The where node

Filter points and batches with a lambda expression, which returns a boolean value.

Data-items for which the lambda expression evaluates as false will be discarded.

Example

|where(lambda: hour("ts") < 18 AND hour("ts") > 8 )

Discards every point who's timestamp is not between 09:00 and 18:00 UTC.

Parameters

Parameter	Description	Default
[node] lambda( lambda )	The lambda filter expression