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+# orm/query.py
+# Copyright (C) 2005-2025 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+"""The Query class and support.
+
+Defines the :class:`_query.Query` class, the central
+construct used by the ORM to construct database queries.
+
+The :class:`_query.Query` class should not be confused with the
+:class:`_expression.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 __future__ import annotations
+
+import collections.abc as collections_abc
+import operator
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import Dict
+from typing import Generic
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Mapping
+from typing import Optional
+from typing import overload
+from typing import Sequence
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+from . import attributes
+from . import interfaces
+from . import loading
+from . import util as orm_util
+from ._typing import _O
+from .base import _assertions
+from .context import _column_descriptions
+from .context import _determine_last_joined_entity
+from .context import _legacy_filter_by_entity_zero
+from .context import FromStatement
+from .context import ORMCompileState
+from .context import QueryContext
+from .interfaces import ORMColumnDescription
+from .interfaces import ORMColumnsClauseRole
+from .util import AliasedClass
+from .util import object_mapper
+from .util import with_parent
+from .. import exc as sa_exc
+from .. import inspect
+from .. import inspection
+from .. import log
+from .. import sql
+from .. import util
+from ..engine import Result
+from ..engine import Row
+from ..event import dispatcher
+from ..event import EventTarget
+from ..sql import coercions
+from ..sql import expression
+from ..sql import roles
+from ..sql import Select
+from ..sql import util as sql_util
+from ..sql import visitors
+from ..sql._typing import _FromClauseArgument
+from ..sql._typing import _TP
+from ..sql.annotation import SupportsCloneAnnotations
+from ..sql.base import _entity_namespace_key
+from ..sql.base import _generative
+from ..sql.base import _NoArg
+from ..sql.base import Executable
+from ..sql.base import Generative
+from ..sql.elements import BooleanClauseList
+from ..sql.expression import Exists
+from ..sql.selectable import _MemoizedSelectEntities
+from ..sql.selectable import _SelectFromElements
+from ..sql.selectable import ForUpdateArg
+from ..sql.selectable import HasHints
+from ..sql.selectable import HasPrefixes
+from ..sql.selectable import HasSuffixes
+from ..sql.selectable import LABEL_STYLE_TABLENAME_PLUS_COL
+from ..sql.selectable import SelectLabelStyle
+from ..util.typing import Literal
+from ..util.typing import Self
+
+
+if TYPE_CHECKING:
+    from ._typing import _EntityType
+    from ._typing import _ExternalEntityType
+    from ._typing import _InternalEntityType
+    from ._typing import SynchronizeSessionArgument
+    from .mapper import Mapper
+    from .path_registry import PathRegistry
+    from .session import _PKIdentityArgument
+    from .session import Session
+    from .state import InstanceState
+    from ..engine.cursor import CursorResult
+    from ..engine.interfaces import _ImmutableExecuteOptions
+    from ..engine.interfaces import CompiledCacheType
+    from ..engine.interfaces import IsolationLevel
+    from ..engine.interfaces import SchemaTranslateMapType
+    from ..engine.result import FrozenResult
+    from ..engine.result import ScalarResult
+    from ..sql._typing import _ColumnExpressionArgument
+    from ..sql._typing import _ColumnExpressionOrStrLabelArgument
+    from ..sql._typing import _ColumnsClauseArgument
+    from ..sql._typing import _DMLColumnArgument
+    from ..sql._typing import _JoinTargetArgument
+    from ..sql._typing import _LimitOffsetType
+    from ..sql._typing import _MAYBE_ENTITY
+    from ..sql._typing import _no_kw
+    from ..sql._typing import _NOT_ENTITY
+    from ..sql._typing import _OnClauseArgument
+    from ..sql._typing import _PropagateAttrsType
+    from ..sql._typing import _T0
+    from ..sql._typing import _T1
+    from ..sql._typing import _T2
+    from ..sql._typing import _T3
+    from ..sql._typing import _T4
+    from ..sql._typing import _T5
+    from ..sql._typing import _T6
+    from ..sql._typing import _T7
+    from ..sql._typing import _TypedColumnClauseArgument as _TCCA
+    from ..sql.base import CacheableOptions
+    from ..sql.base import ExecutableOption
+    from ..sql.dml import UpdateBase
+    from ..sql.elements import ColumnElement
+    from ..sql.elements import Label
+    from ..sql.selectable import _ForUpdateOfArgument
+    from ..sql.selectable import _JoinTargetElement
+    from ..sql.selectable import _SetupJoinsElement
+    from ..sql.selectable import Alias
+    from ..sql.selectable import CTE
+    from ..sql.selectable import ExecutableReturnsRows
+    from ..sql.selectable import FromClause
+    from ..sql.selectable import ScalarSelect
+    from ..sql.selectable import Subquery
+
+
+__all__ = ["Query", "QueryContext"]
+
+_T = TypeVar("_T", bound=Any)
+
+
+@inspection._self_inspects
+@log.class_logger
+class Query(
+    _SelectFromElements,
+    SupportsCloneAnnotations,
+    HasPrefixes,
+    HasSuffixes,
+    HasHints,
+    EventTarget,
+    log.Identified,
+    Generative,
+    Executable,
+    Generic[_T],
+):
+    """ORM-level SQL construction object.
+
+    .. legacy:: The ORM :class:`.Query` object is a legacy construct
+       as of SQLAlchemy 2.0.   See the notes at the top of
+       :ref:`query_api_toplevel` for an overview, including links to migration
+       documentation.
+
+    :class:`_query.Query` objects are normally initially generated using the
+    :meth:`~.Session.query` method of :class:`.Session`, and in
+    less common cases by instantiating the :class:`_query.Query` directly and
+    associating with a :class:`.Session` using the
+    :meth:`_query.Query.with_session`
+    method.
+
+    """
+
+    # elements that are in Core and can be cached in the same way
+    _where_criteria: Tuple[ColumnElement[Any], ...] = ()
+    _having_criteria: Tuple[ColumnElement[Any], ...] = ()
+
+    _order_by_clauses: Tuple[ColumnElement[Any], ...] = ()
+    _group_by_clauses: Tuple[ColumnElement[Any], ...] = ()
+    _limit_clause: Optional[ColumnElement[Any]] = None
+    _offset_clause: Optional[ColumnElement[Any]] = None
+
+    _distinct: bool = False
+    _distinct_on: Tuple[ColumnElement[Any], ...] = ()
+
+    _for_update_arg: Optional[ForUpdateArg] = None
+    _correlate: Tuple[FromClause, ...] = ()
+    _auto_correlate: bool = True
+    _from_obj: Tuple[FromClause, ...] = ()
+    _setup_joins: Tuple[_SetupJoinsElement, ...] = ()
+
+    _label_style: SelectLabelStyle = SelectLabelStyle.LABEL_STYLE_LEGACY_ORM
+
+    _memoized_select_entities = ()
+
+    _compile_options: Union[Type[CacheableOptions], CacheableOptions] = (
+        ORMCompileState.default_compile_options
+    )
+
+    _with_options: Tuple[ExecutableOption, ...]
+    load_options = QueryContext.default_load_options + {
+        "_legacy_uniquing": True
+    }
+
+    _params: util.immutabledict[str, Any] = util.EMPTY_DICT
+
+    # local Query builder state, not needed for
+    # compilation or execution
+    _enable_assertions = True
+
+    _statement: Optional[ExecutableReturnsRows] = None
+
+    session: Session
+
+    dispatch: dispatcher[Query[_T]]
+
+    # mirrors that of ClauseElement, used to propagate the "orm"
+    # plugin as well as the "subject" of the plugin, e.g. the mapper
+    # we are querying against.
+    @util.memoized_property
+    def _propagate_attrs(self) -> _PropagateAttrsType:
+        return util.EMPTY_DICT
+
+    def __init__(
+        self,
+        entities: Union[
+            _ColumnsClauseArgument[Any], Sequence[_ColumnsClauseArgument[Any]]
+        ],
+        session: Optional[Session] = None,
+    ):
+        """Construct a :class:`_query.Query` directly.
+
+        E.g.::
+
+            q = Query([User, Address], session=some_session)
+
+        The above is equivalent to::
+
+            q = some_session.query(User, Address)
+
+        :param entities: a sequence of entities and/or SQL expressions.
+
+        :param session: a :class:`.Session` with which the
+         :class:`_query.Query`
+         will be associated.   Optional; a :class:`_query.Query`
+         can be associated
+         with a :class:`.Session` generatively via the
+         :meth:`_query.Query.with_session` method as well.
+
+        .. seealso::
+
+            :meth:`.Session.query`
+
+            :meth:`_query.Query.with_session`
+
+        """
+
+        # session is usually present.  There's one case in subqueryloader
+        # where it stores a Query without a Session and also there are tests
+        # for the query(Entity).with_session(session) API which is likely in
+        # some old recipes, however these are legacy as select() can now be
+        # used.
+        self.session = session  # type: ignore
+        self._set_entities(entities)
+
+    def _set_propagate_attrs(self, values: Mapping[str, Any]) -> Self:
+        self._propagate_attrs = util.immutabledict(values)
+        return self
+
+    def _set_entities(
+        self,
+        entities: Union[
+            _ColumnsClauseArgument[Any], Iterable[_ColumnsClauseArgument[Any]]
+        ],
+    ) -> None:
+        self._raw_columns = [
+            coercions.expect(
+                roles.ColumnsClauseRole,
+                ent,
+                apply_propagate_attrs=self,
+                post_inspect=True,
+            )
+            for ent in util.to_list(entities)
+        ]
+
+    def tuples(self: Query[_O]) -> Query[Tuple[_O]]:
+        """return a tuple-typed form of this :class:`.Query`.
+
+        This method invokes the :meth:`.Query.only_return_tuples`
+        method with a value of ``True``, which by itself ensures that this
+        :class:`.Query` will always return :class:`.Row` objects, even
+        if the query is made against a single entity.  It then also
+        at the typing level will return a "typed" query, if possible,
+        that will type result rows as ``Tuple`` objects with typed
+        elements.
+
+        This method can be compared to the :meth:`.Result.tuples` method,
+        which returns "self", but from a typing perspective returns an object
+        that will yield typed ``Tuple`` objects for results.   Typing
+        takes effect only if this :class:`.Query` object is a typed
+        query object already.
+
+        .. versionadded:: 2.0
+
+        .. seealso::
+
+            :meth:`.Result.tuples` - v2 equivalent method.
+
+        """
+        return self.only_return_tuples(True)  # type: ignore
+
+    def _entity_from_pre_ent_zero(self) -> Optional[_InternalEntityType[Any]]:
+        if not self._raw_columns:
+            return None
+
+        ent = self._raw_columns[0]
+
+        if "parententity" in ent._annotations:
+            return ent._annotations["parententity"]  # type: ignore
+        elif "bundle" in ent._annotations:
+            return ent._annotations["bundle"]  # type: ignore
+        else:
+            # label, other SQL expression
+            for element in visitors.iterate(ent):
+                if "parententity" in element._annotations:
+                    return element._annotations["parententity"]  # type: ignore  # noqa: E501
+            else:
+                return None
+
+    def _only_full_mapper_zero(self, methname: str) -> Mapper[Any]:
+        if (
+            len(self._raw_columns) != 1
+            or "parententity" not in self._raw_columns[0]._annotations
+            or not self._raw_columns[0].is_selectable
+        ):
+            raise sa_exc.InvalidRequestError(
+                "%s() can only be used against "
+                "a single mapped class." % methname
+            )
+
+        return self._raw_columns[0]._annotations["parententity"]  # type: ignore  # noqa: E501
+
+    def _set_select_from(
+        self, obj: Iterable[_FromClauseArgument], set_base_alias: bool
+    ) -> None:
+        fa = [
+            coercions.expect(
+                roles.StrictFromClauseRole,
+                elem,
+                allow_select=True,
+                apply_propagate_attrs=self,
+            )
+            for elem in obj
+        ]
+
+        self._compile_options += {"_set_base_alias": set_base_alias}
+        self._from_obj = tuple(fa)
+
+    @_generative
+    def _set_lazyload_from(self, state: InstanceState[Any]) -> Self:
+        self.load_options += {"_lazy_loaded_from": state}
+        return self
+
+    def _get_condition(self) -> None:
+        """used by legacy BakedQuery"""
+        self._no_criterion_condition("get", order_by=False, distinct=False)
+
+    def _get_existing_condition(self) -> None:
+        self._no_criterion_assertion("get", order_by=False, distinct=False)
+
+    def _no_criterion_assertion(
+        self, meth: str, order_by: bool = True, distinct: bool = True
+    ) -> None:
+        if not self._enable_assertions:
+            return
+        if (
+            self._where_criteria
+            or self._statement is not None
+            or self._from_obj
+            or self._setup_joins
+            or self._limit_clause is not None
+            or self._offset_clause is not None
+            or self._group_by_clauses
+            or (order_by and self._order_by_clauses)
+            or (distinct and self._distinct)
+        ):
+            raise sa_exc.InvalidRequestError(
+                "Query.%s() being called on a "
+                "Query with existing criterion. " % meth
+            )
+
+    def _no_criterion_condition(
+        self, meth: str, order_by: bool = True, distinct: bool = True
+    ) -> None:
+        self._no_criterion_assertion(meth, order_by, distinct)
+
+        self._from_obj = self._setup_joins = ()
+        if self._statement is not None:
+            self._compile_options += {"_statement": None}
+        self._where_criteria = ()
+        self._distinct = False
+
+        self._order_by_clauses = self._group_by_clauses = ()
+
+    def _no_clauseelement_condition(self, meth: str) -> None:
+        if not self._enable_assertions:
+            return
+        if self._order_by_clauses:
+            raise sa_exc.InvalidRequestError(
+                "Query.%s() being called on a "
+                "Query with existing criterion. " % meth
+            )
+        self._no_criterion_condition(meth)
+
+    def _no_statement_condition(self, meth: str) -> None:
+        if not self._enable_assertions:
+            return
+        if self._statement is not None:
+            raise sa_exc.InvalidRequestError(
+                (
+                    "Query.%s() being called on a Query with an existing full "
+                    "statement - can't apply criterion."
+                )
+                % meth
+            )
+
+    def _no_limit_offset(self, meth: str) -> None:
+        if not self._enable_assertions:
+            return
+        if self._limit_clause is not None or self._offset_clause is not None:
+            raise sa_exc.InvalidRequestError(
+                "Query.%s() being called on a Query which already has LIMIT "
+                "or OFFSET applied.  Call %s() before limit() or offset() "
+                "are applied." % (meth, meth)
+            )
+
+    @property
+    def _has_row_limiting_clause(self) -> bool:
+        return (
+            self._limit_clause is not None or self._offset_clause is not None
+        )
+
+    def _get_options(
+        self,
+        populate_existing: Optional[bool] = None,
+        version_check: Optional[bool] = None,
+        only_load_props: Optional[Sequence[str]] = None,
+        refresh_state: Optional[InstanceState[Any]] = None,
+        identity_token: Optional[Any] = None,
+    ) -> Self:
+        load_options: Dict[str, Any] = {}
+        compile_options: Dict[str, Any] = {}
+
+        if version_check:
+            load_options["_version_check"] = version_check
+        if populate_existing:
+            load_options["_populate_existing"] = populate_existing
+        if refresh_state:
+            load_options["_refresh_state"] = refresh_state
+            compile_options["_for_refresh_state"] = True
+        if only_load_props:
+            compile_options["_only_load_props"] = frozenset(only_load_props)
+        if identity_token:
+            load_options["_identity_token"] = identity_token
+
+        if load_options:
+            self.load_options += load_options
+        if compile_options:
+            self._compile_options += compile_options
+
+        return self
+
+    def _clone(self, **kw: Any) -> Self:
+        return self._generate()
+
+    def _get_select_statement_only(self) -> Select[_T]:
+        if self._statement is not None:
+            raise sa_exc.InvalidRequestError(
+                "Can't call this method on a Query that uses from_statement()"
+            )
+        return cast("Select[_T]", self.statement)
+
+    @property
+    def statement(self) -> Union[Select[_T], FromStatement[_T], UpdateBase]:
+        """The full SELECT statement represented by this Query.
+
+        The statement by default will not have disambiguating labels
+        applied to the construct unless with_labels(True) is called
+        first.
+
+        """
+
+        # .statement can return the direct future.Select() construct here, as
+        # long as we are not using subsequent adaption features that
+        # are made against raw entities, e.g. from_self(), with_polymorphic(),
+        # select_entity_from().  If these features are being used, then
+        # the Select() we return will not have the correct .selected_columns
+        # collection and will not embed in subsequent queries correctly.
+        # We could find a way to make this collection "correct", however
+        # this would not be too different from doing the full compile as
+        # we are doing in any case, the Select() would still not have the
+        # proper state for other attributes like whereclause, order_by,
+        # and these features are all deprecated in any case.
+        #
+        # for these reasons, Query is not a Select, it remains an ORM
+        # object for which __clause_element__() must be called in order for
+        # it to provide a real expression object.
+        #
+        # from there, it starts to look much like Query itself won't be
+        # passed into the execute process and won't generate its own cache
+        # key; this will all occur in terms of the ORM-enabled Select.
+        stmt: Union[Select[_T], FromStatement[_T], UpdateBase]
+
+        if not self._compile_options._set_base_alias:
+            # if we don't have legacy top level aliasing features in use
+            # then convert to a future select() directly
+            stmt = self._statement_20(for_statement=True)
+        else:
+            stmt = self._compile_state(for_statement=True).statement
+
+        if self._params:
+            stmt = stmt.params(self._params)
+
+        return stmt
+
+    def _final_statement(self, legacy_query_style: bool = True) -> Select[Any]:
+        """Return the 'final' SELECT statement for this :class:`.Query`.
+
+        This is used by the testing suite only and is fairly inefficient.
+
+        This is the Core-only select() that will be rendered by a complete
+        compilation of this query, and is what .statement used to return
+        in 1.3.
+
+
+        """
+
+        q = self._clone()
+
+        return q._compile_state(
+            use_legacy_query_style=legacy_query_style
+        ).statement  # type: ignore
+
+    def _statement_20(
+        self, for_statement: bool = False, use_legacy_query_style: bool = True
+    ) -> Union[Select[_T], FromStatement[_T]]:
+        # TODO: this event needs to be deprecated, as it currently applies
+        # only to ORM query and occurs at this spot that is now more
+        # or less an artificial spot
+        if self.dispatch.before_compile:
+            for fn in self.dispatch.before_compile:
+                new_query = fn(self)
+                if new_query is not None and new_query is not self:
+                    self = new_query
+                    if not fn._bake_ok:  # type: ignore
+                        self._compile_options += {"_bake_ok": False}
+
+        compile_options = self._compile_options
+        compile_options += {
+            "_for_statement": for_statement,
+            "_use_legacy_query_style": use_legacy_query_style,
+        }
+
+        stmt: Union[Select[_T], FromStatement[_T]]
+
+        if self._statement is not None:
+            stmt = FromStatement(self._raw_columns, self._statement)
+            stmt.__dict__.update(
+                _with_options=self._with_options,
+                _with_context_options=self._with_context_options,
+                _compile_options=compile_options,
+                _execution_options=self._execution_options,
+                _propagate_attrs=self._propagate_attrs,
+            )
+        else:
+            # Query / select() internal attributes are 99% cross-compatible
+            stmt = Select._create_raw_select(**self.__dict__)
+            stmt.__dict__.update(
+                _label_style=self._label_style,
+                _compile_options=compile_options,
+                _propagate_attrs=self._propagate_attrs,
+            )
+            stmt.__dict__.pop("session", None)
+
+        # ensure the ORM context is used to compile the statement, even
+        # if it has no ORM entities.  This is so ORM-only things like
+        # _legacy_joins are picked up that wouldn't be picked up by the
+        # Core statement context
+        if "compile_state_plugin" not in stmt._propagate_attrs:
+            stmt._propagate_attrs = stmt._propagate_attrs.union(
+                {"compile_state_plugin": "orm", "plugin_subject": None}
+            )
+
+        return stmt
+
+    def subquery(
+        self,
+        name: Optional[str] = None,
+        with_labels: bool = False,
+        reduce_columns: bool = False,
+    ) -> Subquery:
+        """Return the full SELECT statement represented by
+        this :class:`_query.Query`, embedded within an
+        :class:`_expression.Alias`.
+
+        Eager JOIN generation within the query is disabled.
+
+        .. seealso::
+
+            :meth:`_sql.Select.subquery` - v2 comparable method.
+
+        :param name: string name to be assigned as the alias;
+            this is passed through to :meth:`_expression.FromClause.alias`.
+            If ``None``, a name will be deterministically generated
+            at compile time.
+
+        :param with_labels: if True, :meth:`.with_labels` will be called
+         on the :class:`_query.Query` first to apply table-qualified labels
+         to all columns.
+
+        :param reduce_columns: if True,
+         :meth:`_expression.Select.reduce_columns` will
+         be called on the resulting :func:`_expression.select` construct,
+         to remove same-named columns where one also refers to the other
+         via foreign key or WHERE clause equivalence.
+
+        """
+        q = self.enable_eagerloads(False)
+        if with_labels:
+            q = q.set_label_style(LABEL_STYLE_TABLENAME_PLUS_COL)
+
+        stmt = q._get_select_statement_only()
+
+        if TYPE_CHECKING:
+            assert isinstance(stmt, Select)
+
+        if reduce_columns:
+            stmt = stmt.reduce_columns()
+        return stmt.subquery(name=name)
+
+    def cte(
+        self,
+        name: Optional[str] = None,
+        recursive: bool = False,
+        nesting: bool = False,
+    ) -> CTE:
+        r"""Return the full SELECT statement represented by this
+        :class:`_query.Query` represented as a common table expression (CTE).
+
+        Parameters and usage are the same as those of the
+        :meth:`_expression.SelectBase.cte` method; see that method for
+        further details.
+
+        Here is the `PostgreSQL WITH
+        RECURSIVE example
+        <https://www.postgresql.org/docs/current/static/queries-with.html>`_.
+        Note that, in this example, the ``included_parts`` cte and the
+        ``incl_alias`` alias of it are Core selectables, which
+        means the columns are accessed via the ``.c.`` attribute.  The
+        ``parts_alias`` object is an :func:`_orm.aliased` instance of the
+        ``Part`` entity, so column-mapped attributes are available
+        directly::
+
+            from sqlalchemy.orm import aliased
+
+
+            class Part(Base):
+                __tablename__ = "part"
+                part = Column(String, primary_key=True)
+                sub_part = Column(String, primary_key=True)
+                quantity = Column(Integer)
+
+
+            included_parts = (
+                session.query(Part.sub_part, Part.part, Part.quantity)
+                .filter(Part.part == "our part")
+                .cte(name="included_parts", recursive=True)
+            )
+
+            incl_alias = aliased(included_parts, name="pr")
+            parts_alias = aliased(Part, name="p")
+            included_parts = included_parts.union_all(
+                session.query(
+                    parts_alias.sub_part, parts_alias.part, parts_alias.quantity
+                ).filter(parts_alias.part == incl_alias.c.sub_part)
+            )
+
+            q = session.query(
+                included_parts.c.sub_part,
+                func.sum(included_parts.c.quantity).label("total_quantity"),
+            ).group_by(included_parts.c.sub_part)
+
+        .. seealso::
+
+            :meth:`_sql.Select.cte` - v2 equivalent method.
+
+        """  # noqa: E501
+        return (
+            self.enable_eagerloads(False)
+            ._get_select_statement_only()
+            .cte(name=name, recursive=recursive, nesting=nesting)
+        )
+
+    def label(self, name: Optional[str]) -> Label[Any]:
+        """Return the full SELECT statement represented by this
+        :class:`_query.Query`, converted
+        to a scalar subquery with a label of the given name.
+
+        .. seealso::
+
+            :meth:`_sql.Select.label` - v2 comparable method.
+
+        """
+
+        return (
+            self.enable_eagerloads(False)
+            ._get_select_statement_only()
+            .label(name)
+        )
+
+    @overload
+    def as_scalar(  # type: ignore[overload-overlap]
+        self: Query[Tuple[_MAYBE_ENTITY]],
+    ) -> ScalarSelect[_MAYBE_ENTITY]: ...
+
+    @overload
+    def as_scalar(
+        self: Query[Tuple[_NOT_ENTITY]],
+    ) -> ScalarSelect[_NOT_ENTITY]: ...
+
+    @overload
+    def as_scalar(self) -> ScalarSelect[Any]: ...
+
+    @util.deprecated(
+        "1.4",
+        "The :meth:`_query.Query.as_scalar` method is deprecated and will be "
+        "removed in a future release.  Please refer to "
+        ":meth:`_query.Query.scalar_subquery`.",
+    )
+    def as_scalar(self) -> ScalarSelect[Any]:
+        """Return the full SELECT statement represented by this
+        :class:`_query.Query`, converted to a scalar subquery.
+
+        """
+        return self.scalar_subquery()
+
+    @overload
+    def scalar_subquery(
+        self: Query[Tuple[_MAYBE_ENTITY]],
+    ) -> ScalarSelect[Any]: ...
+
+    @overload
+    def scalar_subquery(
+        self: Query[Tuple[_NOT_ENTITY]],
+    ) -> ScalarSelect[_NOT_ENTITY]: ...
+
+    @overload
+    def scalar_subquery(self) -> ScalarSelect[Any]: ...
+
+    def scalar_subquery(self) -> ScalarSelect[Any]:
+        """Return the full SELECT statement represented by this
+        :class:`_query.Query`, converted to a scalar subquery.
+
+        Analogous to
+        :meth:`sqlalchemy.sql.expression.SelectBase.scalar_subquery`.
+
+        .. versionchanged:: 1.4 The :meth:`_query.Query.scalar_subquery`
+           method replaces the :meth:`_query.Query.as_scalar` method.
+
+        .. seealso::
+
+            :meth:`_sql.Select.scalar_subquery` - v2 comparable method.
+
+        """
+
+        return (
+            self.enable_eagerloads(False)
+            ._get_select_statement_only()
+            .scalar_subquery()
+        )
+
+    @property
+    def selectable(self) -> Union[Select[_T], FromStatement[_T], UpdateBase]:
+        """Return the :class:`_expression.Select` object emitted by this
+        :class:`_query.Query`.
+
+        Used for :func:`_sa.inspect` compatibility, this is equivalent to::
+
+            query.enable_eagerloads(False).with_labels().statement
+
+        """
+        return self.__clause_element__()
+
+    def __clause_element__(
+        self,
+    ) -> Union[Select[_T], FromStatement[_T], UpdateBase]:
+        return (
+            self._with_compile_options(
+                _enable_eagerloads=False, _render_for_subquery=True
+            )
+            .set_label_style(LABEL_STYLE_TABLENAME_PLUS_COL)
+            .statement
+        )
+
+    @overload
+    def only_return_tuples(
+        self: Query[_O], value: Literal[True]
+    ) -> RowReturningQuery[Tuple[_O]]: ...
+
+    @overload
+    def only_return_tuples(
+        self: Query[_O], value: Literal[False]
+    ) -> Query[_O]: ...
+
+    @_generative
+    def only_return_tuples(self, value: bool) -> Query[Any]:
+        """When set to True, the query results will always be a
+        :class:`.Row` object.
+
+        This can change a query that normally returns a single entity
+        as a scalar to return a :class:`.Row` result in all cases.
+
+        .. seealso::
+
+            :meth:`.Query.tuples` - returns tuples, but also at the typing
+            level will type results as ``Tuple``.
+
+            :meth:`_query.Query.is_single_entity`
+
+            :meth:`_engine.Result.tuples` - v2 comparable method.
+
+        """
+        self.load_options += dict(_only_return_tuples=value)
+        return self
+
+    @property
+    def is_single_entity(self) -> bool:
+        """Indicates if this :class:`_query.Query`
+        returns tuples or single entities.
+
+        Returns True if this query returns a single entity for each instance
+        in its result list, and False if this query returns a tuple of entities
+        for each result.
+
+        .. versionadded:: 1.3.11
+
+        .. seealso::
+
+            :meth:`_query.Query.only_return_tuples`
+
+        """
+        return (
+            not self.load_options._only_return_tuples
+            and len(self._raw_columns) == 1
+            and "parententity" in self._raw_columns[0]._annotations
+            and isinstance(
+                self._raw_columns[0]._annotations["parententity"],
+                ORMColumnsClauseRole,
+            )
+        )
+
+    @_generative
+    def enable_eagerloads(self, value: bool) -> Self:
+        """Control whether or not eager joins and subqueries are
+        rendered.
+
+        When set to False, the returned Query will not render
+        eager joins regardless of :func:`~sqlalchemy.orm.joinedload`,
+        :func:`~sqlalchemy.orm.subqueryload` options
+        or mapper-level ``lazy='joined'``/``lazy='subquery'``
+        configurations.
+
+        This is used primarily when nesting the Query's
+        statement into a subquery or other
+        selectable, or when using :meth:`_query.Query.yield_per`.
+
+        """
+        self._compile_options += {"_enable_eagerloads": value}
+        return self
+
+    @_generative
+    def _with_compile_options(self, **opt: Any) -> Self:
+        self._compile_options += opt
+        return self
+
+    @util.became_legacy_20(
+        ":meth:`_orm.Query.with_labels` and :meth:`_orm.Query.apply_labels`",
+        alternative="Use set_label_style(LABEL_STYLE_TABLENAME_PLUS_COL) "
+        "instead.",
+    )
+    def with_labels(self) -> Self:
+        return self.set_label_style(
+            SelectLabelStyle.LABEL_STYLE_TABLENAME_PLUS_COL
+        )
+
+    apply_labels = with_labels
+
+    @property
+    def get_label_style(self) -> SelectLabelStyle:
+        """
+        Retrieve the current label style.
+
+        .. versionadded:: 1.4
+
+        .. seealso::
+
+            :meth:`_sql.Select.get_label_style` - v2 equivalent method.
+
+        """
+        return self._label_style
+
+    def set_label_style(self, style: SelectLabelStyle) -> Self:
+        """Apply column labels to the return value of Query.statement.
+
+        Indicates that this Query's `statement` accessor should return
+        a SELECT statement that applies labels to all columns in the
+        form <tablename>_<columnname>; this is commonly used to
+        disambiguate columns from multiple tables which have the same
+        name.
+
+        When the `Query` actually issues SQL to load rows, it always
+        uses column labeling.
+
+        .. note:: The :meth:`_query.Query.set_label_style` method *only* applies
+           the output of :attr:`_query.Query.statement`, and *not* to any of
+           the result-row invoking systems of :class:`_query.Query` itself,
+           e.g.
+           :meth:`_query.Query.first`, :meth:`_query.Query.all`, etc.
+           To execute
+           a query using :meth:`_query.Query.set_label_style`, invoke the
+           :attr:`_query.Query.statement` using :meth:`.Session.execute`::
+
+                result = session.execute(
+                    query.set_label_style(LABEL_STYLE_TABLENAME_PLUS_COL).statement
+                )
+
+        .. versionadded:: 1.4
+
+
+        .. seealso::
+
+            :meth:`_sql.Select.set_label_style` - v2 equivalent method.
+
+        """  # noqa
+        if self._label_style is not style:
+            self = self._generate()
+            self._label_style = style
+        return self
+
+    @_generative
+    def enable_assertions(self, value: bool) -> Self:
+        """Control whether assertions are generated.
+
+        When set to False, the returned Query will
+        not assert its state before certain operations,
+        including that LIMIT/OFFSET has not been applied
+        when filter() is called, no criterion exists
+        when get() is called, and no "from_statement()"
+        exists when filter()/order_by()/group_by() etc.
+        is called.  This more permissive mode is used by
+        custom Query subclasses to specify criterion or
+        other modifiers outside of the usual usage patterns.
+
+        Care should be taken to ensure that the usage
+        pattern is even possible.  A statement applied
+        by from_statement() will override any criterion
+        set by filter() or order_by(), for example.
+
+        """
+        self._enable_assertions = value
+        return self
+
+    @property
+    def whereclause(self) -> Optional[ColumnElement[bool]]:
+        """A readonly attribute which returns the current WHERE criterion for
+        this Query.
+
+        This returned value is a SQL expression construct, or ``None`` if no
+        criterion has been established.
+
+        .. seealso::
+
+            :attr:`_sql.Select.whereclause` - v2 equivalent property.
+
+        """
+        return BooleanClauseList._construct_for_whereclause(
+            self._where_criteria
+        )
+
+    @_generative
+    def _with_current_path(self, path: PathRegistry) -> Self:
+        """indicate that this query applies to objects loaded
+        within a certain path.
+
+        Used by deferred loaders (see strategies.py) which transfer
+        query options from an originating query to a newly generated
+        query intended for the deferred load.
+
+        """
+        self._compile_options += {"_current_path": path}
+        return self
+
+    @_generative
+    def yield_per(self, count: int) -> Self:
+        r"""Yield only ``count`` rows at a time.
+
+        The purpose of this method is when fetching very large result sets
+        (> 10K rows), to batch results in sub-collections and yield them
+        out partially, so that the Python interpreter doesn't need to declare
+        very large areas of memory which is both time consuming and leads
+        to excessive memory use.   The performance from fetching hundreds of
+        thousands of rows can often double when a suitable yield-per setting
+        (e.g. approximately 1000) is used, even with DBAPIs that buffer
+        rows (which are most).
+
+        As of SQLAlchemy 1.4, the :meth:`_orm.Query.yield_per` method is
+        equivalent to using the ``yield_per`` execution option at the ORM
+        level. See the section :ref:`orm_queryguide_yield_per` for further
+        background on this option.
+
+        .. seealso::
+
+            :ref:`orm_queryguide_yield_per`
+
+        """
+        self.load_options += {"_yield_per": count}
+        return self
+
+    @util.became_legacy_20(
+        ":meth:`_orm.Query.get`",
+        alternative="The method is now available as :meth:`_orm.Session.get`",
+    )
+    def get(self, ident: _PKIdentityArgument) -> Optional[Any]:
+        """Return an instance based on the given primary key identifier,
+        or ``None`` if not found.
+
+        E.g.::
+
+            my_user = session.query(User).get(5)
+
+            some_object = session.query(VersionedFoo).get((5, 10))
+
+            some_object = session.query(VersionedFoo).get({"id": 5, "version_id": 10})
+
+        :meth:`_query.Query.get` is special in that it provides direct
+        access to the identity map of the owning :class:`.Session`.
+        If the given primary key identifier is present
+        in the local identity map, the object is returned
+        directly from this collection and no SQL is emitted,
+        unless the object has been marked fully expired.
+        If not present,
+        a SELECT is performed in order to locate the object.
+
+        :meth:`_query.Query.get` also will perform a check if
+        the object is present in the identity map and
+        marked as expired - a SELECT
+        is emitted to refresh the object as well as to
+        ensure that the row is still present.
+        If not, :class:`~sqlalchemy.orm.exc.ObjectDeletedError` is raised.
+
+        :meth:`_query.Query.get` is only used to return a single
+        mapped instance, not multiple instances or
+        individual column constructs, and strictly
+        on a single primary key value.  The originating
+        :class:`_query.Query` must be constructed in this way,
+        i.e. against a single mapped entity,
+        with no additional filtering criterion.  Loading
+        options via :meth:`_query.Query.options` may be applied
+        however, and will be used if the object is not
+        yet locally present.
+
+        :param ident: A scalar, tuple, or dictionary representing the
+         primary key.  For a composite (e.g. multiple column) primary key,
+         a tuple or dictionary should be passed.
+
+         For a single-column primary key, the scalar calling form is typically
+         the most expedient.  If the primary key of a row is the value "5",
+         the call looks like::
+
+            my_object = query.get(5)
+
+         The tuple form contains primary key values typically in
+         the order in which they correspond to the mapped
+         :class:`_schema.Table`
+         object's primary key columns, or if the
+         :paramref:`_orm.Mapper.primary_key` configuration parameter were
+         used, in
+         the order used for that parameter. For example, if the primary key
+         of a row is represented by the integer
+         digits "5, 10" the call would look like::
+
+             my_object = query.get((5, 10))
+
+         The dictionary form should include as keys the mapped attribute names
+         corresponding to each element of the primary key.  If the mapped class
+         has the attributes ``id``, ``version_id`` as the attributes which
+         store the object's primary key value, the call would look like::
+
+            my_object = query.get({"id": 5, "version_id": 10})
+
+         .. versionadded:: 1.3 the :meth:`_query.Query.get`
+            method now optionally
+            accepts a dictionary of attribute names to values in order to
+            indicate a primary key identifier.
+
+
+        :return: The object instance, or ``None``.
+
+        """  # noqa: E501
+        self._no_criterion_assertion("get", order_by=False, distinct=False)
+
+        # we still implement _get_impl() so that baked query can override
+        # it
+        return self._get_impl(ident, loading.load_on_pk_identity)
+
+    def _get_impl(
+        self,
+        primary_key_identity: _PKIdentityArgument,
+        db_load_fn: Callable[..., Any],
+        identity_token: Optional[Any] = None,
+    ) -> Optional[Any]:
+        mapper = self._only_full_mapper_zero("get")
+        return self.session._get_impl(
+            mapper,
+            primary_key_identity,
+            db_load_fn,
+            populate_existing=self.load_options._populate_existing,
+            with_for_update=self._for_update_arg,
+            options=self._with_options,
+            identity_token=identity_token,
+            execution_options=self._execution_options,
+        )
+
+    @property
+    def lazy_loaded_from(self) -> Optional[InstanceState[Any]]:
+        """An :class:`.InstanceState` that is using this :class:`_query.Query`
+        for a lazy load operation.
+
+        .. deprecated:: 1.4  This attribute should be viewed via the
+           :attr:`.ORMExecuteState.lazy_loaded_from` attribute, within
+           the context of the :meth:`.SessionEvents.do_orm_execute`
+           event.
+
+        .. seealso::
+
+            :attr:`.ORMExecuteState.lazy_loaded_from`
+
+        """
+        return self.load_options._lazy_loaded_from  # type: ignore
+
+    @property
+    def _current_path(self) -> PathRegistry:
+        return self._compile_options._current_path  # type: ignore
+
+    @_generative
+    def correlate(
+        self,
+        *fromclauses: Union[Literal[None, False], _FromClauseArgument],
+    ) -> Self:
+        """Return a :class:`.Query` construct which will correlate the given
+        FROM clauses to that of an enclosing :class:`.Query` or
+        :func:`~.expression.select`.
+
+        The method here accepts mapped classes, :func:`.aliased` constructs,
+        and :class:`_orm.Mapper` constructs as arguments, which are resolved
+        into expression constructs, in addition to appropriate expression
+        constructs.
+
+        The correlation arguments are ultimately passed to
+        :meth:`_expression.Select.correlate`
+        after coercion to expression constructs.
+
+        The correlation arguments take effect in such cases
+        as when :meth:`_query.Query.from_self` is used, or when
+        a subquery as returned by :meth:`_query.Query.subquery` is
+        embedded in another :func:`_expression.select` construct.
+
+        .. seealso::
+
+            :meth:`_sql.Select.correlate` - v2 equivalent method.
+
+        """
+
+        self._auto_correlate = False
+        if fromclauses and fromclauses[0] in {None, False}:
+            self._correlate = ()
+        else:
+            self._correlate = self._correlate + tuple(
+                coercions.expect(roles.FromClauseRole, f) for f in fromclauses
+            )
+        return self
+
+    @_generative
+    def autoflush(self, setting: bool) -> Self:
+        """Return a Query with a specific 'autoflush' setting.
+
+        As of SQLAlchemy 1.4, the :meth:`_orm.Query.autoflush` method
+        is equivalent to using the ``autoflush`` execution option at the
+        ORM level. See the section :ref:`orm_queryguide_autoflush` for
+        further background on this option.
+
+        """
+        self.load_options += {"_autoflush": setting}
+        return self
+
+    @_generative
+    def populate_existing(self) -> Self:
+        """Return a :class:`_query.Query`
+        that will expire and refresh all instances
+        as they are loaded, or reused from the current :class:`.Session`.
+
+        As of SQLAlchemy 1.4, the :meth:`_orm.Query.populate_existing` method
+        is equivalent to using the ``populate_existing`` execution option at
+        the ORM level. See the section :ref:`orm_queryguide_populate_existing`
+        for further background on this option.
+
+        """
+        self.load_options += {"_populate_existing": True}
+        return self
+
+    @_generative
+    def _with_invoke_all_eagers(self, value: bool) -> Self:
+        """Set the 'invoke all eagers' flag which causes joined- and
+        subquery loaders to traverse into already-loaded related objects
+        and collections.
+
+        Default is that of :attr:`_query.Query._invoke_all_eagers`.
+
+        """
+        self.load_options += {"_invoke_all_eagers": value}
+        return self
+
+    @util.became_legacy_20(
+        ":meth:`_orm.Query.with_parent`",
+        alternative="Use the :func:`_orm.with_parent` standalone construct.",
+    )
+    @util.preload_module("sqlalchemy.orm.relationships")
+    def with_parent(
+        self,
+        instance: object,
+        property: Optional[  # noqa: A002
+            attributes.QueryableAttribute[Any]
+        ] = None,
+        from_entity: Optional[_ExternalEntityType[Any]] = None,
+    ) -> Self:
+        """Add filtering criterion that relates the given instance
+        to a child object or collection, using its attribute state
+        as well as an established :func:`_orm.relationship()`
+        configuration.
+
+        The method uses the :func:`.with_parent` function to generate
+        the clause, the result of which is passed to
+        :meth:`_query.Query.filter`.
+
+        Parameters are the same as :func:`.with_parent`, with the exception
+        that the given property can be None, in which case a search is
+        performed against this :class:`_query.Query` object's target mapper.
+
+        :param instance:
+          An instance which has some :func:`_orm.relationship`.
+
+        :param property:
+          Class bound attribute which indicates
+          what relationship from the instance should be used to reconcile the
+          parent/child relationship.
+
+        :param from_entity:
+          Entity in which to consider as the left side.  This defaults to the
+          "zero" entity of the :class:`_query.Query` itself.
+
+        """
+        relationships = util.preloaded.orm_relationships
+
+        if from_entity:
+            entity_zero = inspect(from_entity)
+        else:
+            entity_zero = _legacy_filter_by_entity_zero(self)
+        if property is None:
+            # TODO: deprecate, property has to be supplied
+            mapper = object_mapper(instance)
+
+            for prop in mapper.iterate_properties:
+                if (
+                    isinstance(prop, relationships.RelationshipProperty)
+                    and prop.mapper is entity_zero.mapper  # type: ignore
+                ):
+                    property = prop  # type: ignore  # noqa: A001
+                    break
+            else:
+                raise sa_exc.InvalidRequestError(
+                    "Could not locate a property which relates instances "
+                    "of class '%s' to instances of class '%s'"
+                    % (
+                        entity_zero.mapper.class_.__name__,  # type: ignore
+                        instance.__class__.__name__,
+                    )
+                )
+
+        return self.filter(
+            with_parent(
+                instance,
+                property,  # type: ignore
+                entity_zero.entity,  # type: ignore
+            )
+        )
+
+    @_generative
+    def add_entity(
+        self,
+        entity: _EntityType[Any],
+        alias: Optional[Union[Alias, Subquery]] = None,
+    ) -> Query[Any]:
+        """add a mapped entity to the list of result columns
+        to be returned.
+
+        .. seealso::
+
+            :meth:`_sql.Select.add_columns` - v2 comparable method.
+        """
+
+        if alias is not None:
+            # TODO: deprecate
+            entity = AliasedClass(entity, alias)
+
+        self._raw_columns = list(self._raw_columns)
+
+        self._raw_columns.append(
+            coercions.expect(
+                roles.ColumnsClauseRole, entity, apply_propagate_attrs=self
+            )
+        )
+        return self
+
+    @_generative
+    def with_session(self, session: Session) -> Self:
+        """Return a :class:`_query.Query` that will use the given
+        :class:`.Session`.
+
+        While the :class:`_query.Query`
+        object is normally instantiated using the
+        :meth:`.Session.query` method, it is legal to build the
+        :class:`_query.Query`
+        directly without necessarily using a :class:`.Session`.  Such a
+        :class:`_query.Query` object, or any :class:`_query.Query`
+        already associated
+        with a different :class:`.Session`, can produce a new
+        :class:`_query.Query`
+        object associated with a target session using this method::
+
+            from sqlalchemy.orm import Query
+
+            query = Query([MyClass]).filter(MyClass.id == 5)
+
+            result = query.with_session(my_session).one()
+
+        """
+
+        self.session = session
+        return self
+
+    def _legacy_from_self(
+        self, *entities: _ColumnsClauseArgument[Any]
+    ) -> Self:
+        # used for query.count() as well as for the same
+        # function in BakedQuery, as well as some old tests in test_baked.py.
+
+        fromclause = (
+            self.set_label_style(LABEL_STYLE_TABLENAME_PLUS_COL)
+            .correlate(None)
+            .subquery()
+            ._anonymous_fromclause()
+        )
+
+        q = self._from_selectable(fromclause)
+
+        if entities:
+            q._set_entities(entities)
+        return q
+
+    @_generative
+    def _set_enable_single_crit(self, val: bool) -> Self:
+        self._compile_options += {"_enable_single_crit": val}
+        return self
+
+    @_generative
+    def _from_selectable(
+        self, fromclause: FromClause, set_entity_from: bool = True
+    ) -> Self:
+        for attr in (
+            "_where_criteria",
+            "_order_by_clauses",
+            "_group_by_clauses",
+            "_limit_clause",
+            "_offset_clause",
+            "_last_joined_entity",
+            "_setup_joins",
+            "_memoized_select_entities",
+            "_distinct",
+            "_distinct_on",
+            "_having_criteria",
+            "_prefixes",
+            "_suffixes",
+        ):
+            self.__dict__.pop(attr, None)
+        self._set_select_from([fromclause], set_entity_from)
+        self._compile_options += {
+            "_enable_single_crit": False,
+        }
+
+        return self
+
+    @util.deprecated(
+        "1.4",
+        ":meth:`_query.Query.values` "
+        "is deprecated and will be removed in a "
+        "future release.  Please use :meth:`_query.Query.with_entities`",
+    )
+    def values(self, *columns: _ColumnsClauseArgument[Any]) -> Iterable[Any]:
+        """Return an iterator yielding result tuples corresponding
+        to the given list of columns
+
+        """
+        return self._values_no_warn(*columns)
+
+    _values = values
+
+    def _values_no_warn(
+        self, *columns: _ColumnsClauseArgument[Any]
+    ) -> Iterable[Any]:
+        if not columns:
+            return iter(())
+        q = self._clone().enable_eagerloads(False)
+        q._set_entities(columns)
+        if not q.load_options._yield_per:
+            q.load_options += {"_yield_per": 10}
+        return iter(q)
+
+    @util.deprecated(
+        "1.4",
+        ":meth:`_query.Query.value` "
+        "is deprecated and will be removed in a "
+        "future release.  Please use :meth:`_query.Query.with_entities` "
+        "in combination with :meth:`_query.Query.scalar`",
+    )
+    def value(self, column: _ColumnExpressionArgument[Any]) -> Any:
+        """Return a scalar result corresponding to the given
+        column expression.
+
+        """
+        try:
+            return next(self._values_no_warn(column))[0]  # type: ignore
+        except StopIteration:
+            return None
+
+    @overload
+    def with_entities(self, _entity: _EntityType[_O]) -> Query[_O]: ...
+
+    @overload
+    def with_entities(
+        self,
+        _colexpr: roles.TypedColumnsClauseRole[_T],
+    ) -> RowReturningQuery[Tuple[_T]]: ...
+
+    # START OVERLOADED FUNCTIONS self.with_entities RowReturningQuery 2-8
+
+    # code within this block is **programmatically,
+    # statically generated** by tools/generate_tuple_map_overloads.py
+
+    @overload
+    def with_entities(
+        self, __ent0: _TCCA[_T0], __ent1: _TCCA[_T1]
+    ) -> RowReturningQuery[Tuple[_T0, _T1]]: ...
+
+    @overload
+    def with_entities(
+        self, __ent0: _TCCA[_T0], __ent1: _TCCA[_T1], __ent2: _TCCA[_T2]
+    ) -> RowReturningQuery[Tuple[_T0, _T1, _T2]]: ...
+
+    @overload
+    def with_entities(
+        self,
+        __ent0: _TCCA[_T0],
+        __ent1: _TCCA[_T1],
+        __ent2: _TCCA[_T2],
+        __ent3: _TCCA[_T3],
+    ) -> RowReturningQuery[Tuple[_T0, _T1, _T2, _T3]]: ...
+
+    @overload
+    def with_entities(
+        self,
+        __ent0: _TCCA[_T0],
+        __ent1: _TCCA[_T1],
+        __ent2: _TCCA[_T2],
+        __ent3: _TCCA[_T3],
+        __ent4: _TCCA[_T4],
+    ) -> RowReturningQuery[Tuple[_T0, _T1, _T2, _T3, _T4]]: ...
+
+    @overload
+    def with_entities(
+        self,
+        __ent0: _TCCA[_T0],
+        __ent1: _TCCA[_T1],
+        __ent2: _TCCA[_T2],
+        __ent3: _TCCA[_T3],
+        __ent4: _TCCA[_T4],
+        __ent5: _TCCA[_T5],
+    ) -> RowReturningQuery[Tuple[_T0, _T1, _T2, _T3, _T4, _T5]]: ...
+
+    @overload
+    def with_entities(
+        self,
+        __ent0: _TCCA[_T0],
+        __ent1: _TCCA[_T1],
+        __ent2: _TCCA[_T2],
+        __ent3: _TCCA[_T3],
+        __ent4: _TCCA[_T4],
+        __ent5: _TCCA[_T5],
+        __ent6: _TCCA[_T6],
+    ) -> RowReturningQuery[Tuple[_T0, _T1, _T2, _T3, _T4, _T5, _T6]]: ...
+
+    @overload
+    def with_entities(
+        self,
+        __ent0: _TCCA[_T0],
+        __ent1: _TCCA[_T1],
+        __ent2: _TCCA[_T2],
+        __ent3: _TCCA[_T3],
+        __ent4: _TCCA[_T4],
+        __ent5: _TCCA[_T5],
+        __ent6: _TCCA[_T6],
+        __ent7: _TCCA[_T7],
+    ) -> RowReturningQuery[Tuple[_T0, _T1, _T2, _T3, _T4, _T5, _T6, _T7]]: ...
+
+    # END OVERLOADED FUNCTIONS self.with_entities
+
+    @overload
+    def with_entities(
+        self, *entities: _ColumnsClauseArgument[Any]
+    ) -> Query[Any]: ...
+
+    @_generative
+    def with_entities(
+        self, *entities: _ColumnsClauseArgument[Any], **__kw: Any
+    ) -> Query[Any]:
+        r"""Return a new :class:`_query.Query`
+        replacing the SELECT list with the
+        given entities.
+
+        e.g.::
+
+            # Users, filtered on some arbitrary criterion
+            # and then ordered by related email address
+            q = (
+                session.query(User)
+                .join(User.address)
+                .filter(User.name.like("%ed%"))
+                .order_by(Address.email)
+            )
+
+            # given *only* User.id==5, Address.email, and 'q', what
+            # would the *next* User in the result be ?
+            subq = (
+                q.with_entities(Address.email)
+                .order_by(None)
+                .filter(User.id == 5)
+                .subquery()
+            )
+            q = q.join((subq, subq.c.email < Address.email)).limit(1)
+
+        .. seealso::
+
+            :meth:`_sql.Select.with_only_columns` - v2 comparable method.
+        """
+        if __kw:
+            raise _no_kw()
+
+        # Query has all the same fields as Select for this operation
+        # this could in theory be based on a protocol but not sure if it's
+        # worth it
+        _MemoizedSelectEntities._generate_for_statement(self)  # type: ignore
+        self._set_entities(entities)
+        return self
+
+    @_generative
+    def add_columns(
+        self, *column: _ColumnExpressionArgument[Any]
+    ) -> Query[Any]:
+        """Add one or more column expressions to the list
+        of result columns to be returned.
+
+        .. seealso::
+
+            :meth:`_sql.Select.add_columns` - v2 comparable method.
+        """
+
+        self._raw_columns = list(self._raw_columns)
+
+        self._raw_columns.extend(
+            coercions.expect(
+                roles.ColumnsClauseRole,
+                c,
+                apply_propagate_attrs=self,
+                post_inspect=True,
+            )
+            for c in column
+        )
+        return self
+
+    @util.deprecated(
+        "1.4",
+        ":meth:`_query.Query.add_column` "
+        "is deprecated and will be removed in a "
+        "future release.  Please use :meth:`_query.Query.add_columns`",
+    )
+    def add_column(self, column: _ColumnExpressionArgument[Any]) -> Query[Any]:
+        """Add a column expression to the list of result columns to be
+        returned.
+
+        """
+        return self.add_columns(column)
+
+    @_generative
+    def options(self, *args: ExecutableOption) -> Self:
+        """Return a new :class:`_query.Query` object,
+        applying the given list of
+        mapper options.
+
+        Most supplied options regard changing how column- and
+        relationship-mapped attributes are loaded.
+
+        .. seealso::
+
+            :ref:`loading_columns`
+
+            :ref:`relationship_loader_options`
+
+        """
+
+        opts = tuple(util.flatten_iterator(args))
+        if self._compile_options._current_path:
+            # opting for lower method overhead for the checks
+            for opt in opts:
+                if not opt._is_core and opt._is_legacy_option:  # type: ignore
+                    opt.process_query_conditionally(self)  # type: ignore
+        else:
+            for opt in opts:
+                if not opt._is_core and opt._is_legacy_option:  # type: ignore
+                    opt.process_query(self)  # type: ignore
+
+        self._with_options += opts
+        return self
+
+    def with_transformation(
+        self, fn: Callable[[Query[Any]], Query[Any]]
+    ) -> Query[Any]:
+        """Return a new :class:`_query.Query` object transformed by
+        the given function.
+
+        E.g.::
+
+            def filter_something(criterion):
+                def transform(q):
+                    return q.filter(criterion)
+
+                return transform
+
+
+            q = q.with_transformation(filter_something(x == 5))
+
+        This allows ad-hoc recipes to be created for :class:`_query.Query`
+        objects.
+
+        """
+        return fn(self)
+
+    def get_execution_options(self) -> _ImmutableExecuteOptions:
+        """Get the non-SQL options which will take effect during execution.
+
+        .. versionadded:: 1.3
+
+        .. seealso::
+
+            :meth:`_query.Query.execution_options`
+
+            :meth:`_sql.Select.get_execution_options` - v2 comparable method.
+
+        """
+        return self._execution_options
+
+    @overload
+    def execution_options(
+        self,
+        *,
+        compiled_cache: Optional[CompiledCacheType] = ...,
+        logging_token: str = ...,
+        isolation_level: IsolationLevel = ...,
+        no_parameters: bool = False,
+        stream_results: bool = False,
+        max_row_buffer: int = ...,
+        yield_per: int = ...,
+        insertmanyvalues_page_size: int = ...,
+        schema_translate_map: Optional[SchemaTranslateMapType] = ...,
+        populate_existing: bool = False,
+        autoflush: bool = False,
+        preserve_rowcount: bool = False,
+        **opt: Any,
+    ) -> Self: ...
+
+    @overload
+    def execution_options(self, **opt: Any) -> Self: ...
+
+    @_generative
+    def execution_options(self, **kwargs: Any) -> Self:
+        """Set non-SQL options which take effect during execution.
+
+        Options allowed here include all of those accepted by
+        :meth:`_engine.Connection.execution_options`, as well as a series
+        of ORM specific options:
+
+        ``populate_existing=True`` - equivalent to using
+        :meth:`_orm.Query.populate_existing`
+
+        ``autoflush=True|False`` - equivalent to using
+        :meth:`_orm.Query.autoflush`
+
+        ``yield_per=<value>`` - equivalent to using
+        :meth:`_orm.Query.yield_per`
+
+        Note that the ``stream_results`` execution option is enabled
+        automatically if the :meth:`~sqlalchemy.orm.query.Query.yield_per()`
+        method or execution option is used.
+
+        .. versionadded:: 1.4 - added ORM options to
+           :meth:`_orm.Query.execution_options`
+
+        The execution options may also be specified on a per execution basis
+        when using :term:`2.0 style` queries via the
+        :paramref:`_orm.Session.execution_options` parameter.
+
+        .. warning:: The
+           :paramref:`_engine.Connection.execution_options.stream_results`
+           parameter should not be used at the level of individual ORM
+           statement executions, as the :class:`_orm.Session` will not track
+           objects from different schema translate maps within a single
+           session.  For multiple schema translate maps within the scope of a
+           single :class:`_orm.Session`, see :ref:`examples_sharding`.
+
+
+        .. seealso::
+
+            :ref:`engine_stream_results`
+
+            :meth:`_query.Query.get_execution_options`
+
+            :meth:`_sql.Select.execution_options` - v2 equivalent method.
+
+        """
+        self._execution_options = self._execution_options.union(kwargs)
+        return self
+
+    @_generative
+    def with_for_update(
+        self,
+        *,
+        nowait: bool = False,
+        read: bool = False,
+        of: Optional[_ForUpdateOfArgument] = None,
+        skip_locked: bool = False,
+        key_share: bool = False,
+    ) -> Self:
+        """return a new :class:`_query.Query`
+        with the specified options for the
+        ``FOR UPDATE`` clause.
+
+        The behavior of this method is identical to that of
+        :meth:`_expression.GenerativeSelect.with_for_update`.
+        When called with no arguments,
+        the resulting ``SELECT`` statement will have a ``FOR UPDATE`` clause
+        appended.  When additional arguments are specified, backend-specific
+        options such as ``FOR UPDATE NOWAIT`` or ``LOCK IN SHARE MODE``
+        can take effect.
+
+        E.g.::
+
+            q = (
+                sess.query(User)
+                .populate_existing()
+                .with_for_update(nowait=True, of=User)
+            )
+
+        The above query on a PostgreSQL backend will render like:
+
+        .. sourcecode:: sql
+
+            SELECT users.id AS users_id FROM users FOR UPDATE OF users NOWAIT
+
+        .. warning::
+
+            Using ``with_for_update`` in the context of eager loading
+            relationships is not officially supported or recommended by
+            SQLAlchemy and may not work with certain queries on various
+            database backends.  When ``with_for_update`` is successfully used
+            with a query that involves :func:`_orm.joinedload`, SQLAlchemy will
+            attempt to emit SQL that locks all involved tables.
+
+        .. note::  It is generally a good idea to combine the use of the
+           :meth:`_orm.Query.populate_existing` method when using the
+           :meth:`_orm.Query.with_for_update` method.   The purpose of
+           :meth:`_orm.Query.populate_existing` is to force all the data read
+           from the SELECT to be populated into the ORM objects returned,
+           even if these objects are already in the :term:`identity map`.
+
+        .. seealso::
+
+            :meth:`_expression.GenerativeSelect.with_for_update`
+            - Core level method with
+            full argument and behavioral description.
+
+            :meth:`_orm.Query.populate_existing` - overwrites attributes of
+            objects already loaded in the identity map.
+
+        """  # noqa: E501
+
+        self._for_update_arg = ForUpdateArg(
+            read=read,
+            nowait=nowait,
+            of=of,
+            skip_locked=skip_locked,
+            key_share=key_share,
+        )
+        return self
+
+    @_generative
+    def params(
+        self, __params: Optional[Dict[str, Any]] = None, **kw: Any
+    ) -> Self:
+        r"""Add values for bind parameters which may have been
+        specified in filter().
+
+        Parameters may be specified using \**kwargs, or optionally a single
+        dictionary as the first positional argument. The reason for both is
+        that \**kwargs is convenient, however some parameter dictionaries
+        contain unicode keys in which case \**kwargs cannot be used.
+
+        """
+        if __params:
+            kw.update(__params)
+        self._params = self._params.union(kw)
+        return self
+
+    def where(self, *criterion: _ColumnExpressionArgument[bool]) -> Self:
+        """A synonym for :meth:`.Query.filter`.
+
+        .. versionadded:: 1.4
+
+        .. seealso::
+
+            :meth:`_sql.Select.where` - v2 equivalent method.
+
+        """
+        return self.filter(*criterion)
+
+    @_generative
+    @_assertions(_no_statement_condition, _no_limit_offset)
+    def filter(self, *criterion: _ColumnExpressionArgument[bool]) -> Self:
+        r"""Apply the given filtering criterion to a copy
+        of this :class:`_query.Query`, using SQL expressions.
+
+        e.g.::
+
+            session.query(MyClass).filter(MyClass.name == "some name")
+
+        Multiple criteria may be specified as comma separated; the effect
+        is that they will be joined together using the :func:`.and_`
+        function::
+
+            session.query(MyClass).filter(MyClass.name == "some name", MyClass.id > 5)
+
+        The criterion is any SQL expression object applicable to the
+        WHERE clause of a select.   String expressions are coerced
+        into SQL expression constructs via the :func:`_expression.text`
+        construct.
+
+        .. seealso::
+
+            :meth:`_query.Query.filter_by` - filter on keyword expressions.
+
+            :meth:`_sql.Select.where` - v2 equivalent method.
+
+        """  # noqa: E501
+        for crit in list(criterion):
+            crit = coercions.expect(
+                roles.WhereHavingRole, crit, apply_propagate_attrs=self
+            )
+
+            self._where_criteria += (crit,)
+        return self
+
+    @util.memoized_property
+    def _last_joined_entity(
+        self,
+    ) -> Optional[Union[_InternalEntityType[Any], _JoinTargetElement]]:
+        if self._setup_joins:
+            return _determine_last_joined_entity(
+                self._setup_joins,
+            )
+        else:
+            return None
+
+    def _filter_by_zero(self) -> Any:
+        """for the filter_by() method, return the target entity for which
+        we will attempt to derive an expression from based on string name.
+
+        """
+
+        if self._setup_joins:
+            _last_joined_entity = self._last_joined_entity
+            if _last_joined_entity is not None:
+                return _last_joined_entity
+
+        # discussion related to #7239
+        # special check determines if we should try to derive attributes
+        # for filter_by() from the "from object", i.e., if the user
+        # called query.select_from(some selectable).filter_by(some_attr=value).
+        # We don't want to do that in the case that methods like
+        # from_self(), select_entity_from(), or a set op like union() were
+        # called; while these methods also place a
+        # selectable in the _from_obj collection, they also set up
+        # the _set_base_alias boolean which turns on the whole "adapt the
+        # entity to this selectable" thing, meaning the query still continues
+        # to construct itself in terms of the lead entity that was passed
+        # to query(), e.g. query(User).from_self() is still in terms of User,
+        # and not the subquery that from_self() created.   This feature of
+        # "implicitly adapt all occurrences of entity X to some arbitrary
+        # subquery" is the main thing I am trying to do away with in 2.0 as
+        # users should now used aliased() for that, but I can't entirely get
+        # rid of it due to query.union() and other set ops relying upon it.
+        #
+        # compare this to the base Select()._filter_by_zero() which can
+        # just return self._from_obj[0] if present, because there is no
+        # "_set_base_alias" feature.
+        #
+        # IOW, this conditional essentially detects if
+        # "select_from(some_selectable)" has been called, as opposed to
+        # "select_entity_from()", "from_self()"
+        # or "union() / some_set_op()".
+        if self._from_obj and not self._compile_options._set_base_alias:
+            return self._from_obj[0]
+
+        return self._raw_columns[0]
+
+    def filter_by(self, **kwargs: Any) -> Self:
+        r"""Apply the given filtering criterion to a copy
+        of this :class:`_query.Query`, using keyword expressions.
+
+        e.g.::
+
+            session.query(MyClass).filter_by(name="some name")
+
+        Multiple criteria may be specified as comma separated; the effect
+        is that they will be joined together using the :func:`.and_`
+        function::
+
+            session.query(MyClass).filter_by(name="some name", id=5)
+
+        The keyword expressions are extracted from the primary
+        entity of the query, or the last entity that was the
+        target of a call to :meth:`_query.Query.join`.
+
+        .. seealso::
+
+            :meth:`_query.Query.filter` - filter on SQL expressions.
+
+            :meth:`_sql.Select.filter_by` - v2 comparable method.
+
+        """
+        from_entity = self._filter_by_zero()
+
+        clauses = [
+            _entity_namespace_key(from_entity, key) == value
+            for key, value in kwargs.items()
+        ]
+        return self.filter(*clauses)
+
+    @_generative
+    def order_by(
+        self,
+        __first: Union[
+            Literal[None, False, _NoArg.NO_ARG],
+            _ColumnExpressionOrStrLabelArgument[Any],
+        ] = _NoArg.NO_ARG,
+        *clauses: _ColumnExpressionOrStrLabelArgument[Any],
+    ) -> Self:
+        """Apply one or more ORDER BY criteria to the query and return
+        the newly resulting :class:`_query.Query`.
+
+        e.g.::
+
+            q = session.query(Entity).order_by(Entity.id, Entity.name)
+
+        Calling this method multiple times is equivalent to calling it once
+        with all the clauses concatenated. All existing ORDER BY criteria may
+        be cancelled by passing ``None`` by itself.  New ORDER BY criteria may
+        then be added by invoking :meth:`_orm.Query.order_by` again, e.g.::
+
+            # will erase all ORDER BY and ORDER BY new_col alone
+            q = q.order_by(None).order_by(new_col)
+
+        .. seealso::
+
+            These sections describe ORDER BY in terms of :term:`2.0 style`
+            invocation but apply to :class:`_orm.Query` as well:
+
+            :ref:`tutorial_order_by` - in the :ref:`unified_tutorial`
+
+            :ref:`tutorial_order_by_label` - in the :ref:`unified_tutorial`
+
+            :meth:`_sql.Select.order_by` - v2 equivalent method.
+
+        """
+
+        for assertion in (self._no_statement_condition, self._no_limit_offset):
+            assertion("order_by")
+
+        if not clauses and (__first is None or __first is False):
+            self._order_by_clauses = ()
+        elif __first is not _NoArg.NO_ARG:
+            criterion = tuple(
+                coercions.expect(roles.OrderByRole, clause)
+                for clause in (__first,) + clauses
+            )
+            self._order_by_clauses += criterion
+
+        return self
+
+    @_generative
+    def group_by(
+        self,
+        __first: Union[
+            Literal[None, False, _NoArg.NO_ARG],
+            _ColumnExpressionOrStrLabelArgument[Any],
+        ] = _NoArg.NO_ARG,
+        *clauses: _ColumnExpressionOrStrLabelArgument[Any],
+    ) -> Self:
+        """Apply one or more GROUP BY criterion to the query and return
+        the newly resulting :class:`_query.Query`.
+
+        All existing GROUP BY settings can be suppressed by
+        passing ``None`` - this will suppress any GROUP BY configured
+        on mappers as well.
+
+        .. seealso::
+
+            These sections describe GROUP BY in terms of :term:`2.0 style`
+            invocation but apply to :class:`_orm.Query` as well:
+
+            :ref:`tutorial_group_by_w_aggregates` - in the
+            :ref:`unified_tutorial`
+
+            :ref:`tutorial_order_by_label` - in the :ref:`unified_tutorial`
+
+            :meth:`_sql.Select.group_by` - v2 equivalent method.
+
+        """
+
+        for assertion in (self._no_statement_condition, self._no_limit_offset):
+            assertion("group_by")
+
+        if not clauses and (__first is None or __first is False):
+            self._group_by_clauses = ()
+        elif __first is not _NoArg.NO_ARG:
+            criterion = tuple(
+                coercions.expect(roles.GroupByRole, clause)
+                for clause in (__first,) + clauses
+            )
+            self._group_by_clauses += criterion
+        return self
+
+    @_generative
+    @_assertions(_no_statement_condition, _no_limit_offset)
+    def having(self, *having: _ColumnExpressionArgument[bool]) -> Self:
+        r"""Apply a HAVING criterion to the query and return the
+        newly resulting :class:`_query.Query`.
+
+        :meth:`_query.Query.having` is used in conjunction with
+        :meth:`_query.Query.group_by`.
+
+        HAVING criterion makes it possible to use filters on aggregate
+        functions like COUNT, SUM, AVG, MAX, and MIN, eg.::
+
+            q = (
+                session.query(User.id)
+                .join(User.addresses)
+                .group_by(User.id)
+                .having(func.count(Address.id) > 2)
+            )
+
+        .. seealso::
+
+            :meth:`_sql.Select.having` - v2 equivalent method.
+
+        """
+
+        for criterion in having:
+            having_criteria = coercions.expect(
+                roles.WhereHavingRole, criterion
+            )
+            self._having_criteria += (having_criteria,)
+        return self
+
+    def _set_op(self, expr_fn: Any, *q: Query[Any]) -> Self:
+        list_of_queries = (self,) + q
+        return self._from_selectable(expr_fn(*(list_of_queries)).subquery())
+
+    def union(self, *q: Query[Any]) -> Self:
+        """Produce a UNION of this Query against one or more queries.
+
+        e.g.::
+
+            q1 = sess.query(SomeClass).filter(SomeClass.foo == "bar")
+            q2 = sess.query(SomeClass).filter(SomeClass.bar == "foo")
+
+            q3 = q1.union(q2)
+
+        The method accepts multiple Query objects so as to control
+        the level of nesting.  A series of ``union()`` calls such as::
+
+            x.union(y).union(z).all()
+
+        will nest on each ``union()``, and produces:
+
+        .. sourcecode:: sql
+
+            SELECT * FROM (SELECT * FROM (SELECT * FROM X UNION
+                            SELECT * FROM y) UNION SELECT * FROM Z)
+
+        Whereas::
+
+            x.union(y, z).all()
+
+        produces:
+
+        .. sourcecode:: sql
+
+            SELECT * FROM (SELECT * FROM X UNION SELECT * FROM y UNION
+                            SELECT * FROM Z)
+
+        Note that many database backends do not allow ORDER BY to
+        be rendered on a query called within UNION, EXCEPT, etc.
+        To disable all ORDER BY clauses including those configured
+        on mappers, issue ``query.order_by(None)`` - the resulting
+        :class:`_query.Query` object will not render ORDER BY within
+        its SELECT statement.
+
+        .. seealso::
+
+            :meth:`_sql.Select.union` - v2 equivalent method.
+
+        """
+        return self._set_op(expression.union, *q)
+
+    def union_all(self, *q: Query[Any]) -> Self:
+        """Produce a UNION ALL of this Query against one or more queries.
+
+        Works the same way as :meth:`~sqlalchemy.orm.query.Query.union`. See
+        that method for usage examples.
+
+        .. seealso::
+
+            :meth:`_sql.Select.union_all` - v2 equivalent method.
+
+        """
+        return self._set_op(expression.union_all, *q)
+
+    def intersect(self, *q: Query[Any]) -> Self:
+        """Produce an INTERSECT of this Query against one or more queries.
+
+        Works the same way as :meth:`~sqlalchemy.orm.query.Query.union`. See
+        that method for usage examples.
+
+        .. seealso::
+
+            :meth:`_sql.Select.intersect` - v2 equivalent method.
+
+        """
+        return self._set_op(expression.intersect, *q)
+
+    def intersect_all(self, *q: Query[Any]) -> Self:
+        """Produce an INTERSECT ALL of this Query against one or more queries.
+
+        Works the same way as :meth:`~sqlalchemy.orm.query.Query.union`. See
+        that method for usage examples.
+
+        .. seealso::
+
+            :meth:`_sql.Select.intersect_all` - v2 equivalent method.
+
+        """
+        return self._set_op(expression.intersect_all, *q)
+
+    def except_(self, *q: Query[Any]) -> Self:
+        """Produce an EXCEPT of this Query against one or more queries.
+
+        Works the same way as :meth:`~sqlalchemy.orm.query.Query.union`. See
+        that method for usage examples.
+
+        .. seealso::
+
+            :meth:`_sql.Select.except_` - v2 equivalent method.
+
+        """
+        return self._set_op(expression.except_, *q)
+
+    def except_all(self, *q: Query[Any]) -> Self:
+        """Produce an EXCEPT ALL of this Query against one or more queries.
+
+        Works the same way as :meth:`~sqlalchemy.orm.query.Query.union`. See
+        that method for usage examples.
+
+        .. seealso::
+
+            :meth:`_sql.Select.except_all` - v2 equivalent method.
+
+        """
+        return self._set_op(expression.except_all, *q)
+
+    @_generative
+    @_assertions(_no_statement_condition, _no_limit_offset)
+    def join(
+        self,
+        target: _JoinTargetArgument,
+        onclause: Optional[_OnClauseArgument] = None,
+        *,
+        isouter: bool = False,
+        full: bool = False,
+    ) -> Self:
+        r"""Create a SQL JOIN against this :class:`_query.Query`
+        object's criterion
+        and apply generatively, returning the newly resulting
+        :class:`_query.Query`.
+
+        **Simple Relationship Joins**
+
+        Consider a mapping between two classes ``User`` and ``Address``,
+        with a relationship ``User.addresses`` representing a collection
+        of ``Address`` objects associated with each ``User``.   The most
+        common usage of :meth:`_query.Query.join`
+        is to create a JOIN along this
+        relationship, using the ``User.addresses`` attribute as an indicator
+        for how this should occur::
+
+            q = session.query(User).join(User.addresses)
+
+        Where above, the call to :meth:`_query.Query.join` along
+        ``User.addresses`` will result in SQL approximately equivalent to:
+
+        .. sourcecode:: sql
+
+            SELECT user.id, user.name
+            FROM user JOIN address ON user.id = address.user_id
+
+        In the above example we refer to ``User.addresses`` as passed to
+        :meth:`_query.Query.join` as the "on clause", that is, it indicates
+        how the "ON" portion of the JOIN should be constructed.
+
+        To construct a chain of joins, multiple :meth:`_query.Query.join`
+        calls may be used.  The relationship-bound attribute implies both
+        the left and right side of the join at once::
+
+            q = (
+                session.query(User)
+                .join(User.orders)
+                .join(Order.items)
+                .join(Item.keywords)
+            )
+
+        .. note:: as seen in the above example, **the order in which each
+           call to the join() method occurs is important**.    Query would not,
+           for example, know how to join correctly if we were to specify
+           ``User``, then ``Item``, then ``Order``, in our chain of joins; in
+           such a case, depending on the arguments passed, it may raise an
+           error that it doesn't know how to join, or it may produce invalid
+           SQL in which case the database will raise an error. In correct
+           practice, the
+           :meth:`_query.Query.join` method is invoked in such a way that lines
+           up with how we would want the JOIN clauses in SQL to be
+           rendered, and each call should represent a clear link from what
+           precedes it.
+
+        **Joins to a Target Entity or Selectable**
+
+        A second form of :meth:`_query.Query.join` allows any mapped entity or
+        core selectable construct as a target.   In this usage,
+        :meth:`_query.Query.join` will attempt to create a JOIN along the
+        natural foreign key relationship between two entities::
+
+            q = session.query(User).join(Address)
+
+        In the above calling form, :meth:`_query.Query.join` is called upon to
+        create the "on clause" automatically for us.  This calling form will
+        ultimately raise an error if either there are no foreign keys between
+        the two entities, or if there are multiple foreign key linkages between
+        the target entity and the entity or entities already present on the
+        left side such that creating a join requires more information.  Note
+        that when indicating a join to a target without any ON clause, ORM
+        configured relationships are not taken into account.
+
+        **Joins to a Target with an ON Clause**
+
+        The third calling form allows both the target entity as well
+        as the ON clause to be passed explicitly.    A example that includes
+        a SQL expression as the ON clause is as follows::
+
+            q = session.query(User).join(Address, User.id == Address.user_id)
+
+        The above form may also use a relationship-bound attribute as the
+        ON clause as well::
+
+            q = session.query(User).join(Address, User.addresses)
+
+        The above syntax can be useful for the case where we wish
+        to join to an alias of a particular target entity.  If we wanted
+        to join to ``Address`` twice, it could be achieved using two
+        aliases set up using the :func:`~sqlalchemy.orm.aliased` function::
+
+            a1 = aliased(Address)
+            a2 = aliased(Address)
+
+            q = (
+                session.query(User)
+                .join(a1, User.addresses)
+                .join(a2, User.addresses)
+                .filter(a1.email_address == "ed@foo.com")
+                .filter(a2.email_address == "ed@bar.com")
+            )
+
+        The relationship-bound calling form can also specify a target entity
+        using the :meth:`_orm.PropComparator.of_type` method; a query
+        equivalent to the one above would be::
+
+            a1 = aliased(Address)
+            a2 = aliased(Address)
+
+            q = (
+                session.query(User)
+                .join(User.addresses.of_type(a1))
+                .join(User.addresses.of_type(a2))
+                .filter(a1.email_address == "ed@foo.com")
+                .filter(a2.email_address == "ed@bar.com")
+            )
+
+        **Augmenting Built-in ON Clauses**
+
+        As a substitute for providing a full custom ON condition for an
+        existing relationship, the :meth:`_orm.PropComparator.and_` function
+        may be applied to a relationship attribute to augment additional
+        criteria into the ON clause; the additional criteria will be combined
+        with the default criteria using AND::
+
+            q = session.query(User).join(
+                User.addresses.and_(Address.email_address != "foo@bar.com")
+            )
+
+        .. versionadded:: 1.4
+
+        **Joining to Tables and Subqueries**
+
+
+        The target of a join may also be any table or SELECT statement,
+        which may be related to a target entity or not.   Use the
+        appropriate ``.subquery()`` method in order to make a subquery
+        out of a query::
+
+            subq = (
+                session.query(Address)
+                .filter(Address.email_address == "ed@foo.com")
+                .subquery()
+            )
+
+
+            q = session.query(User).join(subq, User.id == subq.c.user_id)
+
+        Joining to a subquery in terms of a specific relationship and/or
+        target entity may be achieved by linking the subquery to the
+        entity using :func:`_orm.aliased`::
+
+            subq = (
+                session.query(Address)
+                .filter(Address.email_address == "ed@foo.com")
+                .subquery()
+            )
+
+            address_subq = aliased(Address, subq)
+
+            q = session.query(User).join(User.addresses.of_type(address_subq))
+
+        **Controlling what to Join From**
+
+        In cases where the left side of the current state of
+        :class:`_query.Query` is not in line with what we want to join from,
+        the :meth:`_query.Query.select_from` method may be used::
+
+            q = (
+                session.query(Address)
+                .select_from(User)
+                .join(User.addresses)
+                .filter(User.name == "ed")
+            )
+
+        Which will produce SQL similar to:
+
+        .. sourcecode:: sql
+
+            SELECT address.* FROM user
+                JOIN address ON user.id=address.user_id
+                WHERE user.name = :name_1
+
+        .. seealso::
+
+            :meth:`_sql.Select.join` - v2 equivalent method.
+
+        :param \*props: Incoming arguments for :meth:`_query.Query.join`,
+         the props collection in modern use should be considered to be a  one
+         or two argument form, either as a single "target" entity or ORM
+         attribute-bound relationship, or as a target entity plus an "on
+         clause" which  may be a SQL expression or ORM attribute-bound
+         relationship.
+
+        :param isouter=False: If True, the join used will be a left outer join,
+         just as if the :meth:`_query.Query.outerjoin` method were called.
+
+        :param full=False: render FULL OUTER JOIN; implies ``isouter``.
+
+        """
+
+        join_target = coercions.expect(
+            roles.JoinTargetRole,
+            target,
+            apply_propagate_attrs=self,
+            legacy=True,
+        )
+        if onclause is not None:
+            onclause_element = coercions.expect(
+                roles.OnClauseRole, onclause, legacy=True
+            )
+        else:
+            onclause_element = None
+
+        self._setup_joins += (
+            (
+                join_target,
+                onclause_element,
+                None,
+                {
+                    "isouter": isouter,
+                    "full": full,
+                },
+            ),
+        )
+
+        self.__dict__.pop("_last_joined_entity", None)
+        return self
+
+    def outerjoin(
+        self,
+        target: _JoinTargetArgument,
+        onclause: Optional[_OnClauseArgument] = None,
+        *,
+        full: bool = False,
+    ) -> Self:
+        """Create a left outer join against this ``Query`` object's criterion
+        and apply generatively, returning the newly resulting ``Query``.
+
+        Usage is the same as the ``join()`` method.
+
+        .. seealso::
+
+            :meth:`_sql.Select.outerjoin` - v2 equivalent method.
+
+        """
+        return self.join(target, onclause=onclause, isouter=True, full=full)
+
+    @_generative
+    @_assertions(_no_statement_condition)
+    def reset_joinpoint(self) -> Self:
+        """Return a new :class:`.Query`, where the "join point" has
+        been reset back to the base FROM entities of the query.
+
+        This method is usually used in conjunction with the
+        ``aliased=True`` feature of the :meth:`~.Query.join`
+        method.  See the example in :meth:`~.Query.join` for how
+        this is used.
+
+        """
+        self._last_joined_entity = None
+
+        return self
+
+    @_generative
+    @_assertions(_no_clauseelement_condition)
+    def select_from(self, *from_obj: _FromClauseArgument) -> Self:
+        r"""Set the FROM clause of this :class:`.Query` explicitly.
+
+        :meth:`.Query.select_from` is often used in conjunction with
+        :meth:`.Query.join` in order to control which entity is selected
+        from on the "left" side of the join.
+
+        The entity or selectable object here effectively replaces the
+        "left edge" of any calls to :meth:`~.Query.join`, when no
+        joinpoint is otherwise established - usually, the default "join
+        point" is the leftmost entity in the :class:`~.Query` object's
+        list of entities to be selected.
+
+        A typical example::
+
+            q = (
+                session.query(Address)
+                .select_from(User)
+                .join(User.addresses)
+                .filter(User.name == "ed")
+            )
+
+        Which produces SQL equivalent to:
+
+        .. sourcecode:: sql
+
+            SELECT address.* FROM user
+            JOIN address ON user.id=address.user_id
+            WHERE user.name = :name_1
+
+        :param \*from_obj: collection of one or more entities to apply
+         to the FROM clause.  Entities can be mapped classes,
+         :class:`.AliasedClass` objects, :class:`.Mapper` objects
+         as well as core :class:`.FromClause` elements like subqueries.
+
+        .. seealso::
+
+            :meth:`~.Query.join`
+
+            :meth:`.Query.select_entity_from`
+
+            :meth:`_sql.Select.select_from` - v2 equivalent method.
+
+        """
+
+        self._set_select_from(from_obj, False)
+        return self
+
+    def __getitem__(self, item: Any) -> Any:
+        return orm_util._getitem(
+            self,
+            item,
+        )
+
+    @_generative
+    @_assertions(_no_statement_condition)
+    def slice(
+        self,
+        start: int,
+        stop: int,
+    ) -> Self:
+        """Computes the "slice" of the :class:`_query.Query` represented by
+        the given indices and returns the resulting :class:`_query.Query`.
+
+        The start and stop indices behave like the argument to Python's
+        built-in :func:`range` function. This method provides an
+        alternative to using ``LIMIT``/``OFFSET`` to get a slice of the
+        query.
+
+        For example, ::
+
+            session.query(User).order_by(User.id).slice(1, 3)
+
+        renders as
+
+        .. sourcecode:: sql
+
+           SELECT users.id AS users_id,
+                  users.name AS users_name
+           FROM users ORDER BY users.id
+           LIMIT ? OFFSET ?
+           (2, 1)
+
+        .. seealso::
+
+           :meth:`_query.Query.limit`
+
+           :meth:`_query.Query.offset`
+
+           :meth:`_sql.Select.slice` - v2 equivalent method.
+
+        """
+
+        self._limit_clause, self._offset_clause = sql_util._make_slice(
+            self._limit_clause, self._offset_clause, start, stop
+        )
+        return self
+
+    @_generative
+    @_assertions(_no_statement_condition)
+    def limit(self, limit: _LimitOffsetType) -> Self:
+        """Apply a ``LIMIT`` to the query and return the newly resulting
+        ``Query``.
+
+        .. seealso::
+
+            :meth:`_sql.Select.limit` - v2 equivalent method.
+
+        """
+        self._limit_clause = sql_util._offset_or_limit_clause(limit)
+        return self
+
+    @_generative
+    @_assertions(_no_statement_condition)
+    def offset(self, offset: _LimitOffsetType) -> Self:
+        """Apply an ``OFFSET`` to the query and return the newly resulting
+        ``Query``.
+
+        .. seealso::
+
+            :meth:`_sql.Select.offset` - v2 equivalent method.
+        """
+        self._offset_clause = sql_util._offset_or_limit_clause(offset)
+        return self
+
+    @_generative
+    @_assertions(_no_statement_condition)
+    def distinct(self, *expr: _ColumnExpressionArgument[Any]) -> Self:
+        r"""Apply a ``DISTINCT`` to the query and return the newly resulting
+        ``Query``.
+
+
+        .. note::
+
+            The ORM-level :meth:`.distinct` call includes logic that will
+            automatically add columns from the ORDER BY of the query to the
+            columns clause of the SELECT statement, to satisfy the common need
+            of the database backend that ORDER BY columns be part of the SELECT
+            list when DISTINCT is used.   These columns *are not* added to the
+            list of columns actually fetched by the :class:`_query.Query`,
+            however,
+            so would not affect results. The columns are passed through when
+            using the :attr:`_query.Query.statement` accessor, however.
+
+            .. deprecated:: 2.0  This logic is deprecated and will be removed
+               in SQLAlchemy 2.0.     See :ref:`migration_20_query_distinct`
+               for a description of this use case in 2.0.
+
+        .. seealso::
+
+            :meth:`_sql.Select.distinct` - v2 equivalent method.
+
+        :param \*expr: optional column expressions.  When present,
+         the PostgreSQL dialect will render a ``DISTINCT ON (<expressions>)``
+         construct.
+
+         .. deprecated:: 1.4 Using \*expr in other dialects is deprecated
+            and will raise :class:`_exc.CompileError` in a future version.
+
+        """
+        if expr:
+            self._distinct = True
+            self._distinct_on = self._distinct_on + tuple(
+                coercions.expect(roles.ByOfRole, e) for e in expr
+            )
+        else:
+            self._distinct = True
+        return self
+
+    def all(self) -> List[_T]:
+        """Return the results represented by this :class:`_query.Query`
+        as a list.
+
+        This results in an execution of the underlying SQL statement.
+
+        .. warning::  The :class:`_query.Query` object,
+           when asked to return either
+           a sequence or iterator that consists of full ORM-mapped entities,
+           will **deduplicate entries based on primary key**.  See the FAQ for
+           more details.
+
+            .. seealso::
+
+                :ref:`faq_query_deduplicating`
+
+        .. seealso::
+
+            :meth:`_engine.Result.all` - v2 comparable method.
+
+            :meth:`_engine.Result.scalars` - v2 comparable method.
+        """
+        return self._iter().all()  # type: ignore
+
+    @_generative
+    @_assertions(_no_clauseelement_condition)
+    def from_statement(self, statement: ExecutableReturnsRows) -> Self:
+        """Execute the given SELECT statement and return results.
+
+        This method bypasses all internal statement compilation, and the
+        statement is executed without modification.
+
+        The statement is typically either a :func:`_expression.text`
+        or :func:`_expression.select` construct, and should return the set
+        of columns
+        appropriate to the entity class represented by this
+        :class:`_query.Query`.
+
+        .. seealso::
+
+            :meth:`_sql.Select.from_statement` - v2 comparable method.
+
+        """
+        statement = coercions.expect(
+            roles.SelectStatementRole, statement, apply_propagate_attrs=self
+        )
+        self._statement = statement
+        return self
+
+    def first(self) -> Optional[_T]:
+        """Return the first result of this ``Query`` or
+        None if the result doesn't contain any row.
+
+        first() applies a limit of one within the generated SQL, so that
+        only one primary entity row is generated on the server side
+        (note this may consist of multiple result rows if join-loaded
+        collections are present).
+
+        Calling :meth:`_query.Query.first`
+        results in an execution of the underlying
+        query.
+
+        .. seealso::
+
+            :meth:`_query.Query.one`
+
+            :meth:`_query.Query.one_or_none`
+
+            :meth:`_engine.Result.first` - v2 comparable method.
+
+            :meth:`_engine.Result.scalars` - v2 comparable method.
+
+        """
+        # replicates limit(1) behavior
+        if self._statement is not None:
+            return self._iter().first()  # type: ignore
+        else:
+            return self.limit(1)._iter().first()  # type: ignore
+
+    def one_or_none(self) -> Optional[_T]:
+        """Return at most one result or raise an exception.
+
+        Returns ``None`` if the query selects
+        no rows.  Raises ``sqlalchemy.orm.exc.MultipleResultsFound``
+        if multiple object identities are returned, or if multiple
+        rows are returned for a query that returns only scalar values
+        as opposed to full identity-mapped entities.
+
+        Calling :meth:`_query.Query.one_or_none`
+        results in an execution of the
+        underlying query.
+
+        .. seealso::
+
+            :meth:`_query.Query.first`
+
+            :meth:`_query.Query.one`
+
+            :meth:`_engine.Result.one_or_none` - v2 comparable method.
+
+            :meth:`_engine.Result.scalar_one_or_none` - v2 comparable method.
+
+        """
+        return self._iter().one_or_none()  # type: ignore
+
+    def one(self) -> _T:
+        """Return exactly one result or raise an exception.
+
+        Raises ``sqlalchemy.orm.exc.NoResultFound`` if the query selects
+        no rows.  Raises ``sqlalchemy.orm.exc.MultipleResultsFound``
+        if multiple object identities are returned, or if multiple
+        rows are returned for a query that returns only scalar values
+        as opposed to full identity-mapped entities.
+
+        Calling :meth:`.one` results in an execution of the underlying query.
+
+        .. seealso::
+
+            :meth:`_query.Query.first`
+
+            :meth:`_query.Query.one_or_none`
+
+            :meth:`_engine.Result.one` - v2 comparable method.
+
+            :meth:`_engine.Result.scalar_one` - v2 comparable method.
+
+        """
+        return self._iter().one()  # type: ignore
+
+    def scalar(self) -> Any:
+        """Return the first element of the first result or None
+        if no rows present.  If multiple rows are returned,
+        raises MultipleResultsFound.
+
+          >>> session.query(Item).scalar()
+          <Item>
+          >>> session.query(Item.id).scalar()
+          1
+          >>> session.query(Item.id).filter(Item.id < 0).scalar()
+          None
+          >>> session.query(Item.id, Item.name).scalar()
+          1
+          >>> session.query(func.count(Parent.id)).scalar()
+          20
+
+        This results in an execution of the underlying query.
+
+        .. seealso::
+
+            :meth:`_engine.Result.scalar` - v2 comparable method.
+
+        """
+        # TODO: not sure why we can't use result.scalar() here
+        try:
+            ret = self.one()
+            if not isinstance(ret, collections_abc.Sequence):
+                return ret
+            return ret[0]
+        except sa_exc.NoResultFound:
+            return None
+
+    def __iter__(self) -> Iterator[_T]:
+        result = self._iter()
+        try:
+            yield from result  # type: ignore
+        except GeneratorExit:
+            # issue #8710 - direct iteration is not re-usable after
+            # an iterable block is broken, so close the result
+            result._soft_close()
+            raise
+
+    def _iter(self) -> Union[ScalarResult[_T], Result[_T]]:
+        # new style execution.
+        params = self._params
+
+        statement = self._statement_20()
+        result: Union[ScalarResult[_T], Result[_T]] = self.session.execute(
+            statement,
+            params,
+            execution_options={"_sa_orm_load_options": self.load_options},
+        )
+
+        # legacy: automatically set scalars, unique
+        if result._attributes.get("is_single_entity", False):
+            result = cast("Result[_T]", result).scalars()
+
+        if (
+            result._attributes.get("filtered", False)
+            and not self.load_options._yield_per
+        ):
+            result = result.unique()
+
+        return result
+
+    def __str__(self) -> str:
+        statement = self._statement_20()
+
+        try:
+            bind = (
+                self._get_bind_args(statement, self.session.get_bind)
+                if self.session
+                else None
+            )
+        except sa_exc.UnboundExecutionError:
+            bind = None
+
+        return str(statement.compile(bind))
+
+    def _get_bind_args(self, statement: Any, fn: Any, **kw: Any) -> Any:
+        return fn(clause=statement, **kw)
+
+    @property
+    def column_descriptions(self) -> List[ORMColumnDescription]:
+        """Return metadata about the columns which would be
+        returned by this :class:`_query.Query`.
+
+        Format is a list of dictionaries::
+
+            user_alias = aliased(User, name="user2")
+            q = sess.query(User, User.id, user_alias)
+
+            # this expression:
+            q.column_descriptions
+
+            # would return:
+            [
+                {
+                    "name": "User",
+                    "type": User,
+                    "aliased": False,
+                    "expr": User,
+                    "entity": User,
+                },
+                {
+                    "name": "id",
+                    "type": Integer(),
+                    "aliased": False,
+                    "expr": User.id,
+                    "entity": User,
+                },
+                {
+                    "name": "user2",
+                    "type": User,
+                    "aliased": True,
+                    "expr": user_alias,
+                    "entity": user_alias,
+                },
+            ]
+
+        .. seealso::
+
+            This API is available using :term:`2.0 style` queries as well,
+            documented at:
+
+            * :ref:`queryguide_inspection`
+
+            * :attr:`.Select.column_descriptions`
+
+        """
+
+        return _column_descriptions(self, legacy=True)
+
+    @util.deprecated(
+        "2.0",
+        "The :meth:`_orm.Query.instances` method is deprecated and will "
+        "be removed in a future release. "
+        "Use the Select.from_statement() method or aliased() construct in "
+        "conjunction with Session.execute() instead.",
+    )
+    def instances(
+        self,
+        result_proxy: CursorResult[Any],
+        context: Optional[QueryContext] = None,
+    ) -> Any:
+        """Return an ORM result given a :class:`_engine.CursorResult` and
+        :class:`.QueryContext`.
+
+        """
+        if context is None:
+            util.warn_deprecated(
+                "Using the Query.instances() method without a context "
+                "is deprecated and will be disallowed in a future release.  "
+                "Please make use of :meth:`_query.Query.from_statement` "
+                "for linking ORM results to arbitrary select constructs.",
+                version="1.4",
+            )
+            compile_state = self._compile_state(for_statement=False)
+
+            context = QueryContext(
+                compile_state,
+                compile_state.statement,
+                compile_state.statement,
+                self._params,
+                self.session,
+                self.load_options,
+            )
+
+        result = loading.instances(result_proxy, context)
+
+        # legacy: automatically set scalars, unique
+        if result._attributes.get("is_single_entity", False):
+            result = result.scalars()  # type: ignore
+
+        if result._attributes.get("filtered", False):
+            result = result.unique()
+
+        # TODO: isn't this supposed to be a list?
+        return result
+
+    @util.became_legacy_20(
+        ":meth:`_orm.Query.merge_result`",
+        alternative="The method is superseded by the "
+        ":func:`_orm.merge_frozen_result` function.",
+        enable_warnings=False,  # warnings occur via loading.merge_result
+    )
+    def merge_result(
+        self,
+        iterator: Union[
+            FrozenResult[Any], Iterable[Sequence[Any]], Iterable[object]
+        ],
+        load: bool = True,
+    ) -> Union[FrozenResult[Any], Iterable[Any]]:
+        """Merge a result into this :class:`_query.Query` object's Session.
+
+        Given an iterator returned by a :class:`_query.Query`
+        of the same structure
+        as this one, return an identical iterator of results, with all mapped
+        instances merged into the session using :meth:`.Session.merge`. This
+        is an optimized method which will merge all mapped instances,
+        preserving the structure of the result rows and unmapped columns with
+        less method overhead than that of calling :meth:`.Session.merge`
+        explicitly for each value.
+
+        The structure of the results is determined based on the column list of
+        this :class:`_query.Query` - if these do not correspond,
+        unchecked errors
+        will occur.
+
+        The 'load' argument is the same as that of :meth:`.Session.merge`.
+
+        For an example of how :meth:`_query.Query.merge_result` is used, see
+        the source code for the example :ref:`examples_caching`, where
+        :meth:`_query.Query.merge_result` is used to efficiently restore state
+        from a cache back into a target :class:`.Session`.
+
+        """
+
+        return loading.merge_result(self, iterator, load)
+
+    def exists(self) -> Exists:
+        """A convenience method that turns a query into an EXISTS subquery
+        of the form EXISTS (SELECT 1 FROM ... WHERE ...).
+
+        e.g.::
+
+            q = session.query(User).filter(User.name == "fred")
+            session.query(q.exists())
+
+        Producing SQL similar to:
+
+        .. sourcecode:: sql
+
+            SELECT EXISTS (
+                SELECT 1 FROM users WHERE users.name = :name_1
+            ) AS anon_1
+
+        The EXISTS construct is usually used in the WHERE clause::
+
+            session.query(User.id).filter(q.exists()).scalar()
+
+        Note that some databases such as SQL Server don't allow an
+        EXISTS expression to be present in the columns clause of a
+        SELECT.    To select a simple boolean value based on the exists
+        as a WHERE, use :func:`.literal`::
+
+            from sqlalchemy import literal
+
+            session.query(literal(True)).filter(q.exists()).scalar()
+
+        .. seealso::
+
+            :meth:`_sql.Select.exists` - v2 comparable method.
+
+        """
+
+        # .add_columns() for the case that we are a query().select_from(X),
+        # so that ".statement" can be produced (#2995) but also without
+        # omitting the FROM clause from a query(X) (#2818);
+        # .with_only_columns() after we have a core select() so that
+        # we get just "SELECT 1" without any entities.
+
+        inner = (
+            self.enable_eagerloads(False)
+            .add_columns(sql.literal_column("1"))
+            .set_label_style(LABEL_STYLE_TABLENAME_PLUS_COL)
+            ._get_select_statement_only()
+            .with_only_columns(1)
+        )
+
+        ezero = self._entity_from_pre_ent_zero()
+        if ezero is not None:
+            inner = inner.select_from(ezero)
+
+        return sql.exists(inner)
+
+    def count(self) -> int:
+        r"""Return a count of rows this the SQL formed by this :class:`Query`
+        would return.
+
+        This generates the SQL for this Query as follows:
+
+        .. sourcecode:: sql
+
+            SELECT count(1) AS count_1 FROM (
+                SELECT <rest of query follows...>
+            ) AS anon_1
+
+        The above SQL returns a single row, which is the aggregate value
+        of the count function; the :meth:`_query.Query.count`
+        method then returns
+        that single integer value.
+
+        .. warning::
+
+            It is important to note that the value returned by
+            count() is **not the same as the number of ORM objects that this
+            Query would return from a method such as the .all() method**.
+            The :class:`_query.Query` object,
+            when asked to return full entities,
+            will **deduplicate entries based on primary key**, meaning if the
+            same primary key value would appear in the results more than once,
+            only one object of that primary key would be present.  This does
+            not apply to a query that is against individual columns.
+
+            .. seealso::
+
+                :ref:`faq_query_deduplicating`
+
+        For fine grained control over specific columns to count, to skip the
+        usage of a subquery or otherwise control of the FROM clause, or to use
+        other aggregate functions, use :attr:`~sqlalchemy.sql.expression.func`
+        expressions in conjunction with :meth:`~.Session.query`, i.e.::
+
+            from sqlalchemy import func
+
+            # count User records, without
+            # using a subquery.
+            session.query(func.count(User.id))
+
+            # return count of user "id" grouped
+            # by "name"
+            session.query(func.count(User.id)).group_by(User.name)
+
+            from sqlalchemy import distinct
+
+            # count distinct "name" values
+            session.query(func.count(distinct(User.name)))
+
+        .. seealso::
+
+            :ref:`migration_20_query_usage`
+
+        """
+        col = sql.func.count(sql.literal_column("*"))
+        return (  # type: ignore
+            self._legacy_from_self(col).enable_eagerloads(False).scalar()
+        )
+
+    def delete(
+        self,
+        synchronize_session: SynchronizeSessionArgument = "auto",
+        delete_args: Optional[Dict[Any, Any]] = None,
+    ) -> int:
+        r"""Perform a DELETE with an arbitrary WHERE clause.
+
+        Deletes rows matched by this query from the database.
+
+        E.g.::
+
+            sess.query(User).filter(User.age == 25).delete(synchronize_session=False)
+
+            sess.query(User).filter(User.age == 25).delete(
+                synchronize_session="evaluate"
+            )
+
+        .. warning::
+
+            See the section :ref:`orm_expression_update_delete` for important
+            caveats and warnings, including limitations when using bulk UPDATE
+            and DELETE with mapper inheritance configurations.
+
+        :param synchronize_session: chooses the strategy to update the
+         attributes on objects in the session.   See the section
+         :ref:`orm_expression_update_delete` for a discussion of these
+         strategies.
+
+        :param delete_args: Optional dictionary, if present will be passed
+         to the underlying :func:`_expression.delete` construct as the ``**kw``
+         for the object.  May be used to pass dialect-specific arguments such
+         as ``mysql_limit``.
+
+         .. versionadded:: 2.0.37
+
+        :return: the count of rows matched as returned by the database's
+          "row count" feature.
+
+        .. seealso::
+
+            :ref:`orm_expression_update_delete`
+
+        """  # noqa: E501
+
+        bulk_del = BulkDelete(self, delete_args)
+        if self.dispatch.before_compile_delete:
+            for fn in self.dispatch.before_compile_delete:
+                new_query = fn(bulk_del.query, bulk_del)
+                if new_query is not None:
+                    bulk_del.query = new_query
+
+                self = bulk_del.query
+
+        delete_ = sql.delete(*self._raw_columns)  # type: ignore
+
+        if delete_args:
+            delete_ = delete_.with_dialect_options(**delete_args)
+
+        delete_._where_criteria = self._where_criteria
+        result: CursorResult[Any] = self.session.execute(
+            delete_,
+            self._params,
+            execution_options=self._execution_options.union(
+                {"synchronize_session": synchronize_session}
+            ),
+        )
+        bulk_del.result = result  # type: ignore
+        self.session.dispatch.after_bulk_delete(bulk_del)
+        result.close()
+
+        return result.rowcount
+
+    def update(
+        self,
+        values: Dict[_DMLColumnArgument, Any],
+        synchronize_session: SynchronizeSessionArgument = "auto",
+        update_args: Optional[Dict[Any, Any]] = None,
+    ) -> int:
+        r"""Perform an UPDATE with an arbitrary WHERE clause.
+
+        Updates rows matched by this query in the database.
+
+        E.g.::
+
+            sess.query(User).filter(User.age == 25).update(
+                {User.age: User.age - 10}, synchronize_session=False
+            )
+
+            sess.query(User).filter(User.age == 25).update(
+                {"age": User.age - 10}, synchronize_session="evaluate"
+            )
+
+        .. warning::
+
+            See the section :ref:`orm_expression_update_delete` for important
+            caveats and warnings, including limitations when using arbitrary
+            UPDATE and DELETE with mapper inheritance configurations.
+
+        :param values: a dictionary with attributes names, or alternatively
+         mapped attributes or SQL expressions, as keys, and literal
+         values or sql expressions as values.   If :ref:`parameter-ordered
+         mode <tutorial_parameter_ordered_updates>` is desired, the values can
+         be passed as a list of 2-tuples; this requires that the
+         :paramref:`~sqlalchemy.sql.expression.update.preserve_parameter_order`
+         flag is passed to the :paramref:`.Query.update.update_args` dictionary
+         as well.
+
+        :param synchronize_session: chooses the strategy to update the
+         attributes on objects in the session.   See the section
+         :ref:`orm_expression_update_delete` for a discussion of these
+         strategies.
+
+        :param update_args: Optional dictionary, if present will be passed
+         to the underlying :func:`_expression.update` construct as the ``**kw``
+         for the object.  May be used to pass dialect-specific arguments such
+         as ``mysql_limit``, as well as other special arguments such as
+         :paramref:`~sqlalchemy.sql.expression.update.preserve_parameter_order`.
+
+        :return: the count of rows matched as returned by the database's
+         "row count" feature.
+
+
+        .. seealso::
+
+            :ref:`orm_expression_update_delete`
+
+        """
+
+        update_args = update_args or {}
+
+        bulk_ud = BulkUpdate(self, values, update_args)
+
+        if self.dispatch.before_compile_update:
+            for fn in self.dispatch.before_compile_update:
+                new_query = fn(bulk_ud.query, bulk_ud)
+                if new_query is not None:
+                    bulk_ud.query = new_query
+            self = bulk_ud.query
+
+        upd = sql.update(*self._raw_columns)  # type: ignore
+
+        ppo = update_args.pop("preserve_parameter_order", False)
+        if ppo:
+            upd = upd.ordered_values(*values)  # type: ignore
+        else:
+            upd = upd.values(values)
+        if update_args:
+            upd = upd.with_dialect_options(**update_args)
+
+        upd._where_criteria = self._where_criteria
+        result: CursorResult[Any] = self.session.execute(
+            upd,
+            self._params,
+            execution_options=self._execution_options.union(
+                {"synchronize_session": synchronize_session}
+            ),
+        )
+        bulk_ud.result = result  # type: ignore
+        self.session.dispatch.after_bulk_update(bulk_ud)
+        result.close()
+        return result.rowcount
+
+    def _compile_state(
+        self, for_statement: bool = False, **kw: Any
+    ) -> ORMCompileState:
+        """Create an out-of-compiler ORMCompileState object.
+
+        The ORMCompileState object is normally created directly as a result
+        of the SQLCompiler.process() method being handed a Select()
+        or FromStatement() object that uses the "orm" plugin.   This method
+        provides a means of creating this ORMCompileState object directly
+        without using the compiler.
+
+        This method is used only for deprecated cases, which include
+        the .from_self() method for a Query that has multiple levels
+        of .from_self() in use, as well as the instances() method.  It is
+        also used within the test suite to generate ORMCompileState objects
+        for test purposes.
+
+        """
+
+        stmt = self._statement_20(for_statement=for_statement, **kw)
+        assert for_statement == stmt._compile_options._for_statement
+
+        # this chooses between ORMFromStatementCompileState and
+        # ORMSelectCompileState.  We could also base this on
+        # query._statement is not None as we have the ORM Query here
+        # however this is the more general path.
+        compile_state_cls = cast(
+            ORMCompileState,
+            ORMCompileState._get_plugin_class_for_plugin(stmt, "orm"),
+        )
+
+        return compile_state_cls._create_orm_context(
+            stmt, toplevel=True, compiler=None
+        )
+
+    def _compile_context(self, for_statement: bool = False) -> QueryContext:
+        compile_state = self._compile_state(for_statement=for_statement)
+        context = QueryContext(
+            compile_state,
+            compile_state.statement,
+            compile_state.statement,
+            self._params,
+            self.session,
+            self.load_options,
+        )
+
+        return context
+
+
+class AliasOption(interfaces.LoaderOption):
+    inherit_cache = False
+
+    @util.deprecated(
+        "1.4",
+        "The :class:`.AliasOption` object is not necessary "
+        "for entities to be matched up to a query that is established "
+        "via :meth:`.Query.from_statement` and now does nothing.",
+    )
+    def __init__(self, alias: Union[Alias, Subquery]):
+        r"""Return a :class:`.MapperOption` that will indicate to the
+        :class:`_query.Query`
+        that the main table has been aliased.
+
+        """
+
+    def process_compile_state(self, compile_state: ORMCompileState) -> None:
+        pass
+
+
+class BulkUD:
+    """State used for the orm.Query version of update() / delete().
+
+    This object is now specific to Query only.
+
+    """
+
+    def __init__(self, query: Query[Any]):
+        self.query = query.enable_eagerloads(False)
+        self._validate_query_state()
+        self.mapper = self.query._entity_from_pre_ent_zero()
+
+    def _validate_query_state(self) -> None:
+        for attr, methname, notset, op in (
+            ("_limit_clause", "limit()", None, operator.is_),
+            ("_offset_clause", "offset()", None, operator.is_),
+            ("_order_by_clauses", "order_by()", (), operator.eq),
+            ("_group_by_clauses", "group_by()", (), operator.eq),
+            ("_distinct", "distinct()", False, operator.is_),
+            (
+                "_from_obj",
+                "join(), outerjoin(), select_from(), or from_self()",
+                (),
+                operator.eq,
+            ),
+            (
+                "_setup_joins",
+                "join(), outerjoin(), select_from(), or from_self()",
+                (),
+                operator.eq,
+            ),
+        ):
+            if not op(getattr(self.query, attr), notset):
+                raise sa_exc.InvalidRequestError(
+                    "Can't call Query.update() or Query.delete() "
+                    "when %s has been called" % (methname,)
+                )
+
+    @property
+    def session(self) -> Session:
+        return self.query.session
+
+
+class BulkUpdate(BulkUD):
+    """BulkUD which handles UPDATEs."""
+
+    def __init__(
+        self,
+        query: Query[Any],
+        values: Dict[_DMLColumnArgument, Any],
+        update_kwargs: Optional[Dict[Any, Any]],
+    ):
+        super().__init__(query)
+        self.values = values
+        self.update_kwargs = update_kwargs
+
+
+class BulkDelete(BulkUD):
+    """BulkUD which handles DELETEs."""
+
+    def __init__(
+        self,
+        query: Query[Any],
+        delete_kwargs: Optional[Dict[Any, Any]],
+    ):
+        super().__init__(query)
+        self.delete_kwargs = delete_kwargs
+
+
+class RowReturningQuery(Query[Row[_TP]]):
+    if TYPE_CHECKING:
+
+        def tuples(self) -> Query[_TP]:  # type: ignore
+            ...