| # 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, Optional |
| |
| from sqlalchemy import types |
| |
| from superset.constants import TimeGrain |
| from superset.db_engine_specs.base import BaseEngineSpec |
| |
| |
| class DynamoDBEngineSpec(BaseEngineSpec): |
| engine = "dynamodb" |
| engine_name = "Amazon DynamoDB" |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| TimeGrain.SECOND: "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:%S', {col}))", |
| TimeGrain.MINUTE: "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:00', {col}))", |
| TimeGrain.HOUR: "DATETIME(STRFTIME('%Y-%m-%dT%H:00:00', {col}))", |
| TimeGrain.DAY: "DATETIME({col}, 'start of day')", |
| TimeGrain.WEEK: "DATETIME({col}, 'start of day', \ |
| -strftime('%w', {col}) || ' days')", |
| TimeGrain.MONTH: "DATETIME({col}, 'start of month')", |
| TimeGrain.QUARTER: ( |
| "DATETIME({col}, 'start of month', " |
| "printf('-%d month', (strftime('%m', {col}) - 1) % 3))" |
| ), |
| TimeGrain.YEAR: "DATETIME({col}, 'start of year')", |
| TimeGrain.WEEK_ENDING_SATURDAY: "DATETIME({col}, 'start of day', 'weekday 6')", |
| TimeGrain.WEEK_ENDING_SUNDAY: "DATETIME({col}, 'start of day', 'weekday 0')", |
| TimeGrain.WEEK_STARTING_SUNDAY: ( |
| "DATETIME({col}, 'start of day', 'weekday 0', '-7 days')" |
| ), |
| TimeGrain.WEEK_STARTING_MONDAY: ( |
| "DATETIME({col}, 'start of day', 'weekday 1', '-7 days')" |
| ), |
| } |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "datetime({col}, 'unixepoch')" |
| |
| @classmethod |
| def convert_dttm( |
| cls, target_type: str, dttm: datetime, db_extra: Optional[dict[str, Any]] = None |
| ) -> Optional[str]: |
| sqla_type = cls.get_sqla_column_type(target_type) |
| |
| if isinstance(sqla_type, (types.String, types.DateTime)): |
| return f"""'{dttm.isoformat(sep=" ", timespec="seconds")}'""" |
| |
| return None |