Загрузить файлы в «venv/Lib/site-packages/sqlalchemy/dialects/mysql»

venv/Lib/site-packages/sqlalchemy/dialects/mysql/__init__.py

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+# dialects/mysql/__init__.py
+# Copyright (C) 2005-2026 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+# mypy: ignore-errors
+
+
+from . import aiomysql  # noqa
+from . import asyncmy  # noqa
+from . import base  # noqa
+from . import cymysql  # noqa
+from . import mariadbconnector  # noqa
+from . import mysqlconnector  # noqa
+from . import mysqldb  # noqa
+from . import pymysql  # noqa
+from . import pyodbc  # noqa
+from .base import BIGINT
+from .base import BINARY
+from .base import BIT
+from .base import BLOB
+from .base import BOOLEAN
+from .base import CHAR
+from .base import DATE
+from .base import DATETIME
+from .base import DECIMAL
+from .base import DOUBLE
+from .base import ENUM
+from .base import FLOAT
+from .base import INTEGER
+from .base import JSON
+from .base import LONGBLOB
+from .base import LONGTEXT
+from .base import MEDIUMBLOB
+from .base import MEDIUMINT
+from .base import MEDIUMTEXT
+from .base import NCHAR
+from .base import NUMERIC
+from .base import NVARCHAR
+from .base import REAL
+from .base import SET
+from .base import SMALLINT
+from .base import TEXT
+from .base import TIME
+from .base import TIMESTAMP
+from .base import TINYBLOB
+from .base import TINYINT
+from .base import TINYTEXT
+from .base import VARBINARY
+from .base import VARCHAR
+from .base import YEAR
+from .dml import Insert
+from .dml import insert
+from .expression import match
+from .mariadb import INET4
+from .mariadb import INET6
+
+# default dialect
+base.dialect = dialect = mysqldb.dialect
+
+__all__ = (
+    "BIGINT",
+    "BINARY",
+    "BIT",
+    "BLOB",
+    "BOOLEAN",
+    "CHAR",
+    "DATE",
+    "DATETIME",
+    "DECIMAL",
+    "DOUBLE",
+    "ENUM",
+    "FLOAT",
+    "INET4",
+    "INET6",
+    "INTEGER",
+    "INTEGER",
+    "JSON",
+    "LONGBLOB",
+    "LONGTEXT",
+    "MEDIUMBLOB",
+    "MEDIUMINT",
+    "MEDIUMTEXT",
+    "NCHAR",
+    "NVARCHAR",
+    "NUMERIC",
+    "SET",
+    "SMALLINT",
+    "REAL",
+    "TEXT",
+    "TIME",
+    "TIMESTAMP",
+    "TINYBLOB",
+    "TINYINT",
+    "TINYTEXT",
+    "VARBINARY",
+    "VARCHAR",
+    "YEAR",
+    "dialect",
+    "insert",
+    "Insert",
+    "match",
+)

venv/Lib/site-packages/sqlalchemy/dialects/mysql/aiomysql.py

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+# dialects/mysql/aiomysql.py
+# Copyright (C) 2005-2026 the SQLAlchemy authors and contributors <see AUTHORS
+# file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+r"""
+.. dialect:: mysql+aiomysql
+    :name: aiomysql
+    :dbapi: aiomysql
+    :connectstring: mysql+aiomysql://user:password@host:port/dbname[?key=value&key=value...]
+    :url: https://github.com/aio-libs/aiomysql
+
+The aiomysql dialect is SQLAlchemy's second Python asyncio dialect.
+
+Using a special asyncio mediation layer, the aiomysql dialect is usable
+as the backend for the :ref:`SQLAlchemy asyncio <asyncio_toplevel>`
+extension package.
+
+This dialect should normally be used only with the
+:func:`_asyncio.create_async_engine` engine creation function::
+
+    from sqlalchemy.ext.asyncio import create_async_engine
+
+    engine = create_async_engine(
+        "mysql+aiomysql://user:pass@hostname/dbname?charset=utf8mb4"
+    )
+
+"""  # noqa
+
+from __future__ import annotations
+
+from types import ModuleType
+from typing import Any
+from typing import Dict
+from typing import Optional
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import Union
+
+from .pymysql import _connection_ping_reconnects_true
+from .pymysql import MySQLDialect_pymysql
+from ... import pool
+from ... import util
+from ...connectors.asyncio import AsyncAdapt_dbapi_connection
+from ...connectors.asyncio import AsyncAdapt_dbapi_cursor
+from ...connectors.asyncio import AsyncAdapt_dbapi_module
+from ...connectors.asyncio import AsyncAdapt_dbapi_ss_cursor
+from ...connectors.asyncio import AsyncAdapt_terminate
+from ...util import langhelpers
+from ...util.concurrency import await_fallback
+from ...util.concurrency import await_only
+
+if TYPE_CHECKING:
+
+    from ...connectors.asyncio import AsyncIODBAPIConnection
+    from ...connectors.asyncio import AsyncIODBAPICursor
+    from ...engine.interfaces import ConnectArgsType
+    from ...engine.interfaces import DBAPIConnection
+    from ...engine.interfaces import DBAPICursor
+    from ...engine.interfaces import DBAPIModule
+    from ...engine.interfaces import PoolProxiedConnection
+    from ...engine.url import URL
+
+
+class AsyncAdapt_aiomysql_cursor(AsyncAdapt_dbapi_cursor):
+    __slots__ = ()
+
+    def _make_new_cursor(
+        self, connection: AsyncIODBAPIConnection
+    ) -> AsyncIODBAPICursor:
+        return connection.cursor(self._adapt_connection.dbapi.Cursor)
+
+
+class AsyncAdapt_aiomysql_ss_cursor(
+    AsyncAdapt_dbapi_ss_cursor, AsyncAdapt_aiomysql_cursor
+):
+    __slots__ = ()
+
+    def _make_new_cursor(
+        self, connection: AsyncIODBAPIConnection
+    ) -> AsyncIODBAPICursor:
+        return connection.cursor(
+            self._adapt_connection.dbapi.aiomysql.cursors.SSCursor
+        )
+
+
+class AsyncAdapt_aiomysql_connection(
+    AsyncAdapt_terminate, AsyncAdapt_dbapi_connection
+):
+    __slots__ = ()
+
+    _cursor_cls = AsyncAdapt_aiomysql_cursor
+    _ss_cursor_cls = AsyncAdapt_aiomysql_ss_cursor
+
+    def ping(self, reconnect: bool = False) -> None:
+        assert not reconnect
+        if self.dbapi._send_false_to_ping:
+            self.await_(self._connection.ping(reconnect=False))
+        else:
+            self.await_(self._connection.ping())
+
+    def character_set_name(self) -> Optional[str]:
+        return self._connection.character_set_name()  # type: ignore[no-any-return]  # noqa: E501
+
+    def autocommit(self, value: Any) -> None:
+        self.await_(self._connection.autocommit(value))
+
+    def get_autocommit(self) -> bool:
+        return self._connection.get_autocommit()  # type: ignore
+
+    def close(self) -> None:
+        self.await_(self._connection.ensure_closed())
+
+    async def _terminate_graceful_close(self) -> None:
+        await self._connection.ensure_closed()
+
+    def _terminate_force_close(self) -> None:
+        # it's not awaitable.
+        self._connection.close()
+
+
+class AsyncAdaptFallback_aiomysql_connection(AsyncAdapt_aiomysql_connection):
+    __slots__ = ()
+
+    await_ = staticmethod(await_fallback)
+
+
+class AsyncAdapt_aiomysql_dbapi(AsyncAdapt_dbapi_module):
+    def __init__(self, aiomysql: ModuleType, pymysql: ModuleType):
+        self.aiomysql = aiomysql
+        self.pymysql = pymysql
+        self.paramstyle = "format"
+        self._init_dbapi_attributes()
+        self.Cursor, self.SSCursor = self._init_cursors_subclasses()
+
+    def _init_dbapi_attributes(self) -> None:
+        for name in (
+            "Warning",
+            "Error",
+            "InterfaceError",
+            "DataError",
+            "DatabaseError",
+            "OperationalError",
+            "InterfaceError",
+            "IntegrityError",
+            "ProgrammingError",
+            "InternalError",
+            "NotSupportedError",
+        ):
+            setattr(self, name, getattr(self.aiomysql, name))
+
+        for name in (
+            "NUMBER",
+            "STRING",
+            "DATETIME",
+            "BINARY",
+            "TIMESTAMP",
+            "Binary",
+        ):
+            setattr(self, name, getattr(self.pymysql, name))
+
+    def connect(self, *arg: Any, **kw: Any) -> AsyncAdapt_aiomysql_connection:
+        async_fallback = kw.pop("async_fallback", False)
+        creator_fn = kw.pop("async_creator_fn", self.aiomysql.connect)
+
+        if util.asbool(async_fallback):
+            return AsyncAdaptFallback_aiomysql_connection(
+                self,
+                await_fallback(creator_fn(*arg, **kw)),
+            )
+        else:
+            return AsyncAdapt_aiomysql_connection(
+                self,
+                await_only(creator_fn(*arg, **kw)),
+            )
+
+    @langhelpers.memoized_property
+    def _send_false_to_ping(self) -> bool:
+        """determine if aiomysql has deprecated, changed the default of,
+        or removed the 'reconnect' argument of connection.ping().
+
+        See #13306 and #10492
+
+        """  # noqa: E501
+
+        try:
+            Connection = __import__(
+                "aiomysql.connection"
+            ).connection.Connection
+        except (ImportError, AttributeError):
+            return True
+        else:
+            return _connection_ping_reconnects_true(Connection)
+
+    def _init_cursors_subclasses(
+        self,
+    ) -> Tuple[AsyncIODBAPICursor, AsyncIODBAPICursor]:
+        # suppress unconditional warning emitted by aiomysql
+        class Cursor(self.aiomysql.Cursor):  # type: ignore[misc, name-defined]
+            async def _show_warnings(
+                self, conn: AsyncIODBAPIConnection
+            ) -> None:
+                pass
+
+        class SSCursor(self.aiomysql.SSCursor):  # type: ignore[misc, name-defined]   # noqa: E501
+            async def _show_warnings(
+                self, conn: AsyncIODBAPIConnection
+            ) -> None:
+                pass
+
+        return Cursor, SSCursor  # type: ignore[return-value]
+
+
+class MySQLDialect_aiomysql(MySQLDialect_pymysql):
+    driver = "aiomysql"
+    supports_statement_cache = True
+
+    supports_server_side_cursors = True
+    _sscursor = AsyncAdapt_aiomysql_ss_cursor
+
+    is_async = True
+    has_terminate = True
+
+    @classmethod
+    def import_dbapi(cls) -> AsyncAdapt_aiomysql_dbapi:
+        return AsyncAdapt_aiomysql_dbapi(
+            __import__("aiomysql"), __import__("pymysql")
+        )
+
+    @classmethod
+    def get_pool_class(cls, url: URL) -> type:
+        async_fallback = url.query.get("async_fallback", False)
+
+        if util.asbool(async_fallback):
+            return pool.FallbackAsyncAdaptedQueuePool
+        else:
+            return pool.AsyncAdaptedQueuePool
+
+    def do_terminate(self, dbapi_connection: DBAPIConnection) -> None:
+        dbapi_connection.terminate()
+
+    def create_connect_args(
+        self, url: URL, _translate_args: Optional[Dict[str, Any]] = None
+    ) -> ConnectArgsType:
+        return super().create_connect_args(
+            url, _translate_args=dict(username="user", database="db")
+        )
+
+    def is_disconnect(
+        self,
+        e: DBAPIModule.Error,
+        connection: Optional[Union[PoolProxiedConnection, DBAPIConnection]],
+        cursor: Optional[DBAPICursor],
+    ) -> bool:
+        if super().is_disconnect(e, connection, cursor):
+            return True
+        else:
+            str_e = str(e).lower()
+            return "not connected" in str_e
+
+    def _found_rows_client_flag(self) -> int:
+        from pymysql.constants import CLIENT  # type: ignore
+
+        return CLIENT.FOUND_ROWS  # type: ignore[no-any-return]
+
+    def get_driver_connection(
+        self, connection: DBAPIConnection
+    ) -> AsyncIODBAPIConnection:
+        return connection._connection  # type: ignore[no-any-return]
+
+
+dialect = MySQLDialect_aiomysql

venv/Lib/site-packages/sqlalchemy/dialects/mysql/asyncmy.py

@@ -0,0 +1,253 @@
+# dialects/mysql/asyncmy.py
+# Copyright (C) 2005-2026 the SQLAlchemy authors and contributors <see AUTHORS
+# file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+r"""
+.. dialect:: mysql+asyncmy
+    :name: asyncmy
+    :dbapi: asyncmy
+    :connectstring: mysql+asyncmy://user:password@host:port/dbname[?key=value&key=value...]
+    :url: https://github.com/long2ice/asyncmy
+
+Using a special asyncio mediation layer, the asyncmy dialect is usable
+as the backend for the :ref:`SQLAlchemy asyncio <asyncio_toplevel>`
+extension package.
+
+This dialect should normally be used only with the
+:func:`_asyncio.create_async_engine` engine creation function::
+
+    from sqlalchemy.ext.asyncio import create_async_engine
+
+    engine = create_async_engine(
+        "mysql+asyncmy://user:pass@hostname/dbname?charset=utf8mb4"
+    )
+
+"""  # noqa
+
+from __future__ import annotations
+
+from types import ModuleType
+from typing import Any
+from typing import NoReturn
+from typing import Optional
+from typing import TYPE_CHECKING
+from typing import Union
+
+from .pymysql import _connection_ping_reconnects_true
+from .pymysql import MySQLDialect_pymysql
+from ... import pool
+from ... import util
+from ...connectors.asyncio import AsyncAdapt_dbapi_connection
+from ...connectors.asyncio import AsyncAdapt_dbapi_cursor
+from ...connectors.asyncio import AsyncAdapt_dbapi_module
+from ...connectors.asyncio import AsyncAdapt_dbapi_ss_cursor
+from ...connectors.asyncio import AsyncAdapt_terminate
+from ...util import langhelpers
+from ...util.concurrency import await_fallback
+from ...util.concurrency import await_only
+
+if TYPE_CHECKING:
+    from ...connectors.asyncio import AsyncIODBAPIConnection
+    from ...connectors.asyncio import AsyncIODBAPICursor
+    from ...engine.interfaces import ConnectArgsType
+    from ...engine.interfaces import DBAPIConnection
+    from ...engine.interfaces import DBAPICursor
+    from ...engine.interfaces import DBAPIModule
+    from ...engine.interfaces import PoolProxiedConnection
+    from ...engine.url import URL
+
+
+class AsyncAdapt_asyncmy_cursor(AsyncAdapt_dbapi_cursor):
+    __slots__ = ()
+
+
+class AsyncAdapt_asyncmy_ss_cursor(
+    AsyncAdapt_dbapi_ss_cursor, AsyncAdapt_asyncmy_cursor
+):
+    __slots__ = ()
+
+    def _make_new_cursor(
+        self, connection: AsyncIODBAPIConnection
+    ) -> AsyncIODBAPICursor:
+        return connection.cursor(
+            self._adapt_connection.dbapi.asyncmy.cursors.SSCursor
+        )
+
+
+class AsyncAdapt_asyncmy_connection(
+    AsyncAdapt_terminate, AsyncAdapt_dbapi_connection
+):
+    __slots__ = ()
+
+    _cursor_cls = AsyncAdapt_asyncmy_cursor
+    _ss_cursor_cls = AsyncAdapt_asyncmy_ss_cursor
+
+    def _handle_exception(self, error: Exception) -> NoReturn:
+        if isinstance(error, AttributeError):
+            raise self.dbapi.InternalError(
+                "network operation failed due to asyncmy attribute error"
+            ) from error
+
+        raise error
+
+    def ping(self, reconnect: bool = False) -> None:
+        assert not reconnect
+        return self.await_(self._do_ping())
+
+    async def _do_ping(self) -> None:
+        try:
+            async with self._execute_mutex:
+                if self.dbapi._send_false_to_ping:
+                    await self._connection.ping(reconnect=False)
+                else:
+                    await self._connection.ping()
+        except Exception as error:
+            self._handle_exception(error)
+
+    def character_set_name(self) -> Optional[str]:
+        return self._connection.character_set_name()  # type: ignore[no-any-return]  # noqa: E501
+
+    def autocommit(self, value: Any) -> None:
+        self.await_(self._connection.autocommit(value))
+
+    def get_autocommit(self) -> bool:
+        return self._connection.get_autocommit()  # type: ignore
+
+    def close(self) -> None:
+        self.await_(self._connection.ensure_closed())
+
+    async def _terminate_graceful_close(self) -> None:
+        await self._connection.ensure_closed()
+
+    def _terminate_force_close(self) -> None:
+        # it's not awaitable.
+        self._connection.close()
+
+
+class AsyncAdaptFallback_asyncmy_connection(AsyncAdapt_asyncmy_connection):
+    __slots__ = ()
+
+    await_ = staticmethod(await_fallback)
+
+
+class AsyncAdapt_asyncmy_dbapi(AsyncAdapt_dbapi_module):
+    def __init__(self, asyncmy: ModuleType):
+        self.asyncmy = asyncmy
+        self.paramstyle = "format"
+        self._init_dbapi_attributes()
+
+    def _init_dbapi_attributes(self) -> None:
+        for name in (
+            "Warning",
+            "Error",
+            "InterfaceError",
+            "DataError",
+            "DatabaseError",
+            "OperationalError",
+            "InterfaceError",
+            "IntegrityError",
+            "ProgrammingError",
+            "InternalError",
+            "NotSupportedError",
+        ):
+            setattr(self, name, getattr(self.asyncmy.errors, name))
+
+    STRING = util.symbol("STRING")
+    NUMBER = util.symbol("NUMBER")
+    BINARY = util.symbol("BINARY")
+    DATETIME = util.symbol("DATETIME")
+    TIMESTAMP = util.symbol("TIMESTAMP")
+    Binary = staticmethod(bytes)
+
+    def connect(self, *arg: Any, **kw: Any) -> AsyncAdapt_asyncmy_connection:
+        async_fallback = kw.pop("async_fallback", False)
+        creator_fn = kw.pop("async_creator_fn", self.asyncmy.connect)
+
+        if util.asbool(async_fallback):
+            return AsyncAdaptFallback_asyncmy_connection(
+                self,
+                await_fallback(creator_fn(*arg, **kw)),
+            )
+        else:
+            return AsyncAdapt_asyncmy_connection(
+                self,
+                await_only(creator_fn(*arg, **kw)),
+            )
+
+    @langhelpers.memoized_property
+    def _send_false_to_ping(self) -> bool:
+        """determine if asyncmy has deprecated, changed the default of,
+        or removed the 'reconnect' argument of connection.ping().
+
+        See #13306 and #10492
+
+        """  # noqa: E501
+
+        try:
+            Connection = __import__("asyncmy.connection").connection.Connection
+        except (ImportError, AttributeError):
+            return True
+        else:
+            return _connection_ping_reconnects_true(Connection)
+
+
+class MySQLDialect_asyncmy(MySQLDialect_pymysql):
+    driver = "asyncmy"
+    supports_statement_cache = True
+
+    supports_server_side_cursors = True
+    _sscursor = AsyncAdapt_asyncmy_ss_cursor
+
+    is_async = True
+    has_terminate = True
+
+    @classmethod
+    def import_dbapi(cls) -> DBAPIModule:
+        return AsyncAdapt_asyncmy_dbapi(__import__("asyncmy"))
+
+    @classmethod
+    def get_pool_class(cls, url: URL) -> type:
+        async_fallback = url.query.get("async_fallback", False)
+
+        if util.asbool(async_fallback):
+            return pool.FallbackAsyncAdaptedQueuePool
+        else:
+            return pool.AsyncAdaptedQueuePool
+
+    def do_terminate(self, dbapi_connection: DBAPIConnection) -> None:
+        dbapi_connection.terminate()
+
+    def create_connect_args(self, url: URL) -> ConnectArgsType:  # type: ignore[override]  # noqa: E501
+        return super().create_connect_args(
+            url, _translate_args=dict(username="user", database="db")
+        )
+
+    def is_disconnect(
+        self,
+        e: DBAPIModule.Error,
+        connection: Optional[Union[PoolProxiedConnection, DBAPIConnection]],
+        cursor: Optional[DBAPICursor],
+    ) -> bool:
+        if super().is_disconnect(e, connection, cursor):
+            return True
+        else:
+            str_e = str(e).lower()
+            return (
+                "not connected" in str_e or "network operation failed" in str_e
+            )
+
+    def _found_rows_client_flag(self) -> int:
+        from asyncmy.constants import CLIENT  # type: ignore
+
+        return CLIENT.FOUND_ROWS  # type: ignore[no-any-return]
+
+    def get_driver_connection(
+        self, connection: DBAPIConnection
+    ) -> AsyncIODBAPIConnection:
+        return connection._connection  # type: ignore[no-any-return]
+
+
+dialect = MySQLDialect_asyncmy

venv/Lib/site-packages/sqlalchemy/dialects/mysql/cymysql.py

@@ -0,0 +1,107 @@
+# dialects/mysql/cymysql.py
+# Copyright (C) 2005-2026 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+r"""
+
+.. dialect:: mysql+cymysql
+    :name: CyMySQL
+    :dbapi: cymysql
+    :connectstring: mysql+cymysql://<username>:<password>@<host>/<dbname>[?<options>]
+    :url: https://github.com/nakagami/CyMySQL
+
+.. note::
+
+    The CyMySQL dialect is **not tested as part of SQLAlchemy's continuous
+    integration** and may have unresolved issues.  The recommended MySQL
+    dialects are mysqlclient and PyMySQL.
+
+"""  # noqa
+
+from __future__ import annotations
+
+from typing import Any
+from typing import Iterable
+from typing import Optional
+from typing import TYPE_CHECKING
+from typing import Union
+
+from .base import MySQLDialect
+from .mysqldb import MySQLDialect_mysqldb
+from .types import BIT
+from ... import util
+
+if TYPE_CHECKING:
+    from ...engine.base import Connection
+    from ...engine.interfaces import DBAPIConnection
+    from ...engine.interfaces import DBAPICursor
+    from ...engine.interfaces import DBAPIModule
+    from ...engine.interfaces import Dialect
+    from ...engine.interfaces import PoolProxiedConnection
+    from ...sql.type_api import _ResultProcessorType
+
+
+class _cymysqlBIT(BIT):
+    def result_processor(
+        self, dialect: Dialect, coltype: object
+    ) -> Optional[_ResultProcessorType[Any]]:
+        """Convert MySQL's 64 bit, variable length binary string to a long."""
+
+        def process(value: Optional[Iterable[int]]) -> Optional[int]:
+            if value is not None:
+                v = 0
+                for i in iter(value):
+                    v = v << 8 | i
+                return v
+            return value
+
+        return process
+
+
+class MySQLDialect_cymysql(MySQLDialect_mysqldb):
+    driver = "cymysql"
+    supports_statement_cache = True
+
+    description_encoding = None
+    supports_sane_rowcount = True
+    supports_sane_multi_rowcount = False
+    supports_unicode_statements = True
+
+    colspecs = util.update_copy(MySQLDialect.colspecs, {BIT: _cymysqlBIT})
+
+    @classmethod
+    def import_dbapi(cls) -> DBAPIModule:
+        return __import__("cymysql")
+
+    def _detect_charset(self, connection: Connection) -> str:
+        return connection.connection.charset  # type: ignore[no-any-return]
+
+    def _extract_error_code(self, exception: DBAPIModule.Error) -> int:
+        return exception.errno  # type: ignore[no-any-return]
+
+    def is_disconnect(
+        self,
+        e: DBAPIModule.Error,
+        connection: Optional[Union[PoolProxiedConnection, DBAPIConnection]],
+        cursor: Optional[DBAPICursor],
+    ) -> bool:
+        if isinstance(e, self.loaded_dbapi.OperationalError):
+            return self._extract_error_code(e) in (
+                2006,
+                2013,
+                2014,
+                2045,
+                2055,
+            )
+        elif isinstance(e, self.loaded_dbapi.InterfaceError):
+            # if underlying connection is closed,
+            # this is the error you get
+            return True
+        else:
+            return False
+
+
+dialect = MySQLDialect_cymysql