Commit 713f2349 authored by Claude Paroz's avatar Claude Paroz
Browse files

Required MySQLdb >= 1.2.5 for fractional seconds support 

On MySQLdb < 1.2.5, MySQLdb returns None when fetching datetime/time
values with fractional seconds.
See https://github.com/farcepest/MySQLdb1/issues/24
parent 22da5f88

django/db/backends/mysql/base.py

+3 −1
Original line number Diff line number Diff line
@@ -211,7 +211,9 @@ class DatabaseFeatures(BaseDatabaseFeatures): 


    @cached_property

    def supports_microsecond_precision(self):

        return self.connection.mysql_version >= (5, 6, 4)

        # See https://github.com/farcepest/MySQLdb1/issues/24 for the reason

        # about requiring MySQLdb 1.2.5

        return self.connection.mysql_version >= (5, 6, 4) and Database.version_info >= (1, 2, 5)



    @cached_property

    def has_zoneinfo_database(self):

docs/ref/databases.txt

+7 −2
Original line number Diff line number Diff line
@@ -503,7 +503,11 @@ Fractional seconds support for Time and DateTime fields 


MySQL 5.6.4 and later can store fractional seconds, provided that the

column definition includes a fractional indication (e.g. ``DATETIME(6)``).

Earlier versions do not support them at all.

Earlier versions do not support them at all. In addition, versions of MySQLdb

older than 1.2.5 have `a bug`_ that also prevents the use of fractional seconds

with MySQL.



.. _a bug: https://github.com/farcepest/MySQLdb1/issues/24



Django will not upgrade existing columns to include fractional seconds if the

database server supports it. If you want to enable them on an existing database,
@@ -521,7 +525,8 @@ or using a :class:`~django.db.migrations.operations.RunSQL` operation in a 
    ``time`` values when using the MySQL backend. Now it lets the database

    decide whether it should drop that part of the value or not. By default, new

    ``DateTimeField`` or ``TimeField`` columns are now created with fractional

    seconds support on MySQL 5.6.4 or later.

    seconds support on MySQL 5.6.4 or later with either mysqlclient or

    MySQLdb 1.2.5 or later.



``TIMESTAMP`` columns

~~~~~~~~~~~~~~~~~~~~~