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[英]MYSQL How do I update a table only if a unique key pair of two columns does not exist in another table?
[英]How do I delete a foreign key that does not exist from a table that does not exist, in MySQL?
我试图重命名InnoDB表中的主键,但我一直得到Errno150。SHOW INNODB STATUS显示:
LATEST FOREIGN KEY ERROR
130711 18:22:53 Error in foreign key constraint of table xx/client_location_business_load:
there is no index in referenced table which would contain
the columns as the first columns, or the data types in the
referenced table do not match the ones in table. Constraint:
,
CONSTRAINT "business_load_business_load_name_key" FOREIGN KEY ("name_id") REFERENCES "client_businesstype_load_name" ("name_id") ON DELETE CASCADE ON UPDATE CASCADE
表client_location_business_load
甚至不存在! 它被重命名。 名为business_load_business_load_name_key
的约束也不存在,已被删除并且它也没有出现在information_schema.key_column_usage
。
有人知道这里发生了什么吗?
您必须删除数据库并以相同的排序规则重新创建它。 似乎没有其他选择。
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