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Code Issues 25 Releases Wiki Activity

Added a note about SQLite versions before 3.3.6. Refs #7570. Thanks, ramiro.

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git-svn-id: http://code.djangoproject.com/svn/django/trunk@8950 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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Jacob Kaplan-Moss 2008-09-03 21:10:42 +00:00
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@ -238,6 +238,40 @@ of that field for more details, but usually this won't be something that will
matter unless you're printing out the field values and are expecting to see
``True`` and ``False.``.
.. _sqlite-notes:
SQLite notes
============
Versions of SQLite 3.3.5 and older `contain a bug`_ when handling ``ORDER BY``
parameters. This can cause problems when you use the ``select`` parameter for
the ``extra()`` QuerySet method. The bug can be identified by the error message
``OperationalError: ORDER BY terms must not be non-integer constants``. The
problem can be solved updating SQLite to version 3.3.6 or newer, possibly also
updating the ``pysqlite2`` Python module in the process.
.. _contain a bug: http://www.sqlite.org/cvstrac/tktview?tn=1768
This has a very low impact because 3.3.6 was released in April 2006, so most
current binary distributions for different platforms include newer version of
SQLite usable from Python through either the ``pysqlite2`` or the ``sqlite3``
modules.
However, in the case of Windows, the official binary distribution of the stable
release of Python 2.5 (2.5.2 as of now) includes SQLite 3.3.4 so the bug can
make itself evident in that platform. There are (as of Django 1.0) even three
tests in the Django test suite that will fail when run under this setup. As
described above, this can be solved by downloading and installing a newer
version of ``pysqlite2`` (``pysqlite-2.x.x.win32-py2.5.exe``) that includes and
uses a newer version of SQLite. Python 2.6 will ship with a newer version of
SQLite and so will no be affected by this issue.
If you are in such platform and find yourself in the need to update
``pysqlite``/SQLite, you will also need to manually modify the
``django/db/backends/sqlite3/base.py`` file in the Django source tree so it
attempts to import ``pysqlite2`` before that ``sqlite3`` and so it can take
advantage of the new ``pysqlite2``/SQLite versions.
.. _oracle-notes: