Column count of mysql.user is wrong. Expected 45, found 42. The table is probably corrupted

今天升级MySQL数据库，从5.5升级到5.7，升级完成后，遇到Column count of mysql.user is wrong. Expected 45, found 42. The table is probably corrupted报错，经过查找资料发现是数据库升级后需要更新数据库状态。

使用：

mysql_upgrade -u root -p

C:Program FilesMySQLMySQL Server 5.7bin>mysql_upgrade -u root -p
Enter password: *********
Checking if update is needed.
Checking server version.
Running queries to upgrade MySQL server.
Checking system database.
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.engine_cost                                  OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.gtid_executed                                OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.host                                         OK
mysql.innodb_index_stats                           OK
mysql.innodb_table_stats                           OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.server_cost                                  OK
mysql.servers                                      OK
mysql.slave_master_info                            OK
mysql.slave_relay_log_info                         OK
mysql.slave_worker_info                            OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
The sys schema is already up to date (version 1.5.1).
Found 0 sys functions, but expected 22. Re-installing the sys schema.
Upgrading the sys schema.
Checking databases.
sys.sys_config                                     OK
tgaqb.auth_group                                   OK
tgaqb.auth_group_permissions                       OK
tgaqb.auth_permission                              OK
tgaqb.auth_user                                    OK
tgaqb.auth_user_groups                             OK
tgaqb.auth_user_user_permissions                   OK
tgaqb.django_admin_log                             OK
tgaqb.django_content_type                          OK
tgaqb.django_migrations                            OK
tgaqb.django_session                               OK
tgaqb.tgaqb_safe_file                              OK
tgsafer.t_itemclass                                OK
tgsafer.t_itemprice                                OK
tgsafer.t_itemreceive                              OK
tgsafer.t_trouble                                  OK
tgsafer.t_troubletype                              OK
tgsafer.t_user                                     OK
tgsafer.t_userlevel                                OK
tgsafer.t_userleveltype                            OK
tgsafer.t_userrose                                 OK
tgsafer.t_workers                                  OK
Upgrade process completed successfully.
Checking if update is needed.

C:Program FilesMySQLMySQL Server 5.7bin>

然后问他得到解决。

最后

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