| # 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 Any, List, Optional, Tuple |
| |
| from superset.db_engine_specs.base import BaseEngineSpec, LimitMethod |
| from superset.utils import core as utils |
| |
| |
| class OracleEngineSpec(BaseEngineSpec): |
| engine = "oracle" |
| engine_name = "Oracle" |
| limit_method = LimitMethod.WRAP_SQL |
| force_column_alias_quotes = True |
| max_column_name_length = 30 |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| "PT1S": "CAST({col} as DATE)", |
| "PT1M": "TRUNC(CAST({col} as DATE), 'MI')", |
| "PT1H": "TRUNC(CAST({col} as DATE), 'HH')", |
| "P1D": "TRUNC(CAST({col} as DATE), 'DDD')", |
| "P1W": "TRUNC(CAST({col} as DATE), 'WW')", |
| "P1M": "TRUNC(CAST({col} as DATE), 'MONTH')", |
| "P0.25Y": "TRUNC(CAST({col} as DATE), 'Q')", |
| "P1Y": "TRUNC(CAST({col} as DATE), 'YEAR')", |
| } |
| |
| @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.DATETIME: |
| datetime_formatted = dttm.isoformat(timespec="seconds") |
| return f"""TO_DATE('{datetime_formatted}', 'YYYY-MM-DD"T"HH24:MI:SS')""" |
| if tt == utils.TemporalType.TIMESTAMP: |
| return f"""TO_TIMESTAMP('{dttm |
| .isoformat(timespec="microseconds")}', 'YYYY-MM-DD"T"HH24:MI:SS.ff6')""" |
| return None |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "TO_DATE('1970-01-01','YYYY-MM-DD')+(1/24/60/60)*{col}" |
| |
| @classmethod |
| def epoch_ms_to_dttm(cls) -> str: |
| return "TO_DATE('1970-01-01','YYYY-MM-DD')+(1/24/60/60/1000)*{col}" |
| |
| @classmethod |
| def fetch_data( |
| cls, cursor: Any, limit: Optional[int] = None |
| ) -> List[Tuple[Any, ...]]: |
| """ |
| :param cursor: Cursor instance |
| :param limit: Maximum number of rows to be returned by the cursor |
| :return: Result of query |
| """ |
| if not cursor.description: |
| return [] |
| return super().fetch_data(cursor, limit) |