Assigns the current value as milliseconds since 1970.
When used in a non-live query, the value of end is fixed to the end of the time interval when the query was issued. For live queries, the value of end is the live value of current end time, which can divert between Humio nodes.
curr the value of
curr := end()
use end() in an assignment
isOld := (end()-@timestamp) > 1000