case class BucketSpec(numBuckets: Int, bucketColumnNames: Seq[String], sortColumnNames: Seq[String]) extends SQLConfHelper 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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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.
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- val bucketColumnNames: Seq[String]
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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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- val numBuckets: Int
- val sortColumnNames: Seq[String]
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