max_val()

Get the maximum value from a tdigest

Since 1.0.0

Get the maximum value from a tdigest. This accessor allows you to calculate the maximum alongside percentiles, without needing to create two separate aggregates from the same raw data.

max_val(
  digest TDigest
) RETURNS DOUBLE PRECISION

Arguments

Name	Type	Default	Required	Description
digest	TDigest	-		The digest to extract the max value from

Returns

Column	Type	Description
max_val	DOUBLE PRECISION	The maximum value entered into the tdigest

Samples

Get the maximum of the integers from 1 to 100.

SELECT max_val(tdigest(100, data))
  FROM generate_series(1, 100) data;

max_val
---------
    100