case class ApproximateUniqueCounter[T](sampleSize: Int) extends ApproxDistinctCounter[T] with Product with Serializable
ApproxDistinctCounter impl for org.apache.beam.sdk.transforms.ApproximateUnique with sample size.
Count approximate number of distinct values for each key in the SCollection.
- sampleSize
the number of entries in the statistical sample; the higher this number, the more accurate the estimate will be; should be
>= 16.
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- 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
TReturn a SCollection with single (Long)value which is the estimated distinct count in the given SCollection with type
T- Definition Classes
- ApproximateUniqueCounter → ApproxDistinctCounter
- 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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