我这里的MySQL是8.0.x版本
代码语言：txt复制[test]> \s
--------------
mysql Ver 8.0.36-28 for Linux on x86_64 (Percona Server (GPL), Release 28, Revision 47601f19)
Connection id: 174
Current database: test
Current user: root@localhost
SSL: Not in use
Current pager: less
Using outfile: ''
Using delimiter: ;
Server version: 8.0.36-28 Percona Server (GPL), Release 28, Revision 47601f19
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: utf8mb4
Db characterset: utf8mb4
Client characterset: utf8mb4
Conn. characterset: utf8mb4
UNIX socket: /data/mysql/mysql.sock
Uptime: 6 hours 40 min 16 sec
Threads: 1 Questions: 106121 Slow queries: 20 Opens: 341 Flush tables: 4 Open tables: 175 Queries per second avg: 4.418
--------------binlog_event.h 源码里面有，看下图框起来的地方，可知表名和字段名最大为64字符。
不信可以建表试试：
表长度最大64
表列长度最大长度也是64
列