diff options
Diffstat (limited to 'lib/sqlalchemy/sql/elements.py')
| -rw-r--r-- | lib/sqlalchemy/sql/elements.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py index 045056b42..69e365bd3 100644 --- a/lib/sqlalchemy/sql/elements.py +++ b/lib/sqlalchemy/sql/elements.py @@ -1753,6 +1753,10 @@ class Cast(ColumnElement): """ self.type = type_api.to_instance(totype) self.clause = _literal_as_binds(clause, None) + if isinstance(self.clause, BindParameter) and self.clause.type._isnull: + self.clause = self.clause._clone() + self.clause.type = self.type + self.typeclause = TypeClause(self.type) def _copy_internals(self, clone=_clone, **kw): |