2016-01-31 14:44:46 +00:00
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# mssql/zxjdbc.py
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2019-01-20 10:35:31 +00:00
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# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
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2016-01-31 14:44:46 +00:00
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# <see AUTHORS file>
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#
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# This module is part of SQLAlchemy and is released under
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# the MIT License: http://www.opensource.org/licenses/mit-license.php
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"""
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.. dialect:: mssql+zxjdbc
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:name: zxJDBC for Jython
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:dbapi: zxjdbc
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:connectstring: mssql+zxjdbc://user:pass@host:port/dbname\
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[?key=value&key=value...]
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:driverurl: http://jtds.sourceforge.net/
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.. note:: Jython is not supported by current versions of SQLAlchemy. The
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zxjdbc dialect should be considered as experimental.
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"""
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from ...connectors.zxJDBC import ZxJDBCConnector
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from .base import MSDialect, MSExecutionContext
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from ... import engine
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class MSExecutionContext_zxjdbc(MSExecutionContext):
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_embedded_scope_identity = False
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def pre_exec(self):
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super(MSExecutionContext_zxjdbc, self).pre_exec()
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# scope_identity after the fact returns null in jTDS so we must
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# embed it
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if self._select_lastrowid and self.dialect.use_scope_identity:
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self._embedded_scope_identity = True
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self.statement += "; SELECT scope_identity()"
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def post_exec(self):
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if self._embedded_scope_identity:
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while True:
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try:
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row = self.cursor.fetchall()[0]
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break
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except self.dialect.dbapi.Error:
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self.cursor.nextset()
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self._lastrowid = int(row[0])
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if (self.isinsert or self.isupdate or self.isdelete) and \
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self.compiled.returning:
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self._result_proxy = engine.FullyBufferedResultProxy(self)
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if self._enable_identity_insert:
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table = self.dialect.identifier_preparer.format_table(
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self.compiled.statement.table)
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self.cursor.execute("SET IDENTITY_INSERT %s OFF" % table)
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class MSDialect_zxjdbc(ZxJDBCConnector, MSDialect):
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jdbc_db_name = 'jtds:sqlserver'
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jdbc_driver_name = 'net.sourceforge.jtds.jdbc.Driver'
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execution_ctx_cls = MSExecutionContext_zxjdbc
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def _get_server_version_info(self, connection):
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return tuple(
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int(x)
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for x in connection.connection.dbversion.split('.')
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)
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dialect = MSDialect_zxjdbc
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