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-rw-r--r--lib/sqlalchemy/sql/expression.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py
index 9272e6d82..2ed3b372f 100644
--- a/lib/sqlalchemy/sql/expression.py
+++ b/lib/sqlalchemy/sql/expression.py
@@ -2993,11 +2993,14 @@ class CompoundSelect(_SelectBaseMixin, FromClause):
self.selects.append(s)
_SelectBaseMixin.__init__(self, **kwargs)
-
+
+ self.oid_column = None
for s in self.selects:
+ # TODO: need to repair proxy_column here to
+ # not require full traversal
if s.oid_column:
self.oid_column = self._proxy_column(s.oid_column)
-
+
def self_group(self, against=None):
return _FromGrouping(self)