环境：
Hadoop2.2.0
hive0.13.1
Ubuntu 14.04 LTS
java version "1.7.0_60"
Oracle10g
到以下地址下载安装包
http://mirrors.cnnic.cn/apache/hive/stable/apache-hive-0.13.1-bin.tar.gz
安装包解压到服务器上
/home/fulong/Hive/apache-hive-0.13.1-bin
修改环境变量，添加以下内容
export HIVE_HOME=/home/fulong/Hive/apache-hive-0.13.1-bin
export PATH=$HIVE_HOME/bin:$PATH
进到conf目录下拷贝模板配置文件重命名
fulong@FBI006:~/Hive/apache-hive-0.13.1-bin/conf$ ls
hive-default.xml.template hive-exec-log4j.properties.template
hive-env.sh.template hive-log4j.properties.template
fulong@FBI006:~/Hive/apache-hive-0.13.1-bin/conf$ cp hive-env.sh.template hive-env.sh
fulong@FBI006:~/Hive/apache-hive-0.13.1-bin/conf$ cp hive-default.xml.template hive-site.xml
fulong@FBI006:~/Hive/apache-hive-0.13.1-bin/conf$ ls
hive-default.xml.template hive-env.sh.template hive-log4j.properties.template
hive-env.sh hive-exec-log4j.properties.template hive-site.xml
修改配置文件hive-env.sh中的以下几处，分别制定Hadoop的根目录，Hive的conf和lib目录
# Set HADOOP_HOME to point to a specific hadoop install directory
HADOOP_HOME=/home/fulong/Hadoop/hadoop-2.2.0
# Hive Configuration Directory can be controlled by:
export HIVE_CONF_DIR=/home/fulong/Hive/apache-hive-0.13.1-bin/conf
# Folder containing extra ibraries required for hive compilation/execution can be controlled by:
export HIVE_AUX_JARS_PATH=/home/fulong/Hive/apache-hive-0.13.1-bin/lib
修改配置文件hive-site.sh中的以下几处连接Oracle相关参数
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:oracle:thin:@192.168.0.138:1521:orcl</value>
<description>JDBC connect string for a JDBC metastore</description>
</property>
<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
<description>Driver class name for a JDBC metastore</description>
</property>
<property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>hive</value>
<description>username to use against metastore database</description>
</property>
<property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>hivefbi</value>
<description>password to use against metastore database</description>
</property>
配置log4j
在$HIVE_HOME下创建log4j目录，用于存储日志文件
拷贝模板重命名
fulong@FBI006:~/Hive/apache-hive-0.13.1-bin/conf$ cp hive-log4j.properties.template hive-log4j.properties
修改存放日志的目录
hive.log.dir=/home/fulong/Hive/apache-hive-0.13.1-bin/log4j
拷贝Oracle JDBC的jar包
将对应Oracle的jdbc包拷贝到$HIVE_HOME/lib下
启动Hive
fulong@FBI006:~/Hive/apache-hive-0.13.1-bin$ hive
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.reduce.tasks is deprecated. Instead, use mapreduce.job.reduces
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.min.split.size is deprecated. Instead, use mapreduce.input.fileinputformat.split.minsize
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.reduce.tasks.speculative.execution is deprecated. Instead, use mapreduce.reduce.speculative
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.min.split.size.per.node is deprecated. Instead, use mapreduce.input.fileinputformat.split.minsize.per.node
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.input.dir.recursive is deprecated. Instead, use mapreduce.input.fileinputformat.input.dir.recursive
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.min.split.size.per.rack is deprecated. Instead, use mapreduce.input.fileinputformat.split.minsize.per.rack
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.max.split.size is deprecated. Instead, use mapreduce.input.fileinputformat.split.maxsize
14/08/20 17:14:05 INFO Configuration.deprecation: mapred.committer.job.setup.cleanup.needed is deprecated. Instead, use mapreduce.job.committer.setup.cleanup.needed
14/08/20 17:14:05 WARN conf.HiveConf: DEPRECATED: hive.metastore.ds.retry.* no longer has any effect. Use hive.hmshandler.retry.* instead
Logging initialized using configuration in file:/home/fulong/Hive/apache-hive-0.13.1-bin/conf/hive-log4j.properties
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /home/fulong/Hadoop/hadoop-2.2.0/lib/native/libhadoop.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
hive>
验证
打算创建一张表存储搜狗实验室下载的用户搜索行为日志。
数据下载地址：
http://www.sogou.com/labs/dl/q.html
首先创建表：
hive> create table searchlog (time string,id string,sword string,rank int,clickrank int,url string) row format delimited fields terminated by 't' lines terminated by 'n' stored as textfile;
此时会报错：
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:javax.jdo.JDODataStoreException: An exception was thrown while adding/validating class(es) : ORA-01754: a table may contain only one column of type LONG
解决办法：
用解压缩工具打开${HIVE_HOME}/lib中的hive-metastore-0.13.0.jar，发现名为package.jdo的文件，打开该文件并找到下面的内容。
<field name="viewOriginalText" default-fetch-group="false">
<column name="VIEW_ORIGINAL_TEXT" jdbc-type="LONGVARCHAR"/>
</field>
<field name="viewExpandedText" default-fetch-group="false">
<column name="VIEW_EXPANDED_TEXT" jdbc-type="LONGVARCHAR"/>
</field>
可以发现列VIEW_ORIGINAL_TEXT和VIEW_EXPANDED_TEXT的类型都为LONGVARCHAR，对应于Oracle中的LONG，这样就与Oracle表只能存在一列类型为LONG的列的要求相矛盾，所以就出现错误了。
按照Hive官网的建议将该两列的jdbc-type的值改为CLOB，修改后的内容如下所示。
<field name="viewOriginalText"default-fetch-group="false">
<column name="VIEW_ORIGINAL_TEXT" jdbc-type="CLOB"/>
</field>
<field name="viewExpandedText"default-fetch-group="false">
<column name="VIEW_EXPANDED_TEXT" jdbc-type="CLOB"/>
</field>
修改以后，重启hive。
重新执行创建表的命令，创建表成功：
hive> create table searchlog (time string,id string,sword string,rank int,clickrank int,url string) row format delimited fields terminated by 't' lines terminated by 'n' stored as textfile;
OK
Time taken: 0.986 seconds
将本地数据加载进表中：
hive> load data local inpath '/home/fulong/Downloads/SogouQ.reduced' overwrite into table searchlog;
Copying data from file:/home/fulong/Downloads/SogouQ.reduced
Copying file: file:/home/fulong/Downloads/SogouQ.reduced
Loading data to table default.searchlog
rmr: DEPRECATED: Please use 'rm -r' instead.
Deleted hdfs://fulonghadoop/user/hive/warehouse/searchlog
Table default.searchlog stats: [numFiles=1, numRows=0, totalSize=152006060, rawDataSize=0]
OK
Time taken: 25.705 seconds
查看所有表：
hive> show tables;
OK
searchlog
Time taken: 0.139 seconds, Fetched: 1 row(s)
统计行数：
hive> select count(*) from searchlog;
Total jobs = 1
Launching Job 1 out of 1
Number of reduce tasks determined at compile time: 1
In order to change the average load for a reducer (in bytes):
set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
set mapreduce.job.reduces=<number>
Starting Job = job_1407233914535_0001, Tracking URL = http://FBI003:8088/proxy/application_1407233914535_0001/
Kill Command = /home/fulong/Hadoop/hadoop-2.2.0/bin/hadoop job -kill job_1407233914535_0001
Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 1
2014-08-20 18:03:17,667 Stage-1 map = 0%, reduce = 0%
2014-08-20 18:04:05,426 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 3.46 sec
2014-08-20 18:04:27,317 Stage-1 map = 100%, reduce = 100%, Cumulative CPU 4.74 sec
MapReduce Total cumulative CPU time: 4 seconds 740 msec
Ended Job = job_1407233914535_0001
MapReduce Jobs Launched:
Job 0: Map: 1 Reduce: 1 Cumulative CPU: 4.74 sec HDFS Read: 152010455 HDFS Write: 8 SUCCESS
Total MapReduce CPU Time Spent: 4 seconds 740 msec
OK
1724264
Time taken: 103.154 seconds, Fetched: 1 row(s)
