def map_all_keys(self, state):
            self._map_all = state
Given a column type (e.g. 'BLOB', 'VARCHAR'), returns the SQL necessary
dataset/ETHPy150Open peterbrittain/asciimatics/asciimatics/screen.py/_WindowsScreen.map_all_keys--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/db/backends/__init__.py/BaseDatabaseOperations.field_cast_sql