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https://github.com/apache/superset.git
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95291facff
* Refactor db_engine_specs into package * Rename bigquery class and add epoch funcs * Fix flake8 errors * Dynamically load all engine specs * Fix linting errors and unit tests * Implement Snowflake epoch time funcs * Implement Teradata epoch time func * Fix presto datasource query and remove unused import * Fix broken datasource query * Add mypy ignore for false positive * Add missing license files * Make create_time_grains_tuple public * Fix flake8 quote * Fix incorrect licence header
65 lines
2.3 KiB
Python
65 lines
2.3 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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# pylint: disable=C,R,W
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from urllib import parse
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from superset.db_engine_specs.base import BaseEngineSpec
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class DrillEngineSpec(BaseEngineSpec):
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"""Engine spec for Apache Drill"""
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engine = 'drill'
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time_grain_functions = {
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None: '{col}',
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'PT1S': "NEARESTDATE({col}, 'SECOND')",
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'PT1M': "NEARESTDATE({col}, 'MINUTE')",
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'PT15M': "NEARESTDATE({col}, 'QUARTER_HOUR')",
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'PT0.5H': "NEARESTDATE({col}, 'HALF_HOUR')",
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'PT1H': "NEARESTDATE({col}, 'HOUR')",
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'P1D': "NEARESTDATE({col}, 'DAY')",
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'P1W': "NEARESTDATE({col}, 'WEEK_SUNDAY')",
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'P1M': "NEARESTDATE({col}, 'MONTH')",
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'P0.25Y': "NEARESTDATE({col}, 'QUARTER')",
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'P1Y': "NEARESTDATE({col}, 'YEAR')",
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}
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# Returns a function to convert a Unix timestamp in milliseconds to a date
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@classmethod
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def epoch_to_dttm(cls):
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return cls.epoch_ms_to_dttm().replace('{col}', '({col}*1000)')
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@classmethod
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def epoch_ms_to_dttm(cls):
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return 'TO_DATE({col})'
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@classmethod
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def convert_dttm(cls, target_type, dttm):
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tt = target_type.upper()
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if tt == 'DATE':
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return "CAST('{}' AS DATE)".format(dttm.isoformat()[:10])
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elif tt == 'TIMESTAMP':
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return "CAST('{}' AS TIMESTAMP)".format(
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dttm.strftime('%Y-%m-%d %H:%M:%S'))
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return "'{}'".format(dttm.strftime('%Y-%m-%d %H:%M:%S'))
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@classmethod
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def adjust_database_uri(cls, uri, selected_schema):
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if selected_schema:
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uri.database = parse.quote(selected_schema, safe='')
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return uri
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