From bf35590e15de3fac7977757d89bc994400f26125 Mon Sep 17 00:00:00 2001
From: Jason Kirtland <jek@discorporate.us>
Date: Fri, 7 Sep 2007 23:13:16 +0000
Subject: [PATCH] Removed DefaultDialect.ischema and information_schema's
 ISchema (which incidentally had a 'toengine' in it...)

---
 .../databases/information_schema.py           | 20 -------------------
 lib/sqlalchemy/engine/default.py              |  7 -------
 2 files changed, 27 deletions(-)

diff --git a/lib/sqlalchemy/databases/information_schema.py b/lib/sqlalchemy/databases/information_schema.py
index 48f33cb963..1b3b3838ab 100644
--- a/lib/sqlalchemy/databases/information_schema.py
+++ b/lib/sqlalchemy/databases/information_schema.py
@@ -76,26 +76,6 @@ ref_constraints = Table("referential_constraints", ischema,
     Column("update_rule", String),
     Column("delete_rule", String),
     schema="information_schema")
-                                   
-class ISchema(object):
-    def __init__(self, engine):
-        self.engine = engine
-        self.cache = {}
-
-    def __getattr__(self, name):
-        if name not in self.cache:
-            # This is a bit of a hack.
-            # It would probably be better to have a dict
-            # with just the information_schema tables at
-            # the module level, so as to avoid returning
-            # unrelated objects that happen to be named
-            # 'gen_*'
-            try:
-                gen_tbl = globals()['gen_'+name]
-            except KeyError:
-                raise exceptions.ArgumentError('information_schema table %s not found' % name)
-            self.cache[name] = gen_tbl.toengine(self.engine)
-        return self.cache[name]
 
 
 def table_names(connection, schema):
diff --git a/lib/sqlalchemy/engine/default.py b/lib/sqlalchemy/engine/default.py
index 07f07d0be6..9732b9e594 100644
--- a/lib/sqlalchemy/engine/default.py
+++ b/lib/sqlalchemy/engine/default.py
@@ -118,13 +118,6 @@ class DefaultDialect(base.Dialect):
 
     def is_disconnect(self, e):
         return False
-        
-    def _get_ischema(self):
-        if self._ischema is None:
-            import sqlalchemy.databases.information_schema as ischema
-            self._ischema = ischema.ISchema(self)
-        return self._ischema
-    ischema = property(_get_ischema, doc="""returns an ISchema object for this engine, which allows access to information_schema tables (if supported)""")
 
 
 class DefaultExecutionContext(base.ExecutionContext):
-- 
2.47.3