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/*
* 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 main.scala
import scala.collection.mutable.{ListBuffer, Queue}
import org.apache.spark.SparkConf
import org.apache.spark.SparkContext
import org.apache.spark.rdd.RDD
import org.apache.spark.sql.SQLContext
case class Person(name: String, age: Int)
object SparkSqlExample {
def main(args: Array[String]) {
val conf = sys.env.get("SPARK_AUDIT_MASTER") match {
case Some(master) => new SparkConf().setAppName("Simple Sql App").setMaster(master)
case None => new SparkConf().setAppName("Simple Sql App")
}
val sc = new SparkContext(conf)
val sqlContext = new SQLContext(sc)
import sqlContext._
val people = sc.makeRDD(1 to 100, 10).map(x => Person(s"Name$x", x))
people.registerAsTable("people")
val teenagers = sql("SELECT name FROM people WHERE age >= 13 AND age <= 19")
val teenagerNames = teenagers.map(t => "Name: " + t(0)).collect()
teenagerNames.foreach(println)
def test(f: => Boolean, failureMsg: String) = {
if (!f) {
println(failureMsg)
System.exit(-1)
}
}
test(teenagerNames.size == 7, "Unexpected number of selected elements: " + teenagerNames)
println("Test succeeded")
sc.stop()
}
}
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