def has_column(self, table, column):
        column = column.lower()

        return column in list(map(lambda x: x.lower(), self.get_colummn_listing()))
Delete a provider firewall rule from the database.
dataset/ETHPy150Open sdispater/orator/orator/schema/builder.py/SchemaBuilder.has_column--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/db/api.py/provider_fw_rule_destroy