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drop table if exists t1;
create table t1 (id int auto_increment primary key not null, mydate date not null);
insert into t1 values (NULL,"2002-05-01"),(NULL,"2002-05-01"),(NULL,"2002-05-01");
flush tables;
select * from t1 where isnull(to_days(mydate));
id mydate
drop table t1;
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