Error: Table "mysql"."innodb_table_stats" not found
MySQL SLAVE 升级到 5.6.21-enterprise-commercial-advanced-log 后，启动时报如下错误
InnoDB: Error: Fetch of persistent statistics requested for table "test"."orderqueue" but the required system tables mysql.innodb_table_stats and mysql.innodb_index_stats are not present or have unexpected structure. Using transient stats insttestd.
InnoDB: Error: Table "mysql"."innodb_table_stats" not found.
InnoDB: Recalculation of persistent statistics requested for table "test"."orderqueue" but the required persistent statistics storage is not present or is corrupted. Using transient stats insttestd.
由于是将低版本的MySQL datadir目录直接拷贝到5.6.21-enterprise-commercial-advanced-log的，低版本的mysql这个schema中并没有innodb_table_stats，innodb_index_stats这些表。所以登录到mysql这个schema中手工创建这些表后，重启mysql即可。
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 `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;