备份binding执行计划
mysql -uroot -h127.0.0.1 -P4000 -p -NBe "select * mysql.bind_info\G" > /home/db/tidb/bing_info$(date +"%m%d").txt
反向创建binding执行计划
mysql -uroot -h127.0.0.1 -P4000 -p -NBe "SELECT concat('use ', default_db,';', 'CREATE GLOBAL BINDING for ', original_sql ,' using ', bind_sql ,';') from …