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HomeBackend DevelopmentPHP Tutorial论坛版块发帖数量的计数

论坛每个版块在数据库中对应一条记录,其中一个字段(posts)用来统计该版块发帖数量,请问这个posts字段该如何维护呢?

1 如果用户发帖/删帖的时候更新该字段,即发帖posts=posts+1,删帖posts=posts-1,并发的时候该如何保证数据的正确呢?
2 如果不用上述的方法,怎样处理更好呢?


回复讨论(解决方案)

一般的论坛有删帖权限的应该是版主和管理员吧。。

对同一个表的同一条记录,任何时刻都只会执行一条指令。
所以并不存在你所谓的并发问题

对同一个表的同一条记录,任何时刻都只会执行一条指令。
所以并不存在你所谓的并发问题



不用做任何安全处理吗?

不存在安全问题,要处理什么?

不存在安全问题,要处理什么?



比如锁定表之类的

另外,如果同时发帖/删帖比较多的话,mysql数据库服务器压力能承受吗?

不要把数据库想的那么弱智
你必须承认:数据库开发者们的能力比你强的多

如果耽心数据库压力太大,那你本就该使用视图,而不是自己维护计数器组

不要把数据库想的那么弱智
你必须承认:数据库开发者们的能力比你强的多

如果耽心数据库压力太大,那你本就该使用视图,而不是自己维护计数器组



如果用视图,需要子查询,然后再多表连接查询,如果数据量积累到很大的话,数据库同样存在较大的压力。

对于这两种方案,不知道哪个好一些。参考了一下discuzX3.1,发现他的表里pre_forum_forum里用计数器(posts)实现的。
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