The CURRENT_TIME function returns a TIME data type value
    containing hours, minutes, and seconds for time 'now'.

    You can specify a fractional precision between 0 and 2 for
    the seconds returned by CURRENT_TIME. The fractional-seconds
    precision is a number that designates the number of digits
    returned in the field. For example, a fractional precision of
    2 means that seconds are returned as hundredths of a second (2
    digits beyond the decimal point), while a fractional precision of
    1 means that only tenths of a second are returned (1 digit beyond
    the decimal point).

    You can specify a current default for a time or timestamp field
    with nondefault fractional-seconds precision.