Filters dated rows to those occurring at-or-before the as-of cutoff. A null cutoff (i.e. Mode='none') is the identity filter — all rows survive.
null
Mode='none'
This is the leakage-prevention boundary: only rows passing this filter may feed any time-relative feature.
the candidate dated rows for one record
the resolved cutoff, or null for no filtering
the rows at-or-before the cutoff
Filters dated rows to those occurring at-or-before the as-of cutoff. A
nullcutoff (i.e.Mode='none') is the identity filter — all rows survive.This is the leakage-prevention boundary: only rows passing this filter may feed any time-relative feature.