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t

com.spotify.scio.estimators

ApproxDistinctCounter

trait ApproxDistinctCounter[T] extends AnyRef

Approximate distinct element counter for type T, e.g. HyperLogLog or HyperLogLog++. This has two APIs one estimate total distinct count for a given SCollection and second one estimate distinct count per each key in a key-value SCollection.

Source
ApproxDistinctCounter.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
ApproximateUniqueCounter, ApproximateUniqueCounterByError, SketchHllPlusPlus, ZetaSketchHllPlusPlus
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Abstract Value Members

  1. abstract def estimateDistinctCount(in: SCollection[T]): SCollection[Long]

    Return a SCollection with single (Long)value which is the estimated distinct count in the given SCollection with type T

  2. abstract def estimateDistinctCountPerKey[K](in: SCollection[(K, T)]): SCollection[(K, Long)]

    Approximate distinct element per each key in the given key value SCollection.

    Approximate distinct element per each key in the given key value SCollection. This will output estimated distinct count per each unique key.

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  1. final def !=(arg0: Any): Boolean
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  19. final def wait(arg0: Long): Unit
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