case class BucketSpec(numBuckets: Int, bucketColumnNames: Seq[String], sortColumnNames: Seq[String]) extends SQLConfHelper with MetadataMapSupport with 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
- 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
- final def !=(arg0: Any): Boolean
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- final def ##: Int
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- final def asInstanceOf[T0]: T0
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- val bucketColumnNames: Seq[String]
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- protected[lang]
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- @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
- def conf: SQLConf
The active config object within the current scope.
The active config object within the current scope. See SQLConf.get for more information.
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- SQLConfHelper
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- def jsonToString(jsonMap: LinkedHashMap[String, JValue]): LinkedHashMap[String, String]
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- val numBuckets: Int
- def productElementNames: Iterator[String]
- Definition Classes
- Product
- val sortColumnNames: Seq[String]
- final def synchronized[T0](arg0: => T0): T0
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- def toJsonLinkedHashMap: LinkedHashMap[String, JValue]
- Definition Classes
- BucketSpec → MetadataMapSupport
- def toLinkedHashMap: LinkedHashMap[String, String]
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- MetadataMapSupport
- def toString(): String
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- BucketSpec → AnyRef → Any
- final def wait(arg0: Long, arg1: Int): Unit
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- def withSQLConf[T](pairs: (String, String)*)(f: => T): T
Sets all SQL configurations specified in
pairs, callsf, and then restores all SQL configurations.Sets all SQL configurations specified in
pairs, callsf, and then restores all SQL configurations.- Attributes
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- SQLConfHelper
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- Deprecated
(Since version 9)