def _alter_set_defaults(self, field, name, params, sqls):
        type = params['type']
        #  MySQL does not support defaults for geometry columns also
        is_geom = True in [type.find(t) > -1 for t in self.geom_types]
        is_text = True in [type.find(t) > -1 for t in self.text_types]
        if not is_geom and not is_text:
            super(DatabaseOperations, self)._alter_set_defaults(field, name, params, sqls)
MySQL does not support defaults on text or blob columns.
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/South-1.0.2/south/db/mysql.py/DatabaseOperations._alter_set_defaults