hive安裝

Hive只在一個節點上安裝即可

1.上傳tar包

2.解壓

tar -zxvf hive-0.9.0.tar.gz -C /cloud/

3.安裝mysql數據庫（切換到root用戶）（裝在哪里沒有限制，只有能聯通hadoop集群的節點）

mysql安裝僅供參考，不同版本mysql有各自的安裝流程

rpm -qa | grep mysql

rpm -e mysql-libs-5.1.66-2.el6_3.i686 --nodeps

rpm -ivh MySQL-server-5.1.73-1.glibc23.i386.rpm 

rpm -ivh MySQL-client-5.1.73-1.glibc23.i386.rpm 

修改mysql的密碼

/usr/bin/mysql_secure_installation

（注意：刪除匿名用戶，允許用戶遠程連接）

登陸mysql

mysql -u root -p

4.配置hive

（a）配置HIVE_HOME環境變量  vi conf/hive-env.sh 配置其中的$hadoop_home

（b）配置元數據庫信息   vi  hive-site.xml 

添加如下內容：

<configuration>

<property>

<name>javax.jdo.option.ConnectionURL</name>

<value>jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true</value>

<description>JDBC connect string for a JDBC metastore</description>

</property>

<property>

<name>javax.jdo.option.ConnectionDriverName</name>

<value>com.mysql.jdbc.Driver</value>

<description>Driver class name for a JDBC metastore</description>

</property>

<property>

<name>javax.jdo.option.ConnectionUserName</name>

<value>root</value>

<description>username to use against metastore database</description>

</property>

<property>

<name>javax.jdo.option.ConnectionPassword</name>

<value>root</value>

<description>password to use against metastore database</description>

</property>

</configuration>

5.安裝hive和mysq完成后，將mysql的連接jar包拷貝到$HIVE_HOME/lib目錄下

如果出現沒有權限的問題，在mysql授權(在安裝mysql的機器上執行)

mysql -uroot -p

#(執行下面的語句  *.*:所有庫下的所有表   %：任何IP地址或主機都可以連接)

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;

FLUSH PRIVILEGES;

6. Jline包版本不一致的問題，需要拷貝hive的lib目錄中jline.2.12.jar的jar包替換掉hadoop中的 

/home/hadoop/app/hadoop-2.6.4/share/hadoop/yarn/lib/jline-0.9.94.jar

啟動hive

bin/hive

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6.建表(默認是內部表)

create table trade_detail(id bigint, account string, income double, expenses double, time string) row format delimited fields terminated by '\t';

建分區表

create table td_part(id bigint, account string, income double, expenses double, time string) partitioned by (logdate string) row format delimited fields terminated by '\t';

建外部表

create external table td_ext(id bigint, account string, income double, expenses double, time string) row format delimited fields terminated by '\t' location '/td_ext';

7.創建分區表

普通表和分區表區別：有大量數據增加的需要建分區表

create table book (id bigint, name string) partitioned by (pubdate string) row format delimited fields terminated by '\t'; 

分區表加載數據

load data local inpath './book.txt' overwrite into table book partition (pubdate='2010-08-22');

load data local inpath '/root/data.am' into table beauty partition (nation="USA");

select nation, avg(size) from beauties group by nation order by avg(size);