Packages

sealed trait Distribution extends AnyRef

Specifies how tuples that share common expressions will be distributed when a query is executed in parallel on many machines.

Distribution here refers to inter-node partitioning of data. That is, it describes how tuples are partitioned across physical machines in a cluster. Knowing this property allows some operators (e.g., Aggregate) to perform partition local operations instead of global ones.

Linear Supertypes
AnyRef, Any
Known Subclasses
AllTuples, BroadcastDistribution, ClusteredDistribution, HashClusteredDistribution, OrderedDistribution, UnspecifiedDistribution
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Distribution
  2. AnyRef
  3. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def createPartitioning(numPartitions: Int): Partitioning

    Creates a default partitioning for this distribution, which can satisfy this distribution while matching the given number of partitions.

  2. abstract def requiredNumPartitions: Option[Int]

    The required number of partitions for this distribution.

    The required number of partitions for this distribution. If it's None, then any number of partitions is allowed for this distribution.

Concrete 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 clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  14. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  16. def toString(): String
    Definition Classes
    AnyRef → Any
  17. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  18. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  19. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from AnyRef

Inherited from Any

Ungrouped