# orm/query.py

# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors

# <see AUTHORS file>

#

# This module is part of SQLAlchemy and is released under

# the MIT License: http://www.opensource.org/licenses/mit-license.php

​

"""The Query class and support.

​

Defines the :class:`.Query` class, the central

construct used by the ORM to construct database queries.

​

The :class:`.Query` class should not be confused with the

:class:`.Select` class, which defines database

SELECT operations at the SQL (non-ORM) level.  ``Query`` differs from

``Select`` in that it returns ORM-mapped objects and interacts with an

ORM session, whereas the ``Select`` construct interacts directly with the

database to return iterable result sets.

​

"""

​

from itertools import chain

​

from . import (

    attributes, interfaces, object_mapper, persistence,

    exc as orm_exc, loading

)

from .base import _entity_descriptor, _is_aliased_class, \

    _is_mapped_class, _orm_columns, _generative, InspectionAttr

from .path_registry import PathRegistry

from .util import (

    AliasedClass, ORMAdapter, join as orm_join, with_parent, aliased

)

from .. import sql, util, log, exc as sa_exc, inspect, inspection

from ..sql.expression import _interpret_as_from

from ..sql import (

    util as sql_util,

    expression, visitors

)

from ..sql.base import ColumnCollection

from . import properties

​

__all__ = ['Query', 'QueryContext', 'aliased']