hive 向表中插入查询数据 job运行完报错 如何解决

Loading data to table sogou2.sogou_partition partition (year=null, month=null, day=null, hour=null)Failed with exception MetaException(message:javax.jdo.JDODataStoreException: Error(s) were found while auto-creating/validating the datastore for classes. The errors are printed in the log, and are attached to this exception.NestedThrowablesStackTrace:com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 767 bytes以用alter database hive character set latin1;修改过还是出现错误FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MoveTask