今天在操作zabbix页面时，添加agent主机监控，发现添加错了，于是想删除再重新添加，却出现了以下问题，提示语句错误，如下图：
然后查看mysql数据库日志：
发现都是一大堆的innodb_table_stats表的问题
InnoDB: Error: Table "mysql"."innodb_table_stats" not found.
使用sqlyog连接数据库，打开mysql，找到innodb_table_stats，右击打开，提示错误
然后其他表也都顺便点了打开，找到红框有5张表一样提示错误问题。
解决方法也简单，先删除表，删除对应的数据文件，然后重新建表，重启mysql即可。
1、 删除这5张表
DROP TABLE mysql.innodb_index_stats;
DROP TABLE mysql.innodb_table_stats;
DROP TABLE mysql.slave_master_info;
DROP TABLE mysql.slave_relay_log_info;
DROP TABLE mysql.slave_worker_info;
2、 删除对应的数据文件，一般是.ibd、.frm结尾的
例如我的mysql数据文件在这目录 /data/mysql/data/mysql
由于发现只有这5个前缀一样的，所以我直接执行删除
rm –rf innodb*
rm –rf slave*
3、 重新建表，执行以下语句，如果到slave_master_info提示报错，先执行后面2条，再执行master的
CREATE TABLE innodb_index_stats (database_name varchar(64) COLLATE utf8_bin NOT NULL,table_name varchar(64) COLLATE utf8_bin NOT NULL,index_name varchar(64) COLLATE utf8_bin NOT NULL,last_update timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,stat_name varchar(64) COLLATE utf8_bin NOT NULL,stat_value bigint(20) unsigned NOT NULL,sample_size bigint(20) unsigned DEFAULT NULL,stat_description varchar(1024) COLLATE utf8_bin NOT NULL,
PRIMARY KEY (database_name,table_name,index_name,stat_name)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0;
CREATE TABLE innodb_table_stats (database_name varchar(64) COLLATE utf8_bin NOT NULL,table_name varchar(64) COLLATE utf8_bin NOT NULL,last_update timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,n_rows bigint(20) unsigned NOT NULL,clustered_index_size bigint(20) unsigned NOT NULL,sum_of_other_index_sizes bigint(20) unsigned NOT NULL,
PRIMARY KEY (database_name,table_name)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0;
CREATE TABLE slave_master_info (Number_of_lines int(10) unsigned NOT NULL COMMENT 'Number of lines in the file.',Master_log_name text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log currently being read from the master.',Master_log_pos bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last read event.',Host char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '' COMMENT 'The host name of the master.',User_name text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The user name used to connect to the master.',User_password text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The password used to connect to the master.',Port int(10) unsigned NOT NULL COMMENT 'The network port used to connect to the master.',Connect_retry int(10) unsigned NOT NULL COMMENT 'The period (in seconds) that the slave will wait before trying to reconnect to the master.',Enabled_ssl tinyint(1) NOT NULL COMMENT 'Indicates whether the server supports SSL connections.',Ssl_ca text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Authority (CA) certificate.',Ssl_capath text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path to the Certificate Authority (CA) certificates.',Ssl_cert text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL certificate file.',Ssl_cipher text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the cipher in use for the SSL connection.',Ssl_key text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL key file.',Ssl_verify_server_cert tinyint(1) NOT NULL COMMENT 'Whether to verify the server certificate.',Heartbeat float NOT NULL,Bind text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'Displays which interface is employed when connecting to the MySQL server',Ignored_server_ids text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The number of server IDs to be ignored, followed by the actual server IDs',Uuid text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The master server uuid.',Retry_count bigint(20) unsigned NOT NULL COMMENT 'Number of reconnect attempts, to the master, before giving up.',Ssl_crl text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Revocation List (CRL)',Ssl_crlpath text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path used for Certificate Revocation List (CRL) files',Enabled_auto_position tinyint(1) NOT NULL COMMENT 'Indicates whether GTIDs will be used to retrieve events from the master.',
PRIMARY KEY (Host,Port)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Master Information';
CREATE TABLE slave_relay_log_info (Number_of_lines int(10) unsigned NOT NULL COMMENT 'Number of lines in the file or rows in the table. Used to version table definitions.',Relay_log_name text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the current relay log file.',Relay_log_pos bigint(20) unsigned NOT NULL COMMENT 'The relay log position of the last executed event.',Master_log_name text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log file from which the events in the relay log file were read.',Master_log_pos bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last executed event.',Sql_delay int(11) NOT NULL COMMENT 'The number of seconds that the slave must lag behind the master.',Number_of_workers int(10) unsigned NOT NULL,Id int(10) unsigned NOT NULL COMMENT 'Internal Id that uniquely identifies this record.',
PRIMARY KEY (Id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Relay Log Information';
CREATE TABLE slave_worker_info (Id int(10) unsigned NOT NULL,Relay_log_name text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,Relay_log_pos bigint(20) unsigned NOT NULL,Master_log_name text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,Master_log_pos bigint(20) unsigned NOT NULL,Checkpoint_relay_log_name text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,Checkpoint_relay_log_pos bigint(20) unsigned NOT NULL,Checkpoint_master_log_name text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,Checkpoint_master_log_pos bigint(20) unsigned NOT NULL,Checkpoint_seqno int(10) unsigned NOT NULL,Checkpoint_group_size int(10) unsigned NOT NULL,Checkpoint_group_bitmap blob NOT NULL,
PRIMARY KEY (Id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Worker Information';
然后重启mysql，查看mysql日志文件，发现正常了，回到zabbix页面，也可以正常删除了！
结论：innodb_index_stats和innodb_table_stats 这2张表和innodb引擎关联的，如果mysql使用的是innodb引擎，这2张表出问题了，相应的SQL数据操作就会出问题。
参考文档：
https://www.linuxidc.com/Linux/2015-05/117521.htm