Hive擴展功能(六)--HPL/SQL(可以使用存儲過程)

軟件環境:

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

主機配置:

一共m1, m2, m3這五部機, 每部主機的用戶名都爲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

資料:

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

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注意事項:

必定不能在HPL/SQL上使用Hive語法的語句,要使用MySQL或Oracle等其餘HPL/SQL支持的數據庫(具體可去官網查看),否則會報找不到dual表或者dual表中無該字段的錯誤,切記

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版本選擇:

在HPL/SQL0.3.17版本(必須是0.3.17或者0.3.17以後的版本)解決了強制讀From dual表的問題, 而本次安裝的是Hive2.1.1版本自帶的是HPLSQL0.3.31版本, 已解決強制讀From dual表的問題.
若要解決強制讀From dual表的問題,應下載一個0.3.17或0.3.17以後版本的HPL/SQL, 而後將解壓後獲得的hplsql-0.3.17.jar包放入$HIVE_HOME/lib包下, 並重命名爲hive-hplsql-*.jar格式的包,如:hive-hplsql-0.3.17.jar

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1.編輯hive-site.xml文件

HPL/SQL與Hive是經過thrift方式鏈接, 編輯hive-site.xml, 添加如下配置項

<property>
    <name>hive.server2.thrift.bind.host</name>
    <value>m1</value>
</property>
<property>
    <name>hive.server2.thrift.port</name>
    <value>10000</value>
</property>

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2.編輯hplsql-site.xml文件

配置HPL/SQL與Hive的鏈接, 建立hplsql-site.xml文件(若已有則無需建立), 並將如下配置項拷貝到文件中

<configuration>
<property>
  <name>hplsql.conn.default</name>
  <value>hive2conn</value>
  <description>The default connection profile</description>
</property>
<property>
  <name>hplsql.conn.hiveconn</name>
  <value>org.apache.hadoop.hive.jdbc.HiveDriver;jdbc:hive://</value>
  <description>Hive embedded JDBC (not requiring HiveServer)</description>
</property>
<!-- 配置項hive.execution.engine默認設置爲mr,若使用spark做爲引擎時,則設置爲spark -->
<property>
  <name>hplsql.conn.init.hiveconn</name>
  <value>
     set mapred.job.queue.name=default;
     set hive.execution.engine=mr; 
     use default;
  </value>
  <description>Statements for execute after connection to the database</description>
</property>
<property>
  <name>hplsql.conn.convert.hiveconn</name>
  <value>true</value>
  <description>Convert SQL statements before execution</description>
</property>
<property>
  <name>hplsql.conn.hive2conn</name>
  <value>org.apache.hive.jdbc.HiveDriver;jdbc:hive2://m1:10000</value>
  <description>HiveServer2 JDBC connection</description>
</property>
<!-- 配置項hive.execution.engine默認設置爲mr,若使用spark做爲引擎時,則設置爲spark -->
<property>
  <name>hplsql.conn.init.hive2conn</name>
  <value>
     set mapred.job.queue.name=default;
     set hive.execution.engine=mr; 
     use default;
  </value>
  <description>Statements for execute after connection to the database</description>
</property>
<property>
  <name>hplsql.conn.convert.hive2conn</name>
  <value>true</value>
  <description>Convert SQL statements before execution</description>
</property>
<property>
  <name>hplsql.conn.db2conn</name>
  <value>com.ibm.db2.jcc.DB2Driver;jdbc:db2://localhost:50001/dbname;user;password</value>
  <description>IBM DB2 connection</description>
</property>
<property>
  <name>hplsql.conn.tdconn</name>
  <value>com.teradata.jdbc.TeraDriver;jdbc:teradata://localhost/database=dbname,logmech=ldap;user;password</value>
  <description>Teradata connection</description>
</property>
<property>
  <name>hplsql.conn.mysqlconn</name>
  <value>com.mysql.jdbc.Driver;jdbc:mysql://localhost/test;user;password</value>
  <description>MySQL connection</description>
</property>
<property>
  <name>hplsql.dual.table</name>
  <value>default.dual</value>
  <description>Single row, single column table for internal operations</description>
</property>
<property>
  <name>hplsql.insert.values</name>
  <value>native</value>
  <description>How to execute INSERT VALUES statement: native (default) and select</description>
</property>
<property>
  <name>hplsql.onerror</name>
  <value>exception</value>
  <description>Error handling behavior: exception (default), seterror and stop</description>
</property>
<property>
  <name>hplsql.temp.tables</name>
  <value>native</value>
  <description>Temporary tables: native (default) and managed</description>
</property>
<property>
  <name>hplsql.temp.tables.schema</name>
  <value></value>
  <description>Schema for managed temporary tables</description>
</property>
<property>
  <name>hplsql.temp.tables.location</name>
  <value>/home/centos/soft/hive/tmp/plhql</value>
  <description>LOcation for managed temporary tables in HDFS</description>
</property>
<!-- 下面兩項須要按實際狀況修改 -->
<property>
<name>hive.server2.thrift.bind.host</name>
<value>m1</value>
</property>
<property>
<name>hive.server2.thrift.port</name>
<value>10000</value>
</property>
</configuration>

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3.配置dual表 (此步驟可跳過)

啓動Hive服務,依照在hplsql-site.xml文件中的配置去建立(默認是在default庫中建立了dual表)

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

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4.在使用hplsql存儲過程前, 需先啓動HiveServer2和Metastore服務

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