{
    //rdbms:server type, postgresql,mysql or sqlite3
    "rdbms":"postgresql",
    //filename:sqlite3 db file name
    //"filename":"",
    //host:server address,localhost by default;
    "host":"127.0.0.1",
    //port:server port, 5432 by default;
    "port":5432,
    //dbname:Database name;
    "dbname":"",
    "user":"",
    "passwd":"",
    "tables":[]
}