Pipeline aggregations #

Aggregations over other aggregations’ output. Two shapes: sibling pipelines (declared next to a bucket aggregation, addressed by buckets_path like "per_day>revenue") compute a statistic across its buckets; parent pipelines (declared inside a bucket aggregation’s aggs) transform each bucket — running totals, derivatives, window statistics, per-bucket arithmetic.

Every pipeline takes buckets_path (the consumed metric path) and most accept gap_policy (skip default / insert_zeros) plus format.