make generativeselect available

diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py
index 26a025ddb7b367d3562a52f64a1e7a78dd52f560..52f3decbcfd4fa934b4f60bb2492c845c23d84f7 100644 (file)
--- a/lib/sqlalchemy/sql/expression.py
+++ b/lib/sqlalchemy/sql/expression.py
@@ -45,7 +45,7 @@ from .base import ColumnCollection, Generative, Executable, \
 
 from .selectable import Alias, Join, Select, Selectable, TableClause, \
         CompoundSelect, CTE, FromClause, FromGrouping, SelectBase, \
-        alias, \
+        alias, GenerativeSelect, \
         subquery, HasPrefixes, Exists, ScalarSelect, TextAsFrom