Spark SQL入门示例

一时失言乱红尘 2023-10-03 13:18 38阅读 0赞

## pom ##

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>org.zxl</groupId>
        <artifactId>SparkDemo1</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        <properties>
            <maven.compiler.source>8</maven.compiler.source>
            <maven.compiler.target>8</maven.compiler.target>
            <spark.version>3.1.1</spark.version>
            <spark.scala.version>2.12</spark.scala.version>
        </properties>
    
        <dependencies>
    
            <dependency>
                <groupId>org.apache.spark</groupId>
                <artifactId>spark-core_${spark.scala.version}</artifactId>
                <version>${spark.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.spark</groupId>
                <artifactId>spark-sql_${spark.scala.version}</artifactId>
                <version>${spark.version}</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.apache.spark</groupId>
                <artifactId>spark-yarn_${spark.scala.version}</artifactId>
                <version>${spark.version}</version>
            </dependency>
    
    
    
            
    
            
    
            
    
            
            
    
            
            
        </dependencies>
    
        <build>
            <plugins>
                
                <plugin>
                    <groupId>net.alchim31.maven</groupId>
                    <artifactId>scala-maven-plugin</artifactId>
                    <version>3.2.2</version>
                    <executions>
                        <execution>
                            
                            <goals>
                                <goal>testCompile</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
    
                
                
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-shade-plugin</artifactId>
                    <version>3.2.1</version>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>shade</goal>
                            </goals>
                            <configuration>
                                <filters>
                                    <filter>
                                        <artifact>*:*</artifact>
                                        <excludes>
                                            <exclude>META-INF/*.SF</exclude>
                                            <exclude>META-INF/*.DSA</exclude>
                                            <exclude>META-INF/*.RSA</exclude>
                                        </excludes>
                                    </filter>
                                </filters>
                                <transformers>
                                    <transformer
                                            implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                        <resource>reference.conf</resource>
                                    </transformer>
                                    
                                    <transformer
                                            implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                        <mainClass>com.zxl.spark.L01_WordCount</mainClass>
                                    </transformer>
                                </transformers>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
    
                
            </plugins>
        </build>
    
    </project>

## data ##

{
        "name":"zhangsan0","age":20}
    {
        "name":"zhangsan1","age":21}
    {
        "name":"zhangsan2","age":22}
    {
        "name":"zhangsan3","age":23}
    {
        "name":"zhangsan4","age":24}

## code ##

package com.zxl.spark.sql
    
    import org.apache.spark.sql.catalog.{
        Database, Table}
    import org.apache.spark.{
        SparkConf, SparkContext}
    import org.apache.spark.sql.{
        DataFrame, Dataset, SparkSession, catalog}
    
    object lesson01_sql_basic {
        
      def main(args: Array[String]): Unit = {
        
        //  sql字符串 ==》 dataset 是对rdd的包装
        //  只有rdd才能触发DAGScheduler
        val conf: SparkConf = new SparkConf().setMaster("local").setAppName("testsql")
        val session: SparkSession = SparkSession.builder()
          .config(conf)
          //.enableHiveSupport()  spark sql on hive需要开启  支持ddl
          .getOrCreate()
        //可以获取到sc
        val sparkContext: SparkContext = session.sparkContext
        sparkContext.setLogLevel("ERROR")
        val dataFrame: DataFrame = session.read.json("input/json")
        //展示数据
        println(">" * 50)
        dataFrame.show()
        //展示schema
        println(">" * 50)
        dataFrame.printSchema()
        //while (true){}
        println(">" * 50)
        val databases: Dataset[Database] = session.catalog.listDatabases()
        databases.show()
        println(">" * 50)
        val tables: Dataset[Table] = session.catalog.listTables()
        tables.show()
        println(">" * 50)
        val functions: Dataset[catalog.Function] = session.catalog.listFunctions()
        functions.show()
        println(">" * 50)
        dataFrame.createTempView("abc")
        val dataFrame1: DataFrame = session.sql("select * from abc")
        dataFrame1.show()
        println(">" * 50)
        session.catalog.listTables().show()
    
        import scala.io.StdIn._
        while (true){
        
          val sqlStr: String = readLine("input your sql:")
          session.sql(sqlStr).show()
        }
    
      }
    
    }

## 日志输出 ##

D:\Develop\Java\jdk1.8.0_202\bin\java.exe "-javaagent:D:\Programs\IntelliJ IDEA 2021.1.2\lib\idea_rt.jar=64167:D:\Programs\IntelliJ IDEA 2021.1.2\bin" -Dfile.encoding=UTF-8 -classpath 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com.zxl.spark.sql.lesson01_sql_basic
    Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
    21/08/11 16:43:56 INFO SparkContext: Running Spark version 3.1.1
    21/08/11 16:43:56 INFO ResourceUtils: ==============================================================
    21/08/11 16:43:56 INFO ResourceUtils: No custom resources configured for spark.driver.
    21/08/11 16:43:56 INFO ResourceUtils: ==============================================================
    21/08/11 16:43:56 INFO SparkContext: Submitted application: testsql
    21/08/11 16:43:56 INFO ResourceProfile: Default ResourceProfile created, executor resources: Map(cores -> name: cores, amount: 1, script: , vendor: , memory -> name: memory, amount: 1024, script: , vendor: , offHeap -> name: offHeap, amount: 0, script: , vendor: ), task resources: Map(cpus -> name: cpus, amount: 1.0)
    21/08/11 16:43:56 INFO ResourceProfile: Limiting resource is cpu
    21/08/11 16:43:56 INFO ResourceProfileManager: Added ResourceProfile id: 0
    21/08/11 16:43:57 INFO SecurityManager: Changing view acls to: 张学亮,ÕÅѧÁÁ
    21/08/11 16:43:57 INFO SecurityManager: Changing modify acls to: 张学亮,ÕÅѧÁÁ
    21/08/11 16:43:57 INFO SecurityManager: Changing view acls groups to: 
    21/08/11 16:43:57 INFO SecurityManager: Changing modify acls groups to: 
    21/08/11 16:43:57 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(张学亮, ÕÅѧÁÁ); groups with view permissions: Set(); users  with modify permissions: Set(张学亮, ÕÅѧÁÁ); groups with modify permissions: Set()
    21/08/11 16:43:58 INFO Utils: Successfully started service 'sparkDriver' on port 64180.
    21/08/11 16:43:58 INFO SparkEnv: Registering MapOutputTracker
    21/08/11 16:43:58 INFO SparkEnv: Registering BlockManagerMaster
    21/08/11 16:43:58 INFO BlockManagerMasterEndpoint: Using org.apache.spark.storage.DefaultTopologyMapper for getting topology information
    21/08/11 16:43:58 INFO BlockManagerMasterEndpoint: BlockManagerMasterEndpoint up
    21/08/11 16:43:58 INFO SparkEnv: Registering BlockManagerMasterHeartbeat
    21/08/11 16:43:58 INFO DiskBlockManager: Created local directory at C:\Users\zhang\AppData\Local\Temp\blockmgr-ee5ef4fa-cc86-49c2-b3f0-371b4c491776
    21/08/11 16:43:58 INFO MemoryStore: MemoryStore started with capacity 1987.5 MiB
    21/08/11 16:43:58 INFO SparkEnv: Registering OutputCommitCoordinator
    21/08/11 16:43:58 INFO Utils: Successfully started service 'SparkUI' on port 4040.
    21/08/11 16:43:58 INFO SparkUI: Bound SparkUI to 0.0.0.0, and started at http://ZXLT:4040
    21/08/11 16:43:58 INFO Executor: Starting executor ID driver on host ZXLT
    21/08/11 16:43:58 INFO Utils: Successfully started service 'org.apache.spark.network.netty.NettyBlockTransferService' on port 64203.
    21/08/11 16:43:58 INFO NettyBlockTransferService: Server created on ZXLT:64203
    21/08/11 16:43:58 INFO BlockManager: Using org.apache.spark.storage.RandomBlockReplicationPolicy for block replication policy
    21/08/11 16:43:58 INFO BlockManagerMaster: Registering BlockManager BlockManagerId(driver, ZXLT, 64203, None)
    21/08/11 16:43:58 INFO BlockManagerMasterEndpoint: Registering block manager ZXLT:64203 with 1987.5 MiB RAM, BlockManagerId(driver, ZXLT, 64203, None)
    21/08/11 16:43:58 INFO BlockManagerMaster: Registered BlockManager BlockManagerId(driver, ZXLT, 64203, None)
    21/08/11 16:43:58 INFO BlockManager: Initialized BlockManager: BlockManagerId(driver, ZXLT, 64203, None)
    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    +---+---------+
    |age|     name|
    +---+---------+
    | 20|zhangsan0|
    | 21|zhangsan1|
    | 22|zhangsan2|
    | 23|zhangsan3|
    | 24|zhangsan4|
    +---+---------+
    
    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    root
     |-- age: long (nullable = true)
     |-- name: string (nullable = true)
    
    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    +-------+----------------+--------------------+
    |   name|     description|         locationUri|
    +-------+----------------+--------------------+
    |default|default database|file:/E:/Workspac...|
    +-------+----------------+--------------------+
    
    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    +----+--------+-----------+---------+-----------+
    |name|database|description|tableType|isTemporary|
    +----+--------+-----------+---------+-----------+
    +----+--------+-----------+---------+-----------+
    
    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    +----------+--------+-----------+--------------------+-----------+
    |      name|database|description|           className|isTemporary|
    +----------+--------+-----------+--------------------+-----------+
    |         !|    null|       null|org.apache.spark....|       true|
    |         %|    null|       null|org.apache.spark....|       true|
    |         &|    null|       null|org.apache.spark....|       true|
    |         *|    null|       null|org.apache.spark....|       true|
    |         +|    null|       null|org.apache.spark....|       true|
    |         -|    null|       null|org.apache.spark....|       true|
    |         /|    null|       null|org.apache.spark....|       true|
    |         <|    null|       null|org.apache.spark....|       true|
    |        <=|    null|       null|org.apache.spark....|       true|
    |       <=>|    null|       null|org.apache.spark....|       true|
    |         =|    null|       null|org.apache.spark....|       true|
    |        ==|    null|       null|org.apache.spark....|       true|
    |         >|    null|       null|org.apache.spark....|       true|
    |        >=|    null|       null|org.apache.spark....|       true|
    |         ^|    null|       null|org.apache.spark....|       true|
    |       abs|    null|       null|org.apache.spark....|       true|
    |      acos|    null|       null|org.apache.spark....|       true|
    |     acosh|    null|       null|org.apache.spark....|       true|
    |add_months|    null|       null|org.apache.spark....|       true|
    | aggregate|    null|       null|org.apache.spark....|       true|
    +----------+--------+-----------+--------------------+-----------+
    only showing top 20 rows
    
    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    +---+---------+
    |age|     name|
    +---+---------+
    | 20|zhangsan0|
    | 21|zhangsan1|
    | 22|zhangsan2|
    | 23|zhangsan3|
    | 24|zhangsan4|
    +---+---------+
    
    >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    +----+--------+-----------+---------+-----------+
    |name|database|description|tableType|isTemporary|
    +----+--------+-----------+---------+-----------+
    | abc|    null|       null|TEMPORARY|       true|
    +----+--------+-----------+---------+-----------+
    
    input your sql:select name from abc
    +---------+
    |     name|
    +---------+
    |zhangsan0|
    |zhangsan1|
    |zhangsan2|
    |zhangsan3|
    |zhangsan4|
    +---------+
    
    input your sql:select age from abc
    +---+
    |age|
    +---+
    | 20|
    | 21|
    | 22|
    | 23|
    | 24|
    +---+
    
    input your sql:select * from abc
    +---+---------+
    |age|     name|
    +---+---------+
    | 20|zhangsan0|
    | 21|zhangsan1|
    | 22|zhangsan2|
    | 23|zhangsan3|
    | 24|zhangsan4|
    +---+---------+
    
    input your sql:
    Process finished with exit code -1