| # 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. |
| import re |
| from datetime import datetime |
| from typing import Any, Dict, List, Optional, Pattern, Tuple, TYPE_CHECKING |
| |
| from flask_babel import gettext as __ |
| from sqlalchemy.engine.reflection import Inspector |
| |
| from superset.db_engine_specs.base import BaseEngineSpec |
| from superset.errors import SupersetErrorType |
| from superset.utils import core as utils |
| |
| if TYPE_CHECKING: |
| # prevent circular imports |
| from superset.models.core import Database |
| |
| |
| COLUMN_DOES_NOT_EXIST_REGEX = re.compile("no such column: (?P<column_name>.+)") |
| |
| |
| class SqliteEngineSpec(BaseEngineSpec): |
| engine = "sqlite" |
| engine_name = "SQLite" |
| |
| _time_grain_expressions = { |
| 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')", |
| "P0.25Y": ( |
| "DATETIME(STRFTIME('%Y-', {col}) || " # year |
| "SUBSTR('00' || " # pad with zeros to 2 chars |
| "((CAST(STRFTIME('%m', {col}) AS INTEGER)) - " # month as integer |
| "(((CAST(STRFTIME('%m', {col}) AS INTEGER)) - 1) % 3)), " # month in quarter |
| "-2) || " # close pad |
| "'-01T00:00:00')" |
| ), |
| "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')", |
| } |
| |
| custom_errors: Dict[Pattern[str], Tuple[str, SupersetErrorType, Dict[str, Any]]] = { |
| COLUMN_DOES_NOT_EXIST_REGEX: ( |
| __('We can\'t seem to resolve the column "%(column_name)s"'), |
| SupersetErrorType.COLUMN_DOES_NOT_EXIST_ERROR, |
| {}, |
| ), |
| } |
| |
| @classmethod |
| def epoch_to_dttm(cls) -> str: |
| return "datetime({col}, 'unixepoch')" |
| |
| @classmethod |
| def get_all_datasource_names( |
| cls, database: "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, |
| ) |
| if 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, |
| ) |
| raise Exception(f"Unsupported datasource_type: {datasource_type}") |
| |
| @classmethod |
| def convert_dttm(cls, target_type: str, dttm: datetime) -> Optional[str]: |
| tt = target_type.upper() |
| if tt in (utils.TemporalType.TEXT, utils.TemporalType.DATETIME): |
| return f"""'{dttm.isoformat(sep=" ", timespec="microseconds")}'""" |
| return None |
| |
| @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()) |