MySQL table primary key type changed from int to bigint

Requirements: Due to business needs, Tmp_employees's Emp_no primary key field type int has not satisfied the business requirements, you need to change the table primary key field type from int to bigint

Use tool: Pt-online-schema-change

./pt-online-schema-change--user=root--password=root456--recursion-method= "processlist"--alter= "modify column emp _no bigint NOT NULL auto_increment "H=192.168.31.64,p=3306,d=employees,t=tmp_employees--execute

MySQL table primary key type changed from int to bigint