Fixed #12286 -- Modified the test case added in r12828 so that it passes under Postgres.
Fixed #12286 -- Modified the test case added in r12828 so that it passes under Postgres.

git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@12846 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django