stateDuration() returns the cumulative duration of a given state.
The state is defined by the
fn predicate function. For each consecutive
record that evaluates to
true, the state duration is incremented by the
duration of time between records using the specified
unit. When a record
false, the value is set to
-1 and the state duration is reset.
If the record generates an error during evaluation, the point is discarded,
and does not affect the state duration.
The state duration is added as an additional column to each record. The duration is represented as an integer in the units specified.
Note: As the first point in the given state has no previous point, its state duration will be 0.
Function type signature
( <-tables: stream[A], fn: (r: A) => bool, ?column: string, ?timeColumn: string, ?unit: duration, ) => stream[B] where A: Record, B: Record
(Required) Predicate function that identifies the state of a record.
Column to store the state duration in. Default is
Time column to use to calculate elapsed time between rows.
Unit of time to use to increment state duration. Default is
- 1ns (nanoseconds)
- 1us (microseconds)
- 1ms (milliseconds)
- 1s (seconds)
- 1m (minutes)
- 1h (hours)
- 1d (days)
Input data. Default is piped-forward data (
Return the time spent in a specified state
import "sampledata" sampledata.int() |> stateDuration(fn: (r) => r._value < 15)
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