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Fixes: #6967
Change-Id: I222cb5bdedf572e734c827d72bcbced202cdd62f
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while I dont like this approach very much, people will likely
be asking for it a lot, so represent the most correct and
efficient form we can handle right now.
Added missing ``**kw`` arguments to the
:meth:`_asyncio.AsyncSession.connection` method.
Change-Id: Idadae2a02a4d96ecb96a5723ce64d017ab4c6217
References: https://github.com/sqlalchemy/sqlalchemy/discussions/6965
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Fixed issue where an engine that had ``implicit_returning`` set to False
would fail to function when PostgreSQL's "fast insertmany" feature were
used in conjunction with a ``Sequence``, as well as if any kind of
"executemany" with "return_defaults()" were used in conjunction with a
``Sequence``. Note that PostgreSQL "fast insertmany" uses "RETURNING" by
definition, when the SQL statement is passed to the driver; overall, the
``implicit_returning`` flag is legacy and has no real use in modern
SQLAlchemy, and will be deprecated in a separate change.
Fixes: #6963
Change-Id: Id8e3dd50a21b9124f338067b0fdb57b8f608dca8
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The :class:`_asyncio.AsyncSession` now supports overriding which
:class:`_orm.Session` it uses as the proxied instance. A custom ``Session``
class can be passed using the :paramref:`.AsyncSession.sync_session_class`
parameter or by subclassing the ``AsyncSession`` and specifying a custom
:attr:`.AsyncSession.sync_session_class`.
Fixes: #6689
Change-Id: Idf9c24eae6c9f4e2fff292ed748feaa449a8deaa
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Provide better error message when trying to insepct and async engine
or asnyc connection.
Change-Id: I907f3a22c6b76fe43df9d40cb0e69c57f74a7982
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Fixed bug where the error message for SQLite invalid isolation level on the
pysqlite driver would fail to indicate that "AUTOCOMMIT" is one of the
valid isolation levels.
Change-Id: Icbceab9a28af6a560859761fa92320b5473269a9
References: #6959
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Fixed issue where mypy plugin would crash when interpreting a
``query_expression()`` construct.
Fixes: #6950
Change-Id: Ic1f28d135bf6eb05c92061430c0d5a3663b804ef
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Fixed a bug in :meth:`_asyncio.AsyncSession.execute` and
:meth:`_asyncio.AsyncSession.stream` that required ``execution_options``
to be an instance of ``immutabledict`` when defined. It now
correctly accepts any mapping.
Fixes: #6943
Change-Id: Ic09de480dc2da1b0bdce25acb60b8f01371971f9
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Fixed issue in mypy plugin where columns on a mixin would not be correctly
interpreted if the mapped class relied upon a ``__tablename__`` routine
that came from a superclass.
Fixes: #6937
Change-Id: I74aed4862d0545008ee67f781aaa794ab6866926
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Fixes: #6912
Closes: #6920
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/6920
Pull-request-sha: 79af75dfddef25435afd9623698354d280d7c879
Change-Id: Ib6b472452f978378d9f511d17a26988323a89459
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Deprecate usage of :class:`_orm.scoped_session` with asyncio drivers.
When using Asyncio the :class:`_asyncio.async_scoped_session` should
be used instead.
Fixes: #6746
Change-Id: I540d57a406f59efc37fc61f0e9dfe03f32fe2904
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Fixed issue where the ability of the
:meth:`_engine.ConnectionEvents.before_execute` method to alter the SQL
statement object passed, returning the new object to be invoked, was
inadvertently removed. This behavior has been restored.
The refactor in a1939719a652774a437f69f8d4788b3f08650089 removed this
feature for some reason and there were no tests in place to detect
it. I don't see any indication this was planned.
Fixes: #6913
Change-Id: Ia77ca08aa91ab9403f19a8eb61e2a0e41aad138a
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Fixed issue in recently repaired ``Query.with_entities()`` method where the
flag that determines automatic uniquing for legacy ORM ``Query`` objects
only would be set to ``True`` inappropriately in cases where the
``with_entities()`` call would be setting the ``Query`` to return
column-only rows, which are not uniqued.
Fixes: #6924
Change-Id: I81120823914c989bb7a4d13ef2ec08809d8e5a4d
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Added a CAST(VARCHAR2(128)) to the "table name", "owner", and other
DDL-name parameters as used in reflection queries against Oracle system
views such as ALL_TABLES, ALL_TAB_CONSTRAINTS, etc to better enable
indexing to take place against these columns, as they previously would be
implicitly handled as NVARCHAR2 due to Python's use of Unicode for strings;
these columns are documented in all Oracle versions as being VARCHAR2 with
lengths varying from 30 to 128 characters depending on server version.
Additionally, test support has been enabled for Unicode-named DDL
structures against Oracle databases.
Fixes: #4486
Change-Id: I2787e3f8de1f656318692bd535d6a7f1cef1a841
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the change from lambdas in loader strategies as well
as the repair to caching for the Bundle construct has caused
a slight callcount bump.
Change-Id: I0b160c4a71efdb716f15ac3c128a8addbe10850d
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Revised the means by which the
:attr:`_orm.ORMExecuteState.user_defined_options` accessor receives
:class:`_orm.UserDefinedOption` and related option objects from the
context, with particular emphasis on the "selectinload" on the loader
strategy where this previously was not working; other strategies did not
have this problem. The objects that are associated with the current query
being executed, and not that of a query being cached, are now propagated
unconditionally. This essentially separates them out from the "loader
strategy" options which are explicitly associated with the compiled state
of a query and need to be used in relation to the cached query.
The effect of this fix is that a user-defined option, such as those used
by the dogpile.caching example as well as for other recipes such as
defining a "shard id" for the horizontal sharing extension, will be
correctly propagated to eager and lazy loaders regardless of whether
a cached query was ultimately invoked.
Fixes: #6887
Change-Id: Ieaae5b01c85de26ea732ebd625e6e5823a470492
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Fixed issue in :func:`_orm.selectinload` where use of the new
:meth:`_orm.PropComparator.and_` feature within options that were nested
more than one level deep would fail to update bound parameter values that
were in the nested criteria, as a side effect of SQL statement caching.
Implementation adds a new step that rewrites the parameters
inside of all _extra_criteria when invoking selectinload
as well as subqueryload. Additionally, changed how Load()
gets "extra_criteria", in that it pulls it from
UnboundLoad._extra_criteria instead of re-fetching it from the
path elements, which are not updated by this new step.
This patch also builds upon the removal of lambda queries
for use in loader strategies in #6889. lambdas made this issue
much more difficult to diagnose. An attempt to reintroduce
lambdas here after finally identifying the "extra_criteria"
issue above showed that lambdas still impact the
assertsql fixture, meaning we have a statement structure that
upon calling .compile() still delivers stale data due to lambdas,
even if caching is turned off, and the non-cached test was still
failing due to stale data within the lambdas.
This is basically the complexity that #6889 fixes and as there's
no real performance gain to using lambdas in these strategies
on top of the existing statement caching that does most of the
work, it should be much less likely going forward to have as many
deeply confusing issues as we've had within selectinload/lazyload
in the 1.4 series.
Fixes: #6881
Change-Id: I919c079d2ed06125def5f8d6d81f3f305e158c04
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Fixed issue in lambda caching system where an element of a query that
produces no cache key, like a custom option or clause element, would still
populate the expression in the "lambda cache" inappropriately.
This was discovered as part of :ticket:`6887` but is a separate
issue.
References: #6887
Change-Id: I1665f4320254ddc63a0abf3088e9daeaffbd1840
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Adjusted ORM loader internals to no longer use the "lambda caching" system
that was added in 1.4, as well as repaired one location that was still
using the previous "baked query" system for a query. The lambda caching
system remains an effective way to reduce the overhead of building up
queries that have relatively fixed usage patterns. In the case of loader
strategies, the queries used are responsible for moving through lots of
arbitrary options and criteria, which is both generated and sometimes
consumed by end-user code, that make the lambda cache concept not any more
efficient than not using it, at the cost of more complexity. In particular
the problems noted by :ticket:`6881` and :ticket:`6887` are made
considerably less complicated by removing this feature internally.
Fixed an issue where the :class:`_orm.Bundle` construct would not create
proper cache keys, leading to inefficient use of the query cache. This
had some impact on the "selectinload" strategy and was identified as
part of :ticket:`6889`.
Added a Select._create_raw_select() method which essentially
performs ``__new__`` and then populates ``__dict__`` directly,
with no coercions. This saves most of the overhead time that
the lambda caching system otherwise seeks to avoid.
Includes removal of bakedquery from
mapper->_subclass_load_via_in() which was overlooked from
the 1.4 refactor.
Fixes: #6079
Fixes: #6889
Change-Id: Ieac2d9d709b71ec4270e5c121fbac6ac870e2bb1
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Adjusted the "from linter" warning feature to accommodate for a chain of
joins more than one level deep where the ON clauses don't explicitly match
up the targets, such as an expression such as "ON TRUE". This mode of use
is intended to cancel the cartesian product warning simply by the fact that
there's a JOIN from "a to b", which was not working for the case where the
chain of joins had more than one element.
this incurs a bit more compiler overhead that comes out in profiling
but is not extensive.
Added the "is_comparison" flag to the PostgreSQL "overlaps",
"contained_by", "contains" operators, so that they work in relevant ORM
contexts as well as in conjunction with the "from linter" feature.
Fixes: #6886
Change-Id: I078dc3fe6d4f7871ffe4ebac3e71e62f3f213d12
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Unify behaviour :class:`_schema.Enum` in native and non-native
implementations regarding the accepted values for an enum with
aliased elements.
When :paramref:`_schema.Enum.omit_aliases` is ``False`` all values,
alias included, are accepted as valid values.
When :paramref:`_schema.Enum.omit_aliases` is ``True`` only non aliased values
are accepted as valid values.
Fixes: #6146
Change-Id: I6f40789c1ca56e533990882deadcc6a377d4fc40
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The setup requirements have been modified such ``greenlet`` is a default
requirement only for those platforms that are well known for ``greenlet``
to be installable and for which there is already a pre-built binary on
pypi; the current list is ``x86_64 aarch64 ppc64le amd64 win32``. For other
platforms, greenlet will not install by default, which should enable
installation and test suite running of SQLAlchemy 1.4 on platforms that
don't support ``greenlet``, excluding any asyncio features. In order to
install with the ``greenlet`` dependency included on a machine architecture
outside of the above list, the ``[asyncio]`` extra may be included by
running ``pip install sqlalchemy[asyncio]`` which will then attempt to
install ``greenlet``.
Additionally, the test suite has been repaired so that tests can complete
fully when greenlet is not installed, with appropriate skips for
asyncio-related tests.
Fixes: #6136
Change-Id: I8f3a1c00a4a8b6a273484af1da1f7aaadf588ae7
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Fixed issue in loader strategies where the use of the
:meth:`_orm.Load.options` method, particularly when nesting multiple calls,
would generate an overly long and more importantly non-deterministic cache
key, leading to very large cache keys which were also not allowing
efficient cache usage, both in terms of total memory used as well as number
of entries used in the cache itself.
Fixes: #6869
Change-Id: I42bd3564d55a5fb95a21d0e7eef30d50c1274da0
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Added new attribute :attr:`_sql.Select.columns_clause_froms` that will
retrieve the FROM list implied by the columns clause of the
:class:`_sql.Select` statement. This differs from the old
:attr:`_sql.Select.froms` collection in that it does not perform any ORM
compilation steps, which necessarily deannotate the FROM elements and do
things like compute joinedloads etc., which makes it not an appropriate
candidate for the :meth:`_sql.Select.select_from` method. Additionally adds
a new parameter
:paramref:`_sql.Select.with_only_columns.maintain_column_froms` that
transfers this collection to :meth:`_sql.Select.select_from` before
replacing the columns collection.
In addition, the :attr:`_sql.Select.froms` is renamed to
:meth:`_sql.Select.get_final_froms`, to stress that this collection is not
a simple accessor and is instead calculated given the full state of the
object, which can be an expensive call when used in an ORM context.
Additionally fixes a regression involving the
:func:`_orm.with_only_columns` function to support applying criteria to
column elements that were replaced with either
:meth:`_sql.Select.with_only_columns` or :meth:`_orm.Query.with_entities` ,
which had broken as part of :ticket:`6503` released in 1.4.19.
Fixes: #6808
Change-Id: Ib5d66cce488bbaca06dab4f68fb5cdaa73e8823e
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Fix issue in :class:`_sql.CTE` where new :meth:`_sql.HasCTE.add_cte` method
added in version 1.4.21 / :ticket:`6752` failed to function correctly for
"compound select" structures such as :func:`_sql.union`,
:func:`_sql.union_all`, :func:`_sql.except`, etc. Pull request courtesy
Eric Masseran.
Fixes: #6752
Closes: #6849
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/6849
Pull-request-sha: 1c4b4d72b2789cf89ff5043ca964ebdd6c9a6617
Change-Id: I49a16a4fc2af8299502011f3a02d8a2ad93255e3
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this appears to be unnecessary and prevents end-user
literal_binds case from working.
Fixed issue where the ``literal_binds`` compiler flag, as used externally
to render bound parameters inline, would fail to work when used with a
certain class of parameters known as "literal_execute", which covers things
like LIMIT and OFFSET values for dialects where the drivers don't allow a
bound parameter, such as SQL Server's "TOP" clause. The issue locally
seemed to affect only the MSSQL dialect.
Fixes: #6863
Change-Id: Ia74cff5b0107b129a11b9b965883552b2962e449
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A major refactor of the mypy plugin
Closes: #6764
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/6764
Pull-request-sha: 3e2295b2da7b57a6669f26db0df78f6409934184
Change-Id: I067d56dcfbc998ddd1b22a448f756859428b9e31
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Change-Id: Ida86ed40c43d91813151621b847376976773a5f9
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Fixed an issue in the ``CacheKey.to_offline_string()`` method used by the
dogpile.caching example where attempting to create a proper cache key from
the special "lambda" query generated by the lazy loader would fail to
include the parameter values, leading to an incorrect cache key.
Fixes: #6858
Change-Id: Ice27087583c6f3ff79cf7d5b879e5dd0a4e58158
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Fixed issue where a bound parameter object that was "cloned" would cause a
name conflict in the compiler, if more than one clone of this parameter
were used at the same time in a single statement. This could occur in
particular with things like ORM single table inheritance queries that
indicated the same "discriminator" value multiple times in one query.
Fixes: #6824
Change-Id: Iba7a786fc5a2341ff7d07fc666d24ed790ad4fe8
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