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8fc814fc62
* Enable running of tests in tests/db_engine_specs * Resolve application context errors * Refactor and add tests for pyodbc.Row conversion * Appease isort, regardless of isort:skip
46 lines
1.7 KiB
Python
46 lines
1.7 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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from typing import List, Tuple
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from superset.db_engine_specs.base import BaseEngineSpec
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class ExasolEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method
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"""Engine spec for Exasol"""
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engine = "exa"
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max_column_name_length = 128
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# Exasol's DATE_TRUNC function is PostgresSQL compatible
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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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"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 fetch_data(cls, cursor, limit: int) -> List[Tuple]:
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data = super().fetch_data(cursor, limit)
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# Lists of `pyodbc.Row` need to be unpacked further
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return cls.pyodbc_rows_to_tuples(data)
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