- A large refactoring of the ``sqlalchemy.sql`` package has reorganized

the import structure of many core modules.
``sqlalchemy.schema`` and ``sqlalchemy.types``
remain in the top-level package, but are now just lists of names
that pull from within ``sqlalchemy.sql``.  Their implementations
are now broken out among ``sqlalchemy.sql.type_api``, ``sqlalchemy.sql.sqltypes``,
``sqlalchemy.sql.schema`` and ``sqlalchemy.sql.ddl``, the last of which was
moved from ``sqlalchemy.engine``.  ``sqlalchemy.sql.expression`` is also
a namespace now which pulls implementations mostly from ``sqlalchemy.sql.elements``,
``sqlalchemy.sql.selectable``, and ``sqlalchemy.sql.dml``.
Most of the "factory" functions
used to create SQL expression objects have been moved to classmethods
or constructors, which are exposed in ``sqlalchemy.sql.expression``
using a programmatic system.  Care has been taken such that all the
original import namespaces remain intact and there should be no impact
on any existing applications.   The rationale here was to break out these
very large modules into smaller ones, provide more manageable lists
of function names, to greatly reduce "import cycles" and clarify the
up-front importing of names, and to remove the need for redundant
functions and documentation throughout the expression package.

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/sqlalchemy/engine/base.py b/lib/sqlalchemy/engine/base.py
index f69bd3d4b..83fa34f2c 100644
--- a/lib/sqlalchemy/engine/base.py
+++ b/lib/sqlalchemy/engine/base.py
@@ -11,8 +11,8 @@ from __future__ import with_statement
 
 
 import sys
-from .. import exc, schema, util, log, interfaces
-from ..sql import expression, util as sql_util
+from .. import exc, util, log, interfaces
+from ..sql import expression, util as sql_util, schema, ddl
 from .interfaces import Connectable, Compiled
 from .util import _distill_params
 import contextlib
@@ -1039,7 +1039,7 @@ class Connection(Connectable):
         expression.ClauseElement: _execute_clauseelement,
         Compiled: _execute_compiled,
         schema.SchemaItem: _execute_default,
-        schema.DDLElement: _execute_ddl,
+        ddl.DDLElement: _execute_ddl,
         util.string_types[0]: _execute_text
     }