module.exports = Self => {
    Self.doRecalc = async function() {
        try {
            await Self.rawSql(`
                CREATE EVENT zoneClosure_doRecalc
                    ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 15 SECOND
                    DO CALL zoneClosure_recalc;
            `);
        } catch (err) {
            if (err.code != 'ER_EVENT_ALREADY_EXISTS') throw err;
        }
    };
};