From df9e3f2fb9804486e2e95bff2f4d2b52fff776c2 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Sun, 4 Dec 2011 15:57:08 -0500
Subject: - reflection process always resets the primary key constraint first,
 fixes extend_existing

---
 lib/sqlalchemy/schema.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/sqlalchemy/schema.py')

diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py
index b5b057625..496d8e652 100644
--- a/lib/sqlalchemy/schema.py
+++ b/lib/sqlalchemy/schema.py
@@ -357,6 +357,9 @@ class Table(SchemaItem, expression.TableClause):
         self._init_items(*args)
 
     def _autoload(self, metadata, autoload_with, include_columns):
+        if self.primary_key.columns:
+            PrimaryKeyConstraint()._set_parent_with_dispatch(self)
+
         if autoload_with:
             autoload_with.run_callable(
                 autoload_with.dialect.reflecttable,
-- 
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