1、错误提示

ERROR 1558 (HY000): Column count of mysql.user is wrong. Expected 43, found 42. Created with MySQL 50560, now running 50645. Please use mysql_upgrade to fix this error.

意思是数据库以前做过升级但是数据库里的mysql库没有升级导致的权限混乱
2、解决办法
升级数据库使用命令
mysql_upgrade -uroot -p ‘密码’

Enter password:
Looking for 'mysql' as: mysql
Looking for 'mysqlcheck' as: mysqlcheck
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
mysql.columns_priv OK
mysql.db OK
mysql.event OK
mysql.func OK
mysql.general_log OK
mysql.help_category OK
mysql.help_keyword OK
mysql.help_relation OK
mysql.help_topic OK
mysql.host OK
mysql.ndb_binlog_index OK
mysql.plugin OK
mysql.proc OK
mysql.procs_priv OK
mysql.proxies_priv OK
mysql.servers 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
Running 'mysql_fix_privilege_tables'...
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
mysqlcheck: Got error: 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.2_b_cloud_provider FOR UPGRADE' at line 1 when executing 'CHECK TABLE ... FOR UPGRADE'
cb-fetch-data-pre.cron_task OK
cb-fetch-data-pre.cron_task_result OK
cb-fetch-data-pre.xxl_job_qrtz_blob_triggers OK
cb-fetch-data-pre.xxl_job_qrtz_calendars OK
cb-fetch-data-pre.xxl_job_qrtz_cron_triggers OK
cb-fetch-data-pre.xxl_job_qrtz_fired_triggers OK
cb-fetch-data-pre.xxl_job_qrtz_job_details OK
cb-fetch-data-pre.xxl_job_qrtz_locks OK
cb-fetch-data-pre.xxl_job_qrtz_paused_trigger_grps OK
cb-fetch-data-pre.xxl_job_qrtz_scheduler_state OK
cb-fetch-data-pre.xxl_job_qrtz_simple_triggers OK
cb-fetch-data-pre.xxl_job_qrtz_simprop_triggers OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_group OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_info OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_log OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_logglue OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_registry OK
cb-fetch-data-pre.xxl_job_qrtz_triggers OK
cloudbest-index-point-pre.b_cloud_provider OK
cloudbest-index-point-pre.cron_task OK
cloudbest-index-point-pre.cron_task_result_2019_09 OK
cloudbest-index-point-pre.cron_task_result_2019_10 OK
cloudbest-index-point-pre.cron_task_result_2019_11 OK
cloudbest-index-point-pre.cron_task_result_2019_12 OK
cloudbest-index-point-pre.cron_task_result_2020_01 OK
cloudbest-index-point-pre.cron_task_result_2020_02 OK
cloudbest-index-point-pre.cron_task_result_2020_03 OK
cloudbest-index-point-pre.cron_task_result_2020_04 OK
cloudbest-index-point-pre.cron_task_result_2020_05 OK
cloudbest-index-point-pre.cron_task_result_2020_06 OK
cloudbest-index-point-pre.cron_task_result_2020_07 OK
cloudbest-index-point-pre.cron_task_result_2020_08 OK
cloudbest-index-point-pre.cron_task_result_2020_09 OK
cloudbest-index-point-pre.i_index_rank OK
cloudbest-index-point-pre.i_instances OK
cloudbest-index-point-pre.i_model OK
cloudbest-index-point-pre.i_model_price OK
cloudbest-index-point-pre.i_performance_reportes OK
cloudbest-index-point-pre.i_region OK
cloudbest-index-point-pre.statistic_index OK
cloudbest-market.ddos_accounts OK
cloudbest-market.ddos_custom OK
cloudbest-market.ddos_shield_info OK
cloudbest-market.ddos_task_queue OK
cloudbest-order.cb_order OK
FATAL ERROR: Error during call to mysql_check for upgrading the tables names on all db(s) except mysql

最后一个错误是因为其他的数据库表没法更改，这个不会影响。 到这算是解决上面的错误。权限可以正常使用了