mysql 5.6升级到mysql5.7查看参数报错
root@localhost [(none)]>show variables like '%data%'; ERROR 1682 (HY000): Native table 'performance_schema'.'session_variables' has the wrong structure
--从mysql5.7.6开始information_schema.global_status已经开始被舍弃，为了兼容性，此时需要打开 show_compatibility_56
解决办法
root@localhost [(none)]>set @@global.show_compatibility_56=ON; Query OK, 0 rows affected (0.00 sec) root@localhost [(none)]>show variables like '%data%'; +---------------------------------------+-----------------------------+ | Variable_name | Value | +---------------------------------------+-----------------------------+ | character_set_database | utf8 | | collation_database | utf8_general_ci | | datadir | /data/mysql/mysql3306/data/ | | innodb_data_file_path | ibdata1:12M:autoextend | | innodb_data_home_dir | | | innodb_stats_on_metadata | OFF | | innodb_temp_data_file_path | ibtmp1:12M:autoextend | | max_length_for_sort_data | 1024 | | metadata_locks_cache_size | 1024 | | metadata_locks_hash_instances | 64 | | myisam_data_pointer_size | 6 | | performance_schema_max_metadata_locks | -1 | | skip_show_database | OFF | | updatable_views_with_limit | YES | +---------------------------------------+-----------------------------+ 14 rows in set (0.00 sec)