Class

org.apache.spark.ml.odkl

TopKUDAF

Related Doc: package odkl

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class TopKUDAF[B] extends UserDefinedAggregateFunction with Logging

Created by eugeny.malyutin on 24.06.16.

UDAF designed to extract top-numRows rows by columnValue Used to replace Hive Window-functions which are to slow in case of all-df in one aggregation cell Result of aggFun is packed in a column "arrData" and need to be org.apache.spark.sql.functions.explode-d

B

- type of columnToSortBy with implicit ordering for type B

Linear Supertypes
Logging, UserDefinedAggregateFunction, Serializable, Serializable, AnyRef, Any
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Inherited
  1. TopKUDAF
  2. Logging
  3. UserDefinedAggregateFunction
  4. Serializable
  5. Serializable
  6. AnyRef
  7. Any
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Visibility
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Instance Constructors

  1. new TopKUDAF(numRows: Int = 20, dfSchema: StructType, columnToSortBy: String)(implicit cmp: Ordering[B])

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    numRows

    num rows per aggregation colemn

    dfSchema

    dataframe schema with all columns in one struct-column named "data"

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  4. def apply(exprs: Column*): Column

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    Definition Classes
    UserDefinedAggregateFunction
    Annotations
    @varargs()

  5. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  6. def bufferSchema: StructType

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  7. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  8. implicit val cmp: Ordering[B]

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  9. val columnToSortByIndex: Int

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  10. def dataType: DataType

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  11. def deterministic: Boolean

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  12. def distinct(exprs: Column*): Column

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    Definition Classes
    UserDefinedAggregateFunction
    Annotations
    @varargs()

  13. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  14. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  15. def evaluate(buffer: Row): Any

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  16. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  17. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  18. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  19. def initialize(buffer: MutableAggregationBuffer): Unit

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  20. def inputSchema: StructType

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  21. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  22. def isTraceEnabled(): Boolean

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    Attributes
    protected
    Definition Classes
    Logging

  23. def k: Int

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  24. def log: Logger

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    Attributes
    protected
    Definition Classes
    Logging

  25. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  26. def logDebug(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  27. def logError(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  28. def logError(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  29. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  30. def logInfo(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  31. def logName: String

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    Attributes
    protected
    Definition Classes
    Logging

  32. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  33. def logTrace(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  34. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  35. def logWarning(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging

  36. def merge(buffer1: MutableAggregationBuffer, buffer2: Row): Unit

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  37. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  38. final def notify(): Unit

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    Definition Classes
    AnyRef

  39. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  40. val numRows: Int

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    num rows per aggregation colemn

  41. lazy val rowComparator: Comparator[AnyRef]

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  42. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  43. def toString(): String

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    Definition Classes
    AnyRef → Any

  44. def update(buffer: MutableAggregationBuffer, input: Row): Unit

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    Definition Classes
    TopKUDAF → UserDefinedAggregateFunction

  45. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  46. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  47. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Logging

Inherited from UserDefinedAggregateFunction

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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