Hello all,   I wrote the simple C# sample below that uses OdbcCommand and OdbcParameter : - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   string connectionString = "DRIVER={Cloudera ODBC Driver for Apache Hive};HOST=myserver;PORT=10000;DB=default;UID=me;PWD=mypwd"; string queryString = "select * from my_table where foo=? AND bar=?";   using (OdbcConnection connection = new OdbcConnection(connectionString)) {   OdbcCommand command = new OdbcCommand(queryString, connection); // Open the connection and execute the select command. try {  connection.Open(); OdbcParameter param1 = new OdbcParameter("@p1", "hadoop"); OdbcParameter param2 = new OdbcParameter("@p2", DBNull.Value);  command.Parameters.Add(param1);  command.Parameters.Add(param2); OdbcDataReader reader = command.ExecuteReader(); if (reader.HasRows) { Console.WriteLine("Hurray"); } } catch (Exception ex) { Console.WriteLine(ex.Message); } // The connection is automatically closed when the // code exits the using block. }   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   Although I am expecting to find some results, the query does not return any rows. Obviously, if I change the bar=? parameter by "bar is null", I get the results that I am expecting.   It looks like using an OdbcParameter with a DBNull.Value value is not working with Cloudera ODBC...   ... View more