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hyperloglog(x, [b]) – Constructs a HyperLogLog++ estimator to estimate reach for large values, with optional bit parameter for specifying precision (b must be in [4,16]). Default is b = 6. Returns a binary value that represents the HyperLogLog++ data structure.

Platforms: WhereOS, Spark, Hive
Class: brickhouse.udf.hll.HyperLogLogUDAF

More functions can be added to WhereOS via Python or R bindings or as Java & Scala UDF (user-defined function), UDAF (user-defined aggregation function) and UDTF (user-defined table generating function) extensions. Custom libraries can be added on via Settings-page or installed from WhereOS Store.

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