Hive扩展功能(六)--HPL/SQL(可使用存储过程)

软件环境:

linux系统: CentOS6.7
Hadoop版本: 2.6.5
zookeeper版本: 3.4.8

主机配置:

一共m1, m2, m3这三部机, 每部主机的用户名都为centos

192.168.179.201: m1 
192.168.179.202: m2 
192.168.179.203: m3 

m1: Zookeeper, Namenode, DataNode, ResourceManager, NodeManager, Master, Worker
m2: Zookeeper, Namenode, DataNode, ResourceManager, NodeManager, Worker
m3: Zookeeper, DataNode, NodeManager, Worker

资料:

搭建教程:
    http://lxw1234.com/archives/2015/09/487.htm
下载HPL/SQL地址:
    http://www.hplsql.org/download
HPL/SQL官网:
    http://www.hplsql.org/doc

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注意事项:

一定不能在HPL/SQL上使用Hive语法的语句,要使用MySQL或Oracle等其他HPL/SQL支持的数据库(具体可去官网查看),不然会报找不到dual表或者dual表中无该字段的错误,切记

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版本选择:

在HPL/SQL0.3.17版本(必须是0.3.17或者0.3.17之后的版本)解决了强制读From dual表的问题, 而本次安装的是Hive2.1.1版本自带的是HPLSQL0.3.31版本, 已解决强制读From dual表的问题.
若要解决强制读From dual表的问题,应下载一个0.3.17或0.3.17之后版本的HPL/SQL, 然后将解压后得到的hplsql-0.3.17.jar包放入$HIVE_HOME/lib包下, 并重命名为hive-hplsql-*.jar格式的包,如:hive-hplsql-0.3.17.jar

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1.编辑hive-site.xml文件

HPL/SQL与Hive是通过thrift方式连接, 编辑hive-site.xml, 添加以下配置项

    hive.server2.thrift.bind.host
    m1


    hive.server2.thrift.port
    10000

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2.编辑hplsql-site.xml文件

配置HPL/SQL与Hive的连接, 创建hplsql-site.xml文件(若已有则无需创建), 并将以下配置项拷贝到文件中

  hplsql.conn.default
  hive2conn
  The default connection profile


  hplsql.conn.hiveconn
  org.apache.hadoop.hive.jdbc.HiveDriver;jdbc:hive://
  Hive embedded JDBC (not requiring HiveServer)



  hplsql.conn.init.hiveconn
  
     set mapred.job.queue.name=default;
     set hive.execution.engine=mr; 
     use default;
  
  Statements for execute after connection to the database


  hplsql.conn.convert.hiveconn
  true
  Convert SQL statements before execution


  hplsql.conn.hive2conn
  org.apache.hive.jdbc.HiveDriver;jdbc:hive2://m1:10000
  HiveServer2 JDBC connection



  hplsql.conn.init.hive2conn
  
     set mapred.job.queue.name=default;
     set hive.execution.engine=mr; 
     use default;
  
  Statements for execute after connection to the database


  hplsql.conn.convert.hive2conn
  true
  Convert SQL statements before execution


  hplsql.conn.db2conn
  com.ibm.db2.jcc.DB2Driver;jdbc:db2://localhost:50001/dbname;user;password
  IBM DB2 connection


  hplsql.conn.tdconn
  com.teradata.jdbc.TeraDriver;jdbc:teradata://localhost/database=dbname,logmech=ldap;user;password
  Teradata connection


  hplsql.conn.mysqlconn
  com.mysql.jdbc.Driver;jdbc:mysql://localhost/test;user;password
  MySQL connection


  hplsql.dual.table
  default.dual
  Single row, single column table for internal operations


  hplsql.insert.values
  native
  How to execute INSERT VALUES statement: native (default) and select


  hplsql.onerror
  exception
  Error handling behavior: exception (default), seterror and stop


  hplsql.temp.tables
  native
  Temporary tables: native (default) and managed


  hplsql.temp.tables.schema
  
  Schema for managed temporary tables


  hplsql.temp.tables.location
  /home/centos/soft/hive/tmp/plhql
  LOcation for managed temporary tables in HDFS



hive.server2.thrift.bind.host
m1


hive.server2.thrift.port
10000

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3.配置dual表 (此步骤可跳过)

启动Hive服务,依照在hplsql-site.xml文件中的配置去创建(默认是在default库中创建了dual表)

use default;
create table dual(DUMMY VARCHAR(1));

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4.在使用hplsql存储过程前, 需先启动HiveServer2和Metastore服务

sh $HIVE_HOME/bin/hive  --service  metastore
sh $HIVE_HOME/bin/hive  --service  hiveserver2

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