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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
53 lines
2.1 KiB
Python
53 lines
2.1 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 superset.db_engine_specs.base import BaseEngineSpec
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class ClickHouseEngineSpec(BaseEngineSpec):
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"""Dialect for ClickHouse analytical DB."""
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engine = 'clickhouse'
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time_secondary_columns = True
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time_groupby_inline = True
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time_grain_functions = {
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None: '{col}',
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'PT1M': 'toStartOfMinute(toDateTime({col}))',
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'PT5M': 'toDateTime(intDiv(toUInt32(toDateTime({col})), 300)*300)',
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'PT10M': 'toDateTime(intDiv(toUInt32(toDateTime({col})), 600)*600)',
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'PT15M': 'toDateTime(intDiv(toUInt32(toDateTime({col})), 900)*900)',
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'PT0.5H': 'toDateTime(intDiv(toUInt32(toDateTime({col})), 1800)*1800)',
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'PT1H': 'toStartOfHour(toDateTime({col}))',
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'P1D': 'toStartOfDay(toDateTime({col}))',
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'P1W': 'toMonday(toDateTime({col}))',
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'P1M': 'toStartOfMonth(toDateTime({col}))',
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'P0.25Y': 'toStartOfQuarter(toDateTime({col}))',
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'P1Y': 'toStartOfYear(toDateTime({col}))',
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}
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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 "toDate('{}')".format(dttm.strftime('%Y-%m-%d'))
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if tt == 'DATETIME':
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return "toDateTime('{}')".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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