min_val()

Get the minimum value from a tdigest

Since 1.0.0

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

min_val(
  digest TDigest
) RETURNS DOUBLE PRECISION

Arguments

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

Returns

Column	Type	Description
min_val	DOUBLE PRECISION	The minimum value entered into the tdigest

Samples

Get the minimum of the integers from 1 to 100.

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

min_val
---------
      1