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[[TableOfContents]]
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== Masthead == = PostgreSQL =
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  licence:: BSD-like
  platforms:: Unix, win32 (Cygwin); a native win32 port is in the works		   licence:: BSD
  platforms:: Unix, win32 ([[http://www.postgresql.org/docs/faqs.FAQ_MINGW.html|NT-based Microsoft operating system]])

== Pros ==

From the [[http://www.postgresql.org/about/|features page]]:

 * Good compliance with SQL standards
 * Supports many SQL features
   * Foreign keys
   * Implements all SQL99 join types: inner join, left, right, full outer join, natural join
   * Subqueries
   * UNION and UNION ALL, INTERSECT and EXCEPT
   * Views
   * Triggers
 * Support for international character sets, multibyte character encodings, Unicode
 * Supports many languages for writing server-side functions/procedures and aggregates: Python, C, Perl, Tcl, PL/PgSQL, ...
 * ACID compliant
 * Support for rollback
 * Serializable transaction isolation
 * Multi-Version Concurrency Control (MVCC) for highly scalable concurrent applications

== Cons ==

 * [To be written]
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=== PyGresQL === === psycopg2 ===
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  URL:: http://www.druid.net/pygresql/   URL:: http://initd.org/psycopg/
  Licence:: LGPL
  Platforms:: Unix, win32
  Python versions:: 2.4, 2.5, 2.6, 2.7, 3.1, 3.2
  Maintenance:: Active development

Psycopg is the most popular PostgreSQL adapter for the Python programming language. At its core it fully implements the Python DB API 2.0 specifications. Several extensions allow access to many of the features offered by PostgreSQL.

Extended documentation available on http://initd.org/psycopg/docs/


=== PyGreSQL ===

  URL:: http://www.pygresql.org/
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  Python versions:: 1.5.2 thru 2.2

==== Extensions to DB API ====

  * Alternative old nonstandard PostgreSQL interface

==== Comments ====

=== PoPy ===

  URL:: http://popy.sourceforge.net
  licence:: GPL
  platforms:: Unix
  Python versions::

==== Extensions to DB API ====

==== Comments ====

=== psycopg ===

  URL:: http://initd.org/Software/psycopg
  licence:: GPL
  platforms:: Unix, win32 (beta)
  Python versions::

==== Extensions to DB API ====

  * dictfetchone(), dictfetchmany(), dictfechall() methods on the cursor object; these will return dictionaries instead of tuples, so you can access rows by name instead of by index

==== Comments ====

  * Written for heavily multithreaded applications in mind.		   Python versions:: 2.3 thru 2.6
  Maintenance:: Last version released is 4.0 (2009-01-01)
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  licence:: BSD-like
  platforms:: Unix, win32
  Python versions:: 2.0 thru 2.2		   Licence:: BSD-like (depends on mxDateTime, which may be GPL-incompatible)
  Platforms:: Unix, win32
  Python versions:: 2.1 thru 2.3
  Maintenance:: Active, sporatic (as of 10/2003)
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==== Comments ==== === mxODBC ===
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== Other Drivers ==   URL:: http://www.egenix.com/products/python/mxODBC/
  Licence:: eGenix Commercial License
  Platforms:: Windows, Linux, MacOS X, FreeBSD, Solaris, AIX
  Python versions:: 2.4 - 2.7
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=== driver name === mxODBC is compatible with the [[http://www.postgresql.org/ftp/odbc/versions/|PostgreSQL ODBC driver]] on Windows and Unix.
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  URL::
  licence::
  platforms::
  Python versions::		 Note that you have to enable the advanced option "Use bytea for lo" in case you want to work with BLOBs.
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==== Programming Model ====
=== pyodbc ===

  URL:: http://code.google.com/p/pyodbc
  License:: MIT
  Platforms:: Windows, Linux, MacOS X, FreeBSD, Solaris, Any (source provided)
  Python versions:: 2.4 - 2.6

Actively maintained Open Source project.

Precompiled binaries are available for Windows. Red``Hat Enterprise Linux, Centos, and Fedora have precompiled RPMs available in their Extras repositories.


=== py-postgresql ===

  URL:: http://python.projects.postgresql.org
  License:: BSD/MIT/PSF
  Platforms:: Any (windows installers available)
  Python version:: 3.x
  Maintenance:: Active development
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Python 3 port of pg_proboscis and friends. Pure Python with C optimizations. Prepared statement driven APIs, PG-API.(DB-API is there as well).

Written with efficiency and flexibility in mind. Data is streamed in when requested to do so, and always is streamed in under DB-API.

=== txpostgres ===

  URL:: https://launchpad.net/txpostgres/
  License:: MIT/X/Expat
  Platforms:: Any

A Twisted wrapper for asynchronous PostgreSQL connections.

Uses psycopg2, which exposes the async interfaces of the native PostgreSQL library, libpq.

Can be used as a drop-in replacement for Twisted's adbapi module when working with PostgreSQL. The only part that does not provide 100% compatibility is connection pooling, although pooling provided by txpostgres is very similar to the one Twisted adbapi offers.


=== pg8000 ===

  URL:: http://pybrary.net/pg8000/
  License:: BSD
  Platforms:: Any (windows installers available)
  Python version:: 2,5, 2.6, 3.x

pg8000 is somewhat distinctive in that it is written entirely in Python and does not rely on any external libraries

'''Important''': New [[http://code.google.com/p/pg8000/|maintenance fork]] including several bugfixes, compatibility features and extensibility enhancements similar to psycopg2 exposed functionalities. [[http://html.pg8000.googlecode.com/hg/index.html|Up to date documentation]]




=== PyPyODBC (Pure Python ODBC) ===

 URL::
 http://code.google.com/p/pypyodbc

 License:: MIT
 Platforms:: Windows, Linux
 Python versions:: 2.4 - 3.3


One pure Python script, runs on CPython / IronPython / PyPy , Version 3.3 / 3.2 / 3.1 / 2.4 / 2.5 / 2.6 / 2.7 , Win / Linux , 32 / 64 bit.

Almost totally same usage as pyodbc ( can be seen as a re-implementation of pyodbc in pure Python ).

Simple - the whole module is implemented in a single python script with less than 3000 lines.

=== mxODBC Connect ===

 URL:: http://www.egenix.com/products/python/mxODBCConnect/
 License:: eGenix Commercial License 1.3.0
 Platforms:: Client: all Python platforms; Server: Windows, Linux
 Python versions:: 2.5 - 2.7

mxODBC Connect is a commercial client-server product that allows connecting Python to ODBC compatible databases running on remote servers without requiring an ODBC driver on the client side. The product uses mxODBC on the server side and provides a highly portable Python library for the client side. As such it supports all database backend that mxODBC supports, but allows connecting to these from many different Python-supported platforms.

mxODBC Connect supports asynchronous query execution via the popular [[http://www.gevent.org/|gevent package]], provides secure certificate based authentication, SSL encrypted database connections, comes with full support for stored procedures, multiple result sets, Unicode, a common interface on all platforms and implements [[http://www.egenix.com/products/python/mxODBCConnect/#Features|many other useful features]].

mxODBC Connect Server is compatible with the [[http://www.postgresql.org/ftp/odbc/versions/|PostgreSQL ODBC drivers]].

=== Other Python Interfaces for PostgreSQL ===

These entries still need to be updated to the standard format (see above):

 * PoPy: http://sourceforge.net/projects/popy
  * No activity since 2003

 * pgasync: http://jamwt.com/pgasync/
  * Asynchronous and pure Python. Speed comparable to C bindings. Special support for Twisted.

 * bpgsql: http://barryp.org/software/bpgsql/
  * Barebones pure-Python PostgreSQL client

 * [[sipPQ]]

----
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== Pros ==

== Cons ==		  * [[Zope]]
 * DbDoc
 * three PostgreSQL drivers (using pgdb, included with the PostgreSQL distro, pypgsql, and psycopg) exist for [[PyDO]] (Python Data Objects)

PostgreSQL

URL

http://www.postgresql.org/

licence
BSD
platforms

Unix, win32 (NT-based Microsoft operating system)

Pros

From the features page:

  • Good compliance with SQL standards
  • Supports many SQL features
    • Foreign keys
    • Implements all SQL99 join types: inner join, left, right, full outer join, natural join
    • Subqueries
    • UNION and UNION ALL, INTERSECT and EXCEPT
    • Views
    • Triggers
  • Support for international character sets, multibyte character encodings, Unicode
  • Supports many languages for writing server-side functions/procedures and aggregates: Python, C, Perl, Tcl, PL/PgSQL, ...
  • ACID compliant
  • Support for rollback
  • Serializable transaction isolation
  • Multi-Version Concurrency Control (MVCC) for highly scalable concurrent applications

Cons

  • [To be written]

DB API 2.0 Drivers

psycopg2

URL

http://initd.org/psycopg/

Licence
LGPL
Platforms
Unix, win32
Python versions
2.4, 2.5, 2.6, 2.7, 3.1, 3.2
Maintenance
Active development

Psycopg is the most popular PostgreSQL adapter for the Python programming language. At its core it fully implements the Python DB API 2.0 specifications. Several extensions allow access to many of the features offered by PostgreSQL.

Extended documentation available on http://initd.org/psycopg/docs/

PyGreSQL

URL

http://www.pygresql.org/

licence
BSD-like
platforms
Unix, win32
Python versions
2.3 thru 2.6
Maintenance
Last version released is 4.0 (2009-01-01)

pyPgSQL

URL

http://pypgsql.sourceforge.net

Licence
BSD-like (depends on mxDateTime, which may be GPL-incompatible)
Platforms
Unix, win32
Python versions
2.1 thru 2.3
Maintenance
Active, sporatic (as of 10/2003)

Extensions to DB API

  • The fetch methods on cursors return an instances of PgResultSet, which you can use to access rows by index (like in DB-API), dictionary-like or with attributes. This feature can be turned off for a slight performance boost.

  • Support for PostgreSQL notifications in the low-level API.

mxODBC

URL

http://www.egenix.com/products/python/mxODBC/

Licence
eGenix Commercial License
Platforms
Windows, Linux, MacOS X, FreeBSD, Solaris, AIX
Python versions
2.4 - 2.7

mxODBC is compatible with the PostgreSQL ODBC driver on Windows and Unix.

Note that you have to enable the advanced option "Use bytea for lo" in case you want to work with BLOBs.

pyodbc

URL

http://code.google.com/p/pyodbc

License
MIT
Platforms
Windows, Linux, MacOS X, FreeBSD, Solaris, Any (source provided)
Python versions
2.4 - 2.6

Actively maintained Open Source project.

Precompiled binaries are available for Windows. RedHat Enterprise Linux, Centos, and Fedora have precompiled RPMs available in their Extras repositories.

py-postgresql

URL

http://python.projects.postgresql.org

License
BSD/MIT/PSF
Platforms
Any (windows installers available)
Python version
3.x
Maintenance
Active development

Comments

Python 3 port of pg_proboscis and friends. Pure Python with C optimizations. Prepared statement driven APIs, PG-API.(DB-API is there as well).

Written with efficiency and flexibility in mind. Data is streamed in when requested to do so, and always is streamed in under DB-API.

txpostgres

URL

https://launchpad.net/txpostgres/

License
MIT/X/Expat
Platforms
Any

A Twisted wrapper for asynchronous PostgreSQL connections.

Uses psycopg2, which exposes the async interfaces of the native PostgreSQL library, libpq.

Can be used as a drop-in replacement for Twisted's adbapi module when working with PostgreSQL. The only part that does not provide 100% compatibility is connection pooling, although pooling provided by txpostgres is very similar to the one Twisted adbapi offers.

pg8000

URL

http://pybrary.net/pg8000/

License
BSD
Platforms
Any (windows installers available)
Python version
2,5, 2.6, 3.x

pg8000 is somewhat distinctive in that it is written entirely in Python and does not rely on any external libraries

Important: New maintenance fork including several bugfixes, compatibility features and extensibility enhancements similar to psycopg2 exposed functionalities. Up to date documentation

PyPyODBC (Pure Python ODBC)

URL

http://code.google.com/p/pypyodbc

License
MIT
Platforms
Windows, Linux
Python versions
2.4 - 3.3

One pure Python script, runs on CPython / IronPython / PyPy , Version 3.3 / 3.2 / 3.1 / 2.4 / 2.5 / 2.6 / 2.7 , Win / Linux , 32 / 64 bit.

Almost totally same usage as pyodbc ( can be seen as a re-implementation of pyodbc in pure Python ).

Simple - the whole module is implemented in a single python script with less than 3000 lines.

mxODBC Connect

URL

http://www.egenix.com/products/python/mxODBCConnect/

License
eGenix Commercial License 1.3.0
Platforms
Client: all Python platforms; Server: Windows, Linux
Python versions
2.5 - 2.7

mxODBC Connect is a commercial client-server product that allows connecting Python to ODBC compatible databases running on remote servers without requiring an ODBC driver on the client side. The product uses mxODBC on the server side and provides a highly portable Python library for the client side. As such it supports all database backend that mxODBC supports, but allows connecting to these from many different Python-supported platforms.

mxODBC Connect supports asynchronous query execution via the popular gevent package, provides secure certificate based authentication, SSL encrypted database connections, comes with full support for stored procedures, multiple result sets, Unicode, a common interface on all platforms and implements many other useful features.

mxODBC Connect Server is compatible with the PostgreSQL ODBC drivers.

Other Python Interfaces for PostgreSQL

These entries still need to be updated to the standard format (see above):

Supported Python Applications

  • Zope

  • DbDoc

  • three PostgreSQL drivers (using pgdb, included with the PostgreSQL distro, pypgsql, and psycopg) exist for PyDO (Python Data Objects)

PostgreSQL (last edited 2021-03-31 06:49:56 by TonyLocke)

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