diff options
Diffstat (limited to 'lib/sqlalchemy/sql')
| -rw-r--r-- | lib/sqlalchemy/sql/expression.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py index 48b1d0687..65cc903dd 100644 --- a/lib/sqlalchemy/sql/expression.py +++ b/lib/sqlalchemy/sql/expression.py @@ -3123,6 +3123,12 @@ class CompoundSelect(_SelectBaseMixin, FromClause): def self_group(self, against=None): return _FromGrouping(self) + def is_derived_from(self, fromclause): + for s in self.selects: + if s.is_derived_from(fromclause): + return True + return False + def _populate_column_collection(self): for cols in zip(*[s.c for s in self.selects]): proxy = cols[0]._make_proxy(self, name=self.use_labels and cols[0]._label or None) |