求一段mysql的逻辑
没错，又是我，上次没说清楚
类似评论的功能
表table1内有字段topicid,floor,time,text
如何实现相同的topicid内floor自增，同时插入时加锁(防止高并发同floor)。还有一个需求，删除一行floor，floor依然增加(想没删除一样)。(exmaple:INSERT得floor=1,删除该行,再INSERT得floor=2)
最好能有php代码，感谢
回复内容：
没错，又是我，上次没说清楚
类似评论的功能
表table1内有字段topicid,floor,time,text
如何实现相同的topicid内floor自增，同时插入时加锁(防止高并发同floor)。还有一个需求，删除一行floor，floor依然增加(想没删除一样)。(exmaple:INSERT得floor=1,删除该行,再INSERT得floor=2)
最好能有php代码，感谢
已参考wordpress解决
专门搞一个自增长表，在这个表插数据来生成ID。
一般这种需求都是设计菜鸟设计的
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