[Dovecot] postfix mysql quota map to dovecot dict in mysql

currently dovecot dict is

CREATE TABLE IF NOT EXISTS quota ( username varchar(100) COLLATE latin1_general_ci NOT NULL, bytes bigint(20) NOT NULL DEFAULT '0', messages int(11) NOT NULL DEFAULT '0', PRIMARY KEY (username) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

there is not field that says how much quota each user have, so one cant make a query on how much its left pr user

how can i resolve this in dovecot dict ?

i like to do an postfix mysql map to temp reject if quota is out of limit

-- Benny Pedersen