hive 表注释中文乱码：https://blog.csdn.net/qq_36835255/article/details/121870438
    Access denied for user ‘root’@’%’ to database ‘information_schema’
    在MySQL中执行：user hive3，在hive连接mysql时，创建数据库hive3

    1. 修改表字段注解和表注解
    2. alter table COLUMNS_V2 modify column COMMENT varchar(256) character set utf8;
    3. alter table TABLE_PARAMS modify column PARAM_VALUE varchar(4000) character set utf8;
    4. 修改分区字段注解
    5. alter table PARTITION_PARAMS modify column PARAM_VALUE varchar(4000) character set utf8 ;
    6. 修改索引注解
    7. alter table PARTITION_KEYS modify column PKEY_COMMENT varchar(4000) character set utf8;