Update psycopg2 to 2.9.7

[pyup-bot]

This PR updates psycopg2 from 2.4.5 to 2.9.7.

Changelog

2.9.7

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fix propagation of exceptions raised during module initialization
(:ticket:`1598`).
- Fix building when pg_config returns an empty string (:ticket:`1599`).
- Wheel package compiled against OpenSSL 1.1.1v.

2.9.6

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Package manylinux 2014 for aarch64 and ppc64le platforms, in order to
include libpq 15 in the binary package (:ticket:`1396`).
- Wheel package compiled against OpenSSL 1.1.1t.

2.9.5

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Add support for Python 3.11.
- Add support for rowcount in MERGE statements in binary packages
(:ticket:`1497`).
- Wheel package compiled against OpenSSL 1.1.1r and PostgreSQL 15 libpq.

2.9.4

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fix `~psycopg2.extras.register_composite()`,
`~psycopg2.extras.register_range()` with customized :sql:`search_path`
(:ticket:`1487`).
- Handle correctly composite types with names or in schemas requiring escape.
- Find ``pg_service.conf`` file in the ``/etc/postgresql-common`` directory in
binary packages (:ticket:`1365`).
- `~psycopg2.errorcodes` map and `~psycopg2.errors` classes updated to
PostgreSQL 15.
- Wheel package compiled against OpenSSL 1.1.1q and PostgreSQL 14.4 libpq.

2.9.3

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Alpine (musl) wheels now available (:ticket:`1392`).
- macOS arm64 (Apple M1) wheels now available (:ticket:`1482`).

2.9.2

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Raise `ValueError` for dates >= Y10k (:ticket:`1307`).
- `~psycopg2.errorcodes` map and `~psycopg2.errors` classes updated to
PostgreSQL 14.
- Add preliminary support for Python 3.11 (:tickets:`1376, 1386`).
- Wheel package compiled against OpenSSL 1.1.1l and PostgreSQL 14.1 libpq
(:ticket:`1388`).

2.9.1

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fix regression with named `~psycopg2.sql.Placeholder` (:ticket:`1291`).

2.9

-------------------------

- ``with connection`` starts a transaction on autocommit transactions too
(:ticket:`941`).
- Timezones with fractional minutes are supported on Python 3.7 and following
(:ticket:`1272`).
- Escape table and column names in `~cursor.copy_from()` and
`~cursor.copy_to()`.
- Connection exceptions with sqlstate ``08XXX`` reclassified as
`~psycopg2.OperationalError` (a subclass of the previously used
`~psycopg2.DatabaseError`) (:ticket:`1148`).
- Include library dirs required from libpq to work around MacOS build problems
(:ticket:`1200`).

Other changes:

- Dropped support for Python 2.7, 3.4, 3.5 (:tickets:`1198, 1000, 1197`).
- Dropped support for mx.DateTime.
- Use `datetime.timezone` objects by default in datetime objects instead of
`~psycopg2.tz.FixedOffsetTimezone`.
- The `psycopg2.tz` module is deprecated and scheduled to be dropped in the
next major release.
- Provide :pep:`599` wheels packages (manylinux2014 tag) for i686 and x86_64
platforms.
- Provide :pep:`600` wheels packages (manylinux_2_24 tag) for aarch64 and
ppc64le platforms.
- Wheel package compiled against OpenSSL 1.1.1k and PostgreSQL 13.3 libpq.
- Build system for Linux/MacOS binary packages moved to GitHub Actions.

2.8.7

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Accept empty params as `~psycopg2.connect()` (:ticket:`1250`).
- Fix attributes refcount in `Column` initialisation (:ticket:`1252`).
- Allow re-initialisation of static variables in the C module (:ticket:`1267`).

2.8.6

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed memory leak changing connection encoding to the current one
(:ticket:`1101`).
- Fixed search of mxDateTime headers in virtualenvs (:ticket:`996`).
- Added missing values from errorcodes (:ticket:`1133`).
- `cursor.query` reports the query of the last :sql:`COPY` operation too
(:ticket:`1141`).
- `~psycopg2.errorcodes` map and `~psycopg2.errors` classes updated to
PostgreSQL 13.
- Added wheel packages for ARM architecture (:ticket:`1125`).
- Wheel package compiled against OpenSSL 1.1.1g.

2.8.5

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed use of `!connection_factory` and `!cursor_factory` together
(:ticket:`1019`).
- Added support for `~logging.LoggerAdapter` in
`~psycopg2.extras.LoggingConnection` (:ticket:`1026`).
- `~psycopg2.extensions.Column` objects in `cursor.description` can be sliced
(:ticket:`1034`).
- Added AIX support (:ticket:`1061`).
- Fixed `~copy.copy()` of `~psycopg2.extras.DictCursor` rows (:ticket:`1073`).

2.8.4

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed building with Python 3.8 (:ticket:`854`).
- Don't swallow keyboard interrupts on connect when a password is specified
in the connection string (:ticket:`898`).
- Don't advance replication cursor when the message wasn't confirmed
(:ticket:`940`).
- Fixed inclusion of ``time.h`` on linux (:ticket:`951`).
- Fixed int overflow for large values in `~psycopg2.extensions.Column.table_oid`
and `~psycopg2.extensions.Column.type_code` (:ticket:`961`).
- `~psycopg2.errorcodes` map and `~psycopg2.errors` classes updated to
PostgreSQL 12.
- Wheel package compiled against OpenSSL 1.1.1d and PostgreSQL at least 11.4.

2.8.3

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Added *interval_status* parameter to
`~psycopg2.extras.ReplicationCursor.start_replication()` method and other
facilities to send automatic replication keepalives at periodic intervals
(:ticket:`913`).
- Fixed namedtuples caching introduced in 2.8 (:ticket:`928`).

2.8.2

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed `~psycopg2.extras.RealDictCursor` when there are repeated columns
(:ticket:`884`).
- Binary packages built with openssl 1.1.1b. Should fix concurrency problems
(:tickets:`543, 836`).

2.8.1

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed `~psycopg2.extras.RealDictRow` modifiability (:ticket:`886`).
- Fixed "there's no async cursor" error polling a connection with no cursor
(:ticket:`887`).

2.8

-------------------------

New features:

- Added `~psycopg2.errors` module. Every PostgreSQL error is converted into
a specific exception class (:ticket:`682`).
- Added `~psycopg2.extensions.encrypt_password()` function (:ticket:`576`).
- Added `~psycopg2.extensions.BYTES` adapter to manage databases with mixed
encodings on Python 3 (:ticket:`835`).
- Added `~psycopg2.extensions.Column.table_oid` and
`~psycopg2.extensions.Column.table_column` attributes on `cursor.description`
items (:ticket:`661`).
- Added `connection.info` object to retrieve various PostgreSQL connection
information (:ticket:`726`).
- Added `~connection.get_native_connection()` to expose the raw ``PGconn``
structure to C extensions via Capsule (:ticket:`782`).
- Added `~connection.pgconn_ptr` and `~cursor.pgresult_ptr` to expose raw
C structures to Python and interact with libpq via ctypes (:ticket:`782`).
- `~psycopg2.sql.Identifier` can represent qualified names in SQL composition
(:ticket:`732`).
- Added `!ReplicationCursor`.\ `~psycopg2.extras.ReplicationCursor.wal_end`
attribute (:ticket:`800`).
- Added *fetch* parameter to `~psycopg2.extras.execute_values()` function
(:ticket:`813`).
- `!str()` on `~psycopg2.extras.Range` produces a human-readable representation
(:ticket:`773`).
- `~psycopg2.extras.DictCursor` and `~psycopg2.extras.RealDictCursor` rows
maintain columns order (:ticket:`177`).
- Added `~psycopg2.extensions.Diagnostics.severity_nonlocalized` attribute on
the `~psycopg2.extensions.Diagnostics` object (:ticket:`783`).
- More efficient `~psycopg2.extras.NamedTupleCursor` (:ticket:`838`).

Bug fixes:

- Fixed connections occasionally broken by the unrelated use of the
multiprocessing module (:ticket:`829`).
- Fixed async communication blocking if results are returned in different
chunks, e.g. with notices interspersed to the results (:ticket:`856`).
- Fixed adaptation of numeric subclasses such as `~enum.IntEnum`
(:ticket:`591`).

Other changes:

- Dropped support for Python 2.6, 3.2, 3.3.
- Dropped `psycopg1` module.
- Dropped deprecated `!register_tstz_w_secs()` (was previously a no-op).
- Dropped deprecated `!PersistentConnectionPool`. This pool class was mostly
designed to interact with Zope. Use `!ZPsycopgDA.pool` instead.
- Binary packages no longer installed by default. The 'psycopg2-binary'
package must be used explicitly.
- Dropped `!PSYCOPG_DISPLAY_SIZE` build parameter.
- Dropped support for mxDateTime as the default date and time adapter.
mxDatetime support continues to be available as an alternative to Python's
builtin datetime.
- No longer use 2to3 during installation for Python 2 & 3 compatibility. All
source files are now compatible with Python 2 & 3 as is.
- The `!psycopg2.test` package is no longer installed by ``python setup.py
install``.
- Wheel package compiled against OpenSSL 1.0.2r and PostgreSQL 11.2 libpq.

2.7.7

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Cleanup of the cursor results assignment code, which might have solved
double free and inconsistencies in concurrent usage (:tickets:`346, 384`).
- Wheel package compiled against OpenSSL 1.0.2q.

2.7.6.1

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed binary package broken on OS X 10.12 (:ticket:`807`).
- Wheel package compiled against PostgreSQL 11.1 libpq.

2.7.6

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Close named cursors if exist, even if `~cursor.execute()` wasn't called
(:ticket:`746`).
- Fixed building on modern FreeBSD versions with Python 3.7 (:ticket:`755`).
- Fixed hang trying to :sql:`COPY` via `~cursor.execute()` in asynchronous
connections (:ticket:`781`).
- Fixed adaptation of arrays of empty arrays (:ticket:`788`).
- Fixed segfault accessing the connection's `~connection.readonly` and
`~connection.deferrable` attributes repeatedly (:ticket:`790`).
- `~psycopg2.extras.execute_values()` accepts `~psycopg2.sql.Composable`
objects (:ticket:`794`).
- `~psycopg2.errorcodes` map updated to PostgreSQL 11.
- Wheel package compiled against PostgreSQL 10.5 libpq and OpenSSL 1.0.2p.

2.7.5

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Allow non-ascii chars in namedtuple fields (regression introduced fixing
:ticket:`211`).
- Fixed adaptation of arrays of arrays of nulls (:ticket:`325`).
- Fixed building on Solaris 11 and derivatives such as SmartOS and illumos
(:ticket:`677`).
- Maybe fixed building on MSYS2 (as reported in :ticket:`658`).
- Allow string subclasses in connection and other places (:ticket:`679`).
- Don't raise an exception closing an unused named cursor (:ticket:`716`).
- Wheel package compiled against PostgreSQL 10.4 libpq and OpenSSL 1.0.2o.

2.7.4

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Moving away from installing the wheel package by default.
Packages installed from wheel raise a warning on import. Added package
``psycopg2-binary`` to install from wheel instead (:ticket:`543`).
- Convert fields names into valid Python identifiers in
`~psycopg2.extras.NamedTupleCursor` (:ticket:`211`).
- Fixed Solaris 10 support (:ticket:`532`).
- `cursor.mogrify()` can be called on closed cursors (:ticket:`579`).
- Fixed setting session characteristics in corner cases on autocommit
connections (:ticket:`580`).
- Fixed `~psycopg2.extras.MinTimeLoggingCursor` on Python 3 (:ticket:`609`).
- Fixed parsing of array of points as floats (:ticket:`613`).
- Fixed `~psycopg2.__libpq_version__` building with libpq >= 10.1
(:ticket:`632`).
- Fixed `~cursor.rowcount` after `~cursor.executemany()` with :sql:`RETURNING`
statements (:ticket:`633`).
- Fixed compatibility problem with pypy3 (:ticket:`649`).
- Wheel packages compiled against PostgreSQL 10.1 libpq and OpenSSL 1.0.2n.
- Wheel packages for Python 2.6 no more available (support dropped from
wheel building infrastructure).

2.7.3.2

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Wheel package compiled against PostgreSQL 10.0 libpq and OpenSSL 1.0.2l
(:tickets:`601, 602`).

2.7.3.1

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Dropped libresolv from wheel package to avoid incompatibility with
glibc 2.26 (wheels ticket 2).

2.7.3

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Restored default :sql:`timestamptz[]` typecasting to Python `!datetime`.
Regression introduced in Psycopg 2.7.2 (:ticket:`578`).

2.7.2

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed inconsistent state in externally closed connections
(:tickets:`263, 311, 443`). Was fixed in 2.6.2 but not included in
2.7 by mistake.
- Fixed Python exceptions propagation in green callback (:ticket:`410`).
- Don't display the password in `connection.dsn` when the connection
string is specified as an URI (:ticket:`528`).
- Return objects with timezone parsing "infinity" :sql:`timestamptz`
(:ticket:`536`).
- Dropped dependency on VC9 runtime on Windows binary packages
(:ticket:`541`).
- Fixed segfault in `~connection.lobject()` when *mode*\=\ `!None`
(:ticket:`544`).
- Fixed `~connection.lobject()` keyword argument *lobject_factory*
(:ticket:`545`).
- Fixed `~psycopg2.extras.ReplicationCursor.consume_stream()`
*keepalive_interval* argument (:ticket:`547`).
- Maybe fixed random import error on Python 3.6 in multiprocess
environment (:ticket:`550`).
- Fixed random `!SystemError` upon receiving abort signal (:ticket:`551`).
- Accept `~psycopg2.sql.Composable` objects in
`~psycopg2.extras.ReplicationCursor.start_replication_expert()`
(:ticket:`554`).
- Parse intervals returned as microseconds from Redshift (:ticket:`558`).
- Added `~psycopg2.extras.Json` `!prepare()` method to consider connection
params when adapting (:ticket:`562`).
- `~psycopg2.errorcodes` map updated to PostgreSQL 10 beta 1.

2.7.1

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Ignore `!None` arguments passed to `~psycopg2.connect()` and
`~psycopg2.extensions.make_dsn()` (:ticket:`517`).
- OpenSSL upgraded from major version 0.9.8 to 1.0.2 in the Linux wheel
packages (:ticket:`518`).
- Fixed build with libpq versions < 9.3 (:ticket:`520`).

2.7

-------------------------

New features:

- Added `~psycopg2.sql` module to generate SQL dynamically (:ticket:`308`).
- Added :ref:`replication-support` (:ticket:`322`). Main authors are
Oleksandr Shulgin and Craig Ringer, who deserve a huge thank you.
- Added `~psycopg2.extensions.parse_dsn()` and
`~psycopg2.extensions.make_dsn()` functions (:tickets:`321, 363`).
`~psycopg2.connect()` now can take both *dsn* and keyword arguments, merging
them together.
- Added `~psycopg2.__libpq_version__` and
`~psycopg2.extensions.libpq_version()` to inspect the version of the
``libpq`` library the module was compiled/loaded with
(:tickets:`35, 323`).
- The attributes `~connection.notices` and `~connection.notifies` can be
customized replacing them with any object exposing an `!append()` method
(:ticket:`326`).
- Adapt network types to `ipaddress` objects when available. When not
enabled, convert arrays of network types to lists by default. The old `!Inet`
adapter is deprecated (:tickets:`317, 343, 387`).
- Added `~psycopg2.extensions.quote_ident()` function (:ticket:`359`).
- Added `~connection.get_dsn_parameters()` connection method (:ticket:`364`).
- `~cursor.callproc()` now accepts a dictionary of parameters (:ticket:`381`).
- Give precedence to `!__conform__()` over superclasses to choose an object
adapter (:ticket:`456`).
- Using Python C API decoding functions and codecs caching for faster
unicode encoding/decoding (:ticket:`473`).
- `~cursor.executemany()` slowness addressed by
`~psycopg2.extras.execute_batch()` and `~psycopg2.extras.execute_values()`
(:ticket:`491`).
- Added ``async_`` as an alias for ``async`` to support Python 3.7 where
``async`` will become a keyword (:ticket:`495`).
- Unless in autocommit, do not use :sql:`default_transaction_*` settings to
control the session characteristics as it may create problems with external
connection pools such as pgbouncer; use :sql:`BEGIN` options instead
(:ticket:`503`).
- `~connection.isolation_level` is now writable and entirely separated from
`~connection.autocommit`; added `~connection.readonly`,
`~connection.deferrable` writable attributes.

Bug fixes:

- Throw an exception trying to pass ``NULL`` chars as parameters
(:ticket:`420`).
- Fixed error caused by missing decoding `~psycopg2.extras.LoggingConnection`
(:ticket:`483`).
- Fixed integer overflow in :sql:`interval` seconds (:ticket:`512`).
- Make `~psycopg2.extras.Range` objects picklable (:ticket:`462`).
- Fixed version parsing and building with PostgreSQL 10 (:ticket:`489`).

Other changes:

- Dropped support for Python 2.5 and 3.1.
- Dropped support for client library older than PostgreSQL 9.1 (but older
server versions are still supported).
- `~connection.isolation_level` doesn't read from the database but will return
`~psycopg2.extensions.ISOLATION_LEVEL_DEFAULT` if no value was set on the
connection.
- Empty arrays no more converted into lists if they don't have a type attached
(:ticket:`506`)

2.6.2

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed inconsistent state in externally closed connections
(:tickets:`263, 311, 443`).
- Report the server response status on errors (such as :ticket:`281`).
- Raise `!NotSupportedError` on unhandled server response status
(:ticket:`352`).
- Allow overriding string adapter encoding with no connection (:ticket:`331`).
- The `~psycopg2.extras.wait_select` callback allows interrupting a
long-running query in an interactive shell using :kbd:`Ctrl-C`
(:ticket:`333`).
- Fixed `!PersistentConnectionPool` on Python 3 (:ticket:`348`).
- Fixed segfault on `repr()` of an unitialized connection (:ticket:`361`).
- Allow adapting bytes using `~psycopg2.extensions.QuotedString` on Python 3
(:ticket:`365`).
- Added support for setuptools/wheel (:ticket:`370`).
- Fix build on Windows with Python 3.5, VS 2015 (:ticket:`380`).
- Fixed `!errorcodes.lookup` initialization thread-safety (:ticket:`382`).
- Fixed `!read()` exception propagation in copy_from (:ticket:`412`).
- Fixed possible NULL TZ decref  (:ticket:`424`).
- `~psycopg2.errorcodes` map updated to PostgreSQL 9.5.

2.6.1

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Lists consisting of only `None` are escaped correctly (:ticket:`285`).
- Fixed deadlock in multithread programs using OpenSSL (:ticket:`290`).
- Correctly unlock the connection after error in flush (:ticket:`294`).
- Fixed `!MinTimeLoggingCursor.callproc()` (:ticket:`309`).
- Added support for MSVC 2015 compiler (:ticket:`350`).

2.6

-------------------------

New features:

- Added support for large objects larger than 2GB. Many thanks to Blake Rouse
and the MAAS Team for the feature development.
- Python `time` objects with a tzinfo specified and PostgreSQL :sql:`timetz`
data are converted into each other (:ticket:`272`).

Bug fixes:

- Json adapter's `!str()` returns the adapted content instead of the `!repr()`
(:ticket:`191`).

2.5.5

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Named cursors used as context manager don't swallow the exception on exit
(:ticket:`262`).
- `cursor.description` can be pickled (:ticket:`265`).
- Propagate read error messages in COPY FROM (:ticket:`270`).
- PostgreSQL time 24:00 is converted to Python 00:00 (:ticket:`278`).

2.5.4

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Added :sql:`jsonb` support for PostgreSQL 9.4 (:ticket:`226`).
- Fixed segfault if COPY statements are passed to `~cursor.execute()` instead
of using the proper methods (:ticket:`219`).
- Force conversion of pool arguments to integer to avoid potentially unbounded
pools (:ticket:`220`).
- Cursors :sql:`WITH HOLD` don't begin a new transaction upon move/fetch/close
(:ticket:`228`).
- Cursors :sql:`WITH HOLD` can be used in autocommit (:ticket:`229`).
- `~cursor.callproc()` doesn't silently ignore an argument without a length.
- Fixed memory leak with large objects (:ticket:`256`).
- Make sure the internal ``_psycopg.so`` module can be imported stand-alone (to
allow modules juggling such as the one described in :ticket:`201`).

2.5.3

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Work around `pip issue 1630 <https://github.com/pypa/pip/issues/1630>`__
making installation via ``pip -e git+url`` impossible (:ticket:`18`).
- Copy operations correctly set the `cursor.rowcount` attribute
(:ticket:`180`).
- It is now possible to call `get_transaction_status()` on closed connections.
- Fixed unsafe access to object names causing assertion failures in
Python 3 debug builds (:ticket:`188`).
- Mark the connection closed if found broken on `poll()` (from :ticket:`192`
discussion)
- Fixed handling of dsn and closed attributes in connection subclasses
failing to connect (from :ticket:`192` discussion).
- Added arbitrary but stable order to `Range` objects, thanks to
Chris Withers (:ticket:`193`).
- Avoid blocking async connections on connect (:ticket:`194`). Thanks to
Adam Petrovich for the bug report and diagnosis.
- Don't segfault using poorly defined cursor subclasses which forgot to call
the superclass init (:ticket:`195`).
- Mark the connection closed when a Socket connection is broken, as it
happens for TCP connections instead (:ticket:`196`).
- Fixed overflow opening a lobject with an oid not fitting in a signed int
(:ticket:`203`).
- Fixed handling of explicit default ``cursor_factory=None`` in
`connection.cursor()` (:ticket:`210`).
- Fixed possible segfault in named cursors creation.
- Fixed debug build on Windows, thanks to James Emerton.

2.5.2

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed segfault pickling the exception raised on connection error
(:ticket:`170`).
- Meaningful connection errors report a meaningful message, thanks to
Alexey Borzenkov (:ticket:`173`).
- Manually creating `lobject` with the wrong parameter doesn't segfault
(:ticket:`187`).

2.5.1

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed build on Solaris 10 and 11 where the round() function is already
declared (:ticket:`146`).
- Fixed comparison of `Range` with non-range objects (:ticket:`164`).
Thanks to Chris Withers for the patch.
- Fixed double-free on connection dealloc (:ticket:`166`). Thanks to
Gangadharan S.A. for the report and fix suggestion.

2.5

-------------------------

New features:

- Added :ref:`JSON adaptation <adapt-json>`.
- Added :ref:`support for PostgreSQL 9.2 range types <adapt-range>`.
- `connection` and `cursor` objects can be used in ``with`` statements
as context managers as specified by recent |DBAPI|_ extension.
- Added `~psycopg2.extensions.Diagnostics` object to get extended info
from a database error.  Many thanks to Matthew Woodcraft for the
implementation (:ticket:`149`).
- Added `connection.cursor_factory` attribute to customize the default
object returned by `~connection.cursor()`.
- Added support for backward scrollable cursors. Thanks to Jon Nelson
for the initial patch (:ticket:`108`).
- Added a simple way to :ref:`customize casting of composite types
<adapt-composite>` into Python objects other than namedtuples.
Many thanks to Ronan Dunklau and Tobias Oberstein for the feature
development.
- `connection.reset()` implemented using :sql:`DISCARD ALL` on server
versions supporting it.

Bug fixes:

- Properly cleanup memory of broken connections (:ticket:`148`).
- Fixed bad interaction of ``setup.py`` with other dependencies in
Distribute projects on Python 3 (:ticket:`153`).

Other changes:

- Added support for Python 3.3.
- Dropped support for Python 2.4. Please use Psycopg 2.4.x if you need it.
- `~psycopg2.errorcodes` map updated to PostgreSQL 9.2.
- Dropped Zope adapter from source repository. ZPsycopgDA now has its own
project at <https://github.com/psycopg/ZPsycopgDA>.

2.4.6

^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed 'cursor()' arguments propagation in connection subclasses
and overriding of the 'cursor_factory' argument.  Thanks to
Corry Haines for the report and the initial patch (:ticket:`105`).
- Dropped GIL release during string adaptation around a function call
invoking a Python API function, which could cause interpreter crash.
Thanks to Manu Cupcic for the report (:ticket:`110`).
- Close a green connection if there is an error in the callback.
Maybe a harsh solution but it leaves the program responsive
(:ticket:`113`).
- 'register_hstore()', 'register_composite()', 'tpc_recover()' work with
RealDictConnection and Cursor (:ticket:`114`).
- Fixed broken pool for Zope and connections re-init across ZSQL methods
in the same request (:tickets:`123, 125, 142`).
- connect() raises an exception instead of swallowing keyword arguments
when a connection string is specified as well (:ticket:`131`).
- Discard any result produced by 'executemany()' (:ticket:`133`).
- Fixed pickling of FixedOffsetTimezone objects (:ticket:`135`).
- Release the GIL around PQgetResult calls after COPY (:ticket:`140`).
- Fixed empty strings handling in composite caster (:ticket:`141`).
- Fixed pickling of DictRow and RealDictRow objects.

Links

• PyPI: https://pypi.org/project/psycopg2
• Changelog: https://pyup.io/changelogs/psycopg2/
• Homepage: https://psycopg.org/