| # 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, Optional |
| |
| from sqlalchemy import types |
| from sqlalchemy.dialects.mssql.base import SMALLDATETIME |
| |
| from superset.constants import TimeGrain |
| from superset.db_engine_specs.base import BaseEngineSpec, LimitMethod |
| from superset.db_engine_specs.exceptions import ( |
| SupersetDBAPIDatabaseError, |
| SupersetDBAPIOperationalError, |
| SupersetDBAPIProgrammingError, |
| ) |
| from superset.sql_parse import ParsedQuery |
| from superset.utils.core import GenericDataType |
| |
| |
| class KustoSqlEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method |
| limit_method = LimitMethod.WRAP_SQL |
| engine = "kustosql" |
| engine_name = "KustoSQL" |
| time_groupby_inline = True |
| time_secondary_columns = True |
| allows_joins = True |
| allows_subqueries = True |
| allows_sql_comments = False |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| TimeGrain.SECOND: "DATEADD(second, \ |
| 'DATEDIFF(second, 2000-01-01', {col}), '2000-01-01')", |
| TimeGrain.MINUTE: "DATEADD(minute, DATEDIFF(minute, 0, {col}), 0)", |
| TimeGrain.FIVE_MINUTES: "DATEADD(minute, DATEDIFF(minute, 0, {col}) / 5 * 5, 0)", |
| TimeGrain.TEN_MINUTES: "DATEADD(minute, \ |
| DATEDIFF(minute, 0, {col}) / 10 * 10, 0)", |
| TimeGrain.FIFTEEN_MINUTES: "DATEADD(minute, \ |
| DATEDIFF(minute, 0, {col}) / 15 * 15, 0)", |
| TimeGrain.HALF_HOUR: "DATEADD(minute, DATEDIFF(minute, 0, {col}) / 30 * 30, 0)", |
| TimeGrain.HOUR: "DATEADD(hour, DATEDIFF(hour, 0, {col}), 0)", |
| TimeGrain.DAY: "DATEADD(day, DATEDIFF(day, 0, {col}), 0)", |
| TimeGrain.WEEK: "DATEADD(day, -1, DATEADD(week, DATEDIFF(week, 0, {col}), 0))", |
| TimeGrain.MONTH: "DATEADD(month, DATEDIFF(month, 0, {col}), 0)", |
| TimeGrain.QUARTER: "DATEADD(quarter, DATEDIFF(quarter, 0, {col}), 0)", |
| TimeGrain.YEAR: "DATEADD(year, DATEDIFF(year, 0, {col}), 0)", |
| TimeGrain.WEEK_STARTING_SUNDAY: "DATEADD(day, -1," |
| " DATEADD(week, DATEDIFF(week, 0, {col}), 0))", |
| TimeGrain.WEEK_STARTING_MONDAY: "DATEADD(week," |
| " DATEDIFF(week, 0, DATEADD(day, -1, {col})), 0)", |
| } |
| |
| type_code_map: dict[int, str] = {} # loaded from get_datatype only if needed |
| |
| column_type_mappings = ( |
| ( |
| re.compile(r"^smalldatetime.*", re.IGNORECASE), |
| SMALLDATETIME(), |
| GenericDataType.TEMPORAL, |
| ), |
| ) |
| |
| @classmethod |
| def get_dbapi_exception_mapping(cls) -> dict[type[Exception], type[Exception]]: |
| # pylint: disable=import-outside-toplevel,import-error |
| import sqlalchemy_kusto.errors as kusto_exceptions |
| |
| return { |
| kusto_exceptions.DatabaseError: SupersetDBAPIDatabaseError, |
| kusto_exceptions.OperationalError: SupersetDBAPIOperationalError, |
| kusto_exceptions.ProgrammingError: SupersetDBAPIProgrammingError, |
| } |
| |
| @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.Date): |
| return f"CONVERT(DATE, '{dttm.date().isoformat()}', 23)" |
| if isinstance(sqla_type, types.TIMESTAMP): |
| datetime_formatted = dttm.isoformat(sep=" ", timespec="seconds") |
| return f"""CONVERT(TIMESTAMP, '{datetime_formatted}', 20)""" |
| if isinstance(sqla_type, SMALLDATETIME): |
| datetime_formatted = dttm.isoformat(sep=" ", timespec="seconds") |
| return f"""CONVERT(SMALLDATETIME, '{datetime_formatted}', 20)""" |
| if isinstance(sqla_type, types.DateTime): |
| datetime_formatted = dttm.isoformat(timespec="milliseconds") |
| return f"""CONVERT(DATETIME, '{datetime_formatted}', 126)""" |
| return None |
| |
| @classmethod |
| def is_readonly_query(cls, parsed_query: ParsedQuery) -> bool: |
| """Pessimistic readonly, 100% sure statement won't mutate anything""" |
| return parsed_query.sql.lower().startswith("select") |
| |
| |
| class KustoKqlEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method |
| limit_method = LimitMethod.WRAP_SQL |
| engine = "kustokql" |
| engine_name = "KustoKQL" |
| time_groupby_inline = True |
| time_secondary_columns = True |
| allows_joins = True |
| allows_subqueries = True |
| allows_sql_comments = False |
| run_multiple_statements_as_one = True |
| |
| _time_grain_expressions = { |
| None: "{col}", |
| TimeGrain.SECOND: "{col}/ time(1s)", |
| TimeGrain.MINUTE: "{col}/ time(1min)", |
| TimeGrain.HOUR: "{col}/ time(1h)", |
| TimeGrain.DAY: "{col}/ time(1d)", |
| TimeGrain.MONTH: "datetime_diff('month', CreateDate, \ |
| datetime(0001-01-01 00:00:00))+1", |
| TimeGrain.YEAR: "datetime_diff('year', CreateDate, \ |
| datetime(0001-01-01 00:00:00))+1", |
| } |
| |
| type_code_map: dict[int, str] = {} # loaded from get_datatype only if needed |
| |
| @classmethod |
| def get_dbapi_exception_mapping(cls) -> dict[type[Exception], type[Exception]]: |
| # pylint: disable=import-outside-toplevel,import-error |
| import sqlalchemy_kusto.errors as kusto_exceptions |
| |
| return { |
| kusto_exceptions.DatabaseError: SupersetDBAPIDatabaseError, |
| kusto_exceptions.OperationalError: SupersetDBAPIOperationalError, |
| kusto_exceptions.ProgrammingError: SupersetDBAPIProgrammingError, |
| } |
| |
| @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.Date): |
| return f"""datetime({dttm.date().isoformat()})""" |
| if isinstance(sqla_type, types.DateTime): |
| return f"""datetime({dttm.isoformat(timespec="microseconds")})""" |
| |
| return None |
| |
| @classmethod |
| def is_readonly_query(cls, parsed_query: ParsedQuery) -> bool: |
| """ |
| Pessimistic readonly, 100% sure statement won't mutate anything. |
| """ |
| return KustoKqlEngineSpec.is_select_query( |
| parsed_query |
| ) or parsed_query.sql.startswith(".show") |
| |
| @classmethod |
| def is_select_query(cls, parsed_query: ParsedQuery) -> bool: |
| return not parsed_query.sql.startswith(".") |
| |
| @classmethod |
| def parse_sql(cls, sql: str) -> list[str]: |
| """ |
| Kusto supports a single query statement, but it could include sub queries |
| and variables declared via let keyword. |
| """ |
| return [sql] |