create table t1 (a date);
insert t1 values ('2000-01-02'), ('2001-02-03'), ('2002-03-04');
set debug_dbug='d,str_to_datetime_warn';
select * from t1 where a > date_add('2000-01-01', interval 5 day);
a
2001-02-03
2002-03-04
Warnings:
Note	1003	2000-01-01
Note	1003	2000-01-06
drop table t1;