Index: lib/sqlalchemy/databases/information_schema.py
===================================================================
--- lib/sqlalchemy/databases/information_schema.py	(revision 817)
+++ lib/sqlalchemy/databases/information_schema.py	(working copy)
@@ -7,6 +7,20 @@
 from sqlalchemy.ansisql import *
 
 generic_engine = ansisql.engine()
+
+gen_schemata = schema.Table("schemata", generic_engine,
+    Column("catalog_name", String),
+    Column("schema_name", String),
+    Column("schema_owner", String),
+    schema="information_schema")                            
+    
+gen_tables = schema.Table("tables", generic_engine,
+    Column("table_catalog", String),
+    Column("table_schema", String),
+    Column("table_name", String),
+    Column("table_type", String),
+    schema="information_schema")
+
 gen_columns = schema.Table("columns", generic_engine,
     Column("table_schema", String),
     Column("table_name", String),
@@ -40,6 +54,25 @@
     Column("constraint_name", 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 AttributeError('information_schema table %s not found' % name)
+            self.cache[name] = gen_tbl.toengine(self.engine)
+        return self.cache[name]
 
 def reflecttable(engine, table, ischema_names, use_mysql=False):
     columns = gen_columns.toengine(engine)
Index: lib/sqlalchemy/engine.py
===================================================================
--- lib/sqlalchemy/engine.py	(revision 817)
+++ lib/sqlalchemy/engine.py	(working copy)
@@ -182,6 +182,18 @@
             self.logger = sys.stdout
         else:
             self.logger = logger
+        self._ischema = None
+
+    def _get_ischema(self):
+        # We use a property for ischema so that the accessor
+        # creation only happens as needed, since otherwise we
+        # have a circularity problem with the generic
+        # ansisql.engine()
+        if self._ischema is None:
+            import sqlalchemy.databases.information_schema as ischema
+            self._ischema = ischema.ISchema(self)
+        return self._ischema
+    ischema = property(_get_ischema)
     
     def _set_paramstyle(self, style):
         self._paramstyle = style