import java.sql.*;

public class FuncNPE {
	public static void main(String args[]) throws Exception {
		Class.forName("org.postgresql.Driver");

		Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:5820/jurka?loglevel=2&prepareThreshold=1","jurka","");

		Statement stmt = conn.createStatement();
		stmt.execute("CREATE OR REPLACE FUNCTION myfunc(in a float8, out b float8) AS 'BEGIN b := a; END;' LANGUAGE plpgsql");
		stmt.close();

		CallableStatement cs = conn.prepareCall("{call myfunc(?,?)}");
		for (int i=0; i<10; i++) {
			cs.registerOutParameter(2, Types.DOUBLE);
			cs.setObject(1, new Double(i));
			cs.execute();
			cs.clearParameters();
		}

		cs.close();
		conn.close();
	}
}