Reduce

Performs a reduction over a dataset, with the dataset partitioned by the result of the bucket MapFuncCore. So, rather than many-to-one, this is many-to-fewer.

bucket partitions the values into buckets based on the result of the expression, reducers applies the provided reduction to each expression, and repair finally turns those reduced expressions into a final value.

ReduceIndex is guaranteed to be a valid index into reducers.

Linear Supertypes

QScriptCore[T, A], Serializable, Serializable, Product, Equals, AnyRef, Any

Instance Constructors

new Reduce(src: A, bucket: slamdata.Predef.List[FreeMap[T]], reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]], repair: FreeMapA[T, ReduceIndex])

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
val bucket: slamdata.Predef.List[FreeMap[T]]
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
val reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]]
val repair: FreeMapA[T, ReduceIndex]
val src: A
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Docs: object Reduce | package qscript

final case class Reduce[T[_[_]], A](src: A, bucket: slamdata.Predef.List[FreeMap[T]], reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]], repair: FreeMapA[T, ReduceIndex]) extends QScriptCore[T, A] with Product with Serializable

Instance Constructors

new Reduce(src: A, bucket: slamdata.Predef.List[FreeMap[T]], reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]], repair: FreeMapA[T, ReduceIndex])

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

val bucket: slamdata.Predef.List[FreeMap[T]]

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def finalize(): Unit

final def getClass(): Class[_]

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

val reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]]

val repair: FreeMapA[T, ReduceIndex]

val src: A

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

final def wait(): Unit

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

final def wait(arg0: Long): Unit

Inherited from QScriptCore[T, A]

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped