情况描述
Hive建表时报错，元数据存储在mysql中。
报错信息
如下：
FAILED: Execution Error, return code from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:javax.jdo.JDODataStoreException: An exception was thrown while adding/validating class(es) : Specified key was too long; max key length is bytes
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is bytes
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:)
at java.lang.reflect.Constructor.newInstance(Constructor.java:)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:)
at com.mysql.jdbc.Util.getInstance(Util.java:)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:)
at com.jolbox.bonecp.StatementHandle.execute(StatementHandle.java:)
解决方法：
修改数据库编码，在mysql机器的上命令行中运行:
alter database hive character set latin1;