Fixed bug whereby using a label_length on dialect that was smaller

than the size of actual column identifiers would fail to render
the columns correctly in a SELECT statement.
[ticket:2610]

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py
index 2fb542a43..4f3655a1d 100644
--- a/lib/sqlalchemy/schema.py
+++ b/lib/sqlalchemy/schema.py
@@ -1114,7 +1114,8 @@ class Column(SchemaItem, expression.ColumnClause):
         c.dispatch._update(self.dispatch)
         return c
 
-    def _make_proxy(self, selectable, name=None, key=None):
+    def _make_proxy(self, selectable, name=None, key=None,
+                            name_is_truncatable=False, **kw):
         """Create a *proxy* for this column.
 
         This is a copy of this ``Column`` referenced by a different parent
@@ -1130,7 +1131,8 @@ class Column(SchemaItem, expression.ColumnClause):
                     "been assigned.")
         try:
             c = self._constructor(
-                expression._as_truncated(name or self.name),
+                expression._as_truncated(name or self.name) if \
+                                name_is_truncatable else (name or self.name),
                 self.type,
                 key=key if key else name if name else self.key,
                 primary_key=self.primary_key,