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Sometimes it might be useful to have 'native' autocommit support
provided by a DB API driver rather than rely on SQLAlchemy autocommit
emulation.
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many-to-one ``!= None`` would fail if the source were an aliased
class, or if the query needed to apply special aliasing to the
expression due to aliased joins or polymorphic querying; also fixed
bug in the case where comparing a many-to-one to an object state
would fail if the query needed to apply special aliasing
due to aliased joins or polymorphic querying.
fixes #3310
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an ``after_rollback()`` handler for a :class:`.Session` incorrectly
adds state to that :class:`.Session` within the handler, and the task
to warn and remove this state (established by :ticket:`2389`) attempts
to proceed.
fixes #3309
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asserting.
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in callcounts specific to the "expiration" of objects, as in
the "auto expire" feature of :meth:`.Session.commit` and
for :meth:`.Session.expire_all`, as well as in the "cleanup" step
which occurs when object states are garbage collected.
fixes #3307
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as :class:`.TypeDecorator` objects.
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dialect on a type where MySQL does not support CAST; MySQL only
supports CAST on a subset of datatypes. SQLAlchemy has for a long
time just omitted the CAST for unsupported types in the case of
MySQL. While we don't want to change this now, we emit a warning
to show that it's taken place. A warning is also emitted when
a CAST is used with an older MySQL version (< 4) that doesn't support
CAST at all, it's skipped in this case as well.
fixes #3237
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when using the :paramref:`.Column.server_default` parameter, will
now be rendered using the "inline" compiler, so that they are rendered
as-is, rather than as bound parameters.
fixes #3087
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Conflicts:
lib/sqlalchemy/orm/query.py
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commit of pr152
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on jenkins
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all cases, so that MySQL 5.6.6 with the
``explicit_defaults_for_timestamp`` flag enabled will
will allow TIMESTAMP to continue to work as expected when
``nullable=False``. Existing applications are unaffected as
SQLAlchemy has always emitted NULL for a TIMESTAMP column that
is ``nullable=True``. fixes #3155
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:meth:`.Connection.invalidate` method, or an invalidation due
to a database disconnect, would fail if the
``isolation_level`` parameter had been used with
:meth:`.Connection.execution_options`; the "finalizer" that resets
the isolation level would be called on the no longer opened connection.
fixes #3302
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with :meth:`.Connection.execution_options` when a :class:`.Transaction`
is in play; DBAPIs and/or SQLAlchemy dialects such as psycopg2,
MySQLdb may implicitly rollback or commit the transaction, or
not change the setting til next transaction, so this is never safe.
- Added new parameter :paramref:`.Session.connection.execution_options`
which may be used to set up execution options on a :class:`.Connection`
when it is first checked out, before the transaction has begun.
This is used to set up options such as isolation level on the
connection before the transaction starts.
- added new documentation section
detailing best practices for setting transaction isolation with
sessions.
fixes #3296
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primaryjoin that referred to the same "local" column multiple
times in the "column that points to itself" style of self-referential
join would not be substituted in all cases. The logic to determine
substitutions here has been reworked to be more open-ended.
fixes #3300
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this would cause LazyLoader to be initialized twice per property.
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the ARRAY type when using psycopg2. The psycopg2 dialect now
employs use of the psycopg2.extras.register_uuid() hook
so that UUID values are always passed to/from the DBAPI as
UUID() objects. The :paramref:`.UUID.as_uuid` flag is still
honored, except with psycopg2 we need to convert returned
UUID objects back into strings when this is disabled.
fixes #2940
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using psycopg2 2.5.4 or greater, which features native conversion
of JSONB data so that SQLAlchemy's converters must be disabled;
additionally, the newly added psycopg2 extension
``extras.register_default_jsonb`` is used to establish a JSON
deserializer passed to the dialect via the ``json_deserializer``
argument. Also repaired the Postgresql integration tests which
weren't actually round-tripping the JSONB type as opposed to the
JSON type. Pull request courtesy Mateusz Susik.
- Repaired the use of the "array_oid" flag when registering the
HSTORE type with older psycopg2 versions < 2.4.3, which does not
support this flag, as well as use of the native json serializer
hook "register_default_json" with user-defined ``json_deserializer``
on psycopg2 versions < 2.5, which does not include native json.
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conventions that include the token ``%(column_0_name)s``; the
constraint expression is scanned for columns. Additionally,
naming conventions for check constraints that don't include the
``%(constraint_name)s`` token will now work for :class:`.SchemaType`-
generated constraints, such as those of :class:`.Boolean` and
:class:`.Enum`; this stopped working in 0.9.7 due to :ticket:`3067`.
fixes #3299
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the logic used to link a :class:`.ForeignKey` to its parent could fail
when the foreign key used "link_to_name=True" in conjunction with
a target :class:`.Table` that would not receive its parent column until
later, such as within a reflection + "useexisting" scenario,
if the target column in fact had a key value different from its name,
as would occur in reflection if column reflect events were used to
alter the .key of reflected :class:`.Column` objects so that the
link_to_name becomes significant. Also repaired support for column
type via FK transmission in a similar way when target columns had a
different key and were referenced using link_to_name.
fixes #3298
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- rewrite the multiple mappers section
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consists mainly of adjusting fixtures to ensure connections are closed
explicitly. psycopg2cffi also handles unicode bind parameter
names differently than psycopg2, and seems to possibly have a little less
control over floating point values at least in one test which is
marked as a "fail", though will see if it runs differently on linux
than osx..
- changelog for psycopg2cffi, fixes #3052
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