Added a test that shows the problem in #4470. This fails only for the mysql_old backend. Refs #4470.
Added a test that shows the problem in #4470. This fails only for the mysql_old
backend. Refs #4470.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%405617

Belgabor/django,Belgabor/django,Belgabor/django