<?php
function pmpro_upgrade_1_6()
{
global $wpdb;
$wpdb->hide_errors();
$wpdb->pmpro_membership_orders = $wpdb->prefix . 'pmpro_membership_orders';
//add notes column to orders
$sqlQuery = "ALTER TABLE `" . $wpdb->pmpro_membership_orders . "` ADD `notes` TEXT NOT NULL";
$wpdb->query($sqlQuery);
update_option("pmpro_db_version", "1.6");
return 1.6;
}