Derivative aggregation #

A parent pipeline aggregation computing the difference between each bucket’s metric and the previous bucket’s — “how much did it change”. The first bucket has no predecessor and answers null.

Parameters for derivative #

• buckets_path
  (Required, string) Path to the consumed metric in the SAME bucket ("revenue").
• gap_policy
  (Optional, string) skip (default) or insert_zeros.
• format
  (Optional, string) Output number format.
• unit
  (Optional, string) For date_histogram parents: report the derivative per time unit (e.g. "day").