rollup()

Roll up multiple tdigests

Since 1.0.0

Combine multiple intermediate tdigest aggregates, produced by tdigest, into a single intermediate tdigest aggregate. For example, you can use rollup to combine tdigests from 15-minute buckets into daily buckets.

rollup(
  digest TDigest
) RETURNS TDigest

Arguments

Name	Type	Default	Required	Description
digest	TDigest	-		The tdigests to roll up

Returns

Column	Type	Description
rollup	TDigest	A new tdigest created by combining the input tdigests