Percent sign in SQL statement behaves different with CursorDebugWrapper

Other backends might need to be changed, too:

user@host:~/_djangosvn/trunk/django/db/backends> find -name '*.py' | xargs grep -E 'def execute\('
./postgresql/base.py:    def execute(self, sql, params=()):
./sqlite3/base.py:    def execute(self, query, params=()):
./mysql/base.py:    def execute(self, query, args=None):
./oracle/base.py:    def execute(self, query, params=None):
./util.py:    def execute(self, sql, params=None):

This needs a test case, please. Something that fails beforehand and passes afterwards. You will see a few tests that set DEBUG=True and the start and reset it at the end to test things like this.

Note: the patch provided for MySQL backend on #10851 also made the same change to executemany, so when this is looked at for check in it should be investigated whether executemany needs fixing as well.

"""also made the same change to executemany"""

No I didn't ;-) I only replaced the parameter name "args" with "params" (which should've been "param_list" anyway, sloppy me). There was no actual change in the code for executemany.