Added release notes for 4b31a6a9
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Thanks Florian for reporting this omission.
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@ -66,6 +66,12 @@ UTC. This limitation was lifted in Django 1.6. Use :meth:`QuerySet.datetimes()
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<django.db.models.query.QuerySet.datetimes>` to perform time zone aware
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aggregation on a :class:`~django.db.models.DateTimeField`.
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Support for savepoints in SQLite
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Django 1.6 adds support for savepoints in SQLite, with some :ref:`limitations
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<savepoints-in-sqlite>`.
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``BinaryField`` model field
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@ -189,12 +195,29 @@ Backwards incompatible changes in 1.6
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New transaction management model
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Behavior changes
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^^^^^^^^^^^^^^^^
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Database-level autocommit is enabled by default in Django 1.6. While this
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doesn't change the general spirit of Django's transaction management, there
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are a few known backwards-incompatibities, described in the :ref:`transaction
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management docs <transactions-upgrading-from-1.5>`. You should review your
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code to determine if you're affected.
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Savepoints and ``assertNumQueries``
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The changes in transaction management may result in additional statements to
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create, release or rollback savepoints. This is more likely to happen with
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SQLite, since it didn't support savepoints until this release.
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If tests using :meth:`~django.test.TestCase.assertNumQueries` fail because of
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a higher number of queries than expected, check that the extra queries are
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related to savepoints, and adjust the expected number of queries accordingly.
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Autocommit option for PostgreSQL
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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In previous versions, database-level autocommit was only an option for
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PostgreSQL, and it was disabled by default. This option is now :ref:`ignored
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<postgresql-autocommit-mode>` and can be removed.
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@ -372,11 +372,13 @@ The following example demonstrates the use of savepoints::
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Database-specific notes
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=======================
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.. _savepoints-in-sqlite:
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Savepoints in SQLite
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--------------------
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While SQLite ≥ 3.6.8 supports savepoints, a flaw in the design of the
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:mod:`sqlite3` makes them hardly usable.
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:mod:`sqlite3` module makes them hardly usable.
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When autocommit is enabled, savepoints don't make sense. When it's disabled,
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:mod:`sqlite3` commits implicitly before savepoint statements. (In fact, it
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