# 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 contextlib import re from datetime import datetime from decimal import Decimal from re import Pattern from typing import Any, Callable, Optional from urllib import parse from flask_babel import gettext as __ from sqlalchemy import types from sqlalchemy.dialects.mysql import ( BIT, DECIMAL, DOUBLE, FLOAT, INTEGER, LONGTEXT, MEDIUMINT, MEDIUMTEXT, TINYINT, TINYTEXT, ) from sqlalchemy.engine.url import URL from superset.constants import TimeGrain from superset.db_engine_specs.base import BaseEngineSpec, BasicParametersMixin from superset.errors import SupersetErrorType from superset.models.sql_lab import Query from superset.utils.core import GenericDataType # Regular expressions to catch custom errors CONNECTION_ACCESS_DENIED_REGEX = re.compile( "Access denied for user '(?P.*?)'@'(?P.*?)'" ) CONNECTION_INVALID_HOSTNAME_REGEX = re.compile( "Unknown MySQL server host '(?P.*?)'" ) CONNECTION_HOST_DOWN_REGEX = re.compile( "Can't connect to MySQL server on '(?P.*?)'" ) CONNECTION_UNKNOWN_DATABASE_REGEX = re.compile("Unknown database '(?P.*?)'") SYNTAX_ERROR_REGEX = re.compile( "check the manual that corresponds to your MySQL server " "version for the right syntax to use near '(?P.*)" ) class MySQLEngineSpec(BasicParametersMixin, BaseEngineSpec): engine = "mysql" engine_name = "MySQL" max_column_name_length = 64 default_driver = "mysqldb" sqlalchemy_uri_placeholder = ( "mysql://user:password@host:port/dbname[?key=value&key=value...]" ) encryption_parameters = {"ssl": "1"} supports_dynamic_schema = True supports_multivalues_insert = True column_type_mappings = ( ( re.compile(r"^int.*", re.IGNORECASE), INTEGER(), GenericDataType.NUMERIC, ), ( re.compile(r"^tinyint", re.IGNORECASE), TINYINT(), GenericDataType.NUMERIC, ), ( re.compile(r"^mediumint", re.IGNORECASE), MEDIUMINT(), GenericDataType.NUMERIC, ), ( re.compile(r"^decimal", re.IGNORECASE), DECIMAL(), GenericDataType.NUMERIC, ), ( re.compile(r"^float", re.IGNORECASE), FLOAT(), GenericDataType.NUMERIC, ), ( re.compile(r"^double", re.IGNORECASE), DOUBLE(), GenericDataType.NUMERIC, ), ( re.compile(r"^bit", re.IGNORECASE), BIT(), GenericDataType.NUMERIC, ), ( re.compile(r"^tinytext", re.IGNORECASE), TINYTEXT(), GenericDataType.STRING, ), ( re.compile(r"^mediumtext", re.IGNORECASE), MEDIUMTEXT(), GenericDataType.STRING, ), ( re.compile(r"^longtext", re.IGNORECASE), LONGTEXT(), GenericDataType.STRING, ), ) column_type_mutators: dict[types.TypeEngine, Callable[[Any], Any]] = { DECIMAL: lambda val: Decimal(val) if isinstance(val, str) else val } _time_grain_expressions = { None: "{col}", TimeGrain.SECOND: "DATE_ADD(DATE({col}), " "INTERVAL (HOUR({col})*60*60 + MINUTE({col})*60" " + SECOND({col})) SECOND)", TimeGrain.MINUTE: "DATE_ADD(DATE({col}), " "INTERVAL (HOUR({col})*60 + MINUTE({col})) MINUTE)", TimeGrain.HOUR: "DATE_ADD(DATE({col}), INTERVAL HOUR({col}) HOUR)", TimeGrain.DAY: "DATE({col})", TimeGrain.WEEK: "DATE(DATE_SUB({col}, INTERVAL DAYOFWEEK({col}) - 1 DAY))", TimeGrain.MONTH: "DATE(DATE_SUB({col}, INTERVAL DAYOFMONTH({col}) - 1 DAY))", TimeGrain.QUARTER: "MAKEDATE(YEAR({col}), 1) " "+ INTERVAL QUARTER({col}) QUARTER - INTERVAL 1 QUARTER", TimeGrain.YEAR: "DATE(DATE_SUB({col}, INTERVAL DAYOFYEAR({col}) - 1 DAY))", TimeGrain.WEEK_STARTING_MONDAY: "DATE(DATE_SUB({col}, " "INTERVAL DAYOFWEEK(DATE_SUB({col}, " "INTERVAL 1 DAY)) - 1 DAY))", } type_code_map: dict[int, str] = {} # loaded from get_datatype only if needed custom_errors: dict[Pattern[str], tuple[str, SupersetErrorType, dict[str, Any]]] = { CONNECTION_ACCESS_DENIED_REGEX: ( __('Either the username "%(username)s" or the password is incorrect.'), SupersetErrorType.CONNECTION_ACCESS_DENIED_ERROR, {"invalid": ["username", "password"]}, ), CONNECTION_INVALID_HOSTNAME_REGEX: ( __('Unknown MySQL server host "%(hostname)s".'), SupersetErrorType.CONNECTION_INVALID_HOSTNAME_ERROR, {"invalid": ["host"]}, ), CONNECTION_HOST_DOWN_REGEX: ( __('The host "%(hostname)s" might be down and can\'t be reached.'), SupersetErrorType.CONNECTION_HOST_DOWN_ERROR, {"invalid": ["host", "port"]}, ), CONNECTION_UNKNOWN_DATABASE_REGEX: ( __('Unable to connect to database "%(database)s".'), SupersetErrorType.CONNECTION_UNKNOWN_DATABASE_ERROR, {"invalid": ["database"]}, ), SYNTAX_ERROR_REGEX: ( __( 'Please check your query for syntax errors near "%(server_error)s". ' "Then, try running your query again." ), SupersetErrorType.SYNTAX_ERROR, {}, ), } disallow_uri_query_params = { "mysqldb": {"local_infile"}, "mysqlconnector": {"allow_local_infile"}, } enforce_uri_query_params = { "mysqldb": {"local_infile": 0}, "mysqlconnector": {"allow_local_infile": 0}, } @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"STR_TO_DATE('{dttm.date().isoformat()}', '%Y-%m-%d')" if isinstance(sqla_type, types.DateTime): datetime_formatted = dttm.isoformat(sep=" ", timespec="microseconds") return f"""STR_TO_DATE('{datetime_formatted}', '%Y-%m-%d %H:%i:%s.%f')""" return None @classmethod def adjust_engine_params( cls, uri: URL, connect_args: dict[str, Any], catalog: Optional[str] = None, schema: Optional[str] = None, ) -> tuple[URL, dict[str, Any]]: uri, new_connect_args = super().adjust_engine_params( uri, connect_args, catalog, schema, ) if schema: uri = uri.set(database=parse.quote(schema, safe="")) return uri, new_connect_args @classmethod def get_schema_from_engine_params( cls, sqlalchemy_uri: URL, connect_args: dict[str, Any], ) -> Optional[str]: """ Return the configured schema. A MySQL database is a SQLAlchemy schema. """ return parse.unquote(sqlalchemy_uri.database) @classmethod def get_datatype(cls, type_code: Any) -> Optional[str]: if not cls.type_code_map: # only import and store if needed at least once # pylint: disable=import-outside-toplevel import MySQLdb ft = MySQLdb.constants.FIELD_TYPE cls.type_code_map = { getattr(ft, k): k for k in dir(ft) if not k.startswith("_") } datatype = type_code if isinstance(type_code, int): datatype = cls.type_code_map.get(type_code) if datatype and isinstance(datatype, str) and datatype: return datatype return None @classmethod def epoch_to_dttm(cls) -> str: return "from_unixtime({col})" @classmethod def _extract_error_message(cls, ex: Exception) -> str: """Extract error message for queries""" message = str(ex) with contextlib.suppress(AttributeError, KeyError): if isinstance(ex.args, tuple) and len(ex.args) > 1: message = ex.args[1] return message @classmethod def get_cancel_query_id(cls, cursor: Any, query: Query) -> Optional[str]: """ Get MySQL connection ID that will be used to cancel all other running queries in the same connection. :param cursor: Cursor instance in which the query will be executed :param query: Query instance :return: MySQL Connection ID """ cursor.execute("SELECT CONNECTION_ID()") row = cursor.fetchone() return row[0] @classmethod def cancel_query(cls, cursor: Any, query: Query, cancel_query_id: str) -> bool: """ Cancel query in the underlying database. :param cursor: New cursor instance to the db of the query :param query: Query instance :param cancel_query_id: MySQL Connection ID :return: True if query cancelled successfully, False otherwise """ try: cursor.execute(f"KILL CONNECTION {cancel_query_id}") except Exception: # pylint: disable=broad-except return False return True