diff options
Diffstat (limited to 'lib/sqlalchemy/sql/elements.py')
| -rw-r--r-- | lib/sqlalchemy/sql/elements.py | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py index 69e365bd3..91ce0a090 100644 --- a/lib/sqlalchemy/sql/elements.py +++ b/lib/sqlalchemy/sql/elements.py @@ -1753,7 +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: + if isinstance(self.clause, BindParameter) and ( + self.clause.type._isnull + or self.clause.type._type_affinity is self.type._type_affinity + ): self.clause = self.clause._clone() self.clause.type = self.type |