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Diffstat (limited to 'docs/ref')
| -rw-r--r-- | docs/ref/databases.txt | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/docs/ref/databases.txt b/docs/ref/databases.txt index c271946bb7..8fbe4125c9 100644 --- a/docs/ref/databases.txt +++ b/docs/ref/databases.txt @@ -128,7 +128,7 @@ Version support Django supports MySQL 5.0.3 and higher. `MySQL 5.0`_ adds the ``information_schema`` database, which contains detailed -data on all database schema. Django's ``inspectdb`` feature uses this feature. +data on all database schema. Django's ``inspectdb`` feature uses it. .. versionchanged:: 1.5 The minimum version requirement of MySQL 5.0.3 was set in Django 1.5. @@ -141,6 +141,8 @@ MySQL when using the MyISAM storage engine, see the next section. .. _MySQL: http://www.mysql.com/ .. _MySQL 5.0: http://dev.mysql.com/doc/refman/5.0/en/index.html +.. _mysql-storage-engines: + Storage engines --------------- @@ -353,6 +355,21 @@ via the :class:`~django.db.models.Options.db_table` parameter. .. _known issues: http://bugs.mysql.com/bug.php?id=48875 +Savepoints +---------- + +Both the Django ORM and MySQL (when using the InnoDB :ref:`storage engine +<mysql-storage-engines>`) support database :ref:`savepoints +<topics-db-transactions-savepoints>`, but this feature wasn't available in +Django until version 1.4 when such supports was added. + +If you use the MyISAM storage engine please be aware of the fact that you will +receive database-generated errors if you try to use the :ref:`savepoint-related +methods of the transactions API <topics-db-transactions-savepoints>`. The reason +for this is that detecting the storage engine of a MySQL database/table is an +expensive operation so it was decided it isn't worth to dynamically convert +these methods in no-op's based in the results of such detection. + Notes on specific fields ------------------------ |