--------------------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 '\t' ; 

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 '\t' ; 

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

 
            org.apache.spark
            spark-hive_2.11
            ${spark.version}
 

(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


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

(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 '\t'")

    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 '\t'")
    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;

  

转载于:https://www.cnblogs.com/helloaugust/p/11559103.html

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