MESSAGE: Native table 'performance_schema'.'session_variables' has the wrong structure

--從mysql5.7.6開始information_schema.global_status已經開始被捨棄，爲了兼容性，此時需要打開 show_compatibility_56 2）character_set_database ， collation_database  Value改爲utf8，修改my.conf [client] default-character-set=utf8  [mys

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