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# |
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# This file is part of GNU Enterprise. |
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# |
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# GNU Enterprise is free software; you can redistribute it |
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# and/or modify it under the terms of the GNU General Public |
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# License as published by the Free Software Foundation; either |
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# version 2, or (at your option) any later version. |
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# |
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# GNU Enterprise is distributed in the hope that it will be |
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# useful, but WITHOUT ANY WARRANTY; without even the implied |
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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# PURPOSE. See the GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public |
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# License along with program; see the file COPYING. If not, |
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# write to the Free Software Foundation, Inc., 59 Temple Place |
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# - Suite 330, Boston, MA 02111-1307, USA. |
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# |
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# Copyright 2000-2003 Free Software Foundation |
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# |
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# FILE: |
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# interbase/DBdriver.py |
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# |
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# DESCRIPTION: |
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# Driver to provide access to data via the Kinterbasdb Interbase/Firebird Python Driver |
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# Requires Kinterbasdb > 3.0 (http://kinterbasdb.sourceforge.net/) |
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# |
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# NOTES: |
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# |
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# Supported attributes (via connections.conf or <database> tag) |
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# |
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# host= This is the Interbase host for your connection (required) |
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# dbame= This is the Interbase database to use (required) |
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# |
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__all__ = ['Connection'] |
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from string import upper, lower, rstrip |
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import sys |
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from gnue.common.datasources import GDataObjects, GConditions, GConnections |
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from gnue.common.apps import GDebug |
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from gnue.common.datasources.drivers import DBSIG2 |
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from DataObject import * |
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from gnue.common.datasources.drivers.interbase.Schema.Discovery.Introspection import Introspection |
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try: |
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import kinterbasdb as SIG2api |
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except ImportError, message: |
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tmsg = _("Driver not installed: Kinterbasdb for Interbase [%s]") % message |
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raise GConnections.AdapterNotInstalled, tmsg |
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###################################################################### |
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# |
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# GConnection object for Interbase drivers |
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# |
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class Connection(DBSIG2.Connection): |
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defaultBehavior = Introspection |
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_DatabaseError = SIG2api.DatabaseError |
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supportedDataObjects = { |
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'object': DataObject_Object, |
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'sql': DataObject_SQL |
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} |
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# The date/time format used in insert/select statements |
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# (based on format used for time.strftime()) |
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_dateTimeFormat = "cast('%Y-%m-%d %H:%M:%S' as timestamp)" |
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def connect(self, connectData={}): |
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GDebug.printMesg(1,"Interbase database driver initializing") |
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try: |
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charset = connectData['charset'] |
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except KeyError: |
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charset = "" |
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try: |
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self.native = SIG2api.connect( \ |
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user=str(connectData['_username']), \ |
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password=str(connectData['_password']), \ |
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charset=charset, \ |
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database=connectData['dbname'], \ |
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host=connectData['host']) |
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except self._DatabaseError, value: |
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raise GDataObjects.LoginError, value |
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self._postConnect() |
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# Return the current date, according to database |
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def getTimeStamp(self): |
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return self.__singleQuery("select cast('now' as date) from rdb$database") |
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# Return a sequence number from sequence 'name' |
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def getSequence(self, name): |
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return self.__singleQuery("select gen_id(%s,1) from rdb$database" % name) |
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# Run the SQL statement 'statement' |
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def sql(self, statement): |
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cursor = self.__connection.cursor() |
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try: |
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cursor.execute(statement) |
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cursor.close() |
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except: |
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cursor.close() |
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raise |
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# Used internally |
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def __singleQuery(self, statement): |
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cursor = self.__connection.cursor() |
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try: |
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cursor.execute(statement) |
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rv = cursor.fetchone() |
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cursor.close() |
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except mesg: |
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GDebug.printMesg(1,"**** Unable to execute extension query") |
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GDebug.printMesg(1,"**** %s" % mesg) |
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cursor.close() |
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return None |
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try: |
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return rv[0] |
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except: |
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return None |