def robotsrulesetOfDomain(self, domain):
		'''检查domain是否在数据库中,
			否 --> (False, None)
			是 --> (True, 数据库中存储的robots.txt内容)
		'''
		exist = False
		cur = self.conn.cursor()
		# 是否存在
		cur.execute("SELECT 1 FROM Domains WHERE domain=?", (domain,))
		if cur.fetchone() :
			exist = True
		# 存在的话,结果是什么
		cur.execute("SELECT rules FROM Domains,Rulesets "
			"WHERE domain=? AND Domains.did=Rulesets.did"
			,(domain,) )
		ruleset = cur.fetchone()
		return (exist, ruleset)
def __init__(
        self,
        credential: "AsyncTokenCredential",
        subscription_id: str,
        base_url: str = "https://management.azure.com",
        **kwargs: Any
    ) -> None:
        self._config = SqlVirtualMachineManagementClientConfiguration(credential=credential, subscription_id=subscription_id, **kwargs)
        self._client = AsyncARMPipelineClient(base_url=base_url, config=self._config, **kwargs)

        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
        self._serialize = Serializer(client_models)
        self._deserialize = Deserializer(client_models)
        self._serialize.client_side_validation = False
        self.availability_group_listeners = AvailabilityGroupListenersOperations(self._client, self._config, self._serialize, self._deserialize)
        self.operations = Operations(self._client, self._config, self._serialize, self._deserialize)
        self.sql_virtual_machine_groups = SqlVirtualMachineGroupsOperations(self._client, self._config, self._serialize, self._deserialize)
        self.sql_virtual_machines = SqlVirtualMachinesOperations(self._client, self._config, self._serialize, self._deserialize)