spark distributions 源码
spark distributions 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/connector/distributions/distributions.scala
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.sql.connector.distributions
import org.apache.spark.sql.connector.expressions.{Expression, SortOrder}
private[sql] object LogicalDistributions {
def unspecified(): UnspecifiedDistribution = {
UnspecifiedDistributionImpl
}
def clustered(clustering: Array[Expression]): ClusteredDistribution = {
ClusteredDistributionImpl(clustering)
}
def ordered(ordering: Array[SortOrder]): OrderedDistribution = {
OrderedDistributionImpl(ordering)
}
}
private[sql] object UnspecifiedDistributionImpl extends UnspecifiedDistribution {
override def toString: String = "UnspecifiedDistribution"
}
private[sql] final case class ClusteredDistributionImpl(
clusteringExprs: Seq[Expression]) extends ClusteredDistribution {
override def clustering: Array[Expression] = clusteringExprs.toArray
override def toString: String = {
s"ClusteredDistribution(${clusteringExprs.map(_.describe).mkString(", ")})"
}
}
private[sql] final case class OrderedDistributionImpl(
orderingExprs: Seq[SortOrder]) extends OrderedDistribution {
override def ordering: Array[SortOrder] = orderingExprs.toArray
override def toString: String = {
s"OrderedDistribution(${orderingExprs.map(_.describe).mkString(", ")})"
}
}
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