- generalized Enum to issue a CHECK constraint + VARCHAR on default platform

- added native_enum=False flag to do the same on MySQL, PG, if desired

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py
index b71c1892b..9324ed6a0 100644
--- a/lib/sqlalchemy/sql/expression.py
+++ b/lib/sqlalchemy/sql/expression.py
@@ -29,12 +29,12 @@ to stay the same in future releases.
 import itertools, re
 from operator import attrgetter
 
-from sqlalchemy import util, exc, types as sqltypes
+from sqlalchemy import util, exc #, types as sqltypes
 from sqlalchemy.sql import operators
 from sqlalchemy.sql.visitors import Visitable, cloned_traverse
 import operator
 
-functions, schema, sql_util = None, None, None
+functions, schema, sql_util, sqltypes = None, None, None, None
 DefaultDialect, ClauseAdapter, Annotated = None, None, None
 
 __all__ = [
@@ -3071,7 +3071,7 @@ class TableClause(_Immutable, FromClause):
     __visit_name__ = 'table'
 
     named_with_column = True
-
+    
     def __init__(self, name, *columns):
         super(TableClause, self).__init__()
         self.name = self.fullname = name