AST-based query fuzzer should randomly modify data types in CREATE TABLE queries, mostly by wrapping in Nullable, Array and LowCardinality.
{
            std::cout << "ClickHouse server version is older than ClickHouse client. "
                        << "It may indicate that the server is out of date and can be upgraded." << std::endl
                        << std::endl;
        }
    }
    if (!global_context->getSettingsRef().use_client_time_zone)
    {
        const auto & time_zone = connection->getServerTimezone(connection_parameters.timeouts);
        if (!time_zone.empty())
        {
            try
            {
                DateLUT::setDefaultTimezone(time_zone);
            }
            catch (...)
            {
                std::cerr << "Warning: could not switch to server time zone: " << time_zone
                            << ", reason: " << getCurrentExceptionMessage( false) << std::endl
                            << "Proceeding with local time zone." << std::endl
                            << std::endl;
            }
        }
        else
        {
            std::cerr << "Warning: could not determine server time zone. "
                        << "Proceeding with local time zone." << std::endl
                        << std::endl;
        }
    }