问题出现在 MySQL 8.0 备份 MySQL 5.7 数据库时。

		
mysqldump: Couldn't execute 'SELECT COLUMN_NAME, JSON_EXTRACT(HISTOGRAM, '$."number-of-buckets-specified"')                FROM information_schema.COLUMN_STATISTICS                WHERE SCHEMA_NAME = 'testra' AND TABLE_NAME = 'branch';': Unknown table 'column_statistics' in information_schema (1109)		
		
		

解决办法，使用 --column-statistics=0 选项

		
mysqldump -hdb.netkiller.cn -uroot -ptest neo --column-statistics=0