| # 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 Dict, Optional |
| |
| from superset.db_engine_specs.base import BaseEngineSpec |
| from superset.utils import core as utils |
| |
| |
| class ElasticSearchEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method |
| engine = "elasticsearch" |
| engine_name = "ElasticSearch" |
| time_groupby_inline = True |
| time_secondary_columns = True |
| allows_joins = False |
| allows_subqueries = True |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| "PT1S": "HISTOGRAM({col}, INTERVAL 1 SECOND)", |
| "PT1M": "HISTOGRAM({col}, INTERVAL 1 MINUTE)", |
| "PT1H": "HISTOGRAM({col}, INTERVAL 1 HOUR)", |
| "P1D": "HISTOGRAM({col}, INTERVAL 1 DAY)", |
| "P1M": "HISTOGRAM({col}, INTERVAL 1 MONTH)", |
| "P1Y": "HISTOGRAM({col}, INTERVAL 1 YEAR)", |
| } |
| |
| type_code_map: Dict[int, str] = {} # loaded from get_datatype only if needed |
| |
| @classmethod |
| def convert_dttm(cls, target_type: str, dttm: datetime) -> Optional[str]: |
| if target_type.upper() == utils.TemporalType.DATETIME: |
| return f"""CAST('{dttm.isoformat(timespec="seconds")}' AS DATETIME)""" |
| return None |