Itagaki Takahiro <itagaki.takahiro@oss.ntt.co.jp> writes:
> BTW, why the function was named pg_stat_*user*_functions ?
> even though there are no 'all' and 'sys' versions.
Well, it ignores built-in functions. Naming the view that way seems
like good future-proofing to me --- maybe someday we'll think of a
sufficiently low-overhead way to offer stats for system functions too.
regards, tom lane