| # 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 List, Optional, TYPE_CHECKING |
| |
| from sqlalchemy.engine.reflection import Inspector |
| |
| from superset.db_engine_specs.base import BaseEngineSpec |
| from superset.utils import core as utils |
| |
| if TYPE_CHECKING: |
| # prevent circular imports |
| from superset.models.core import Database # pylint: disable=unused-import |
| |
| |
| class SqliteEngineSpec(BaseEngineSpec): |
| engine = "sqlite" |
| |
| _time_grain_functions = { |
| None: "{col}", |
| "PT1S": "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:%S', {col}))", |
| "PT1M": "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:00', {col}))", |
| "PT1H": "DATETIME(STRFTIME('%Y-%m-%dT%H:00:00', {col}))", |
| "P1D": "DATE({col})", |
| "P1W": "DATE({col}, -strftime('%W', {col}) || ' days')", |
| "P1M": "DATE({col}, -strftime('%d', {col}) || ' days', '+1 day')", |
| "P1Y": "DATETIME(STRFTIME('%Y-01-01T00:00:00', {col}))", |
| "P1W/1970-01-03T00:00:00Z": "DATE({col}, 'weekday 6')", |
| "1969-12-28T00:00:00Z/P1W": "DATE({col}, 'weekday 0', '-7 days')", |
| } |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "datetime({col}, 'unixepoch')" |
| |
| @classmethod |
| def get_all_datasource_names( |
| cls, database, datasource_type: str |
| ) -> List[utils.DatasourceName]: |
| schemas = database.get_all_schema_names( |
| cache=database.schema_cache_enabled, |
| cache_timeout=database.schema_cache_timeout, |
| force=True, |
| ) |
| schema = schemas[0] |
| if datasource_type == "table": |
| return database.get_all_table_names_in_schema( |
| schema=schema, |
| force=True, |
| cache=database.table_cache_enabled, |
| cache_timeout=database.table_cache_timeout, |
| ) |
| elif datasource_type == "view": |
| return database.get_all_view_names_in_schema( |
| schema=schema, |
| force=True, |
| cache=database.table_cache_enabled, |
| cache_timeout=database.table_cache_timeout, |
| ) |
| else: |
| raise Exception(f"Unsupported datasource_type: {datasource_type}") |
| |
| @classmethod |
| def convert_dttm(cls, target_type: str, dttm: datetime) -> str: |
| iso = dttm.isoformat().replace("T", " ") |
| if "." not in iso: |
| iso += ".000000" |
| return "'{}'".format(iso) |
| |
| @classmethod |
| def get_table_names( |
| cls, database: "Database", inspector: Inspector, schema: Optional[str] |
| ) -> List[str]: |
| """Need to disregard the schema for Sqlite""" |
| return sorted(inspector.get_table_names()) |