| # 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 superset.db_engine_specs.base import BaseEngineSpec |
| |
| |
| class DruidEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method |
| """Engine spec for Druid.io""" |
| |
| engine = "druid" |
| allows_joins = False |
| allows_subqueries = True |
| |
| _time_grain_functions = { |
| None: "{col}", |
| "PT1S": "FLOOR({col} TO SECOND)", |
| "PT1M": "FLOOR({col} TO MINUTE)", |
| "PT1H": "FLOOR({col} TO HOUR)", |
| "P1D": "FLOOR({col} TO DAY)", |
| "P1W": "FLOOR({col} TO WEEK)", |
| "P1M": "FLOOR({col} TO MONTH)", |
| "P0.25Y": "FLOOR({col} TO QUARTER)", |
| "P1Y": "FLOOR({col} TO YEAR)", |
| } |
| |
| @classmethod |
| def alter_new_orm_column(cls, orm_col): |
| if orm_col.column_name == "__time": |
| orm_col.is_dttm = True |