/* * 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.execution import org.apache.spark.sql.Row import org.apache.spark.sql.catalyst.dsl.expressions._ import org.apache.spark.sql.test.SharedSQLContext class SortSuite extends SparkPlanTest with SharedSQLContext { // This test was originally added as an example of how to use [[SparkPlanTest]]; //这个测试最初是作为一个如何使用的一个例子添加的 // it's not designed to be a comprehensive test of ExternalSort. test("basic sorting using ExternalSort") {//使用外部排序的基本排序 val input = Seq( ("Hello", 4, 2.0), ("Hello", 1, 1.0), ("World", 8, 3.0) ) checkAnswer( input.toDF("a", "b", "c"), ExternalSort('a.asc :: 'b.asc :: Nil, global = true, _: SparkPlan), input.sortBy(t => (t._1, t._2)).map(Row.fromTuple), sortAnswers = false) checkAnswer( input.toDF("a", "b", "c"), ExternalSort('b.asc :: 'a.asc :: Nil, global = true, _: SparkPlan), input.sortBy(t => (t._2, t._1)).map(Row.fromTuple), sortAnswers = false) } }