解决Hive表中中文注释乱码问题

1.在Hive的元数据表下运行下面命令：

#修改字段注释字符集
ALTER TABLE COLUMNS_V2 modify column COMMENT varchar(256) character set utf8;
#修改表注释字符集
ALTER TABLE TABLE_PARAMS modify column PARAM_VALUE varchar(20000) character set utf8;
#修改分区参数，支持分区建用中文表示
ALTER TABLE PARTITION_PARAMS modify column PARAM_VALUE varchar(20000) character set utf8;
ALTER TABLE PARTITION_KEYS modify column PKEY_COMMENT varchar(20000) character set utf8;
#修改索引名注释，支持中文注释
ALTER TABLE INDEX_PARAMS modify column PARAM_VALUE varchar(4000) character set utf8;
#修改视图，支持视图中文
ALTER TABLE TBLS modify COLUMN VIEW_EXPANDED_TEXT mediumtext CHARACTER SET utf8;
ALTER TABLE TBLS modify COLUMN VIEW_ORIGINAL_TEXT mediumtext CHARACTER SET utf8;

2.修改hive-site.xml中Hive读取元数据的编码。

 <property>
 <name>javax.jdo.option.ConnectionURL</name>
 <value>jdbc:mysql://hadoop102:3306/metastore?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8</value>
</property>