ffa655ee909307f7f3f02a6b60..f9ac753fa885ebcc11b78e39b3d6fda15dcb71e5 100644 (file)
--- a/lib/sqlalchemy/sql.py
+++ b/lib/sqlalchemy/sql.py
@@ -2775,7 +2775,7 @@ class Select(_SelectBaseMixin, FromClause):
         self.is_scalar = scalar
         if scalar:
             # allow corresponding_column to return None
-            self.orig_set = []
+            self.orig_set = util.Set()
             
         # indicates if this select statement, as a subquery, should automatically correlate
         # its FROM clause to that of an enclosing select, update, or delete statement.