| # 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, TYPE_CHECKING |
| |
| from superset.db_engine_specs.base import BaseEngineSpec |
| from superset.utils import core as utils |
| |
| if TYPE_CHECKING: |
| from superset.connectors.sqla.models import TableColumn |
| |
| |
| class CrateEngineSpec(BaseEngineSpec): |
| |
| engine = "crate" |
| engine_name = "CrateDB" |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| "PT1S": "DATE_TRUNC('second', {col})", |
| "PT1M": "DATE_TRUNC('minute', {col})", |
| "PT1H": "DATE_TRUNC('hour', {col})", |
| "P1D": "DATE_TRUNC('day', {col})", |
| "P1W": "DATE_TRUNC('week', {col})", |
| "P1M": "DATE_TRUNC('month', {col})", |
| "P0.25Y": "DATE_TRUNC('quarter', {col})", |
| "P1Y": "DATE_TRUNC('year', {col})", |
| } |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "{col} * 1000" |
| |
| @classmethod |
| def epoch_ms_to_dttm(cls) -> str: |
| return "{col}" |
| |
| @classmethod |
| def convert_dttm(cls, target_type: str, dttm: datetime) -> Optional[str]: |
| tt = target_type.upper() |
| if tt == utils.TemporalType.TIMESTAMP: |
| return f"{dttm.timestamp() * 1000}" |
| return None |
| |
| @classmethod |
| def alter_new_orm_column(cls, orm_col: "TableColumn") -> None: |
| if orm_col.type == "TIMESTAMP": |
| orm_col.python_date_format = "epoch_ms" |