try {
			String expectedQuery = DataDelta.queryReplace(queryTemplate, expectedVariables, dsn.toLowerCase().startsWith("jdbc:vertica"));
			String testQuery = DataDelta.queryReplace(queryTemplate, testVariables, dsn.toLowerCase().startsWith("jdbc:vertica"));

			Class.forName("com.mysql.jdbc.Driver");
			Class.forName("com.vertica.Driver");

			Connection c1 = DriverManager.getConnection(dsn);
			Connection c2 = DriverManager.getConnection(dsn);

			Statement statement1 = c1.createStatement();
			Statement statement2 = c2.createStatement();

			DataDelta dd = new DataDelta();
			dd.computeDataDelta(statement1.executeQuery(expectedQuery),
					statement2.executeQuery(testQuery), keys,
					expectedVariables, testVariables);
			dd.setPrintStyle(DataDelta.PRINT_HTML);
			printPage(response, prop, null);
			response.getOutputStream().println("\n<b>Results</b><br><br>");
			dd.printResults(new PrintStream(response.getOutputStream()));
			printBottomPage(response);
			statement1.close();
			statement2.close();
			c1.close();
			c2.close();
		} catch (Exception e) {
			printPage(response, prop, null);
			response.getOutputStream().println("<b>Error!</b><br><blockquote><code>" + e.getMessage().toString() + "</code></blockquote>");
			printBottomPage(response);
			e.printStackTrace();
		}