问题1：
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:For direct MetaStore DB connections, we don't support retries at the client level.)
解决方案：
字符集问题，设置mysql字符集：
mysql>alter database hive character set latin1;
错误2：
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:Got exception: org.apache.hadoop.security.AccessControlException Permission denied: user=root, access=WRITE, inode="/user/hive/warehouse/cm***x.db/tb_*******_day":hadoop:supergroup:drwxr-xr-x
解决方案：
切换到hadoop用户执行，不行再设置权限hadoop dfs -chmod -R 777 /user/hive/warehouse
错误3：
FAILED: ParseException line 28:0 missing EOF at 'WITH' near ''\u0000''
解决方案：
先去掉sql中的
NULL DEFINED AS '\u0000'
WITH SERDEPROPERTIES ('escape.delim'='\\')
执行sql，创建表，再执行修改表
alter table user_event_data set serdeproperties('serialization.null.format' = '\u0000','escape.delim'='\\');