org.apache.spark.sql.catalyst.catalog

BucketSpec

case class BucketSpec(numBuckets: Int, bucketColumnNames: Seq[String], sortColumnNames: Seq[String]) extends Product with Serializable

A container for bucketing information. Bucketing is a technology for decomposing data sets into more manageable parts, and the number of buckets is fixed so it does not fluctuate with data.

numBuckets

number of buckets.

bucketColumnNames

the names of the columns that used to generate the bucket id.

sortColumnNames

the names of the columns that used to sort data in each bucket.

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Instance Constructors

  1. new BucketSpec(numBuckets: Int, bucketColumnNames: Seq[String], sortColumnNames: Seq[String])

    numBuckets

    number of buckets.

    bucketColumnNames

    the names of the columns that used to generate the bucket id.

    sortColumnNames

    the names of the columns that used to sort data in each bucket.

Value Members

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

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

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  3. final def ##(): Int

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  4. final def ==(arg0: AnyRef): Boolean

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

    Definition Classes
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  6. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  7. val bucketColumnNames: Seq[String]

    the names of the columns that used to generate the bucket id.

  8. def clone(): AnyRef

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    protected[java.lang]
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    @throws( ... )
  9. final def eq(arg0: AnyRef): Boolean

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  10. def finalize(): Unit

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    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]

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  12. final def isInstanceOf[T0]: Boolean

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

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  14. final def notify(): Unit

    Definition Classes
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  15. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  16. val numBuckets: Int

    number of buckets.

  17. val sortColumnNames: Seq[String]

    the names of the columns that used to sort data in each bucket.

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

    Definition Classes
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  19. def toLinkedHashMap: LinkedHashMap[String, String]

  20. def toString(): String

    Definition Classes
    BucketSpec → AnyRef → Any
  21. final def wait(): Unit

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    @throws( ... )
  22. final def wait(arg0: Long, arg1: Int): Unit

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    @throws( ... )
  23. final def wait(arg0: Long): Unit

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