create temporary table test (
    data int,
    default Nullable(DateTime) DEFAULT '1977-01-01 00:00:00'
) engine  = Memory();

insert into test (data) select 1;

select * from test;

drop temporary table test;

create temporary table test (
    data int,
    default DateTime DEFAULT '1977-01-01 00:00:00'
) engine  = Memory();
insert into test (data) select 1;

select * from test;