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cc49aae245
* Re-enable pylint for superset/db_engines/hive.py * re-enable pylint for superset/db_engine_specs/elasticsearch.py * Re-enable superset/db_engine_specs/__init__.py * Re-enable pylint for superset/db_engine_specs/exasol.py
52 lines
2.0 KiB
Python
52 lines
2.0 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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"""Compatibility layer for different database engines
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This modules stores logic specific to different database engines. Things
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like time-related functions that are similar but not identical, or
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information as to expose certain features or not and how to expose them.
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For instance, Hive/Presto supports partitions and have a specific API to
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list partitions. Other databases like Vertica also support partitions but
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have different API to get to them. Other databases don't support partitions
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at all. The classes here will use a common interface to specify all this.
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The general idea is to use static classes and an inheritance scheme.
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"""
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import inspect
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import pkgutil
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from importlib import import_module
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from pathlib import Path
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from typing import Dict, Type
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from superset.db_engine_specs.base import BaseEngineSpec
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engines: Dict[str, Type[BaseEngineSpec]] = {}
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for (_, name, _) in pkgutil.iter_modules([Path(__file__).parent]): # type: ignore
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imported_module = import_module("." + name, package=__name__)
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for i in dir(imported_module):
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attribute = getattr(imported_module, i)
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if (
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inspect.isclass(attribute)
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and issubclass(attribute, BaseEngineSpec)
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and attribute.engine != ""
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):
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engines[attribute.engine] = attribute
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