From c124fa36d5af2c85c87c51d24e92387adffbe3d2 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Wed, 18 May 2016 11:07:02 -0400
Subject: Support "blank" schema when MetaData.schema is set

Previously, it was impossible to have a Table that has
None for a schema name when the "schema" parameter on
MetaData was set.  A new symbol sqlalchemy.schema.BLANK_SCHEMA
is added which indicates that the schema name should unconditionally
be set to None.  In particular, this value must be passed within
cross-schema foreign key reflection, so that a Table which
is in the "default" schema can be represented properly.

Fixes: #3716
Change-Id: I3d24f99c22cded206c5379fd32a225e74edb7a8e
---
 lib/sqlalchemy/schema.py | 1 +
 1 file changed, 1 insertion(+)

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

diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py
index 5b703f7b6..bd0cbe54e 100644
--- a/lib/sqlalchemy/schema.py
+++ b/lib/sqlalchemy/schema.py
@@ -15,6 +15,7 @@ from .sql.base import (
 
 
 from .sql.schema import (
+    BLANK_SCHEMA,
     CheckConstraint,
     Column,
     ColumnDefault,
-- 
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