# mssql/zxjdbc.py
# Copyright (C) 2005-2021 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
"""
.. dialect:: mssql+zxjdbc
:name: zxJDBC for Jython
:dbapi: zxjdbc
:connectstring: mssql+zxjdbc://user:pass@host:port/dbname[?key=value&key=value...]
:driverurl: http://jtds.sourceforge.net/
.. note:: Jython is not supported by current versions of SQLAlchemy. The
zxjdbc dialect should be considered as experimental.
""" # noqa
from .base import MSDialect
from .base import MSExecutionContext
from ... import engine
from ...connectors.zxJDBC import ZxJDBCConnector
class MSExecutionContext_zxjdbc(MSExecutionContext):
_embedded_scope_identity = False
def pre_exec(self):
super(MSExecutionContext_zxjdbc, self).pre_exec()
# scope_identity after the fact returns null in jTDS so we must
# embed it
if self._select_lastrowid and self.dialect.use_scope_identity:
self._embedded_scope_identity = True
self.statement += "; SELECT scope_identity()"
def post_exec(self):
if self._embedded_scope_identity:
while True:
try:
row = self.cursor.fetchall()[0]
break
except self.dialect.dbapi.Error:
self.cursor.nextset()
self._lastrowid = int(row[0])
if (
self.isinsert or self.isupdate or self.isdelete
) and self.compiled.returning:
self._result_proxy = engine.FullyBufferedResultProxy(self)
if self._enable_identity_insert:
table = self.dialect.identifier_preparer.format_table(
self.compiled.statement.table
)
self.cursor.execute("SET IDENTITY_INSERT %s OFF" % table)
class MSDialect_zxjdbc(ZxJDBCConnector, MSDialect):
jdbc_db_name = "jtds:sqlserver"
jdbc_driver_name = "net.sourceforge.jtds.jdbc.Driver"
execution_ctx_cls = MSExecutionContext_zxjdbc
def _get_server_version_info(self, connection):
return tuple(
int(x) for x in connection.connection.dbversion.split(".")
)
dialect = MSDialect_zxjdbc
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