Hibernate Formula Annotation - Fungsi MySql:INTERVAL, DAY

Dialek MySQL mana yang Anda gunakan? Jika MySqlDialect atau MySql5Dialect Anda dapat menggunakan yang berikut:

SELECT count(history.city_id) FROM history where timediff(now(), history.ts) < '720' and history.city_id = id

Atau tentukan fungsi hibernasi baru

public class ExtendedMySQL5Dialect extends MySQL5Dialect 
{
        public ExtendedMySQL5Dialect() 
        {
           super();
           registerFunction( "date_sub_interval", new SQLFunctionTemplate( Hibernate.DATE, "date_sub(?1, INTERVAL ?2 ?3)" ) );
           registerFunction( "date_add_interval", new SQLFunctionTemplate( Hibernate.DATE, "date_add(?1, INTERVAL ?2 ?3)" ) );           
        }
}

Pertanyaan:

History.ts < date_sub_interval(now(), 30, DAY)