Finds the current date as it exists on the server, and returns a bigtime value representing the current time with microcecond precision. The accuracy of the current time portion is limited by the accuracy of the system clock.
current_bigtime()
select current_bigtime()) ------------------------------ 10:32:00.010101AM
select datepart(us, current_bigtime()) ------------------------------ 01010
See also select, where clause in Reference Manual: Commands.
ANSI SQL – Compliance level: Entry-level compliant.
Any user can execute current_date.