min_val(digest TDigest) RETURNS DOUBLE PRECISION
Get the minimum value from a
tdigest. This does not work with
uddsketch based estimators. This saves space when you require both a
minimum and a percentile estimate as part of a continuous aggregate. You can
compute a single percentile estimator and do not need to specify a separate
min aggregate, by extracting the
min_val from the percentile estimator.
|The digest to extract the min value from|
|The minimum value entered into the t-digest|
SELECT min_val(tdigest(100, data)) FROM generate_series(1, 100) data;
min_val ----------- 1
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