Hi, I have a stored procedure in db that takes a 'timestamp without time zone' as its parameter. The application uses c# and npgsql to access database. When I call the stored procedure from c#, I got an exception says that the stored procedure with 'timestamp with time zone' is unknown. It seems the driver somehow maps the datatime to 'timestamp with time zone' in this case. The code I used in c#; DbCommand command = conn.CreateCommand(); command.CommandText = "getInfo"; command.CommandType = CommandType.StoredProcedure; DbParameter param1 = command.CreateParameter(); param1.DbType = DbType.DateTime; param1.Value = mission.StartTime //datetime value retrieved from a database table 'timestamp without time zone' column command.Parameters.Add(param1); IDataReader dr = command.ExecuteReader(); Form npgsql user menu, both timestamp with/without time zone are mapped to DbType.DateTime. What is the issue here? Thanks /dan -- View this message in context: http://www.nabble.com/timestamp-without-time-zone-and-datetime-tp25910519p25910519.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general