Packages

class TDigestReduceAggregator extends Aggregator[TDigest, TDigest, TDigest]

A spark Aggregator for reducing a column of t-digests down to a single t-digest. Therefore, in this Aggregator, 'reduce' and 'merge' both perform a t-digest merge operation.

Linear Supertypes
Aggregator[TDigest, TDigest, TDigest], Serializable, Serializable, AnyRef, Any
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Inherited
  1. TDigestReduceAggregator
  2. Aggregator
  3. Serializable
  4. Serializable
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new TDigestReduceAggregator(compression: Double, maxDiscrete: Int)

    compression

    the t-digest compression parameter.

    maxDiscrete

    maximum number of discrete values to track in PMF mode.

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def bufferEncoder: Encoder[TDigest]
    Definition Classes
    TDigestReduceAggregator → Aggregator
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  7. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  8. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  9. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  10. def finish(td: TDigest): TDigest
    Definition Classes
    TDigestReduceAggregator → Aggregator
  11. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  14. def merge(td1: TDigest, td2: TDigest): TDigest
    Definition Classes
    TDigestReduceAggregator → Aggregator
  15. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. def outputEncoder: Encoder[TDigest]
    Definition Classes
    TDigestReduceAggregator → Aggregator
  19. def reduce(td: TDigest, tdi: TDigest): TDigest
    Definition Classes
    TDigestReduceAggregator → Aggregator
  20. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  21. def toColumn: TypedColumn[TDigest, TDigest]
    Definition Classes
    Aggregator
  22. def toString(): String
    Definition Classes
    AnyRef → Any
  23. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  24. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  25. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  26. def zero: TDigest
    Definition Classes
    TDigestReduceAggregator → Aggregator

Inherited from Aggregator[TDigest, TDigest, TDigest]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped