PostgreSQL
- URL
- 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
- Native Windows version is implemented in the PostgreSQL 8.x version, and just for Windows NT 4.0 / 2000 / XP / 2003. For running on other Windows platform or an older version than 8.0 there is a Cygwin version.
DB API 2.0 Drivers
PyGreSQL
- URL
- licence
- BSD-like (depends on mxDateTime, which may be GPL-incompatible)
- platforms
- Unix, win32
- Python versions
- 1.5.2 thru 2.4
- Maintenance
- Last version released is 3.8.1 (2006-06-05)
Now incorporates PoPy - see http://zope.org/Members/tm/Full_Announce
psycopg
- URL
- Licence
- GPL
- Platforms
- Unix, win32 (beta)
- Python versions
- Maintenance
- Active development, frequent updates (as of 10/2003)
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.
Offers a few advanced features over PoPy
Win32 binaries can be found here http://www.stickpeople.com/projects/python/psycopg/
pyPgSQL
- URL
- 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.
Supported Python Applications
- ["Zope"]
- three PostgreSQL drivers (using pgdb, included with the PostgreSQL distro, pypgsql, and psycopg) exist for ["PyDO"] (Python Data Objects)