Packages

c

org.apache.spark.sql.catalyst.plans.physical

HashClusteredDistribution

case class HashClusteredDistribution(expressions: Seq[Expression], requiredNumPartitions: Option[Int] = None) extends Distribution with Product with Serializable

Represents data where tuples have been clustered according to the hash of the given expressions. The hash function is defined as HashPartitioning.partitionIdExpression, so only HashPartitioning can satisfy this distribution.

This is a strictly stronger guarantee than ClusteredDistribution. Given a tuple and the number of partitions, this distribution strictly requires which partition the tuple should be in.

Linear Supertypes
Serializable, Product, Equals, Distribution, AnyRef, Any
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Inherited
  1. HashClusteredDistribution
  2. Serializable
  3. Product
  4. Equals
  5. Distribution
  6. AnyRef
  7. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new HashClusteredDistribution(expressions: Seq[Expression], requiredNumPartitions: Option[Int] = None)

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(classOf[java.lang.CloneNotSupportedException]) @native()
  6. def createPartitioning(numPartitions: Int): Partitioning

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

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

    Definition Classes
    HashClusteredDistribution → Distribution
  7. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  8. val expressions: Seq[Expression]
  9. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  10. final def getClass(): Class[_ <: AnyRef]
    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. def productElementNames: Iterator[String]
    Definition Classes
    Product
  16. val 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.

    Definition Classes
    HashClusteredDistribution → Distribution
  17. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  18. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  20. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from Distribution

Inherited from AnyRef

Inherited from Any

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