执行hive脚本报错！！！关于"Specified key was too long; max key length is 767 bytes"

1.执行hive脚本报错，怎么呀不会想到是MySQL出问题了！

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) : Specified key was too long; max key length is 767 bytes
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 767 bytes
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:408)
	at com.mysql.jdbc.Util.getInstance(Util.java:383)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1062)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4226)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4158)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2834)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2783)
	at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:908)
	at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:788)
	at com.jolbox.bonecp.StatementHandle.execute(StatementHandle.java:254)
	at org.datanucleus.store.rdbms.table.AbstractTable.executeDdlStatement(AbstractTable.java:760)
	at org.datanucleus.store.rdbms.table.AbstractTable.executeDdlStatementList(AbstractTable.java:711)
	at org.datanucleus.store.rdbms.table.AbstractTable.create(AbstractTable.java:425)
	at org.datanucleus.store.rdbms.table.AbstractTable.exists(AbstractTable.java:488)
	at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.performTablesValidation(RDBMSStoreManager.java:3380)
	at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.addClassTablesAndValidate(RDBMSStoreManager.java:3190)
	at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.run(RDBMSStoreManager.java:2841)
	at org.datanucleus.store.rdbms.AbstractSchemaTransaction.execute(AbstractSchemaTransaction.java:122)
	at org.datanucleus.store.rdbms.RDBMSStoreManager.addClasses(RDBMSStoreManager.java:1605)
	at org.datanucleus.store.AbstractStoreManager.addClass(AbstractStoreManager.java:954)
	at org.datanucleus.store.rdbms.RDBMSStoreManager.getDatastoreClass(RDBMSStoreManager.java:679)
	at org.datanucleus.store.rdbms.RDBMSStoreManager.getPropertiesForGenerator(RDBMSStoreManager.java:2045)
	at org.datanucleus.store.AbstractStoreManager.getStrategyValue(AbstractStoreManager.java:1365)
	at org.datanucleus.ExecutionContextImpl.newObjectId(ExecutionContextImpl.java:3827)
	at org.datanucleus.state.JDOStateManager.setIdentity(JDOStateManager.java:2571)
	at org.datanucleus.state.JDOStateManager.initialiseForPersistentNew(JDOStateManager.java:513)
	at org.datanucleus.state.ObjectProviderFactoryImpl.newForPersistentNew(ObjectProviderFactoryImpl.java:232)
	at org.datanucleus.ExecutionContextImpl.newObjectProviderForPersistentNew(ExecutionContextImpl.java:1414)
	at org.datanucleus.ExecutionContextImpl.persistObjectInternal(ExecutionContextImpl.java:2218)
	at org.datanucleus.ExecutionContextImpl.persistObjectWork(ExecutionContextImpl.java:2065)
	at org.datanucleus.ExecutionContextImpl.persistObject(ExecutionContextImpl.java:1913)
	at org.datanucleus.ExecutionContextThreadedImpl.persistObject(ExecutionContextThreadedImpl.java:217)

2.解决方法
进入mysql执行如下语句即可！！！！

alter database metastore character set latin1;

提示：其中metastore 要换成你自己整合后的源数据库！！！