DateTimeColumn get createTime => dateTime().withDefault(currentDateAndTime)();

[temeipu-offical]

May I ask if the currentDateAndTime method does not support millisecond values? I have already set the option store_date_time_values_as_text: true, but it seems that the currentDateAndTime method does not support millisecond timestamps.

[simolus3]

but it seems that the currentDateAndTime method does not support millisecond timestamps

This is a good point. We use the CURRENT_TIMESTAMP literal which feels like the right / expected default, but that also doesn't provide subseconds.

It looks like using datetime('now' , ' subseq') should work:

const nowWithSubsecond = FunctionCallExpression<DateTime>(
    'datetime', [Constant('now'), Constant('subsec')]);

Using that expression as a default clause should give you access to subsecond accuracy.