/**
 * Loads a table either from our cached list, or inserts it into
 * the database and adds it to our cached list
 * @param options   the table options
 * @param callback  callback(table or null)
 */
function loadTable(options, callback) {

    var key = options.key + "." + options.tablename;
    var priv = false;

    if(options.tableid) {
        key = options.key + "." + options.tableid;
        priv = true;
    }

    if(tablelist[key]) {
        callback(tablelist[key]);
        return;
    }

    // insert or get existing
    ...