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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
2.5 KiB
Python
65 lines
2.5 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.postgres import PostgresBaseEngineSpec
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class SnowflakeEngineSpec(PostgresBaseEngineSpec):
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engine = 'snowflake'
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force_column_alias_quotes = True
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max_column_name_length = 256
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time_grain_functions = {
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None: '{col}',
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'PT1S': "DATE_TRUNC('SECOND', {col})",
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'PT1M': "DATE_TRUNC('MINUTE', {col})",
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'PT5M': "DATEADD(MINUTE, FLOOR(DATE_PART(MINUTE, {col}) / 5) * 5, \
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DATE_TRUNC('HOUR', {col}))",
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'PT10M': "DATEADD(MINUTE, FLOOR(DATE_PART(MINUTE, {col}) / 10) * 10, \
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DATE_TRUNC('HOUR', {col}))",
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'PT15M': "DATEADD(MINUTE, FLOOR(DATE_PART(MINUTE, {col}) / 15) * 15, \
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DATE_TRUNC('HOUR', {col}))",
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'PT0.5H': "DATEADD(MINUTE, FLOOR(DATE_PART(MINUTE, {col}) / 30) * 30, \
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DATE_TRUNC('HOUR', {col}))",
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'PT1H': "DATE_TRUNC('HOUR', {col})",
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'P1D': "DATE_TRUNC('DAY', {col})",
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'P1W': "DATE_TRUNC('WEEK', {col})",
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'P1M': "DATE_TRUNC('MONTH', {col})",
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'P0.25Y': "DATE_TRUNC('QUARTER', {col})",
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'P1Y': "DATE_TRUNC('YEAR', {col})",
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}
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@classmethod
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def adjust_database_uri(cls, uri, selected_schema=None):
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database = uri.database
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if '/' in uri.database:
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database = uri.database.split('/')[0]
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if selected_schema:
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selected_schema = parse.quote(selected_schema, safe='')
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uri.database = database + '/' + selected_schema
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return uri
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@classmethod
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def epoch_to_dttm(cls):
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return "DATEADD(S, {col}, '1970-01-01')"
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@classmethod
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def epoch_ms_to_dttm(cls):
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return "DATEADD(MS, {col}, '1970-01-01')"
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