Assigns the current value as milliseconds since 1970.
When used in a non-live query, the value of now is fixed to when the query was issued. For live queries, the value of now depends on where in the query it is placed. If it is placed before the first aggregate function, it is only evaluated the first time the query sees the event. If it is placed after the first aggregate function, it is evaluated continuously, and gives the live value of the current system time, which can divert between Humio nodes.
|string||false||_now||Name of output field.|
curr the value of
curr := now()
Use now() in an assignment
isOld := (now()-@timestamp) > 1000