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# connectors/aioodbc.py
# Copyright (C) 2005-2024 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 __future__ import annotations
from typing import TYPE_CHECKING
from .asyncio import AsyncAdapt_dbapi_connection
from .asyncio import AsyncAdapt_dbapi_cursor
from .asyncio import AsyncAdapt_dbapi_ss_cursor
from .asyncio import AsyncAdaptFallback_dbapi_connection
from .pyodbc import PyODBCConnector
from .. import pool
from .. import util
from ..util.concurrency import await_fallback
from ..util.concurrency import await_only
if TYPE_CHECKING:
from ..engine.interfaces import ConnectArgsType
from ..engine.url import URL
class AsyncAdapt_aioodbc_cursor(AsyncAdapt_dbapi_cursor):
__slots__ = ()
def setinputsizes(self, *inputsizes):
# see https://github.com/aio-libs/aioodbc/issues/451
return self._cursor._impl.setinputsizes(*inputsizes)
# how it's supposed to work
# return self.await_(self._cursor.setinputsizes(*inputsizes))
class AsyncAdapt_aioodbc_ss_cursor(
AsyncAdapt_aioodbc_cursor, AsyncAdapt_dbapi_ss_cursor
):
__slots__ = ()
class AsyncAdapt_aioodbc_connection(AsyncAdapt_dbapi_connection):
_cursor_cls = AsyncAdapt_aioodbc_cursor
_ss_cursor_cls = AsyncAdapt_aioodbc_ss_cursor
__slots__ = ()
@property
def autocommit(self):
return self._connection.autocommit
@autocommit.setter
def autocommit(self, value):
# https://github.com/aio-libs/aioodbc/issues/448
# self._connection.autocommit = value
self._connection._conn.autocommit = value
def cursor(self, server_side=False):
# aioodbc sets connection=None when closed and just fails with
# AttributeError here. Here we use the same ProgrammingError +
# message that pyodbc uses, so it triggers is_disconnect() as well.
if self._connection.closed:
raise self.dbapi.ProgrammingError(
"Attempt to use a closed connection."
)
return super().cursor(server_side=server_side)
def rollback(self):
# aioodbc sets connection=None when closed and just fails with
# AttributeError here. should be a no-op
if not self._connection.closed:
super().rollback()
def commit(self):
# aioodbc sets connection=None when closed and just fails with
# AttributeError here. should be a no-op
if not self._connection.closed:
super().commit()
def close(self):
# aioodbc sets connection=None when closed and just fails with
# AttributeError here. should be a no-op
if not self._connection.closed:
super().close()
class AsyncAdaptFallback_aioodbc_connection(
AsyncAdaptFallback_dbapi_connection, AsyncAdapt_aioodbc_connection
):
__slots__ = ()
class AsyncAdapt_aioodbc_dbapi:
def __init__(self, aioodbc, pyodbc):
self.aioodbc = aioodbc
self.pyodbc = pyodbc
self.paramstyle = pyodbc.paramstyle
self._init_dbapi_attributes()
self.Cursor = AsyncAdapt_dbapi_cursor
self.version = pyodbc.version
def _init_dbapi_attributes(self):
for name in (
"Warning",
"Error",
"InterfaceError",
"DataError",
"DatabaseError",
"OperationalError",
"InterfaceError",
"IntegrityError",
"ProgrammingError",
"InternalError",
"NotSupportedError",
"NUMBER",
"STRING",
"DATETIME",
"BINARY",
"Binary",
"BinaryNull",
"SQL_VARCHAR",
"SQL_WVARCHAR",
):
setattr(self, name, getattr(self.pyodbc, name))
def connect(self, *arg, **kw):
async_fallback = kw.pop("async_fallback", False)
creator_fn = kw.pop("async_creator_fn", self.aioodbc.connect)
if util.asbool(async_fallback):
return AsyncAdaptFallback_aioodbc_connection(
self,
await_fallback(creator_fn(*arg, **kw)),
)
else:
return AsyncAdapt_aioodbc_connection(
self,
await_only(creator_fn(*arg, **kw)),
)
class aiodbcConnector(PyODBCConnector):
is_async = True
supports_statement_cache = True
supports_server_side_cursors = True
@classmethod
def import_dbapi(cls):
return AsyncAdapt_aioodbc_dbapi(
__import__("aioodbc"), __import__("pyodbc")
)
def create_connect_args(self, url: URL) -> ConnectArgsType:
arg, kw = super().create_connect_args(url)
if arg and arg[0]:
kw["dsn"] = arg[0]
return (), kw
@classmethod
def get_pool_class(cls, url):
async_fallback = url.query.get("async_fallback", False)
if util.asbool(async_fallback):
return pool.FallbackAsyncAdaptedQueuePool
else:
return pool.AsyncAdaptedQueuePool
def get_driver_connection(self, connection):
return connection._connection
|
