| # 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, LimitMethod |
| |
| |
| class Db2EngineSpec(BaseEngineSpec): |
| engine = "ibm_db_sa" |
| engine_name = "IBM Db2" |
| limit_method = LimitMethod.WRAP_SQL |
| force_column_alias_quotes = True |
| max_column_name_length = 30 |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| "PT1S": "CAST({col} as TIMESTAMP)" " - MICROSECOND({col}) MICROSECONDS", |
| "PT1M": "CAST({col} as TIMESTAMP)" |
| " - SECOND({col}) SECONDS" |
| " - MICROSECOND({col}) MICROSECONDS", |
| "PT1H": "CAST({col} as TIMESTAMP)" |
| " - MINUTE({col}) MINUTES" |
| " - SECOND({col}) SECONDS" |
| " - MICROSECOND({col}) MICROSECONDS ", |
| "P1D": "CAST({col} as TIMESTAMP)" |
| " - HOUR({col}) HOURS" |
| " - MINUTE({col}) MINUTES" |
| " - SECOND({col}) SECONDS" |
| " - MICROSECOND({col}) MICROSECONDS", |
| "P1W": "{col} - (DAYOFWEEK({col})) DAYS", |
| "P1M": "{col} - (DAY({col})-1) DAYS", |
| "P0.25Y": "{col} - (DAY({col})-1) DAYS" |
| " - (MONTH({col})-1) MONTHS" |
| " + ((QUARTER({col})-1) * 3) MONTHS", |
| "P1Y": "{col} - (DAY({col})-1) DAYS" " - (MONTH({col})-1) MONTHS", |
| } |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "(TIMESTAMP('1970-01-01', '00:00:00') + {col} SECONDS)" |