现象
mysql>select * from sys.host_summary;
ERROR 1356 (HY000): View 'sys.host_summary' references invalid table(s) or column(s) \
or function(s) or definer/invoker of view lack rights to use themmysql>select * from sys.host_summary;
ERRO
阅读背景：
MySQL5.7.24 误删sys库，sys库表报错的解决方法_FEI441544558的专栏_mysql sys库损坏
来源：互联网
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