HyperLogLog in Presto: Faster cardinality estimation - Facebook Engineering
HyperLogLog (HLL) in Presto, a distributed SQL query engine, provides an approximate count of distinct elements using a function called APPROX_DISTINCT.
13 Dec 2018 ... HyperLogLog (HLL) in Presto, a distributed SQL query engine, provides an approximate count of distinct elements using a function called ...