09.10.2015       Выпуск 94 (05.10.2015 - 11.10.2015)       Релизы

psycopg2 - 2.7

Python интерфейс для PostgreSQL. Изменения описаны по ссылке https://allmychanges.com/p/python/psycopg2/#2.7. Скачать можно по ссылке: http://pypi.python.org/pypi/psycopg2/


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Python PostgreSQL adapter
Last update was:
4 hours, 54 minutes ago
Time to next update:
6 hours, 29 minutes
  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • 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`).
    • Added ~psycopg2.extensions.quote_ident() function (:ticket:`#359`).
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Report the server response status on errors (such as :ticket:`#281`).
    • The ~psycopg2.extras.wait_select callback allows interrupting a long-running query in an interactive shell using Ctrl-C (:ticket:`#333`).
    • Raise !NotSupportedError on unhandled server response status (:ticket:`#352`).
    • Fixed !PersistentConnectionPool on Python 3 (:ticket:`#348`).
    • 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`).
  • Discovered at May 29, 2015
    Source: NEWS
  • Discovered at April 29, 2015
    Source: NEWS

    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`).
  • Discovered at Oct. 9, 2015
    Source: NEWS
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • 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`).
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Work around pip issue #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.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • 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`).
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • 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.
  • Discovered at April 29, 2015
    Source: NEWS

    New features:

    • Added JSON adaptation.
    • Added support for PostgreSQL 9.2 range types.
    • 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 customize casting of composite types 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 <http://github.com/psycopg/ZPsycopgDA>.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • 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.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • The close() methods on connections and cursors don’t raise exceptions if called on already closed objects.
    • Fixed fetchmany() with no argument in cursor subclasses (:ticket:`#84`).
    • Use lo_creat() instead of lo_create() when possible for better interaction with pgpool-II (:ticket:`#88`).
    • Error and its subclasses are picklable, useful for multiprocessing interaction (:ticket:`#90`).
    • Better efficiency and formatting of timezone offset objects thanks to Menno Smits (:tickets:`#94, #95`).
    • Fixed ‘rownumber’ during iteration on cursor subclasses. Regression introduced in 2.4.4 (:ticket:`#100`).
    • Added support for ‘inet’ arrays.
    • Fixed ‘commit()’ concurrency problem (:ticket:`#103`).
    • Codebase cleaned up using the GCC Python plugin’s static analysis tool, which has revealed several unchecked return values, possible NULL dereferences, reference counting problems. Many thanks to David Malcolm for the useful tool and the assistance provided using it.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • ‘register_composite()’ also works with the types implicitly defined after a table row, not only with the ones created by ‘CREATE TYPE’.
    • Values for the isolation level symbolic constants restored to what they were before release 2.4.2 to avoid breaking apps using the values instead of the constants.
    • Named DictCursor/RealDictCursor honour itersize (:ticket:`#80`).
    • Fixed rollback on error on Zope (:ticket:`#73`).
    • Raise ‘DatabaseError’ instead of ‘Error’ with empty libpq errors, consistently with other disconnection-related errors: regression introduced in release 2.4.1 (:ticket:`#82`).
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • connect() supports all the keyword arguments supported by the database
    • Added ‘new_array_type()’ function for easy creation of array typecasters.
    • Added support for arrays of hstores and composite types (:ticket:`#66`).
    • Fixed segfault in case of transaction started with connection lost (and possibly other events).
    • Fixed adaptation of Decimal type in sub-interpreters, such as in certain mod_wsgi configurations (:ticket:`#52`).
    • Rollback connections in transaction or in error before putting them back into a pool. Also discard broken connections (:ticket:`#62`).
    • Lazy import of the slow uuid module, thanks to Marko Kreen.
    • Fixed NamedTupleCursor.executemany() (:ticket:`#65`).
    • Fixed –static-libpq setup option (:ticket:`#64`).
    • Fixed interaction between RealDictCursor and named cursors (:ticket:`#67`).
    • Dropped limit on the columns length in COPY operations (:ticket:`#68`).
    • Fixed reference leak with arguments referenced more than once in queries (:ticket:`#81`).
    • Fixed typecasting of arrays containing consecutive backslashes.
    • ‘errorcodes’ map updated to PostgreSQL 9.1.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Added ‘set_session()’ method and ‘autocommit’ property to the connection. Added support for read-only sessions and, for PostgreSQL 9.1, for the “repeatable read” isolation level and the “deferrable” transaction property.
    • Psycopg doesn’t execute queries at connection time to find the default isolation level.
    • Fixed bug with multithread code potentially causing loss of sync with the server communication or lock of the client (:ticket:`#55`).
    • Don’t fail import if mx.DateTime module can’t be found, even if its support was built (:ticket:`#53`).
    • Fixed escape for negative numbers prefixed by minus operator (:ticket:`#57`).
    • Fixed refcount issue during copy. Reported and fixed by Dave Malcolm (:ticket:`#58`, Red Hat Bug 711095).
    • Trying to execute concurrent operations on the same connection through concurrent green thread results in an error instead of a deadlock.
    • Fixed detection of pg_config on Window. Report and fix, plus some long needed setup.py cleanup by Steve Lacy: thanks!
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Use own parser for bytea output, not requiring anymore the libpq 9.0 to parse the hex format.
    • Don’t fail connection if the client encoding is a non-normalized variant. Issue reported by Peter Eisentraut.
    • Correctly detect an empty query sent to the backend (:ticket:`#46`).
    • Fixed a SystemError clobbering libpq errors raised without SQLSTATE. Bug vivisectioned by Eric Snow.
    • Fixed interaction between NamedTuple and server-side cursors.
    • Allow to specify –static-libpq on setup.py command line instead of just in ‘setup.cfg’. Patch provided by Matthew Ryan (:ticket:`#48`).
  • Discovered at April 29, 2015
    Source: NEWS

    New features and changes:

    • Added support for Python 3.1 and 3.2. The conversion has also brought several improvements:
      • Added ‘b’ and ‘t’ mode to large objects: write can deal with both bytes strings and unicode; read can return either bytes strings or decoded unicode.
      • COPY sends Unicode data to files implementing ‘io.TextIOBase’.
      • Improved PostgreSQL-Python encodings mapping.
      • Added a few missing encodings: EUC_CN, EUC_JIS_2004, ISO885910, ISO885916, LATIN10, SHIFT_JIS_2004.
      • Dropped repeated dictionary lookups with unicode query/parameters.
    • Improvements to the named cursors:
      • More efficient iteration on named cursors, fetching ‘itersize’ records at time from the backend.
      • The named cursors name can be an invalid identifier.
    • Improvements in data handling:
      • Added ‘register_composite()’ function to cast PostgreSQL composite types into Python tuples/namedtuples.
      • Adapt types ‘bytearray’ (from Python 2.6), ‘memoryview’ (from Python 2.7) and other objects implementing the “Revised Buffer Protocol” to ‘bytea’ data type.
      • The ‘hstore’ adapter can work even when the data type is not installed in the ‘public’ namespace.
      • Raise a clean exception instead of returning bad data when receiving bytea in ‘hex’ format and the client libpq can’t parse them.
      • Empty lists correctly roundtrip Python -> PostgreSQL -> Python.
    • Other changes:
      • ‘cursor.description’ is provided as named tuples if available.
      • The build script refuses to guess values if ‘pg_config’ is not found.
      • Connections and cursors are weakly referenceable.

    Bug fixes:

    • Fixed adaptation of None in composite types (:ticket:`#26`). Bug report by Karsten Hilbert.
    • Fixed several reference leaks in less common code paths.
    • Fixed segfault when a large object is closed and its connection no more available.
    • Added missing icon to ZPsycopgDA package, not available in Zope 2.12.9 (:ticket:`#30`). Bug report and patch by Pumukel.
    • Fixed conversion of negative infinity (:ticket:`#40`). Bug report and patch by Marti Raudsepp.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Fixed segfault with middleware not passing DateStyle to the client (:ticket:`#24`). Bug report and patch by Marti Raudsepp.
  • Discovered at Oct. 9, 2015
    Source: NEWS
  • Discovered at April 29, 2015
    Source: NEWS

    psycopg 2.3 aims to expose some new features introduced in PostgreSQL 9.0.

    Main new features:

    • dict to hstore adapter and hstore to dict typecaster, using both 9.0 and pre-9.0 syntax.
    • Two-phase commit protocol support as per DBAPI specification.
    • Support for payload in notifications received from the backend.
    • namedtuple-returning cursor.
    • Query execution cancel.

    Other features and changes:

    • Dropped support for protocol 2: Psycopg 2.3 can only connect to PostgreSQL servers with version at least 7.4.
    • Don’t issue a query at every connection to detect the client encoding and to set the datestyle to ISO if it is already compatible with what expected.
    • mogrify() now supports unicode queries.
    • Subclasses of a type that can be adapted are adapted as the superclass.
    • errorcodes knows a couple of new codes introduced in PostgreSQL 9.0.
    • Dropped deprecated Psycopg “own quoting”.
    • Never issue a ROLLBACK on close/GC. This behaviour was introduced as a bug in release 2.2, but trying to send a command while being destroyed has been considered not safe.

    Bug fixes:

    • Fixed use of PQfreemem instead of free in binary typecaster.
    • Fixed access to freed memory in conn_get_isolation_level().
    • Fixed crash during Decimal adaptation with a few 2.5.x Python versions (:ticket:`#7`).
    • Fixed notices order (:ticket:`#9`).
  • Discovered at Oct. 9, 2015
    Source: NEWS

    Bux fixes:

    • the call to logging.basicConfig() in pool.py has been dropped: it was messing with some projects using logging (and a library should not initialize the logging system anyway.)
    • psycopg now correctly handles time zones with seconds in the UTC offset. The old register_tstz_w_secs() function is deprecated and will raise a warning if called.
    • Exceptions raised by the column iterator are propagated.
    • Exceptions raised by executemany() iterators are propagated.
  • Discovered at Oct. 9, 2015
    Source: NEWS
  • Discovered at April 29, 2015
    Source: NEWS

    This is the first release of the new 2.2 series, supporting not just one but two different ways of executing asynchronous queries, thanks to Jan and Daniele (with a little help from me and others, but they did 99% of the work so they deserve their names here in the news.)

    psycopg now supports both classic select() loops and “green” coroutine libraries. It is all in the documentation, so just point your browser to doc/html/advanced.html.

    Other new features:

    • truncate() method for lobjects.
    • COPY functions are now a little bit faster.
    • All builtin PostgreSQL to Python typecasters are now available from the psycopg2.extensions module.
    • Notifications from the backend are now available right after the execute() call (before client code needed to call isbusy() to ensure NOTIFY reception.)
    • Better timezone support.
    • Lots of documentation updates.

    Bug fixes:

    • Fixed some gc/refcounting problems.
    • Fixed reference leak in NOTIFY reception.
    • Fixed problem with PostgreSQL not casting string literals to the correct types in some situations: psycopg now add an explicit cast to dates, times and bytea representations.
    • Fixed TimestampFromTicks() and TimeFromTicks() for seconds >= 59.5.
    • Fixed spurious exception raised when calling C typecasters from Python ones.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • Support for adapting tuples to PostgreSQL arrays is now enabled by default and does not require importing psycopg2.extensions anymore.
    • “can’t adapt” error message now includes full type information.
    • Thank to Daniele Varrazzo (piro) psycopg2’s source package now includes full documentation in HTML and plain text format.

    Bug fixes:

    • No loss of precision when using floats anymore.
    • decimal.Decimal “nan” and “infinity” correctly converted to PostgreSQL numeric NaN values (note that PostgreSQL numeric type does not support infinity but just NaNs.)
    • psycopg2.extensions now includes Binary.

    It seems we’re good citizens of the free software ecosystem and that big big big companies and people ranting on the pgsql-hackers mailing list we’ll now not dislike us. g (See LICENSE file for the details.)

  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • Support for UUID arrays.
    • It is now possible to build psycopg linking to a static libpq library.

    Bug fixes:

    • Fixed a deadlock related to using the same connection with multiple cursors from different threads.
    • Builds again with MSVC.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • The connection object now has a reset() method that can be used to reset the connection to its default state.

    Bug fixes:

    • copy_to() and copy_from() now accept a much larger number of columns.
    • Fixed PostgreSQL version detection.
    • Fixed ZPsycopgDA version check.
    • Fixed regression in ZPsycopgDA that made it behave wrongly when receiving serialization errors: now the query is re-issued as it should be by propagating the correct exception to Zope.
    • Writing “large” large objects should now work.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • DictRow and RealDictRow now use less memory. If you inherit on them remember to set __slots__ for your new attributes or be prepare to go back to old memory usage.

    Bug fixes:

    • Fixed exception in setup.py.
    • More robust detection of PostgreSQL development versions.
    • Fixed exception in RealDictCursor, introduced in 2.0.10.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • A specialized type-caster that can parse time zones with seconds is now available. Note that after enabling it (see extras.py) “wrong” time zones will be parsed without raising an exception but the result will be rounded.
    • DictCursor can be used as a named cursor.
    • DictRow now implements more dict methods.
    • The connection object now expose PostgreSQL server version as the .server_version attribute and the protocol version used as .protocol_version.
    • The connection object has a .get_parameter_status() methods that can be used to obtain useful information from the server.

    Bug fixes:

    • None is now correctly always adapted to NULL.
    • Two double memory free errors provoked by multithreading and garbage collection are now fixed.
    • Fixed usage of internal Python code in the notice processor; this should fix segfaults when receiving a lot of notices in multithreaded programs.
    • Should build again on MSVC and Solaris.
    • Should build with development versions of PostgreSQL (ones with -devel version string.)
    • Fixed some tests that failed even when psycopg was right.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • COPY TO/COPY FROM queries now can be of any size and psycopg will correctly quote separators.
    • float values Inf and NaN are now correctly handled and can round-trip to the database.
    • executemany() now return the numer of total INSERTed or UPDATEd rows. Note that, as it has always been, executemany() should not be used to execute multiple SELECT statements and while it will execute the statements without any problem, it will return the wrong value.
    • copy_from() and copy_to() can now use quoted separators.
    • “import psycopg2.extras” to get UUID support.

    Bug fixes:

    • register_type() now works on connection and cursor subclasses.
    • fixed a memory leak when using lobjects.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    New features:

    • The connection object now has a get_backend_pid() method that returns the current PostgreSQL connection backend process PID.
    • The PostgreSQL large object API has been exposed through the Cursor.lobject() method.

    Bug fixes:

    • Some fixes to ZPsycopgDA have been merged from the Debian package.
    • A memory leak was fixed in Cursor.executemany().
    • A double free was fixed in pq_complete_error(), that caused crashes under some error conditions.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    Improved error handling:

    • All instances of psycopg2.Error subclasses now have pgerror, pgcode and cursor attributes. They will be set to None if no value is available.
    • Exception classes are now chosen based on the SQLSTATE value from the result. (#184)
    • The commit() and rollback() methods now set the pgerror and pgcode attributes on exceptions. (#152)
    • errors from commit() and rollback() are no longer considered fatal. (#194)
    • If a disconnect is detected during execute(), an exception will be raised at that point rather than resulting in “ProgrammingError: no results to fetch” later on. (#186)

    Better PostgreSQL compatibility:

    • If the server uses standard_conforming_strings, perform appropriate quoting.
    • BC dates are now handled if psycopg is compiled with mxDateTime support. If using datetime, an appropriate ValueError is raised. (#203)

    Other bug fixes:

    • If multiple sub-interpreters are in use, do not share the Decimal type between them. (#192)
    • Buffer objects obtained from psycopg are now accepted by psycopg too, without segfaulting. (#209)
    • A few small changes were made to improve DB-API compatibility. All the dbapi20 tests now pass.


    • The PSYCOPG_DISPLAY_SIZE option is now off by default. This means that display size will always be set to “None” in cursor.description. Calculating the display size was expensive, and infrequently used so this should improve performance.
    • New QueryCanceledError and TransactionRollbackError exceptions have been added to the psycopg2.extensions module. They can be used to detect statement timeouts and deadlocks respectively.
    • Cursor objects now have a “closed” attribute. (#164)
    • If psycopg has been built with debug support, it is now necessary to set the PSYCOPG_DEBUG environment variable to turn on debug spew.
  • Discovered at Oct. 9, 2015
    Source: NEWS

    Better support for PostgreSQL, Python and win32:

    • full support for PostgreSQL 8.2, including NULLs in arrays
    • support for almost all existing PostgreSQL encodings
    • full list of PostgreSQL error codes available by importing the psycopg2.errorcodes module
    • full support for Python 2.5 and 64 bit architectures
    • better build support on win32 platform

    Support for per-connection type-casters (used by ZPsycopgDA too, this fixes a long standing bug that made different connections use a random set of date/time type-casters instead of the configured one.)

    Better management of times and dates both from Python and in Zope.

    copy_to and copy_from now take an extra “columns” parameter.

    Python tuples are now adapted to SQL sequences that can be used with the “IN” operator by default if the psycopg2.extensions module is imported (i.e., the SQL_IN adapter was moved from extras to extensions.)

    Fixed some small buglets and build glitches:

    • removed double mutex destroy
    • removed all non-constant initializers
    • fixed PyObject_HEAD declarations to avoid memory corruption on 64 bit architectures
    • fixed several Python API calls to work on 64 bit architectures
    • applied compatibility macros from PEP 353
    • now using more than one argument format raise an error instead of a segfault
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Now it really, really builds on MSVC and older gcc versions.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Fixed various buglets such as:
      • segfault when passing an empty string to Binary()
      • segfault on null queries
      • segfault and bad keyword naming in .executemany()
      • OperationalError in connection objects was always None
    • Various changes to ZPsycopgDA to make it more zope2.9-ish.
    • connect() now accept both integers and strings as port parameter
  • Discovered at Oct. 9, 2015
    Source: NEWS
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Fixed various buglets and a memory leak (see ChangeLog for details)
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Fixed a bug in array typecasting that sometimes made psycopg forget about the last element in the array.
    • Fixed some minor buglets in string memory allocations.
    • Builds again with compilers different from gcc (#warning about PostgreSQL version is issued only if __GCC__ is defined.)
  • Discovered at Oct. 9, 2015
    Source: NEWS
  • Discovered at April 29, 2015
    Source: NEWS
    • Officially in beta (i.e., no new features will be added.)
    • Array support: list objects can be passed as bound variables and are correctly returned for array columns.
    • Added the psycopg.psycopg1 compatibility module (if you want instant psycopg 1 compatibility just “from psycopg import psycopg1 as psycopg”.)
    • Complete support for BYTEA columns and buffer objects.
    • Added error codes to error messages.
    • The AsIs adapter is now exported by default (also Decimal objects are adapted using the AsIs adapter (when str() is called on them they already format themselves using the right precision and scale.)
    • The connect() function now takes “connection_factory” instead of “factory” as keyword argument.
    • New setup.py code to build on win32 using mingw and better error messages on missing datetime headers,
    • Internal changes that allow much better user-defined type casters.
    • A lot of bugfixes (binary, datetime, 64 bit arches, GIL, .executemany())
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Added missing .executemany() method.
    • Optimized type cast from PostgreSQL to Python (psycopg should be even faster than before.)
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • .rowcount should be ok and in sync with psycopg 1.
    • Implemented the new COPY FROM/COPY TO code when connection to the backend using libpq protocol 3 (this also removes all asprintf calls: build on win32 works again.) A protocol 3-enabled psycopg can connect to an old protocol 2 database and will detect it and use the right code.
    • getquoted() called for real by the mogrification code.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • ‘cursor’ argument in .cursor() connection method renamed to ‘cursor_factory’.
    • changed ‘tuple_factory’ cursor attribute name to ‘row_factory’.
    • the .cursor attribute is gone and connections and cursors are properly gc-managed.
    • fixes to the async core.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • The adapt() function now fully supports the adaptation protocol described in PEP 246. Note that the adapters registry now is indexed by (type, protocol) and not by type alone. Change your adapters accordingly.
    • More configuration options moved from setup.py to setup.cfg.
    • Fixed two memory leaks: one in cursor deallocation and one in row fetching (.fetchXXX() methods.)
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • Added simple pooling code (psycopg.pool module); see the reworked examples/threads.py for example code.
    • Added DECIMAL typecaster to convert postgresql DECIMAL and NUMERIC types (i.e, all types with an OID of NUMERICOID.) Note that the DECIMAL typecaster does not set scale and precision on the created objects but uses Python defaults.
    • ZPsycopgDA back in and working using the new pooling code.
    • Isn’t that enough? :)
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • added support for UNICODE queries.

    • added UNICODE typecaster; to activate it just do:


      Note that the UNICODE typecaster override the STRING one, so it is not activated by default.

    • cursors now really support the iterator protocol.

    • solved the rounding errors in time conversions.

    • now cursors support .fileno() and .isready() methods, to be used in select() calls.

    • .copy_from() and .copy_in() methods are back in (still using the old protocol, will be updated to use new one in next release.)

    • fixed memory corruption bug reported on win32 platform.

  • Discovered at Oct. 9, 2015
    Source: NEWS
    • added support for tuple factories in cursor objects (removed factory argument in favor of a .tuple_factory attribute on the cursor object); see the new module psycopg.extras for a cursor (DictCursor) that return rows as objects that support indexing both by position and column name.
    • added support for tzinfo objects in datetime.timestamp objects: the PostgreSQL type “timestamp with time zone” is converted to datetime.timestamp with a FixedOffsetTimezone initialized as necessary.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • sslmode parameter from 1.1.x
    • various datetime conversion improvements.
    • now psycopg should compile without mx or without native datetime (not both, obviously.)
    • included various win32/MSVC fixes (pthread.h changes, winsock2 library, include path in setup.py, etc.)
    • ported interval fixes from 1.1.14/1.1.15.
    • the last query executed by a cursor is now available in the .query attribute.
    • conversion of unicode strings to backend encoding now uses a table (that still need to be filled.)
    • cursors now have a .mogrify() method that return the query string instead of executing it.
    • connection objects now have a .dsn read-only attribute that holds the connection string.
    • moved psycopg C module to _psycopg and made psycopg a python module: this allows for a neat separation of DBAPI-2.0 functionality and psycopg extensions; the psycopg namespace will be also used to provide python-only extensions (like the pooling code, some ZPsycopgDA support functions and the like.)
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • initial working support for unicode bound variables: UTF-8 and latin-1 backend encodings are natively supported (and the encoding.py example even works!)
    • added .set_client_encoding() method on the connection object.
    • added examples: encoding.py, binary.py, lastrowid.py.
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • better typecasting:
      • DateTimeDelta used for postgresql TIME (merge from 1.1)
      • BYTEA now is converted to a real buffer object, not to a string
    • buffer objects are now adapted into Binary objects automatically.
    • ported scroll method from 1.1 (DBAPI-2.0 extension for cursors)
    • initial support for some DBAPI-2.0 extensions:
      • .rownumber attribute for cursors
      • .connection attribute for cursors
      • .next() and .__iter__() methods to have cursors support the iterator protocol
      • all exception objects are exported to the connection object
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • implemented microprotocols to adapt arbitrary types to the interface used by psycopg to bind variables in execute;
    • moved qstring, pboolean and mxdatetime to the new adapter layout (binary is still missing; python 2.3 datetime needs to be written).
  • Discovered at Oct. 9, 2015
    Source: NEWS
    • reorganized the whole source tree;
    • async core is in place;
    • splitted QuotedString objects from mx stuff;
    • dropped autotools and moved to pythonic setup.py (needs work.)

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