superset cache 源码
superset cache 代码
文件路径：/superset/models/cache.py
# Licensed to the Apache Software Foundation (ASF) under one
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# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
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from datetime import datetime
from flask_appbuilder import Model
from sqlalchemy import Column, DateTime, Integer, String
class CacheKey(Model): # pylint: disable=too-few-public-methods
"""Stores cache key records for the superset visualization."""
__tablename__ = "cache_keys"
id = Column(Integer, primary_key=True)
cache_key = Column(String(256), nullable=False)
cache_timeout = Column(Integer, nullable=True)
datasource_uid = Column(String(64), nullable=False, index=True)
created_on = Column(DateTime, default=datetime.now, nullable=True)
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