• --------------------通过spark2.x版本将数据导入hive中出现的问题-----------------------


    一:将数据手动导入hive中

    (1)先将数据和脚本用上传工具传入/home/hadoop中

    (2)在虚拟机中 ./hive -f /home/hadoop/createHiveTab.sql 运行该命令,数据将手动导入hive中

    (在这里注意hive -f 和 hive -e 的区别):

     ./hive -f /home/hadoop/createHiveTab.sql

    hive -f 后面指定的是一个文件,然后文件里面直接写sql,就可以运行hive的sql,

     ./hive -e "show databases;use default;show tables;"

    hive -e 后面是直接用双引号拼接hivesql,然后就可以执行命令

      

    脚本 createHiveTab.sql:

    set hive.support.sql11.reserved.keywords=false;
    
    CREATE TABLE IF NOT EXISTS traffic.monitor_flow_action(  
    date string ,  
    monitor_id string ,  
    camera_id string ,  
    car string ,  
    action_time string ,
    speed string  ,
    road_id string,
    area_id string
    )  
    ROW FORMAT DELIMITED FIELDS TERMINATED BY '	' ; 
    
    load data local inpath '/home/hadoop/monitor_flow_action' into table traffic.monitor_flow_action; 
    
    CREATE TABLE IF NOT EXISTS traffic.monitor_camera_info(  
    monitor_id string ,  
    camera_id string 
    )  
    ROW FORMAT DELIMITED FIELDS TERMINATED BY '	' ; 
    
    load data local inpath '/home/hadoop/monitor_camera_info' into table traffic.monitor_camera_info; 
    

      

    二:将数据自动导入hive中 :

    (1)在maven项目中pom.xml中引入hive整合包

     <dependency>
                <groupId>org.apache.spark</groupId>
                <artifactId>spark-hive_2.11</artifactId>
                <version>${spark.version}</version>
     </dependency>

    (2)把hive中这个路径下的/root/Downloads/apache-hive-1.2.0-bin/conf中的 hive-site.xml 这个放到resource下

    <configuration>
        <property>
            <name>javax.jdo.option.ConnectionURL</name>
            <value>jdbc:mysql://主机名:端口号/数据库名?createDatabaseIfNotExist=true</value>
        </property>
        <property>
            <name>javax.jdo.option.ConnectionDriverName</name>
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property>
            <name>javax.jdo.option.ConnectionUserName</name>
            <value>root</value>
        </property>
        <property>
            <name>javax.jdo.option.ConnectionPassword</name>
            <value>hadoop</value>
        </property>
    </configuration>

    (3)spark sql 声明对hive支持  运行idea下面的代码,数据会自动在hive数仓中生成 !

    object HiveAsDataDource {
      def main(args: Array[String]): Unit = {
        val spark: SparkSession = SparkSession.builder()
          .appName("HiveAsDataDource")
          .master("local[*]")
          .enableHiveSupport()
          .getOrCreate()
     //  自动将数据写入hive中
        spark.sql("create database IF NOT EXISTS traffic")
        spark.sql("USE traffic")
        spark.sql("DROP TABLE IF EXISTS monitor_flow_action")
        //在hive 中创建monitor_flow_action表
        spark.sql("CREATE TABLE IF NOT EXISTS monitor_flow_action"+
          "(date STRING,monitor_id STRING,camera_id STRING,car STRING,action_time STRING,speed STRING,road_id STRING,area_id STRING)"+
          " row format delimited fields terminated by '	'")
    
        spark.sql("load data local inpath 'file:///D:/data/monitor_flow_action' into table monitor_flow_action")
        //在hive 中创建monitor_camera_info表
        spark.sql("DROP TABLE IF EXISTS monitor_camera_info")
        spark.sql("CREATE TABLE IF NOT EXISTS monitor_camera_info (monitor_id STRING,camera_id STRING) row format delimited fields terminated by '	'")
        spark.sql("LOAD DATA" + " LOCAL INPATH 'file:///D:/data/monitor_camera_info'" + "INTO TABLE monitor_camera_info")
        System.out.println("===========data2hive finish===========")
    
        spark.close()
    
        }
      }
    

     (4)注意红色的地方,file前面不能有空格,///转义,否则报

    Exception in thread "main" org.apache.spark.sql.AnalysisException: LOAD DATA input path does not exist
    

      (5)额外补充:删除hive数据库中已经存在的数据库的命令是:

    drop database 数据库名 cascade;
    

      

  • 相关阅读:
    2019中山纪念中学夏令营-Day19 数论初步【GCD(最大公约数),素数相关】
    2019中山纪念中学夏令营-Day14 图论初步【dijkstra算法求最短路】
    2019中山纪念中学夏令营-Day12[JZOJ]
    2019中山纪念中学夏令营-Day9[JZOJ](第六次模拟赛)
    2019中山纪念中学夏令营-Day4[JZOJ]
    2019中山纪念中学夏令营-Day2[JZOJ]
    2019中山纪念中学夏令营-Day1[JZOJ]
    CCPC2019江西省赛-Problem G.Traffic
    T137223 节能主义
    T137226 彩虹海
  • 原文地址:https://www.cnblogs.com/helloaugust/p/11559103.html
Copyright © 2020-2023  润新知