65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
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"""Support for the Microsoft SQL Server database via the zxjdbc JDBC
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connector.
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JDBC Driver
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-----------
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Requires the jTDS driver, available from: http://jtds.sourceforge.net/
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Connecting
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----------
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URLs are of the standard form of
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``mssql+zxjdbc://user:pass@host:port/dbname[?key=value&key=value...]``.
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Additional arguments which may be specified either as query string
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arguments on the URL, or as keyword arguments to
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:func:`~sqlalchemy.create_engine()` will be passed as Connection
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properties to the underlying JDBC driver.
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"""
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from sqlalchemy.connectors.zxJDBC import ZxJDBCConnector
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from sqlalchemy.dialects.mssql.base import MSDialect, MSExecutionContext
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from sqlalchemy.engine import base
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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, e:
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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 self.compiled.returning:
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self._result_proxy = base.FullyBufferedResultProxy(self)
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if self._enable_identity_insert:
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table = self.dialect.identifier_preparer.format_table(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(int(x) for x in connection.connection.dbversion.split('.'))
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dialect = MSDialect_zxjdbc
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