使用MySQL作为Hive的Metastore

先确保你已经成功安装了HIVE和MYSQL在hive-site.xml中添加如下内容，指定METASTORE的地址以及连接方式lt;propertygt; lt;

先确保你已经成功安装了HIVE和MYSQL

在hive-site.xml中添加如下内容，指定METASTORE的地址以及连接方式

javax.jdo.option.ConnectionURL
jdbc:mysql://10.20.151.10:3306/hive?characterEncoding=UTF-8
JDBC connect string for a JDBC metastore


javax.jdo.option.ConnectionDriverName
com.mysql.jdbc.Driver
Driver class name for a JDBC metastore


javax.jdo.option.ConnectionUserName
hive_user
username to use against metastore database


javax.jdo.option.ConnectionPassword
123
password to use against metastore database

然后登陆到HIVE客户端，创建一个表试试

[gpadmin1@Hadoop5 hive-0.6.0]$ bin/hive
Hive history file=/tmp/gpadmin1/hive_job_log_gpadmin1_201106081130_1156785421.txt
hive> show tables;
FAILED: Error in metadata: javax.jdo.JDOFatalDataStoreException: Unknown database 'hive'
NestedThrowables:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'hive'
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask

报错了，提示很明显，识别不到名称为hive的database，，难道要自己创建？试试

[Intranet root@ /var/lib/mysql]
#mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 41
Server version: 5.5.12 MySQL Community Server (GPL)

Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)

mysql> create database hive;
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| hive |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)

再登陆到HIVE里看看

[gpadmin1@hadoop5 hive-0.6.0]$ bin/hive
Hive history file=/tmp/gpadmin1/hive_job_log_gpadmin1_201106081130_544334815.txt
hive> show table;
FAILED: Parse Error: line 0:-1 mismatched input '' expecting EXTENDED in show statement

hive> show tables;
OK
Time taken: 5.173 seconds
hive> CREATE TABLE u_tmp1 (id1 INT,
> id2 int
> )
> ROW FORMAT DELIMITED
> FIELDS TERMINATED BY ',';
OK
Time taken: 0.266 seconds
hive> show tables;
OK
u_tmp1
Time taken: 0.197 seconds
hive>

OK了，果然是这个问题