| # 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 urllib import parse |
| |
| from sqlalchemy.engine.url import URL |
| |
| from superset.db_engine_specs.base import BaseEngineSpec |
| from superset.utils import core as utils |
| |
| |
| class DrillEngineSpec(BaseEngineSpec): |
| """Engine spec for Apache Drill""" |
| |
| engine = "drill" |
| engine_name = "Apache Drill" |
| default_driver = "sadrill" |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| "PT1S": "NEARESTDATE({col}, 'SECOND')", |
| "PT1M": "NEARESTDATE({col}, 'MINUTE')", |
| "PT15M": "NEARESTDATE({col}, 'QUARTER_HOUR')", |
| "PT0.5H": "NEARESTDATE({col}, 'HALF_HOUR')", |
| "PT1H": "NEARESTDATE({col}, 'HOUR')", |
| "P1D": "NEARESTDATE({col}, 'DAY')", |
| "P1W": "NEARESTDATE({col}, 'WEEK_SUNDAY')", |
| "P1M": "NEARESTDATE({col}, 'MONTH')", |
| "P0.25Y": "NEARESTDATE({col}, 'QUARTER')", |
| "P1Y": "NEARESTDATE({col}, 'YEAR')", |
| } |
| |
| # Returns a function to convert a Unix timestamp in milliseconds to a date |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return cls.epoch_ms_to_dttm().replace("{col}", "({col}*1000)") |
| |
| @classmethod |
| def epoch_ms_to_dttm(cls) -> str: |
| return "TO_DATE({col})" |
| |
| @classmethod |
| def convert_dttm(cls, target_type: str, dttm: datetime) -> Optional[str]: |
| tt = target_type.upper() |
| if tt == utils.TemporalType.DATE: |
| return f"TO_DATE('{dttm.date().isoformat()}', 'yyyy-MM-dd')" |
| if tt == utils.TemporalType.TIMESTAMP: |
| datetime_formatted = dttm.isoformat(sep=" ", timespec="seconds") |
| return f"""TO_TIMESTAMP('{datetime_formatted}', 'yyyy-MM-dd HH:mm:ss')""" |
| return None |
| |
| @classmethod |
| def adjust_database_uri(cls, uri: URL, selected_schema: Optional[str]) -> None: |
| if selected_schema: |
| uri.database = parse.quote(selected_schema, safe="") |