| # 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.postgres import PostgresBaseEngineSpec |
| |
| |
| class RedshiftEngineSpec(PostgresBaseEngineSpec): |
| engine = "redshift" |
| engine_name = "Amazon Redshift" |
| max_column_name_length = 127 |
| |
| @staticmethod |
| def _mutate_label(label: str) -> str: |
| """ |
| Redshift only supports lowercase column names and aliases. |
| |
| :param label: Expected expression label |
| :return: Conditionally mutated label |
| """ |
| return label.lower() |