Data type of a time WITHOUT time zone.
An instance consists of hour:minute:second[.fractional with up to nanosecond
precision and values ranging from
Compared to the SQL standard, leap seconds (23:59:60 and 23:59:61)
are not supported.
precision – int, the number of digits of fractional seconds. It must
have a value between 0 and 9 (both inclusive).
nullable – boolean, whether the type can be null (None) or not.
The precision must be 0 currently.