| # 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, LimitMethod |
| from superset.utils import core as utils |
| |
| |
| class FirebirdEngineSpec(BaseEngineSpec): |
| """Engine for Firebird""" |
| |
| engine = "firebird" |
| engine_name = "Firebird" |
| |
| # Firebird uses FIRST to limit: `SELECT FIRST 10 * FROM table` |
| limit_method = LimitMethod.FETCH_MANY |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| "PT1S": ( |
| "CAST(CAST({col} AS DATE) " |
| "|| ' ' " |
| "|| EXTRACT(HOUR FROM {col}) " |
| "|| ':' " |
| "|| EXTRACT(MINUTE FROM {col}) " |
| "|| ':' " |
| "|| FLOOR(EXTRACT(SECOND FROM {col})) AS TIMESTAMP)" |
| ), |
| "PT1M": ( |
| "CAST(CAST({col} AS DATE) " |
| "|| ' ' " |
| "|| EXTRACT(HOUR FROM {col}) " |
| "|| ':' " |
| "|| EXTRACT(MINUTE FROM {col}) " |
| "|| ':00' AS TIMESTAMP)" |
| ), |
| "PT1H": ( |
| "CAST(CAST({col} AS DATE) " |
| "|| ' ' " |
| "|| EXTRACT(HOUR FROM {col}) " |
| "|| ':00:00' AS TIMESTAMP)" |
| ), |
| "P1D": "CAST({col} AS DATE)", |
| "P1M": ( |
| "CAST(EXTRACT(YEAR FROM {col}) " |
| "|| '-' " |
| "|| EXTRACT(MONTH FROM {col}) " |
| "|| '-01' AS DATE)" |
| ), |
| "P1Y": "CAST(EXTRACT(YEAR FROM {col}) || '-01-01' AS DATE)", |
| } |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "DATEADD(second, {col}, CAST('00:00:00' AS TIMESTAMP))" |
| |
| @classmethod |
| def convert_dttm(cls, target_type: str, dttm: datetime) -> Optional[str]: |
| tt = target_type.upper() |
| if tt == utils.TemporalType.TIMESTAMP: |
| dttm_formatted = dttm.isoformat(sep=" ") |
| dttm_valid_precision = dttm_formatted[: len("YYYY-MM-DD HH:MM:SS.MMMM")] |
| return f"CAST('{dttm_valid_precision}' AS TIMESTAMP)" |
| if tt == utils.TemporalType.DATE: |
| return f"CAST('{dttm.date().isoformat()}' AS DATE)" |
| if tt == utils.TemporalType.TIME: |
| return f"CAST('{dttm.time().isoformat()}' AS TIME)" |
| return None |