| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| from datetime import datetime |
| from typing import Optional |
| |
| from superset.db_engine_specs.base import BaseEngineSpec |
| from superset.utils import core as utils |
| |
| |
| class AthenaEngineSpec(BaseEngineSpec): |
| engine = "awsathena" |
| engine_name = "Amazon Athena" |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| "PT1S": "date_trunc('second', CAST({col} AS TIMESTAMP))", |
| "PT1M": "date_trunc('minute', CAST({col} AS TIMESTAMP))", |
| "PT1H": "date_trunc('hour', CAST({col} AS TIMESTAMP))", |
| "P1D": "date_trunc('day', CAST({col} AS TIMESTAMP))", |
| "P1W": "date_trunc('week', CAST({col} AS TIMESTAMP))", |
| "P1M": "date_trunc('month', CAST({col} AS TIMESTAMP))", |
| "P0.25Y": "date_trunc('quarter', CAST({col} AS TIMESTAMP))", |
| "P1Y": "date_trunc('year', CAST({col} AS TIMESTAMP))", |
| "P1W/1970-01-03T00:00:00Z": "date_add('day', 5, date_trunc('week', \ |
| date_add('day', 1, CAST({col} AS TIMESTAMP))))", |
| "1969-12-28T00:00:00Z/P1W": "date_add('day', -1, date_trunc('week', \ |
| date_add('day', 1, CAST({col} AS TIMESTAMP))))", |
| } |
| |
| @classmethod |
| def convert_dttm(cls, target_type: str, dttm: datetime) -> Optional[str]: |
| tt = target_type.upper() |
| if tt == utils.TemporalType.DATE: |
| return f"from_iso8601_date('{dttm.date().isoformat()}')" |
| if tt == utils.TemporalType.TIMESTAMP: |
| datetime_formatted = dttm.isoformat(timespec="microseconds") |
| return f"""from_iso8601_timestamp('{datetime_formatted}')""" |
| return None |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "from_unixtime({col})" |
| |
| @staticmethod |
| def _mutate_label(label: str) -> str: |
| """ |
| Athena only supports lowercase column names and aliases. |
| |
| :param label: Expected expression label |
| :return: Conditionally mutated label |
| """ |
| return label.lower() |